5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tony Lindgren tony@atomide.com
[ Upstream commit 3b384cc74b00b5ac21d18e4c1efc3c1da5300971 ]
Looks like the driver sleep pins configuration is unusable. Adding the sleep pins causes the usb phy to not respond. We need to use the default pins in probe, and only set sleep pins at phy_mdm6600_device_power_off().
As the modem can also be booted to a serial port mode for firmware flashing, let's make the pin changes limited to probe and remove. For probe, we get the default pins automatically. We only need to set the sleep pins in phy_mdm6600_device_power_off() to prevent the modem from waking up because the gpio line glitches.
If it turns out that we need a separate state for phy_mdm6600_power_on() and phy_mdm6600_power_off(), we can use the pinctrl idle state.
Cc: Ivaylo Dimitrov ivo.g.dimitrov.75@gmail.com Cc: Merlijn Wajer merlijn@wizzup.org Cc: Pavel Machek pavel@ucw.cz Cc: Sebastian Reichel sre@kernel.org Fixes: 2ad2af081622 ("phy: mapphone-mdm6600: Improve phy related runtime PM calls") Signed-off-by: Tony Lindgren tony@atomide.com Reviewed-by: Sebastian Reichel sebastian.reichel@collabora.com Link: https://lore.kernel.org/r/20230913060433.48373-3-tony@atomide.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/phy/motorola/phy-mapphone-mdm6600.c | 29 +++++++++------------ 1 file changed, 12 insertions(+), 17 deletions(-)
diff --git a/drivers/phy/motorola/phy-mapphone-mdm6600.c b/drivers/phy/motorola/phy-mapphone-mdm6600.c index 50a7f2a1ea16a..a79d6cf202209 100644 --- a/drivers/phy/motorola/phy-mapphone-mdm6600.c +++ b/drivers/phy/motorola/phy-mapphone-mdm6600.c @@ -122,16 +122,10 @@ static int phy_mdm6600_power_on(struct phy *x) { struct phy_mdm6600 *ddata = phy_get_drvdata(x); struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; - int error;
if (!ddata->enabled) return -ENODEV;
- error = pinctrl_pm_select_default_state(ddata->dev); - if (error) - dev_warn(ddata->dev, "%s: error with default_state: %i\n", - __func__, error); - gpiod_set_value_cansleep(enable_gpio, 1);
/* Allow aggressive PM for USB, it's only needed for n_gsm port */ @@ -160,11 +154,6 @@ static int phy_mdm6600_power_off(struct phy *x)
gpiod_set_value_cansleep(enable_gpio, 0);
- error = pinctrl_pm_select_sleep_state(ddata->dev); - if (error) - dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", - __func__, error); - return 0; }
@@ -455,6 +444,7 @@ static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata) { struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; + int error;
ddata->enabled = false; phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ); @@ -470,6 +460,17 @@ static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata) } else { dev_err(ddata->dev, "Timed out powering down\n"); } + + /* + * Keep reset gpio high with padconf internal pull-up resistor to + * prevent modem from waking up during deeper SoC idle states. The + * gpio bank lines can have glitches if not in the always-on wkup + * domain. + */ + error = pinctrl_pm_select_sleep_state(ddata->dev); + if (error) + dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", + __func__, error); }
static void phy_mdm6600_deferred_power_on(struct work_struct *work) @@ -570,12 +571,6 @@ static int phy_mdm6600_probe(struct platform_device *pdev) ddata->dev = &pdev->dev; platform_set_drvdata(pdev, ddata);
- /* Active state selected in phy_mdm6600_power_on() */ - error = pinctrl_pm_select_sleep_state(ddata->dev); - if (error) - dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", - __func__, error); - error = phy_mdm6600_init_lines(ddata); if (error) return error;