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4332 discussions

by Daniel Lezcano

Hi, I am not succeeding to make ethernet to work on a 3.3-rc6 for the snowball. I noticed the same problem occured a few versions ago and was fixed [1]. But it seems some modification around the fix location was made for the 3.3 and perhaps resulted on a new regression. Was this problem already spotted for this version ? Is there a patch in this case ? Thanks -- Daniel [1] https://bugs.launchpad.net/linaro-landing-team-ste/+bug/804209 -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro:<http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog

13 years, 3 months

[PATCH v5 0/4] common clk framework

by Mike Turquette

From: Mike Turquette <mturquette(a)ti.com> The common clock framework defines a common struct clk as well as an implementation of the clk api that unifies clock operations on various platforms and devices. The net result is consolidation of many different struct clk definitions and platform-specific clock framework implementations. I consider this version merge-worthy pending ACKs from the relevant maintainers; namely Russell, Thomas and the platform folks interested in porting to this framework. I would like to thank everyone who participated in the common clk sessions at Linaro Connect and ELC; the feedback was invaluable. Also I would like to thank Shawn Guo, Richard Zhao, Saravana Kannan and Magnus Damm for tirelessly updating their platforms for the last few revisions of this patch series and providng excellent feedback each time. Major changes since v4: * rolled in TGLX's comments on overall design. We now have, * proper handling of root clocks and orphan clocks * multi-parent clocks are handled in the core * struct clk is shielded from struct clk_foo and vice versa * this is a return to the previous struct clk_hw design * split basic clock types out into separate files * split headers up by purpose * clk.h remains the driver-level interface * declarations for rate change notifiers are the only additions * clk-provider.h is primary header for implementing clock operations * clk-private.h allows for static initialization of clock data * validation and bug fixes * rebased onto Linus' v3.3-rc5 tag Patches can be pulled from: git://git.linaro.org/people/mturquette/linux.git v3.3-rc5-clkv5 v4 can be found at, http://article.gmane.org/gmane.linux.linaro.devel/8896/ v3 can be found at, http://article.gmane.org/gmane.linux.kernel/1218622 Mike Turquette (4): Documentation: common clk API clk: Kconfig: add entry for HAVE_CLK_PREPARE clk: introduce the common clock framework clk: basic clock hardware types Documentation/clk.txt | 201 +++++++ drivers/clk/Kconfig | 31 + drivers/clk/Makefile | 2 + drivers/clk/clk-divider.c | 199 +++++++ drivers/clk/clk-fixed-rate.c | 81 +++ drivers/clk/clk-gate.c | 121 ++++ drivers/clk/clk-mux.c | 114 ++++ drivers/clk/clk.c | 1323 ++++++++++++++++++++++++++++++++++++++++++ include/linux/clk-private.h | 192 ++++++ include/linux/clk-provider.h | 294 ++++++++++ include/linux/clk.h | 68 ++- 11 files changed, 2621 insertions(+), 5 deletions(-) create mode 100644 Documentation/clk.txt create mode 100644 drivers/clk/clk-divider.c create mode 100644 drivers/clk/clk-fixed-rate.c create mode 100644 drivers/clk/clk-gate.c create mode 100644 drivers/clk/clk-mux.c create mode 100644 drivers/clk/clk.c create mode 100644 include/linux/clk-private.h create mode 100644 include/linux/clk-provider.h Cc: Jeremy Kerr <jeremy.kerr(a)canonical.com> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Arnd Bergman <arnd.bergmann(a)linaro.org> Cc: Paul Walmsley <paul(a)pwsan.com> Cc: Shawn Guo <shawn.guo(a)freescale.com> Cc: Richard Zhao <richard.zhao(a)linaro.org> Cc: Saravana Kannan <skannan(a)codeaurora.org> Cc: Magnus Damm <magnus.damm(a)gmail.com> Cc: Rob Herring <rob.herring(a)calxeda.com> Cc: Mark Brown <broonie(a)opensource.wolfsonmicro.com> Cc: Linus Walleij <linus.walleij(a)stericsson.com> Cc: Stephen Boyd <sboyd(a)codeaurora.org> Cc: Amit Kucheria <amit.kucheria(a)linaro.org> Cc: Deepak Saxena <dsaxena(a)linaro.org> Cc: Grant Likely <grant.likely(a)secretlab.ca> Cc: Andrew Lunn <andrew(a)lunn.ch> -- 1.7.5.4

13 years, 3 months

Re: Linux kernel with rpmsg and possibility for compiling powervr drivers

by Martin Ertsas (mertsas)

Sent from Samsung MobileAndy Green <andy.green(a)linaro.org> wrote:On 03/16/2012 10:46 PM, Somebody in the thread at some point said: > If you look at tilt-android-tracking, there is a complete 1.8 SGX > (usable on ICS) on fairly recent basis which includes its own rpmsg > stack as part of the SGX port. The matching userlands are available via > google AOSP. > > http://git.linaro.org/gitweb?p=landing-teams/working/ti/kernel.git;a=shortl… > > We also have what's currently only working on > > > I was a bit unclear. Sorry. First, we are thinking of using Linux for > this task instead of Android. We want rpmsg support to get access to the > m3 devices for h264 encoding and decoding. with pvr I basically meant a > dss which can be used to compile rsalvetis pvr omap 4 kernel module. Bit unclear is an understatement in this case ^^ rpmsg is a complete red herring then. 1.7 SGX as currently used in Ubuntu does not use rpmsg. All the currently available mm decode solutions for Ubuntu don't use it yet either, they use its predecessor "syslink". If you check out tilt-3.1 branch from our repo that has working syslink + tiler pieces needed by the mm decode pieces in Ubuntu and will build against SGX dkms. -Andy -- Andy Green | TI Landing Team Leader Linaro.org │ Open source software for ARM SoCs | Follow Linaro http://facebook.com/pages/Linaro/155974581091106 - http://twitter.com/#!/linaroorg - http://linaro.org/linaro-blog So what you are basically saying is forget rpmsg for the time being? Do you know if gst-ducati works with syslink then? thank you so much for your help so far.

13 years, 3 months

Slow/broken USB and Ethernet on Snowballs/Origen boards?

by Jannis Pohlmann

Hi, I am currently playing with a couple of the development boards for which there are Linaro hwpacks and LEBs. Since what I am trying to do requires a lot of disk and network I/O, I've been paying special attention to the data transfer rates I can get out of these boards. Below is a brief summary of my findings. 1) i.MX 53 * disk I/O using an external SSD drive is very good; good enough to not require further measurements * network I/O is approximately 9-10 MByte/s (perhaps more) which seems ok given the 100 MBit/s Ethernet interface 2) Snowball (PDK, version 8) * it seems to be impossible to get the USB OTG host mode to work, therefore I could not test disk I/O with a USB drive; it appears the OTG port on the version 8 board does not even have enough power for a powered USB to actually go online (I am unaware of the details of how this works unfortunately) * performing network I/O with netcat casues netcat, ksoftirqd and kworker to use ~33% of the CPU each, resulting in 100% CPU usage only to handle the network data transfer * the resulting network transfer rate is about 5.5 MByte/s, which is significantly less than what the 100 MBit/s Ethernet interface should be able to produce 3) Origen * the internal USB hub runs at Full Speed (12 MBit/s), resulting in a maximum USB disk I/O of 1.5 MByte/s * since the board does not feature Ethernet itself, I tried to attach a USB Ethernet controller to it, but of course the transfer rate through that is by the I/O upper limit of the USB hub * I did not test wireless but it is not feasible for what I am trying to do anyway I guess not all of this is surprising. The i.MX performs quite well but unfortunately the CPU is quite slow compared to the others. However, I wonder whether the USB OTG host mode issue on the Snowball is a known problem? Also, network I/O occupying all of the CPU seems to be a bug or at least a dodgy driver. About the Origen: I assume there is nothing that can be done to have High Speed USB on it? Thanks in advance! If anyone needs me to provide more information, I'll gladly try to do that. Regards, Jannis

13 years, 3 months

Flame graphs - cool perf visualisation

by Amit Kucheria

For those who don't follow LWN regularly: http://dtrace.org/blogs/brendan/2012/03/17/linux-kernel-performance-flame-g… This could be useful for tracking performance bottlenecks.

13 years, 3 months

Linaro GCC 4.6 entering maintenance; 4.5 end of life

by Michael Hope

This is the first announcement on upcoming changes to the supported Linaro GCC versions. GCC 4.7 is expected out in the next two weeks. We plan to switch to 4.7 for the Linaro GCC 2012.04 release and, as part of that, will put Linaro GCC 4.6 into maintenance and retire Linaro GCC 4.5. While in maintenance we will continue to update, fix bugs, and do releases on 4.6. No further changes or releases will be made to 4.5. All historical releases and branches will stay available. For more informatio, please see the flyer at: https://wiki.linaro.org/WorkingGroups/ToolChain/Flyer especially the section on Lifecycle: https://wiki.linaro.org/WorkingGroups/ToolChain/Flyer#Lifecycle The formal change notes will be sent after the 2012.04 release. -- Michael

13 years, 3 months

[Patch 07/07] Touch: DA9052/53 touch screen driver v1

by Ashish Jangam

This driver adds support for DA9052/53 4-wire resistive ADC interfaced touchscreen controller. DA9052/53 is a MFD therefore this driver depends on DA9052/53 core driver for core functionalities. This patch is functionally tested on Samsung SMDKV6410. Signed-off-by: David Dajun Chen <dchen(a)diasemi.com> Signed-off-by: Ashish Jangam <ashish.jangam(a)kpitcummins.com> --- drivers/input/touchscreen/Kconfig | 7 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/da9052_tsi.c | 353 ++++++++++++++++++++++++++++++++ 3 files changed, 361 insertions(+), 0 deletions(-) create mode 100644 drivers/input/touchscreen/da9052_tsi.c diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 2b21a70..32a3e26 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -187,6 +187,13 @@ config TOUCHSCREEN_DA9034 Say Y here to enable the support for the touchscreen found on Dialog Semiconductor DA9034 PMIC. +config TOUCHSCREEN_DA9052 + tristate "Dialog DA9052/DA9053 TSI" + depends on PMIC_DA9052 + help + Say y here to support the touchscreen found on Dialog Semiconductor + DA9052-BC and DA9053-AA/Bx PMICs. + config TOUCHSCREEN_DYNAPRO tristate "Dynapro serial touchscreen" select SERIO diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index d9acbdc..c76b21c 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI) += cyttsp_spi.o obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o +obj-$(CONFIG_TOUCHSCREEN_DA9052) += da9052_tsi.o obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o diff --git a/drivers/input/touchscreen/da9052_tsi.c b/drivers/input/touchscreen/da9052_tsi.c new file mode 100644 index 0000000..8c672ee --- /dev/null +++ b/drivers/input/touchscreen/da9052_tsi.c @@ -0,0 +1,353 @@ +/* + * TSI driver for Dialog DA9052 + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen <dchen(a)diasemi.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ +#include <linux/module.h> +#include <linux/input.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> + +#include <linux/mfd/da9052/reg.h> +#include <linux/mfd/da9052/da9052.h> + +#define TSI_PEN_DOWN_STATUS 0x40 + +struct da9052_tsi { + struct da9052 *da9052; + struct input_dev *dev; + struct delayed_work ts_pen_work; + int irq_pendwn; + int irq_datardy; +}; + +static int da9052_ts_start(struct da9052_tsi *tsi) +{ + return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, + 1 << 0, 1 << 0); +} + +static int da9052_ts_stop(struct da9052_tsi *tsi) +{ + return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 0, 0); +} + +static irqreturn_t da9052_ts_pendwn_irq(int irq, void *data) +{ + struct da9052_tsi *tsi = data; + + /* Mask PEN_DOWN event and unmask TSI_READY event */ + disable_irq_nosync(tsi->irq_pendwn); + enable_irq(tsi->irq_datardy); + + da9052_ts_start(tsi); + + input_report_key(tsi->dev, BTN_TOUCH, 1); + input_sync(tsi->dev); + + schedule_delayed_work(&tsi->ts_pen_work, HZ/50); + + return IRQ_HANDLED; +} + +static int da9052_ts_read(struct da9052_tsi *tsi) +{ + int ret = 0; + u16 x, y, z; + u8 v; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG); + if (ret < 0) + goto exit; + + x = (u16) ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG); + if (ret < 0) + goto exit; + + y = (u16) ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG); + if (ret < 0) + goto exit; + + z = (u16) ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG); + if (ret < 0) + goto exit; + + v = (u8) ret; + + x = ((x << 2) & 0x3fc) | (v & 0x3); + y = ((y << 2) & 0x3fc) | ((v & 0xc) >> 2); + z = ((z << 2) & 0x3fc) | ((v & 0x30) >> 4); + + input_report_abs(tsi->dev, ABS_X, x); + input_report_abs(tsi->dev, ABS_Y, y); + input_report_abs(tsi->dev, ABS_PRESSURE, z); + input_report_key(tsi->dev, BTN_TOUCH, 1); + input_sync(tsi->dev); + +exit: + return ret; +} + +static irqreturn_t da9052_ts_datardy_irq(int irq, void *data) +{ + struct da9052_tsi *tsi = data; + + da9052_ts_read(tsi); + return IRQ_HANDLED; +} + +static void da9052_ts_pen_work(struct work_struct *work) +{ + struct da9052_tsi *tsi = container_of(work, struct da9052_tsi, + ts_pen_work.work); + struct input_dev *ip_dev = tsi->dev; + int ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG); + if (ret < 0) + return; + + if (ret & TSI_PEN_DOWN_STATUS) /* Pen Down */ + schedule_delayed_work(&tsi->ts_pen_work, HZ/50); + else { + /* Pen UP */ + da9052_ts_stop(tsi); + + /* Mask TSI_READY event and unmask PEN_DOWN event */ + disable_irq(tsi->irq_datardy); + enable_irq(tsi->irq_pendwn); + + /* Report Pen UP */ + input_report_abs(ip_dev, ABS_PRESSURE, 0); + input_report_key(ip_dev, BTN_TOUCH, 0); + input_sync(ip_dev); + } +} + +static int __devinit da9052_ts_configure_gpio(struct da9052 *da9052) +{ + int ret; + + ret = da9052_reg_update(da9052, DA9052_GPIO_2_3_REG, 0x30, 0); + if (ret < 0) + return ret; + + ret = da9052_reg_update(da9052, DA9052_GPIO_4_5_REG, 0x33, 0); + if (ret < 0) + return ret; + + ret = da9052_reg_update(da9052, DA9052_GPIO_6_7_REG, 0x33, 0); + + return ret; +} + +static int __devinit da9052_configure_tsi(struct da9052_tsi *tsi) +{ + ssize_t ret; + + ret = da9052_ts_configure_gpio(tsi->da9052); + if (ret < 0) + return ret; + + /* Measure TSI sample every 1ms */ + ret = da9052_reg_update(tsi->da9052, DA9052_ADC_CONT_REG, + 1 << 6, 1 << 6); + if (ret < 0) + return ret; + + /* TSI_DELAY: 3 slots, TSI_SKIP: 0 slots, TSI_MODE: XYZP */ + ret = da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 0xFC, 0xC0); + if (ret < 0) + return ret; + + /* Mask PEN_DOWN and TSI_READY events */ + disable_irq(tsi->irq_pendwn); + disable_irq(tsi->irq_datardy); + + /*Supply TSIRef through LD09 */ + ret = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x59); + + return ret; +} + +static int da9052_ts_input_open(struct input_dev *input_dev) +{ + struct da9052_tsi *tsi = input_get_drvdata(input_dev); + + /* Unmask PEN_DOWN event */ + enable_irq(tsi->irq_pendwn); + + /* Enable Pen Detect Circuit */ + return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, + 1 << 1, 1 << 1); +} + +static void da9052_ts_input_close(struct input_dev *input_dev) +{ + struct da9052_tsi *tsi = input_get_drvdata(input_dev); + int ret; + + ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG); + + if (ret & TSI_PEN_DOWN_STATUS) /* Pen Down */ + disable_irq(tsi->irq_datardy); + else + disable_irq(tsi->irq_pendwn); + + cancel_delayed_work_sync(&tsi->ts_pen_work); + + da9052_ts_stop(tsi); + + /* Disable Pen Detect Circuit */ + da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0); +} + +static int __devinit da9052_ts_probe(struct platform_device *pdev) +{ + struct da9052_tsi *tsi; + struct input_dev *input_dev; + struct da9052 *da9052; + int ret; + + da9052 = dev_get_drvdata(pdev->dev.parent); + if (da9052 == NULL) + return -EINVAL; + + tsi = devm_kzalloc(&pdev->dev, sizeof(struct da9052_tsi), GFP_KERNEL); + if (!tsi) + return -ENOMEM; + + input_dev = input_allocate_device(); + if (!input_dev) { + dev_err(tsi->da9052->dev, "Failed to allocate input device\n"); + ret = -ENOMEM; + goto err_mem; + } + + INIT_DELAYED_WORK(&tsi->ts_pen_work, da9052_ts_pen_work); + + tsi->da9052 = da9052; + + input_dev->id.version = 0x0101; + input_dev->id.vendor = 0x15B6; + input_dev->id.product = 0x9052; + input_dev->name = "Dialog DA9052 TouchScreen Driver"; + input_dev->dev.parent = &pdev->dev; + input_dev->open = da9052_ts_input_open; + input_dev->close = da9052_ts_input_close; + __set_bit(EV_ABS, input_dev->evbit); + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(BTN_TOUCH, input_dev->keybit); + + input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0); + input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0); + input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1023, 0, 0); + + tsi->dev = input_dev; + input_set_drvdata(input_dev, tsi); + + tsi->irq_pendwn = platform_get_irq_byname(pdev, "PENDWN"); + if (tsi->irq_pendwn < 0) { + ret = tsi->irq_pendwn; + goto err_input; + } + + ret = request_threaded_irq(tsi->irq_pendwn, NULL, da9052_ts_pendwn_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "PENDWN", tsi); + if (ret < 0) { + dev_err(tsi->da9052->dev, + "Failed to register %s IRQ %d, error = %d\n", "PENDWN", + tsi->irq_pendwn, ret); + goto err_input; + } + + tsi->irq_datardy = platform_get_irq_byname(pdev, "TSIRDY"); + if (tsi->irq_datardy < 0) { + ret = tsi->irq_datardy; + goto err_pendwn_irq; + } + + ret = request_threaded_irq(tsi->irq_datardy, NULL, + da9052_ts_datardy_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "TSIRDY", tsi); + if (ret < 0) { + dev_err(tsi->da9052->dev, + "Failed to register %s IRQ %d, error = %d\n", "TSIRDY", + tsi->irq_datardy, ret); + goto err_pendwn_irq; + } + + ret = da9052_configure_tsi(tsi); + if (ret < 0) + goto err_datardy_irq; + + ret = input_register_device(tsi->dev); + if (ret < 0) + goto err_datardy_irq; + + platform_set_drvdata(pdev, tsi); + + return 0; + +err_datardy_irq: + free_irq(tsi->irq_datardy, tsi); +err_pendwn_irq: + free_irq(tsi->irq_pendwn, tsi); +err_input: + input_free_device(input_dev); +err_mem: + devm_kfree(&pdev->dev, tsi); + return ret; +} + +static int __devexit da9052_ts_remove(struct platform_device *pdev) +{ + struct da9052_tsi *tsi = platform_get_drvdata(pdev); + + da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x19); + + free_irq(tsi->irq_pendwn, tsi); + free_irq(tsi->irq_datardy, tsi); + + input_unregister_device(tsi->dev); + + platform_set_drvdata(pdev, NULL); + + devm_kfree(&pdev->dev, tsi); + + return 0; +} + +static struct platform_driver da9052_tsi_driver = { + + .probe = da9052_ts_probe, + .remove = __devexit_p(da9052_ts_remove), + .driver = { + .name = "da9052-tsi", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9052_tsi_driver); + +MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052"); +MODULE_AUTHOR("David Dajun Chen <dchen(a)diasemi.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-tsi");

13 years, 3 months

[PATCH 02/02] HWMON: HWMON driver for DA9052/53 PMIC v4

by Ashish Jangam

The DA9052 PMIC provides an Analogue to Digital Converter with 10 bits resolution and 10 channels. This patch monitors the DA9052 PMIC's ADC channels mostly for battery parameters like battery temperature, junction temperature, battery current etc. This patch is functionally tested on Samsung SMDKV6410 Signed-off-by: David Dajun Chen <dchen(a)diasemi.com> Signed-off-by: Ashish Jangam <ashish.jangam(a)kpitcummins.com> --- Changes since V3 - Add DIV_ROUND_CLOSEST() macro Changes since v2 - Update documentation file Changes since v1 - Update documentation file for url - Modify the entry in Kconfig file - Correct reporting of junction temperature - Add conversion function for backup battery voltage - Change labels for temperatures in the device attributes to follow sensor index --- Documentation/hwmon/da9052 | 61 ++++++++ drivers/hwmon/Kconfig | 10 ++ drivers/hwmon/Makefile | 1 + drivers/hwmon/da9052-hwmon.c | 344 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 416 insertions(+), 0 deletions(-) create mode 100644 Documentation/hwmon/da9052 create mode 100644 drivers/hwmon/da9052-hwmon.c diff --git a/Documentation/hwmon/da9052 b/Documentation/hwmon/da9052 new file mode 100644 index 0000000..ef89855 --- /dev/null +++ b/Documentation/hwmon/da9052 @@ -0,0 +1,61 @@ +Supported chips: + * Dialog Semiconductors DA9052-BC and DA9053-AA/Bx PMICs + Prefix: 'da9052' + Datasheet: Datasheet is not publicly available. + +Authors: David Dajun Chen <dchen(a)diasemi.com> + +Description +----------- + +The DA9052/53 provides an Analogue to Digital Converter (ADC) with 10 bits +resolution and track and hold circuitry combined with an analogue input +multiplexer. The analogue input multiplexer will allow conversion of up to 10 +different inputs. The track and hold circuit ensures stable input voltages at +the input of the ADC during the conversion. + +The ADC is used to measure the following inputs: +Channel 0: VDDOUT - measurement of the system voltage +Channel 1: ICH - internal battery charger current measurement +Channel 2: TBAT - output from the battery NTC +Channel 3: VBAT - measurement of the battery voltage +Channel 4: ADC_IN4 - high impedance input (0 - 2.5V) +Channel 5: ADC_IN5 - high impedance input (0 - 2.5V) +Channel 6: ADC_IN6 - high impedance input (0 - 2.5V) +Channel 7: XY - TSI interface to measure the X and Y voltage of the touch + screen resistive potentiometers +Channel 8: Internal Tjunc. - sense (internal temp. sensor) +Channel 9: VBBAT - measurement of the backup battery voltage + +By using sysfs attributes we can measure the system voltage VDDOUT, the battery +charging current ICH, battery temperature TBAT, battery junction temperature +TJUNC, battery voltage VBAT and the back up battery voltage VBBAT. + +Voltage Monitoring +------------------ + +Voltages are sampled by a 10 bit ADC. + +The battery voltage is calculated as: + Milli volt = ((ADC value * 1000) / 512) + 2500 + +The backup battery voltage is calculated as: + Milli volt = (ADC value * 2500) / 512; + +The voltages on ADC channels 4, 5 and 6 are calculated as: + Milli volt = (ADC value * 2500) / 1023 + +Temperature Monitoring +---------------------- + +Temperatures are sampled by a 10 bit ADC. Junction and battery temperatures +are monitored by the ADC channels. + +The junction temperature is calculated: + Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8 +The junction temperature attribute is supported by the driver. + +The battery temperature is calculated: + Degree Celcius = 1 / (t1 + 1/298)- 273 +where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255)) +Default values of R25, B, ITBAT are 10e3, 3380 and 50e-6 respectively. diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 12bc500..5549c5b 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -313,6 +313,16 @@ config SENSORS_DS1621 This driver can also be built as a module. If so, the module will be called ds1621. +config SENSORS_DA9052_ADC + tristate "Dialog DA9052/DA9053 ADC" + depends on PMIC_DA9052 + help + Say y here to support the ADC found on Dialog Semiconductor + DA9052-BC and DA9053-AA/Bx PMICs. + + This driver can also be built as module. If so, the module + will be called da9052-hwmon. + config SENSORS_EXYNOS4_TMU tristate "Temperature sensor on Samsung EXYNOS4" depends on ARCH_EXYNOS4 diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 6d3f11f..a950362 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o +obj-$(CONFIG_SENSORS_DA9052_ADC)+= da9052-hwmon.o obj-$(CONFIG_SENSORS_DME1737) += dme1737.o obj-$(CONFIG_SENSORS_DS620) += ds620.o obj-$(CONFIG_SENSORS_DS1621) += ds1621.o diff --git a/drivers/hwmon/da9052-hwmon.c b/drivers/hwmon/da9052-hwmon.c new file mode 100644 index 0000000..7d356a9 --- /dev/null +++ b/drivers/hwmon/da9052-hwmon.c @@ -0,0 +1,344 @@ +/* + * HWMON Driver for Dialog DA9052 + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen <dchen(a)diasemi.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/platform_device.h> + +#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> + +struct da9052_hwmon { + struct da9052 *da9052; + struct device *class_device; + struct mutex hwmon_lock; +}; + +static const char * const input_names[] = { + [DA9052_ADC_VDDOUT] = "VDDOUT", + [DA9052_ADC_ICH] = "CHARGING CURRENT", + [DA9052_ADC_TBAT] = "BATTERY TEMP", + [DA9052_ADC_VBAT] = "BATTERY VOLTAGE", + [DA9052_ADC_IN4] = "ADC IN4", + [DA9052_ADC_IN5] = "ADC IN5", + [DA9052_ADC_IN6] = "ADC IN6", + [DA9052_ADC_TJUNC] = "BATTERY JUNCTION TEMP", + [DA9052_ADC_VBBAT] = "BACK-UP BATTERY VOLTAGE", +}; + +/* Conversion function for VDDOUT and VBAT */ +static inline int volt_reg_to_mV(int value) +{ + return DIV_ROUND_CLOSEST(value * 1000, 512) + 2500; +} + +/* Conversion function for ADC channels 4, 5 and 6 */ +static inline int input_reg_to_mV(int value) +{ + return DIV_ROUND_CLOSEST(value * 2500, 1023); +} + +/* Conversion function for VBBAT */ +static inline int vbbat_reg_to_mV(int value) +{ + return DIV_ROUND_CLOSEST(value * 2500, 512); +} + +static int da9052_enable_vddout_channel(struct da9052 *da9052) +{ + int ret; + + ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG); + if (ret < 0) + return ret; + + ret |= DA9052_ADCCONT_AUTOVDDEN; + + return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret); +} + +static int da9052_disable_vddout_channel(struct da9052 *da9052) +{ + int ret; + + ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG); + if (ret < 0) + return ret; + + ret &= ~DA9052_ADCCONT_AUTOVDDEN; + + return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret); +} + +static ssize_t da9052_read_vddout(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct da9052_hwmon *hwmon = dev_get_drvdata(dev); + int ret, vdd; + + mutex_lock(&hwmon->hwmon_lock); + + ret = da9052_enable_vddout_channel(hwmon->da9052); + if (ret < 0) + goto hwmon_err; + + vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG); + if (vdd < 0) { + ret = vdd; + goto hwmon_err_release; + } + + ret = da9052_disable_vddout_channel(hwmon->da9052); + if (ret < 0) + goto hwmon_err; + + mutex_unlock(&hwmon->hwmon_lock); + return sprintf(buf, "%d\n", volt_reg_to_mV(vdd)); + +hwmon_err_release: + da9052_disable_vddout_channel(hwmon->da9052); +hwmon_err: + mutex_unlock(&hwmon->hwmon_lock); + return ret; +} + +static ssize_t da9052_read_ich(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct da9052_hwmon *hwmon = dev_get_drvdata(dev); + int ret; + + ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG); + if (ret < 0) + return ret; + + /* Equivalent to 3.9mA/bit in register ICHG_AV */ + return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10)); +} + +static ssize_t da9052_read_tbat(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct da9052_hwmon *hwmon = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052)); +} + +static ssize_t da9052_read_vbat(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct da9052_hwmon *hwmon = dev_get_drvdata(dev); + int ret; + + ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", volt_reg_to_mV(ret)); +} + +static ssize_t da9052_read_misc_channel(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct da9052_hwmon *hwmon = dev_get_drvdata(dev); + int channel = to_sensor_dev_attr(devattr)->index; + int ret; + + ret = da9052_adc_manual_read(hwmon->da9052, channel); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", input_reg_to_mV(ret)); +} + +static ssize_t da9052_read_tjunc(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct da9052_hwmon *hwmon = dev_get_drvdata(dev); + int tjunc; + int toffset; + + tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG); + if (tjunc < 0) + return tjunc; + + toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG); + if (toffset < 0) + return toffset; + + /* + * Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8 + * T_OFFSET is a trim value used to improve accuracy of the result + */ + return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800); +} + +static ssize_t da9052_read_vbbat(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct da9052_hwmon *hwmon = dev_get_drvdata(dev); + int ret; + + ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", vbbat_reg_to_mV(ret)); +} + +static ssize_t da9052_hwmon_show_name(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + return sprintf(buf, "da9052-hwmon\n"); +} + +static ssize_t show_label(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + return sprintf(buf, "%s\n", + input_names[to_sensor_dev_attr(devattr)->index]); +} + +static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL, + DA9052_ADC_VDDOUT); +static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL, + DA9052_ADC_VDDOUT); +static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL, + DA9052_ADC_VBAT); +static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, + DA9052_ADC_VBAT); +static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL, + DA9052_ADC_IN4); +static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL, + DA9052_ADC_IN4); +static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL, + DA9052_ADC_IN5); +static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL, + DA9052_ADC_IN5); +static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL, + DA9052_ADC_IN6); +static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL, + DA9052_ADC_IN6); +static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL, + DA9052_ADC_VBBAT); +static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, + DA9052_ADC_VBBAT); + +static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL, + DA9052_ADC_ICH); +static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL, + DA9052_ADC_ICH); + +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL, + DA9052_ADC_TBAT); +static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL, + DA9052_ADC_TBAT); +static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL, + DA9052_ADC_TJUNC); +static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL, + DA9052_ADC_TJUNC); + +static DEVICE_ATTR(name, S_IRUGO, da9052_hwmon_show_name, NULL); + +static struct attribute *da9052_attr[] = { + &dev_attr_name.attr, + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_label.dev_attr.attr, + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in3_label.dev_attr.attr, + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in4_label.dev_attr.attr, + &sensor_dev_attr_in5_input.dev_attr.attr, + &sensor_dev_attr_in5_label.dev_attr.attr, + &sensor_dev_attr_in6_input.dev_attr.attr, + &sensor_dev_attr_in6_label.dev_attr.attr, + &sensor_dev_attr_in9_input.dev_attr.attr, + &sensor_dev_attr_in9_label.dev_attr.attr, + &sensor_dev_attr_curr1_input.dev_attr.attr, + &sensor_dev_attr_curr1_label.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_label.dev_attr.attr, + &sensor_dev_attr_temp8_input.dev_attr.attr, + &sensor_dev_attr_temp8_label.dev_attr.attr, + NULL +}; + +static const struct attribute_group da9052_attr_group = {.attrs = da9052_attr}; + +static int __init da9052_hwmon_probe(struct platform_device *pdev) +{ + struct da9052_hwmon *hwmon; + int ret; + + hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9052_hwmon), + GFP_KERNEL); + if (!hwmon) + return -ENOMEM; + + mutex_init(&hwmon->hwmon_lock); + hwmon->da9052 = dev_get_drvdata(pdev->dev.parent); + + platform_set_drvdata(pdev, hwmon); + + ret = sysfs_create_group(&pdev->dev.kobj, &da9052_attr_group); + if (ret) + goto err_mem; + + hwmon->class_device = hwmon_device_register(&pdev->dev); + if (IS_ERR(hwmon->class_device)) { + ret = PTR_ERR(hwmon->class_device); + goto err_sysfs; + } + + return 0; + +err_sysfs: + sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group); +err_mem: + return ret; +} + +static int __devexit da9052_hwmon_remove(struct platform_device *pdev) +{ + struct da9052_hwmon *hwmon = platform_get_drvdata(pdev); + + hwmon_device_unregister(hwmon->class_device); + sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group); + + return 0; +} + +static struct platform_driver da9052_hwmon_driver = { + .probe = da9052_hwmon_probe, + .remove = __devexit_p(da9052_hwmon_remove), + .driver = { + .name = "da9052-hwmon", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9052_hwmon_driver); + +MODULE_AUTHOR("David Dajun Chen <dchen(a)diasemi.com>"); +MODULE_DESCRIPTION("DA9052 HWMON driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-hwmon");

13 years, 3 months

Last call for patches for the 12.02 release of linux-linaro kernel

by Andrey Konovalov

Greetings, If someone has something which is not in the mainline, was not in the 12.01 kernel release, but worth including into the 12.02 kernel release, please let me know by the end of Feb 14, PST (the git branch where I could pull from). This release will be v3.3-rc3 based, so you patches should be based on that (easiest for me), or on the tip of the linus tree. My expectations are that the power management WG has some topics to add to the 12.02. I am aware of git://git.secretlab.ca/git/linux-2.6.git, irqdomain/next The kernel working group has some blueprints for 12.02. Please let me know, if there is something for me to do here. The following commits from linux-linaro-3.2 branch will be carried over to 12.02: commit 2eb6f8b98d8471c83be7e3ab53fe4386884c96a9 Author: Vincent Guittot <vincent.guittot(a)linaro.org> Date: Fri Oct 21 09:02:47 2011 +0200 sched: Ensure cpu_power periodic update commit 2b21b980917662503a16e079b5d4a5a8a17886cd Author: Arnd Bergmann <arnd(a)arndb.de> Date: Sat Oct 8 17:07:50 2011 +0200 ARM: kprobes: work around build errors commit 61d24dd4d0528d369ea81f6e5d5e1db9c62ad46a Author: Ming Lei <ming.lei(a)canonical.com> Date: Wed Aug 31 00:03:13 2011 +0800 usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP Amit (Amit Daniel Kachhap), please let me know if for 12.02 I should use the commits below, or take an updated version from you: ARM: exynos4: Add thermal sensor driver platform device support thermal: exynos4: Register the tmu sensor with the thermal interface layer thermal: exynos: Add thermal interface support for linux thermal layer thermal: Add generic cpu cooling implementation thermal: Add a new trip type to use cooling device instance number EXYNOS: Make EXYNOS common cpufreq driver ARM: exynos: Enable l2 configuration through device tree ARM: exynos: remove useless code to save/restore L2 ARM: exynos: save L2 settings during bootup ARM: s5p: add L2 early resume code ARM: exynos: Add support AFTR mode on EXYNOS4210 Thanks, Andrey Konovalov

13 years, 3 months

[PATCH v10] mfd: Add anatop mfd driver

by Ying-Chun Liu (PaulLiu)

From: "Ying-Chun Liu (PaulLiu)" <paul.liu(a)linaro.org> Anatop is a mfd chip embedded in Freescale i.MX6Q SoC. Anatop provides regulators and thermal. This driver handles the address space and the operation of the mfd device. Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu(a)linaro.org> Acked-by: Shawn Guo <shawn.guo(a)linaro.org> Cc: Samuel Ortiz <sameo(a)linux.intel.com> Cc: Mark Brown <broonie(a)opensource.wolfsonmicro.com> Cc: Venu Byravarasu <vbyravarasu(a)nvidia.com> Cc: Peter Korsgaard <jacmet(a)sunsite.dk> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Rob Lee <rob.lee(a)linaro.org> --- drivers/mfd/Kconfig | 8 +++ drivers/mfd/Makefile | 1 + drivers/mfd/anatop-mfd.c | 137 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/anatop.h | 40 +++++++++++++ 4 files changed, 186 insertions(+), 0 deletions(-) create mode 100644 drivers/mfd/anatop-mfd.c create mode 100644 include/linux/mfd/anatop.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 82da448..c3a9f31 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -846,6 +846,14 @@ config MFD_INTEL_MSIC Passage) chip. This chip embeds audio, battery, GPIO, etc. devices used in Intel Medfield platforms. +config MFD_ANATOP + bool "Support for Freescale i.MX on-chip ANATOP controller" + depends on SOC_IMX6Q + help + Select this option to enable Freescale i.MX on-chip ANATOP + MFD controller. This controller embeds regulator and + thermal devices for Freescale i.MX platforms. + endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 27430d3..42c8bf6 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -113,3 +113,4 @@ obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o obj-$(CONFIG_MFD_S5M_CORE) += s5m-core.o s5m-irq.o +obj-$(CONFIG_MFD_ANATOP) += anatop-mfd.o diff --git a/drivers/mfd/anatop-mfd.c b/drivers/mfd/anatop-mfd.c new file mode 100644 index 0000000..2af4248 --- /dev/null +++ b/drivers/mfd/anatop-mfd.c @@ -0,0 +1,137 @@ +/* + * Anatop MFD driver + * + * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu(a)linaro.org> + * Copyright (C) 2012 Linaro + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/mfd/anatop.h> + +u32 anatop_get_bits(struct anatop *adata, u32 addr, int bit_shift, + int bit_width) +{ + u32 val, mask; + + if (bit_width == 32) + mask = ~0; + else + mask = (1 << bit_width) - 1; + + val = readl(adata->ioreg + addr); + val = (val >> bit_shift) & mask; + + return val; +} +EXPORT_SYMBOL_GPL(anatop_get_bits); + +void anatop_set_bits(struct anatop *adata, u32 addr, int bit_shift, + int bit_width, u32 data) +{ + u32 val, mask; + + if (bit_width == 32) + mask = ~0; + else + mask = (1 << bit_width) - 1; + + spin_lock(&adata->reglock); + val = readl(adata->ioreg + addr) & ~(mask << bit_shift); + writel((data << bit_shift) | val, adata->ioreg + addr); + spin_unlock(&adata->reglock); +} +EXPORT_SYMBOL_GPL(anatop_set_bits); + +static const struct of_device_id of_anatop_match[] = { + { .compatible = "fsl,imx6q-anatop", }, + { }, +}; + +static int __devinit of_anatop_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + void *ioreg; + struct anatop *drvdata; + + ioreg = of_iomap(np, 0); + if (!ioreg) + return -EADDRNOTAVAIL; + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + drvdata->ioreg = ioreg; + spin_lock_init(&drvdata->reglock); + platform_set_drvdata(pdev, drvdata); + of_platform_populate(np, of_anatop_match, NULL, dev); + + return 0; +} + +static int __devexit of_anatop_remove(struct platform_device *pdev) +{ + struct anatop *drvdata; + drvdata = platform_get_drvdata(pdev); + iounmap(drvdata->ioreg); + + return 0; +} + +static struct platform_driver anatop_of_driver = { + .driver = { + .name = "anatop-mfd", + .owner = THIS_MODULE, + .of_match_table = of_anatop_match, + }, + .probe = of_anatop_probe, + .remove = of_anatop_remove, +}; + +static int __init anatop_init(void) +{ + return platform_driver_register(&anatop_of_driver); +} +postcore_initcall(anatop_init); + +static void __exit anatop_exit(void) +{ + platform_driver_unregister(&anatop_of_driver); +} +module_exit(anatop_exit); + +MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu(a)linaro.org>"); +MODULE_DESCRIPTION("ANATOP MFD driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/anatop.h b/include/linux/mfd/anatop.h new file mode 100644 index 0000000..22c1007 --- /dev/null +++ b/include/linux/mfd/anatop.h @@ -0,0 +1,40 @@ +/* + * anatop.h - Anatop MFD driver + * + * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu(a)linaro.org> + * Copyright (C) 2012 Linaro + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __LINUX_MFD_ANATOP_H +#define __LINUX_MFD_ANATOP_H + +#include <linux/spinlock.h> + +/** + * anatop - MFD data + * @ioreg: ioremap register + * @reglock: spinlock for register read/write + */ +struct anatop { + void *ioreg; + spinlock_t reglock; +}; + +extern u32 anatop_get_bits(struct anatop *, u32, int, int); +extern void anatop_set_bits(struct anatop *, u32, int, int, u32); + +#endif /* __LINUX_MFD_ANATOP_H */ -- 1.7.9.1

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