greybus-dev

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[PATCH v2] staging: greybus: arche-platform: Switch to the gpio descriptor interface

by Nishad Kamdar

Use the gpiod interface instead of the deprecated old non-descriptor interface. Signed-off-by: Nishad Kamdar <nishadkamdar(a)gmail.com> --- Changes in v2: - Move comment to the same line as to what it applies to. --- drivers/staging/greybus/arche-platform.c | 119 ++++++++--------------- 1 file changed, 41 insertions(+), 78 deletions(-) diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c index 4c36e88766e7..a5cea79d8e32 100644 --- a/drivers/staging/greybus/arche-platform.c +++ b/drivers/staging/greybus/arche-platform.c @@ -8,10 +8,9 @@ #include <linux/clk.h> #include <linux/delay.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/module.h> -#include <linux/of_gpio.h> #include <linux/of_platform.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> @@ -45,14 +44,14 @@ enum svc_wakedetect_state { struct arche_platform_drvdata { /* Control GPIO signals to and from AP <=> SVC */ - int svc_reset_gpio; + struct gpio_desc *svc_reset; + struct gpio_desc *svc_sysboot; bool is_reset_act_hi; - int svc_sysboot_gpio; - int wake_detect_gpio; /* bi-dir,maps to WAKE_MOD & WAKE_FRAME signals */ + struct gpio_desc *wake_detect; /* bi-dir,maps to WAKE_MOD & WAKE_FRAME signals */ enum arche_platform_state state; - int svc_refclk_req; + struct gpio_desc *svc_refclk_req; struct clk *svc_ref_clk; struct pinctrl *pinctrl; @@ -85,9 +84,9 @@ static void arche_platform_set_wake_detect_state( arche_pdata->wake_detect_state = state; } -static inline void svc_reset_onoff(unsigned int gpio, bool onoff) +static inline void svc_reset_onoff(struct gpio_desc *gpio, bool onoff) { - gpio_set_value(gpio, onoff); + gpiod_set_value(gpio, onoff); } static int apb_cold_boot(struct device *dev, void *data) @@ -116,7 +115,6 @@ static int apb_poweroff(struct device *dev, void *data) static void arche_platform_wd_irq_en(struct arche_platform_drvdata *arche_pdata) { /* Enable interrupt here, to read event back from SVC */ - gpio_direction_input(arche_pdata->wake_detect_gpio); enable_irq(arche_pdata->wake_detect_irq); } @@ -160,7 +158,7 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) spin_lock_irqsave(&arche_pdata->wake_lock, flags); - if (gpio_get_value(arche_pdata->wake_detect_gpio)) { + if (gpiod_get_value(arche_pdata->wake_detect)) { /* wake/detect rising */ /* @@ -224,10 +222,10 @@ arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata) dev_info(arche_pdata->dev, "Booting from cold boot state\n"); - svc_reset_onoff(arche_pdata->svc_reset_gpio, + svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi); - gpio_set_value(arche_pdata->svc_sysboot_gpio, 0); + gpiod_set_value(arche_pdata->svc_sysboot, 0); usleep_range(100, 200); ret = clk_prepare_enable(arche_pdata->svc_ref_clk); @@ -238,7 +236,7 @@ arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata) } /* bring SVC out of reset */ - svc_reset_onoff(arche_pdata->svc_reset_gpio, + svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi); arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_ACTIVE); @@ -259,10 +257,10 @@ arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata) dev_info(arche_pdata->dev, "Switching to FW flashing state\n"); - svc_reset_onoff(arche_pdata->svc_reset_gpio, + svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi); - gpio_set_value(arche_pdata->svc_sysboot_gpio, 1); + gpiod_set_value(arche_pdata->svc_sysboot, 1); usleep_range(100, 200); @@ -273,7 +271,7 @@ arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata) return ret; } - svc_reset_onoff(arche_pdata->svc_reset_gpio, + svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi); arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_FW_FLASHING); @@ -305,7 +303,7 @@ arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pdata) clk_disable_unprepare(arche_pdata->svc_ref_clk); /* As part of exit, put APB back in reset state */ - svc_reset_onoff(arche_pdata->svc_reset_gpio, + svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi); arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF); @@ -435,6 +433,7 @@ static int arche_platform_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; int ret; + unsigned int flags; arche_pdata = devm_kzalloc(&pdev->dev, sizeof(*arche_pdata), GFP_KERNEL); @@ -444,61 +443,33 @@ static int arche_platform_probe(struct platform_device *pdev) /* setup svc reset gpio */ arche_pdata->is_reset_act_hi = of_property_read_bool(np, "svc,reset-active-high"); - arche_pdata->svc_reset_gpio = of_get_named_gpio(np, - "svc,reset-gpio", - 0); - if (!gpio_is_valid(arche_pdata->svc_reset_gpio)) { - dev_err(dev, "failed to get reset-gpio\n"); - return arche_pdata->svc_reset_gpio; - } - ret = devm_gpio_request(dev, arche_pdata->svc_reset_gpio, "svc-reset"); - if (ret) { - dev_err(dev, "failed to request svc-reset gpio:%d\n", ret); - return ret; - } - ret = gpio_direction_output(arche_pdata->svc_reset_gpio, - arche_pdata->is_reset_act_hi); - if (ret) { - dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret); + if (arche_pdata->is_reset_act_hi) + flags = GPIOD_OUT_HIGH; + else + flags = GPIOD_OUT_LOW; + + arche_pdata->svc_reset = devm_gpiod_get(dev, "svc,reset-gpio", flags); + if (IS_ERR(arche_pdata->svc_reset)) { + ret = PTR_ERR(arche_pdata->svc_reset); + dev_err(dev, "failed to request svc-reset GPIO:%d\n", ret); return ret; } arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF); - arche_pdata->svc_sysboot_gpio = of_get_named_gpio(np, - "svc,sysboot-gpio", - 0); - if (!gpio_is_valid(arche_pdata->svc_sysboot_gpio)) { - dev_err(dev, "failed to get sysboot gpio\n"); - return arche_pdata->svc_sysboot_gpio; - } - ret = devm_gpio_request(dev, arche_pdata->svc_sysboot_gpio, "sysboot0"); - if (ret) { - dev_err(dev, "failed to request sysboot0 gpio:%d\n", ret); - return ret; - } - ret = gpio_direction_output(arche_pdata->svc_sysboot_gpio, 0); - if (ret) { - dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret); + arche_pdata->svc_sysboot = devm_gpiod_get(dev, "svc,sysboot-gpio", + GPIOD_OUT_LOW); + if (IS_ERR(arche_pdata->svc_sysboot)) { + ret = PTR_ERR(arche_pdata->svc_sysboot); + dev_err(dev, "failed to request sysboot0 GPIO: %d\n", ret); return ret; } /* setup the clock request gpio first */ - arche_pdata->svc_refclk_req = of_get_named_gpio(np, - "svc,refclk-req-gpio", - 0); - if (!gpio_is_valid(arche_pdata->svc_refclk_req)) { - dev_err(dev, "failed to get svc clock-req gpio\n"); - return arche_pdata->svc_refclk_req; - } - ret = devm_gpio_request(dev, arche_pdata->svc_refclk_req, - "svc-clk-req"); - if (ret) { - dev_err(dev, "failed to request svc-clk-req gpio: %d\n", ret); - return ret; - } - ret = gpio_direction_input(arche_pdata->svc_refclk_req); - if (ret) { - dev_err(dev, "failed to set svc-clk-req gpio dir :%d\n", ret); + arche_pdata->svc_refclk_req = devm_gpiod_get(dev, "svc,refclk-req-gpio", + GPIOD_IN); + if (IS_ERR(arche_pdata->svc_refclk_req)) { + ret = PTR_ERR(arche_pdata->svc_refclk_req); + dev_err(dev, "failed to request svc-clk-req GPIO: %d\n", ret); return ret; } @@ -515,19 +486,11 @@ static int arche_platform_probe(struct platform_device *pdev) arche_pdata->num_apbs = of_get_child_count(np); dev_dbg(dev, "Number of APB's available - %d\n", arche_pdata->num_apbs); - arche_pdata->wake_detect_gpio = of_get_named_gpio(np, - "svc,wake-detect-gpio", - 0); - if (arche_pdata->wake_detect_gpio < 0) { - dev_err(dev, "failed to get wake detect gpio\n"); - return arche_pdata->wake_detect_gpio; - } - - ret = devm_gpio_request(dev, arche_pdata->wake_detect_gpio, - "wake detect"); - if (ret) { - dev_err(dev, "Failed requesting wake_detect gpio %d\n", - arche_pdata->wake_detect_gpio); + arche_pdata->wake_detect = devm_gpiod_get(dev, "svc,wake-detect-gpio", + GPIOD_IN); + if (IS_ERR(arche_pdata->wake_detect)) { + ret = PTR_ERR(arche_pdata->wake_detect); + dev_err(dev, "Failed requesting wake_detect GPIO %d\n", ret); return ret; } @@ -538,7 +501,7 @@ static int arche_platform_probe(struct platform_device *pdev) spin_lock_init(&arche_pdata->wake_lock); mutex_init(&arche_pdata->platform_state_mutex); arche_pdata->wake_detect_irq = - gpio_to_irq(arche_pdata->wake_detect_gpio); + gpiod_to_irq(arche_pdata->wake_detect); ret = devm_request_threaded_irq(dev, arche_pdata->wake_detect_irq, arche_platform_wd_irq, -- 2.17.1

6 years, 8 months

[PATCH] greybus: gpio: switch GPIO portions to use GPIOLIB_IRQCHIP

by Nishad Kamdar

Convert the GPIO driver to use the GPIO irqchip library GPIOLIB_IRQCHIP instead of reimplementing the same. Signed-off-by: Nishad Kamdar <nishadkamdar(a)gmail.com> --- drivers/staging/greybus/Kconfig | 1 + drivers/staging/greybus/gpio.c | 123 ++++++-------------------------- 2 files changed, 21 insertions(+), 103 deletions(-) diff --git a/drivers/staging/greybus/Kconfig b/drivers/staging/greybus/Kconfig index ab096bcef98c..b571e4e8060b 100644 --- a/drivers/staging/greybus/Kconfig +++ b/drivers/staging/greybus/Kconfig @@ -148,6 +148,7 @@ if GREYBUS_BRIDGED_PHY config GREYBUS_GPIO tristate "Greybus GPIO Bridged PHY driver" depends on GPIOLIB + select GPIOLIB_IRQCHIP ---help--- Select this option if you have a device that follows the Greybus GPIO Bridged PHY Class specification. diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c index b1d4698019a1..32c228bad33a 100644 --- a/drivers/staging/greybus/gpio.c +++ b/drivers/staging/greybus/gpio.c @@ -9,9 +9,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> -#include <linux/gpio.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> +#include <linux/gpio/driver.h> #include <linux/mutex.h> #include "greybus.h" @@ -40,8 +38,6 @@ struct gb_gpio_controller { struct gpio_chip chip; struct irq_chip irqc; struct irq_chip *irqchip; - struct irq_domain *irqdomain; - unsigned int irq_base; irq_flow_handler_t irq_handler; unsigned int irq_default_type; struct mutex irq_lock; @@ -365,6 +361,7 @@ static int gb_gpio_request_handler(struct gb_operation *op) { struct gb_connection *connection = op->connection; struct gb_gpio_controller *ggc = gb_connection_get_data(connection); + struct gpio_chip *gc = &ggc->chip; struct device *dev = &ggc->gbphy_dev->dev; struct gb_message *request; struct gb_gpio_irq_event_request *event; @@ -391,7 +388,7 @@ static int gb_gpio_request_handler(struct gb_operation *op) return -EINVAL; } - irq = irq_find_mapping(ggc->irqdomain, event->which); + irq = irq_find_mapping(gc->irq.domain, event->which); if (!irq) { dev_err(dev, "failed to find IRQ\n"); return -EINVAL; @@ -506,68 +503,6 @@ static int gb_gpio_controller_setup(struct gb_gpio_controller *ggc) return ret; } -/** - * gb_gpio_irq_map() - maps an IRQ into a GB gpio irqchip - * @d: the irqdomain used by this irqchip - * @irq: the global irq number used by this GB gpio irqchip irq - * @hwirq: the local IRQ/GPIO line offset on this GB gpio - * - * This function will set up the mapping for a certain IRQ line on a - * GB gpio by assigning the GB gpio as chip data, and using the irqchip - * stored inside the GB gpio. - */ -static int gb_gpio_irq_map(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq) -{ - struct gpio_chip *chip = domain->host_data; - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); - - irq_set_chip_data(irq, ggc); - irq_set_chip_and_handler(irq, ggc->irqchip, ggc->irq_handler); - irq_set_noprobe(irq); - /* - * No set-up of the hardware will happen if IRQ_TYPE_NONE - * is passed as default type. - */ - if (ggc->irq_default_type != IRQ_TYPE_NONE) - irq_set_irq_type(irq, ggc->irq_default_type); - - return 0; -} - -static void gb_gpio_irq_unmap(struct irq_domain *d, unsigned int irq) -{ - irq_set_chip_and_handler(irq, NULL, NULL); - irq_set_chip_data(irq, NULL); -} - -static const struct irq_domain_ops gb_gpio_domain_ops = { - .map = gb_gpio_irq_map, - .unmap = gb_gpio_irq_unmap, -}; - -/** - * gb_gpio_irqchip_remove() - removes an irqchip added to a gb_gpio_controller - * @ggc: the gb_gpio_controller to remove the irqchip from - * - * This is called only from gb_gpio_remove() - */ -static void gb_gpio_irqchip_remove(struct gb_gpio_controller *ggc) -{ - unsigned int offset; - - /* Remove all IRQ mappings and delete the domain */ - if (ggc->irqdomain) { - for (offset = 0; offset < (ggc->line_max + 1); offset++) - irq_dispose_mapping(irq_find_mapping(ggc->irqdomain, - offset)); - irq_domain_remove(ggc->irqdomain); - } - - if (ggc->irqchip) - ggc->irqchip = NULL; -} - /** * gb_gpio_irqchip_add() - adds an irqchip to a gpio chip * @chip: the gpio chip to add the irqchip to @@ -595,8 +530,7 @@ static int gb_gpio_irqchip_add(struct gpio_chip *chip, unsigned int type) { struct gb_gpio_controller *ggc; - unsigned int offset; - unsigned int irq_base; + unsigned int err; if (!chip || !irqchip) return -EINVAL; @@ -606,35 +540,21 @@ static int gb_gpio_irqchip_add(struct gpio_chip *chip, ggc->irqchip = irqchip; ggc->irq_handler = handler; ggc->irq_default_type = type; - ggc->irqdomain = irq_domain_add_simple(NULL, - ggc->line_max + 1, first_irq, - &gb_gpio_domain_ops, chip); - if (!ggc->irqdomain) { - ggc->irqchip = NULL; - return -EINVAL; - } - /* - * Prepare the mapping since the irqchip shall be orthogonal to - * any gpio calls. If the first_irq was zero, this is - * necessary to allocate descriptors for all IRQs. - */ - for (offset = 0; offset < (ggc->line_max + 1); offset++) { - irq_base = irq_create_mapping(ggc->irqdomain, offset); - if (offset == 0) - ggc->irq_base = irq_base; + err = gpiochip_irqchip_add(chip, + irqchip, + first_irq, + ggc->irq_handler, + type + ); + if (err) { + ggc->irqchip = NULL; + return err; } return 0; } -static int gb_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) -{ - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); - - return irq_find_mapping(ggc->irqdomain, offset); -} - static int gb_gpio_probe(struct gbphy_device *gbphy_dev, const struct gbphy_device_id *id) { @@ -693,7 +613,6 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev, gpio->get = gb_gpio_get; gpio->set = gb_gpio_set; gpio->set_config = gb_gpio_set_config; - gpio->to_irq = gb_gpio_to_irq; gpio->base = -1; /* Allocate base dynamically */ gpio->ngpio = ggc->line_max + 1; gpio->can_sleep = true; @@ -702,24 +621,23 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev, if (ret) goto exit_line_free; - ret = gb_gpio_irqchip_add(gpio, irqc, 0, - handle_level_irq, IRQ_TYPE_NONE); + ret = gpiochip_add(gpio); if (ret) { - dev_err(&gbphy_dev->dev, "failed to add irq chip: %d\n", ret); + dev_err(&gbphy_dev->dev, "failed to add gpio chip: %d\n", ret); goto exit_line_free; } - ret = gpiochip_add(gpio); + ret = gb_gpio_irqchip_add(gpio, irqc, 0, + handle_level_irq, IRQ_TYPE_NONE); if (ret) { - dev_err(&gbphy_dev->dev, "failed to add gpio chip: %d\n", ret); - goto exit_gpio_irqchip_remove; + dev_err(&gbphy_dev->dev, "failed to add irq chip: %d\n", ret); + gpiochip_remove(gpio); + goto exit_line_free; } gbphy_runtime_put_autosuspend(gbphy_dev); return 0; -exit_gpio_irqchip_remove: - gb_gpio_irqchip_remove(ggc); exit_line_free: kfree(ggc->lines); exit_connection_disable: @@ -743,7 +661,6 @@ static void gb_gpio_remove(struct gbphy_device *gbphy_dev) gb_connection_disable_rx(connection); gpiochip_remove(&ggc->chip); - gb_gpio_irqchip_remove(ggc); gb_connection_disable(connection); gb_connection_destroy(connection); kfree(ggc->lines); -- 2.17.1

6 years, 8 months

[PATCH v2] staging: greybus: gpio: switch GPIO portions to use GPIOLIB_IRQCHIP

by Nishad Kamdar

Convert the GPIO driver to use the GPIO irqchip library GPIOLIB_IRQCHIP instead of reimplementing the same. Signed-off-by: Nishad Kamdar <nishadkamdar(a)gmail.com> --- Changes in v2: - Retained irq.h and irqdomain.h headers. - Dropped function gb_gpio_irqchip_add() and called gpiochip_irqchip_add() from probe(). - Referred https://lkml.kernel.org/r/1476054589-28422-1-git-send-email-linus.walleij@l…. --- drivers/staging/greybus/Kconfig | 1 + drivers/staging/greybus/gpio.c | 184 ++++---------------------------- 2 files changed, 24 insertions(+), 161 deletions(-) diff --git a/drivers/staging/greybus/Kconfig b/drivers/staging/greybus/Kconfig index ab096bcef98c..b571e4e8060b 100644 --- a/drivers/staging/greybus/Kconfig +++ b/drivers/staging/greybus/Kconfig @@ -148,6 +148,7 @@ if GREYBUS_BRIDGED_PHY config GREYBUS_GPIO tristate "Greybus GPIO Bridged PHY driver" depends on GPIOLIB + select GPIOLIB_IRQCHIP ---help--- Select this option if you have a device that follows the Greybus GPIO Bridged PHY Class specification. diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c index b1d4698019a1..2ec54744171d 100644 --- a/drivers/staging/greybus/gpio.c +++ b/drivers/staging/greybus/gpio.c @@ -9,9 +9,9 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> -#include <linux/gpio.h> #include <linux/irq.h> #include <linux/irqdomain.h> +#include <linux/gpio/driver.h> #include <linux/mutex.h> #include "greybus.h" @@ -39,15 +39,8 @@ struct gb_gpio_controller { struct gpio_chip chip; struct irq_chip irqc; - struct irq_chip *irqchip; - struct irq_domain *irqdomain; - unsigned int irq_base; - irq_flow_handler_t irq_handler; - unsigned int irq_default_type; struct mutex irq_lock; }; -#define gpio_chip_to_gb_gpio_controller(chip) \ - container_of(chip, struct gb_gpio_controller, chip) #define irq_data_to_gpio_chip(d) (d->domain->host_data) static int gb_gpio_line_count_operation(struct gb_gpio_controller *ggc) @@ -276,7 +269,7 @@ static void _gb_gpio_irq_set_type(struct gb_gpio_controller *ggc, static void gb_gpio_irq_mask(struct irq_data *d) { struct gpio_chip *chip = irq_data_to_gpio_chip(d); - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); struct gb_gpio_line *line = &ggc->lines[d->hwirq]; line->masked = true; @@ -286,7 +279,7 @@ static void gb_gpio_irq_mask(struct irq_data *d) static void gb_gpio_irq_unmask(struct irq_data *d) { struct gpio_chip *chip = irq_data_to_gpio_chip(d); - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); struct gb_gpio_line *line = &ggc->lines[d->hwirq]; line->masked = false; @@ -296,7 +289,7 @@ static void gb_gpio_irq_unmask(struct irq_data *d) static int gb_gpio_irq_set_type(struct irq_data *d, unsigned int type) { struct gpio_chip *chip = irq_data_to_gpio_chip(d); - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); struct gb_gpio_line *line = &ggc->lines[d->hwirq]; struct device *dev = &ggc->gbphy_dev->dev; u8 irq_type; @@ -334,7 +327,7 @@ static int gb_gpio_irq_set_type(struct irq_data *d, unsigned int type) static void gb_gpio_irq_bus_lock(struct irq_data *d) { struct gpio_chip *chip = irq_data_to_gpio_chip(d); - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); mutex_lock(&ggc->irq_lock); } @@ -342,7 +335,7 @@ static void gb_gpio_irq_bus_lock(struct irq_data *d) static void gb_gpio_irq_bus_sync_unlock(struct irq_data *d) { struct gpio_chip *chip = irq_data_to_gpio_chip(d); - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); struct gb_gpio_line *line = &ggc->lines[d->hwirq]; if (line->irq_type_pending) { @@ -391,7 +384,7 @@ static int gb_gpio_request_handler(struct gb_operation *op) return -EINVAL; } - irq = irq_find_mapping(ggc->irqdomain, event->which); + irq = irq_find_mapping(ggc->chip.irq.domain, event->which); if (!irq) { dev_err(dev, "failed to find IRQ\n"); return -EINVAL; @@ -411,21 +404,21 @@ static int gb_gpio_request_handler(struct gb_operation *op) static int gb_gpio_request(struct gpio_chip *chip, unsigned int offset) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); return gb_gpio_activate_operation(ggc, (u8)offset); } static void gb_gpio_free(struct gpio_chip *chip, unsigned int offset) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); gb_gpio_deactivate_operation(ggc, (u8)offset); } static int gb_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); u8 which; int ret; @@ -439,7 +432,7 @@ static int gb_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) static int gb_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); return gb_gpio_direction_in_operation(ggc, (u8)offset); } @@ -447,14 +440,14 @@ static int gb_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) static int gb_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int value) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); return gb_gpio_direction_out_operation(ggc, (u8)offset, !!value); } static int gb_gpio_get(struct gpio_chip *chip, unsigned int offset) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); u8 which; int ret; @@ -468,7 +461,7 @@ static int gb_gpio_get(struct gpio_chip *chip, unsigned int offset) static void gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); gb_gpio_set_value_operation(ggc, (u8)offset, !!value); } @@ -476,7 +469,7 @@ static void gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) static int gb_gpio_set_config(struct gpio_chip *chip, unsigned int offset, unsigned long config) { - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); + struct gb_gpio_controller *ggc = gpiochip_get_data(chip); u32 debounce; if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE) @@ -506,135 +499,6 @@ static int gb_gpio_controller_setup(struct gb_gpio_controller *ggc) return ret; } -/** - * gb_gpio_irq_map() - maps an IRQ into a GB gpio irqchip - * @d: the irqdomain used by this irqchip - * @irq: the global irq number used by this GB gpio irqchip irq - * @hwirq: the local IRQ/GPIO line offset on this GB gpio - * - * This function will set up the mapping for a certain IRQ line on a - * GB gpio by assigning the GB gpio as chip data, and using the irqchip - * stored inside the GB gpio. - */ -static int gb_gpio_irq_map(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq) -{ - struct gpio_chip *chip = domain->host_data; - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); - - irq_set_chip_data(irq, ggc); - irq_set_chip_and_handler(irq, ggc->irqchip, ggc->irq_handler); - irq_set_noprobe(irq); - /* - * No set-up of the hardware will happen if IRQ_TYPE_NONE - * is passed as default type. - */ - if (ggc->irq_default_type != IRQ_TYPE_NONE) - irq_set_irq_type(irq, ggc->irq_default_type); - - return 0; -} - -static void gb_gpio_irq_unmap(struct irq_domain *d, unsigned int irq) -{ - irq_set_chip_and_handler(irq, NULL, NULL); - irq_set_chip_data(irq, NULL); -} - -static const struct irq_domain_ops gb_gpio_domain_ops = { - .map = gb_gpio_irq_map, - .unmap = gb_gpio_irq_unmap, -}; - -/** - * gb_gpio_irqchip_remove() - removes an irqchip added to a gb_gpio_controller - * @ggc: the gb_gpio_controller to remove the irqchip from - * - * This is called only from gb_gpio_remove() - */ -static void gb_gpio_irqchip_remove(struct gb_gpio_controller *ggc) -{ - unsigned int offset; - - /* Remove all IRQ mappings and delete the domain */ - if (ggc->irqdomain) { - for (offset = 0; offset < (ggc->line_max + 1); offset++) - irq_dispose_mapping(irq_find_mapping(ggc->irqdomain, - offset)); - irq_domain_remove(ggc->irqdomain); - } - - if (ggc->irqchip) - ggc->irqchip = NULL; -} - -/** - * gb_gpio_irqchip_add() - adds an irqchip to a gpio chip - * @chip: the gpio chip to add the irqchip to - * @irqchip: the irqchip to add to the adapter - * @first_irq: if not dynamically assigned, the base (first) IRQ to - * allocate gpio irqs from - * @handler: the irq handler to use (often a predefined irq core function) - * @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE - * to have the core avoid setting up any default type in the hardware. - * - * This function closely associates a certain irqchip with a certain - * gpio chip, providing an irq domain to translate the local IRQs to - * global irqs, and making sure that the gpio chip - * is passed as chip data to all related functions. Driver callbacks - * need to use container_of() to get their local state containers back - * from the gpio chip passed as chip data. An irqdomain will be stored - * in the gpio chip that shall be used by the driver to handle IRQ number - * translation. The gpio chip will need to be initialized and registered - * before calling this function. - */ -static int gb_gpio_irqchip_add(struct gpio_chip *chip, - struct irq_chip *irqchip, - unsigned int first_irq, - irq_flow_handler_t handler, - unsigned int type) -{ - struct gb_gpio_controller *ggc; - unsigned int offset; - unsigned int irq_base; - - if (!chip || !irqchip) - return -EINVAL; - - ggc = gpio_chip_to_gb_gpio_controller(chip); - - ggc->irqchip = irqchip; - ggc->irq_handler = handler; - ggc->irq_default_type = type; - ggc->irqdomain = irq_domain_add_simple(NULL, - ggc->line_max + 1, first_irq, - &gb_gpio_domain_ops, chip); - if (!ggc->irqdomain) { - ggc->irqchip = NULL; - return -EINVAL; - } - - /* - * Prepare the mapping since the irqchip shall be orthogonal to - * any gpio calls. If the first_irq was zero, this is - * necessary to allocate descriptors for all IRQs. - */ - for (offset = 0; offset < (ggc->line_max + 1); offset++) { - irq_base = irq_create_mapping(ggc->irqdomain, offset); - if (offset == 0) - ggc->irq_base = irq_base; - } - - return 0; -} - -static int gb_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) -{ - struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip); - - return irq_find_mapping(ggc->irqdomain, offset); -} - static int gb_gpio_probe(struct gbphy_device *gbphy_dev, const struct gbphy_device_id *id) { @@ -693,7 +557,6 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev, gpio->get = gb_gpio_get; gpio->set = gb_gpio_set; gpio->set_config = gb_gpio_set_config; - gpio->to_irq = gb_gpio_to_irq; gpio->base = -1; /* Allocate base dynamically */ gpio->ngpio = ggc->line_max + 1; gpio->can_sleep = true; @@ -702,24 +565,24 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev, if (ret) goto exit_line_free; - ret = gb_gpio_irqchip_add(gpio, irqc, 0, - handle_level_irq, IRQ_TYPE_NONE); + ret = gpiochip_add(gpio); if (ret) { - dev_err(&gbphy_dev->dev, "failed to add irq chip: %d\n", ret); + dev_err(&gbphy_dev->dev, "failed to add gpio chip: %d\n", ret); goto exit_line_free; } - ret = gpiochip_add(gpio); + ret = gpiochip_irqchip_add(gpio, irqc, 0, handle_level_irq, + IRQ_TYPE_NONE); if (ret) { - dev_err(&gbphy_dev->dev, "failed to add gpio chip: %d\n", ret); - goto exit_gpio_irqchip_remove; + dev_err(&gbphy_dev->dev, "failed to add irq chip: %d\n", ret); + goto exit_gpiochip_remove; } gbphy_runtime_put_autosuspend(gbphy_dev); return 0; -exit_gpio_irqchip_remove: - gb_gpio_irqchip_remove(ggc); +exit_gpiochip_remove: + gpiochip_remove(gpio); exit_line_free: kfree(ggc->lines); exit_connection_disable: @@ -743,7 +606,6 @@ static void gb_gpio_remove(struct gbphy_device *gbphy_dev) gb_connection_disable_rx(connection); gpiochip_remove(&ggc->chip); - gb_gpio_irqchip_remove(ggc); gb_connection_disable(connection); gb_connection_destroy(connection); kfree(ggc->lines); -- 2.17.1

6 years, 8 months

[PATCH v2] staging: greybus: arche-apb-ctrl.c: Switch to the gpio descriptor interface

by Nishad Kamdar

Use the gpiod interface instead of the deprecated old non-descriptor interface. Signed-off-by: Nishad Kamdar <nishadkamdar(a)gmail.com> --- Changes in v2: - Resolved compilation errors. --- drivers/staging/greybus/arche-apb-ctrl.c | 159 +++++++++-------------- 1 file changed, 65 insertions(+), 94 deletions(-) diff --git a/drivers/staging/greybus/arche-apb-ctrl.c b/drivers/staging/greybus/arche-apb-ctrl.c index be5ffed90bcf..e887f6aee20b 100644 --- a/drivers/staging/greybus/arche-apb-ctrl.c +++ b/drivers/staging/greybus/arche-apb-ctrl.c @@ -8,9 +8,8 @@ #include <linux/clk.h> #include <linux/delay.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/interrupt.h> -#include <linux/of_gpio.h> #include <linux/of_irq.h> #include <linux/module.h> #include <linux/pinctrl/consumer.h> @@ -24,12 +23,12 @@ static void apb_bootret_deassert(struct device *dev); struct arche_apb_ctrl_drvdata { /* Control GPIO signals to and from AP <=> AP Bridges */ - int resetn_gpio; - int boot_ret_gpio; - int pwroff_gpio; - int wake_in_gpio; - int wake_out_gpio; - int pwrdn_gpio; + struct gpio_desc *resetn; + struct gpio_desc *boot_ret; + struct gpio_desc *pwroff; + struct gpio_desc *wake_in; + struct gpio_desc *wake_out; + struct gpio_desc *pwrdn; enum arche_platform_state state; bool init_disabled; @@ -37,28 +36,28 @@ struct arche_apb_ctrl_drvdata { struct regulator *vcore; struct regulator *vio; - int clk_en_gpio; + struct gpio_desc *clk_en; struct clk *clk; struct pinctrl *pinctrl; struct pinctrl_state *pin_default; /* V2: SPI Bus control */ - int spi_en_gpio; + struct gpio_desc *spi_en; bool spi_en_polarity_high; }; /* * Note that these low level api's are active high */ -static inline void deassert_reset(unsigned int gpio) +static inline void deassert_reset(struct gpio_desc *gpio) { - gpio_set_value(gpio, 1); + gpiod_set_value(gpio, 1); } -static inline void assert_reset(unsigned int gpio) +static inline void assert_reset(struct gpio_desc *gpio) { - gpio_set_value(gpio, 0); + gpiod_set_value(gpio, 0); } /* @@ -75,11 +74,11 @@ static int coldboot_seq(struct platform_device *pdev) return 0; /* Hold APB in reset state */ - assert_reset(apb->resetn_gpio); + assert_reset(apb->resetn); if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && - gpio_is_valid(apb->spi_en_gpio)) - devm_gpio_free(dev, apb->spi_en_gpio); + apb->spi_en) + devm_gpiod_put(dev, apb->spi_en); /* Enable power to APB */ if (!IS_ERR(apb->vcore)) { @@ -101,13 +100,13 @@ static int coldboot_seq(struct platform_device *pdev) apb_bootret_deassert(dev); /* On DB3 clock was not mandatory */ - if (gpio_is_valid(apb->clk_en_gpio)) - gpio_set_value(apb->clk_en_gpio, 1); + if (apb->clk_en) + gpiod_set_value(apb->clk_en, 1); usleep_range(100, 200); /* deassert reset to APB : Active-low signal */ - deassert_reset(apb->resetn_gpio); + deassert_reset(apb->resetn); apb->state = ARCHE_PLATFORM_STATE_ACTIVE; @@ -119,6 +118,7 @@ static int fw_flashing_seq(struct platform_device *pdev) struct device *dev = &pdev->dev; struct arche_apb_ctrl_drvdata *apb = platform_get_drvdata(pdev); int ret; + unsigned long flags; if (apb->init_disabled || apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING) @@ -136,25 +136,20 @@ static int fw_flashing_seq(struct platform_device *pdev) return ret; } - if (gpio_is_valid(apb->spi_en_gpio)) { - unsigned long flags; + if (apb->spi_en_polarity_high) + flags = GPIOD_OUT_HIGH; + else + flags = GPIOD_OUT_LOW; - if (apb->spi_en_polarity_high) - flags = GPIOF_OUT_INIT_HIGH; - else - flags = GPIOF_OUT_INIT_LOW; - - ret = devm_gpio_request_one(dev, apb->spi_en_gpio, - flags, "apb_spi_en"); - if (ret) { - dev_err(dev, "Failed requesting SPI bus en gpio %d\n", - apb->spi_en_gpio); - return ret; - } + apb->spi_en = devm_gpiod_get(dev, "gb,spi-en-gpio", flags); + if (IS_ERR(apb->spi_en)) { + ret = PTR_ERR(apb->spi_en); + dev_err(dev, "Failed requesting SPI bus en GPIO: %d\n", ret); + return ret; } /* for flashing device should be in reset state */ - assert_reset(apb->resetn_gpio); + assert_reset(apb->resetn); apb->state = ARCHE_PLATFORM_STATE_FW_FLASHING; return 0; @@ -177,8 +172,8 @@ static int standby_boot_seq(struct platform_device *pdev) return 0; if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && - gpio_is_valid(apb->spi_en_gpio)) - devm_gpio_free(dev, apb->spi_en_gpio); + apb->spi_en) + devm_gpiod_put(dev, apb->spi_en); /* * As per WDM spec, do nothing @@ -202,12 +197,12 @@ static void poweroff_seq(struct platform_device *pdev) return; if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && - gpio_is_valid(apb->spi_en_gpio)) - devm_gpio_free(dev, apb->spi_en_gpio); + apb->spi_en) + devm_gpiod_put(dev, apb->spi_en); /* disable the clock */ - if (gpio_is_valid(apb->clk_en_gpio)) - gpio_set_value(apb->clk_en_gpio, 0); + if (apb->clk_en) + gpiod_set_value(apb->clk_en, 0); if (!IS_ERR(apb->vcore) && regulator_is_enabled(apb->vcore) > 0) regulator_disable(apb->vcore); @@ -216,7 +211,7 @@ static void poweroff_seq(struct platform_device *pdev) regulator_disable(apb->vio); /* As part of exit, put APB back in reset state */ - assert_reset(apb->resetn_gpio); + assert_reset(apb->resetn); apb->state = ARCHE_PLATFORM_STATE_OFF; /* TODO: May have to send an event to SVC about this exit */ @@ -226,7 +221,7 @@ static void apb_bootret_deassert(struct device *dev) { struct arche_apb_ctrl_drvdata *apb = dev_get_drvdata(dev); - gpio_set_value(apb->boot_ret_gpio, 0); + gpiod_set_value(apb->boot_ret, 0); } int apb_ctrl_coldboot(struct device *dev) @@ -322,66 +317,46 @@ static int apb_ctrl_get_devtree_data(struct platform_device *pdev, struct arche_apb_ctrl_drvdata *apb) { struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; int ret; - apb->resetn_gpio = of_get_named_gpio(np, "reset-gpios", 0); - if (apb->resetn_gpio < 0) { - dev_err(dev, "failed to get reset gpio\n"); - return apb->resetn_gpio; - } - ret = devm_gpio_request_one(dev, apb->resetn_gpio, - GPIOF_OUT_INIT_LOW, "apb-reset"); - if (ret) { - dev_err(dev, "Failed requesting reset gpio %d\n", - apb->resetn_gpio); + apb->resetn = devm_gpiod_get(dev, "gb,reset-gpios", GPIOD_OUT_LOW); + if (IS_ERR(apb->resetn)) { + ret = PTR_ERR(apb->resetn); + dev_err(dev, "Failed requesting reset GPIO: %d\n", ret); return ret; } - apb->boot_ret_gpio = of_get_named_gpio(np, "boot-ret-gpios", 0); - if (apb->boot_ret_gpio < 0) { - dev_err(dev, "failed to get boot retention gpio\n"); - return apb->boot_ret_gpio; - } - ret = devm_gpio_request_one(dev, apb->boot_ret_gpio, - GPIOF_OUT_INIT_LOW, "boot retention"); - if (ret) { - dev_err(dev, "Failed requesting bootret gpio %d\n", - apb->boot_ret_gpio); + apb->boot_ret = devm_gpiod_get(dev, "gb,boot-ret-gpios", GPIOD_OUT_LOW); + if (IS_ERR(apb->boot_ret)) { + ret = PTR_ERR(apb->boot_ret); + dev_err(dev, "Failed requesting bootret GPIO: %d\n", ret); return ret; } /* It's not mandatory to support power management interface */ - apb->pwroff_gpio = of_get_named_gpio(np, "pwr-off-gpios", 0); - if (apb->pwroff_gpio < 0) { - dev_err(dev, "failed to get power off gpio\n"); - return apb->pwroff_gpio; - } - ret = devm_gpio_request_one(dev, apb->pwroff_gpio, - GPIOF_IN, "pwroff_n"); - if (ret) { - dev_err(dev, "Failed requesting pwroff_n gpio %d\n", - apb->pwroff_gpio); + apb->pwroff = devm_gpiod_get_optional(dev, "gb,pwr-off-gpios", + GPIOD_IN); + if (IS_ERR(apb->pwroff)) { + ret = PTR_ERR(apb->pwroff); + dev_err(dev, "Failed requesting pwroff_n GPIO: %d\n", ret); return ret; } /* Do not make clock mandatory as of now (for DB3) */ - apb->clk_en_gpio = of_get_named_gpio(np, "clock-en-gpio", 0); - if (apb->clk_en_gpio < 0) { - dev_warn(dev, "failed to get clock en gpio\n"); - } else if (gpio_is_valid(apb->clk_en_gpio)) { - ret = devm_gpio_request_one(dev, apb->clk_en_gpio, - GPIOF_OUT_INIT_LOW, "apb_clk_en"); - if (ret) { - dev_warn(dev, "Failed requesting APB clock en gpio %d\n", - apb->clk_en_gpio); - return ret; - } + apb->clk_en = devm_gpiod_get_optional(dev, "gb,clock-en-gpio", + GPIOD_OUT_LOW); + if (IS_ERR(apb->clk_en)) { + ret = PTR_ERR(apb->clk_en); + dev_err(dev, "Failed requesting APB clock en GPIO: %d\n", ret); + return ret; } - apb->pwrdn_gpio = of_get_named_gpio(np, "pwr-down-gpios", 0); - if (apb->pwrdn_gpio < 0) - dev_warn(dev, "failed to get power down gpio\n"); + apb->pwrdn = devm_gpiod_get(dev, "gb,pwr-down-gpios", GPIOD_OUT_LOW); + if (IS_ERR(apb->pwrdn)) { + ret = PTR_ERR(apb->pwrdn); + dev_warn(dev, "Failed requesting power down GPIO: %d\n", ret); + return ret; + } /* Regulators are optional, as we may have fixed supply coming in */ apb->vcore = devm_regulator_get(dev, "vcore"); @@ -404,12 +379,8 @@ static int apb_ctrl_get_devtree_data(struct platform_device *pdev, } /* Only applicable for platform >= V2 */ - apb->spi_en_gpio = of_get_named_gpio(np, "spi-en-gpio", 0); - if (apb->spi_en_gpio >= 0) { - if (of_property_read_bool(pdev->dev.of_node, - "spi-en-active-high")) - apb->spi_en_polarity_high = true; - } + if (of_property_read_bool(pdev->dev.of_node, "gb,spi-en-active-high")) + apb->spi_en_polarity_high = true; return 0; } -- 2.17.1

6 years, 8 months

[PATCH] staging: greybus: arche-apb-ctrl.c: Switch to the gpio descriptor interface

by Nishad Kamdar

Use the gpiod interface instead of the deprecated old non-descriptor interface. Signed-off-by: Nishad Kamdar <nishadkamdar(a)gmail.com> --- drivers/staging/greybus/arche-apb-ctrl.c | 158 ++++++++++------------- 1 file changed, 65 insertions(+), 93 deletions(-) diff --git a/drivers/staging/greybus/arche-apb-ctrl.c b/drivers/staging/greybus/arche-apb-ctrl.c index cc8d6fc831b4..fd19e2394c9c 100644 --- a/drivers/staging/greybus/arche-apb-ctrl.c +++ b/drivers/staging/greybus/arche-apb-ctrl.c @@ -8,9 +8,8 @@ #include <linux/clk.h> #include <linux/delay.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/interrupt.h> -#include <linux/of_gpio.h> #include <linux/of_irq.h> #include <linux/module.h> #include <linux/pinctrl/consumer.h> @@ -20,17 +19,16 @@ #include <linux/spinlock.h> #include "arche_platform.h" - static void apb_bootret_deassert(struct device *dev); struct arche_apb_ctrl_drvdata { /* Control GPIO signals to and from AP <=> AP Bridges */ - int resetn_gpio; - int boot_ret_gpio; - int pwroff_gpio; - int wake_in_gpio; - int wake_out_gpio; - int pwrdn_gpio; + struct gpio_desc *resetn; + struct gpio_desc *boot_ret; + struct gpio_desc *pwroff; + struct gpio_desc *wake_in; + struct gpio_desc *wake_out; + struct gpio_desc *pwrdn; enum arche_platform_state state; bool init_disabled; @@ -38,28 +36,28 @@ struct arche_apb_ctrl_drvdata { struct regulator *vcore; struct regulator *vio; - int clk_en_gpio; + struct gpio_desc *clk_en; struct clk *clk; struct pinctrl *pinctrl; struct pinctrl_state *pin_default; /* V2: SPI Bus control */ - int spi_en_gpio; + struct gpio_desc *spi_en; bool spi_en_polarity_high; }; /* * Note that these low level api's are active high */ -static inline void deassert_reset(unsigned int gpio) +static inline void deassert_reset(struct gpio_desc *gpio) { - gpio_set_value(gpio, 1); + gpiod_set_value(gpio, 1); } -static inline void assert_reset(unsigned int gpio) +static inline void assert_reset(struct gpio_desc *gpio) { - gpio_set_value(gpio, 0); + gpiod_set_value(gpio, 0); } /* @@ -76,11 +74,11 @@ static int coldboot_seq(struct platform_device *pdev) return 0; /* Hold APB in reset state */ - assert_reset(apb->resetn_gpio); + assert_reset(apb->resetn); if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && - gpio_is_valid(apb->spi_en_gpio)) - devm_gpio_free(dev, apb->spi_en_gpio); + apb->spi_en) + devm_gpiod_put(dev, apb->spi_en); /* Enable power to APB */ if (!IS_ERR(apb->vcore)) { @@ -102,13 +100,13 @@ static int coldboot_seq(struct platform_device *pdev) apb_bootret_deassert(dev); /* On DB3 clock was not mandatory */ - if (gpio_is_valid(apb->clk_en_gpio)) - gpio_set_value(apb->clk_en_gpio, 1); + if (apb->clk_en) + gpiod_set_value(apb->clk_en, 1); usleep_range(100, 200); /* deassert reset to APB : Active-low signal */ - deassert_reset(apb->resetn_gpio); + deassert_reset(apb->resetn); apb->state = ARCHE_PLATFORM_STATE_ACTIVE; @@ -120,6 +118,7 @@ static int fw_flashing_seq(struct platform_device *pdev) struct device *dev = &pdev->dev; struct arche_apb_ctrl_drvdata *apb = platform_get_drvdata(pdev); int ret; + unsigned long flags; if (apb->init_disabled || apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING) @@ -137,25 +136,20 @@ static int fw_flashing_seq(struct platform_device *pdev) return ret; } - if (gpio_is_valid(apb->spi_en_gpio)) { - unsigned long flags; - - if (apb->spi_en_polarity_high) - flags = GPIOF_OUT_INIT_HIGH; - else - flags = GPIOF_OUT_INIT_LOW; + if (apb->spi_en_polarity_high) + flags = GPIOD_OUT_HIGH; + else + flags = GPIOD_OUT_LOW; - ret = devm_gpio_request_one(dev, apb->spi_en_gpio, - flags, "apb_spi_en"); - if (ret) { - dev_err(dev, "Failed requesting SPI bus en gpio %d\n", - apb->spi_en_gpio); - return ret; - } + apb->spi_en = devm_gpiod_get(dev, "gb,apb_spi_en", flags); + if (IS_ERR(apb->spi_en)) { + ret = PTR_ERR(apb->spi_en); + dev_err(dev, "Failed requesting SPI bus en GPIO: %d\n", ret); + return ret; } /* for flashing device should be in reset state */ - assert_reset(apb->resetn_gpio); + assert_reset(apb->resetn); apb->state = ARCHE_PLATFORM_STATE_FW_FLASHING; return 0; @@ -178,8 +172,8 @@ static int standby_boot_seq(struct platform_device *pdev) return 0; if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && - gpio_is_valid(apb->spi_en_gpio)) - devm_gpio_free(dev, apb->spi_en_gpio); + apb->spi_en) + devm_gpiod_put(dev, apb->spi_en); /* * As per WDM spec, do nothing @@ -203,12 +197,12 @@ static void poweroff_seq(struct platform_device *pdev) return; if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && - gpio_is_valid(apb->spi_en_gpio)) - devm_gpio_free(dev, apb->spi_en_gpio); + apb->spi_en) + devm_gpiod_put(dev, apb->spi_en); /* disable the clock */ - if (gpio_is_valid(apb->clk_en_gpio)) - gpio_set_value(apb->clk_en_gpio, 0); + if (apb->clk_en) + gpiod_set_value(apb->clk_en, 0); if (!IS_ERR(apb->vcore) && regulator_is_enabled(apb->vcore) > 0) regulator_disable(apb->vcore); @@ -217,7 +211,7 @@ static void poweroff_seq(struct platform_device *pdev) regulator_disable(apb->vio); /* As part of exit, put APB back in reset state */ - assert_reset(apb->resetn_gpio); + assert_reset(apb->resetn); apb->state = ARCHE_PLATFORM_STATE_OFF; /* TODO: May have to send an event to SVC about this exit */ @@ -227,7 +221,7 @@ static void apb_bootret_deassert(struct device *dev) { struct arche_apb_ctrl_drvdata *apb = dev_get_drvdata(dev); - gpio_set_value(apb->boot_ret_gpio, 0); + gpiod_set_value(apb->boot_ret, 0); } int apb_ctrl_coldboot(struct device *dev) @@ -326,63 +320,44 @@ static int apb_ctrl_get_devtree_data(struct platform_device *pdev, struct device_node *np = dev->of_node; int ret; - apb->resetn_gpio = of_get_named_gpio(np, "reset-gpios", 0); - if (apb->resetn_gpio < 0) { - dev_err(dev, "failed to get reset gpio\n"); - return apb->resetn_gpio; - } - ret = devm_gpio_request_one(dev, apb->resetn_gpio, - GPIOF_OUT_INIT_LOW, "apb-reset"); - if (ret) { - dev_err(dev, "Failed requesting reset gpio %d\n", - apb->resetn_gpio); + apb->resetn = devm_gpiod_get(dev, "gb,reset-gpios", GPIOD_OUT_LOW); + if (IS_ERR(apb->resetn)) { + ret = PTR_ERR(apb->resetn); + dev_err(dev, "Failed requesting reset GPIO: %d\n", ret); return ret; } - apb->boot_ret_gpio = of_get_named_gpio(np, "boot-ret-gpios", 0); - if (apb->boot_ret_gpio < 0) { - dev_err(dev, "failed to get boot retention gpio\n"); - return apb->boot_ret_gpio; - } - ret = devm_gpio_request_one(dev, apb->boot_ret_gpio, - GPIOF_OUT_INIT_LOW, "boot retention"); - if (ret) { - dev_err(dev, "Failed requesting bootret gpio %d\n", - apb->boot_ret_gpio); + apb->boot_ret = devm_gpiod_get(dev, "gb,boot-ret-gpios", GPIOD_OUT_LOW); + if (IS_ERR(apb->boot_ret)) { + ret = PTR_ERR(apb->boot_ret); + dev_err(dev, "Failed requesting bootret GPIO: %d\n", ret); return ret; } /* It's not mandatory to support power management interface */ - apb->pwroff_gpio = of_get_named_gpio(np, "pwr-off-gpios", 0); - if (apb->pwroff_gpio < 0) { - dev_err(dev, "failed to get power off gpio\n"); - return apb->pwroff_gpio; - } - ret = devm_gpio_request_one(dev, apb->pwroff_gpio, - GPIOF_IN, "pwroff_n"); - if (ret) { - dev_err(dev, "Failed requesting pwroff_n gpio %d\n", - apb->pwroff_gpio); + apb->pwroff = devm_gpiod_get_optional(dev, "gb,pwr-off-gpios", + GPIOD_IN); + if (IS_ERR(apb->pwroff)) { + ret = PTR_ERR(apb->pwroff); + dev_err(dev, "Failed requesting pwroff_n GPIO: %d\n", ret); return ret; } /* Do not make clock mandatory as of now (for DB3) */ - apb->clk_en_gpio = of_get_named_gpio(np, "clock-en-gpio", 0); - if (apb->clk_en_gpio < 0) { - dev_warn(dev, "failed to get clock en gpio\n"); - } else if (gpio_is_valid(apb->clk_en_gpio)) { - ret = devm_gpio_request_one(dev, apb->clk_en_gpio, - GPIOF_OUT_INIT_LOW, "apb_clk_en"); - if (ret) { - dev_warn(dev, "Failed requesting APB clock en gpio %d\n", - apb->clk_en_gpio); - return ret; - } + apb->clk_en = devm_gpiod_get_optional(dev, "gb,clock-en-gpio", + GPIOD_OUT_LOW); + if (IS_ERR(apb->clk_en)) { + ret = PTR_ERR(apb->clk_en); + dev_err(dev, "Failed requesting APB clock en GPIO: %d\n", ret); + return ret; } - apb->pwrdn_gpio = of_get_named_gpio(np, "pwr-down-gpios", 0); - if (apb->pwrdn_gpio < 0) - dev_warn(dev, "failed to get power down gpio\n"); + apb->pwrdn = devm_gpiod_get(dev, "gb,pwr-down-gpios", GPIOD_OUT_LOW); + if (IF_ERR(apb->pwrdn)) { + ret = PTR_ERR(apb->pwrdn); + dev_warn(dev, "Failed requesting power down GPIO: %d\n", ret); + return ret; + } /* Regulators are optional, as we may have fixed supply coming in */ apb->vcore = devm_regulator_get(dev, "vcore"); @@ -405,11 +380,8 @@ static int apb_ctrl_get_devtree_data(struct platform_device *pdev, } /* Only applicable for platform >= V2 */ - apb->spi_en_gpio = of_get_named_gpio(np, "spi-en-gpio", 0); - if (apb->spi_en_gpio >= 0) { - if (of_property_read_bool(pdev->dev.of_node, - "spi-en-active-high")) - apb->spi_en_polarity_high = true; + if (of_property_read_bool(pdev->dev.of_node, "gb,spi-en-active-high")) + apb->spi_en_polarity_high = true; } return 0; -- 2.17.1

6 years, 8 months

[PATCH] greybus: gpio: switch GPIO portions to use GPIOLIB_IRQCHIP

by Nishad Kamdar

6 years, 9 months

[PATCH] greybus: gpio: switch GPIO portions to use GPIOLIB_IRQCHIP

by Nishad Kamdar

6 years, 9 months

[PATCH 1/3] staging: greybus: loopback.c: remove unused gb_loopback::lbid

by Rasmus Villemoes

It's not obvious how the code prevents adding more than 31 elements to the list and thus invoking undefined behaviour in the 1 << new_lbid expression, and in practice causing ->lbid values to repeat every 32 elements. But the definition of struct gb_loopback is local to loopback.c, and the lbid field is entirely unused outside of this function, so it seems we can just drop it entirely. Signed-off-by: Rasmus Villemoes <linux(a)rasmusvillemoes.dk> --- Since lbid isn't mentioned anywhere else in greybus/, it's hard to figure out how it was meant to be used. It does seem like entirely dead (write-only) code. drivers/staging/greybus/loopback.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c index 42f6f3de967c..7080294f705c 100644 --- a/drivers/staging/greybus/loopback.c +++ b/drivers/staging/greybus/loopback.c @@ -97,7 +97,6 @@ struct gb_loopback { u32 timeout_min; u32 timeout_max; u32 outstanding_operations_max; - u32 lbid; u64 elapsed_nsecs; u32 apbridge_latency_ts; u32 gbphy_latency_ts; @@ -1014,16 +1013,9 @@ static int gb_loopback_bus_id_compare(void *priv, struct list_head *lha, static void gb_loopback_insert_id(struct gb_loopback *gb) { - struct gb_loopback *gb_list; - u32 new_lbid = 0; - /* perform an insertion sort */ list_add_tail(&gb->entry, &gb_dev.list); list_sort(NULL, &gb_dev.list, gb_loopback_bus_id_compare); - list_for_each_entry(gb_list, &gb_dev.list, entry) { - gb_list->lbid = 1 << new_lbid; - new_lbid++; - } } #define DEBUGFS_NAMELEN 32 -- 2.19.0

6 years, 9 months

[PATCH] staging: greybus: control.c: fixed some coding style issues

by Aaron Williams

fixed some "Alignment should match open parenthesis" checks. Signing up for the kernel clean up crew while I learn C Signed-off-by: Aaron Williams <zero(a)zeroaptitude.com> --- drivers/staging/greybus/control.c | 39 +++++++++++++++---------------- 1 file changed, 19 insertions(+), 20 deletions(-) diff --git a/drivers/staging/greybus/control.c b/drivers/staging/greybus/control.c index 35f945a12b11..f8f0aee224c8 100644 --- a/drivers/staging/greybus/control.c +++ b/drivers/staging/greybus/control.c @@ -15,7 +15,6 @@ #define GB_CONTROL_VERSION_MAJOR 0 #define GB_CONTROL_VERSION_MINOR 1 - static int gb_control_get_version(struct gb_control *control) { struct gb_interface *intf = control->connection->intf; @@ -32,15 +31,15 @@ static int gb_control_get_version(struct gb_control *control) sizeof(response)); if (ret) { dev_err(&intf->dev, - "failed to get control-protocol version: %d\n", - ret); + "failed to get control-protocol version: %d\n", + ret); return ret; } if (response.major > request.major) { dev_err(&intf->dev, - "unsupported major control-protocol version (%u > %u)\n", - response.major, request.major); + "unsupported major control-protocol version (%u > %u)\n", + response.major, request.major); return -ENOTSUPP; } @@ -48,13 +47,13 @@ static int gb_control_get_version(struct gb_control *control) control->protocol_minor = response.minor; dev_dbg(&intf->dev, "%s - %u.%u\n", __func__, response.major, - response.minor); + response.minor); return 0; } static int gb_control_get_bundle_version(struct gb_control *control, - struct gb_bundle *bundle) + struct gb_bundle *bundle) { struct gb_interface *intf = control->connection->intf; struct gb_control_bundle_version_request request; @@ -69,8 +68,8 @@ static int gb_control_get_bundle_version(struct gb_control *control, &response, sizeof(response)); if (ret) { dev_err(&intf->dev, - "failed to get bundle %u class version: %d\n", - bundle->id, ret); + "failed to get bundle %u class version: %d\n", + bundle->id, ret); return ret; } @@ -78,7 +77,7 @@ static int gb_control_get_bundle_version(struct gb_control *control, bundle->class_minor = response.minor; dev_dbg(&intf->dev, "%s - %u: %u.%u\n", __func__, bundle->id, - response.major, response.minor); + response.major, response.minor); return 0; } @@ -112,7 +111,7 @@ int gb_control_get_manifest_size_operation(struct gb_interface *intf) NULL, 0, &response, sizeof(response)); if (ret) { dev_err(&connection->intf->dev, - "failed to get manifest size: %d\n", ret); + "failed to get manifest size: %d\n", ret); return ret; } @@ -168,7 +167,7 @@ int gb_control_disconnecting_operation(struct gb_control *control, ret = gb_operation_request_send_sync(operation); if (ret) { dev_err(&control->dev, "failed to send disconnecting: %d\n", - ret); + ret); } gb_operation_put(operation); @@ -400,7 +399,7 @@ int gb_control_interface_hibernate_abort(struct gb_control *control) } static ssize_t vendor_string_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { struct gb_control *control = to_gb_control(dev); @@ -409,7 +408,7 @@ static ssize_t vendor_string_show(struct device *dev, static DEVICE_ATTR_RO(vendor_string); static ssize_t product_string_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { struct gb_control *control = to_gb_control(dev); @@ -455,8 +454,8 @@ struct gb_control *gb_control_create(struct gb_interface *intf) connection = gb_connection_create_control(intf); if (IS_ERR(connection)) { dev_err(&intf->dev, - "failed to create control connection: %ld\n", - PTR_ERR(connection)); + "failed to create control connection: %ld\n", + PTR_ERR(connection)); kfree(control); return ERR_CAST(connection); } @@ -485,8 +484,8 @@ int gb_control_enable(struct gb_control *control) ret = gb_connection_enable_tx(control->connection); if (ret) { dev_err(&control->connection->intf->dev, - "failed to enable control connection: %d\n", - ret); + "failed to enable control connection: %d\n", + ret); return ret; } @@ -547,8 +546,8 @@ int gb_control_add(struct gb_control *control) ret = device_add(&control->dev); if (ret) { dev_err(&control->dev, - "failed to register control device: %d\n", - ret); + "failed to register control device: %d\n", + ret); return ret; } -- 2.17.1

6 years, 10 months

[PATCH] staging: greybus: fix spelling mistake "entires" -> "entries"

by Colin King

From: Colin Ian King <colin.king(a)canonical.com> Trivial fix to spelling mistake Signed-off-by: Colin Ian King <colin.king(a)canonical.com> --- drivers/staging/greybus/tools/README.loopback | 2 +- drivers/staging/greybus/tools/loopback_test.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/greybus/tools/README.loopback b/drivers/staging/greybus/tools/README.loopback index 845b08dc4696..070a510cbe7c 100644 --- a/drivers/staging/greybus/tools/README.loopback +++ b/drivers/staging/greybus/tools/README.loopback @@ -79,7 +79,7 @@ Here is the summary of the available options: -t must be one of the test names - sink, transfer or ping -i iteration count - the number of iterations to run the test over Optional arguments - -S sysfs location - location for greybus 'endo' entires default /sys/bus/greybus/devices/ + -S sysfs location - location for greybus 'endo' entries default /sys/bus/greybus/devices/ -D debugfs location - location for loopback debugfs entries default /sys/kernel/debug/gb_loopback/ -s size of data packet to send during test - defaults to zero -m mask - a bit mask of connections to include example: -m 8 = 4th connection -m 9 = 1st and 4th connection etc diff --git a/drivers/staging/greybus/tools/loopback_test.c b/drivers/staging/greybus/tools/loopback_test.c index b82e2befe935..2fa88092514d 100644 --- a/drivers/staging/greybus/tools/loopback_test.c +++ b/drivers/staging/greybus/tools/loopback_test.c @@ -192,7 +192,7 @@ void usage(void) " -t must be one of the test names - sink, transfer or ping\n" " -i iteration count - the number of iterations to run the test over\n" " Optional arguments\n" - " -S sysfs location - location for greybus 'endo' entires default /sys/bus/greybus/devices/\n" + " -S sysfs location - location for greybus 'endo' entries default /sys/bus/greybus/devices/\n" " -D debugfs location - location for loopback debugfs entries default /sys/kernel/debug/gb_loopback/\n" " -s size of data packet to send during test - defaults to zero\n" " -m mask - a bit mask of connections to include example: -m 8 = 4th connection -m 9 = 1st and 4th connection etc\n" -- 2.17.1

6 years, 10 months

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