From e57c4a67d71275e4a15b9f0f92a322ea27b26a6e Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 30 Jul 2015 10:11:24 +1000 Subject: [PATCH] twl4030_charger: use runtime_pm to keep usb phy active while charging. The twl4030 usb phy needs to be active while we are using the USB VBUS as a current source for charging. In particular, the usb3v1 regulator must be enabled and the PHY_PWR_PHYPWD bit must be set to keep the phy powered. commit ab37813f4093a5f59cb8e083cde277289dc72ed3 twl4030_charger: Allow charger to control the regulator that feeds it gave the charger control over the regulator, but didn't resolve the PHY_PWR_PHYPWD issue. Now that both of these are controlled by runtime_pm in phy-twl4030-usb, we can simply take a runtime_pm reference to the USB phy whenever the charger wants to use it as a current source. So this patch reverts the above commit, and adds the necessary runtime_pm calls. Acked-by: Lee Jones Signed-off-by: NeilBrown Signed-off-by: Sebastian Reichel --- drivers/mfd/twl-core.c | 9 ++++----- drivers/power/twl4030_charger.c | 18 +++++------------- 2 files changed, 9 insertions(+), 18 deletions(-) diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c index 489674a2497e..831696ee2472 100644 --- a/drivers/mfd/twl-core.c +++ b/drivers/mfd/twl-core.c @@ -788,9 +788,8 @@ add_children(struct twl4030_platform_data *pdata, unsigned irq_base, static struct regulator_consumer_supply usb1v8 = { .supply = "usb1v8", }; - static struct regulator_consumer_supply usb3v1[] = { - { .supply = "usb3v1" }, - { .supply = "bci3v1" }, + static struct regulator_consumer_supply usb3v1 = { + .supply = "usb3v1", }; /* First add the regulators so that they can be used by transceiver */ @@ -818,7 +817,7 @@ add_children(struct twl4030_platform_data *pdata, unsigned irq_base, return PTR_ERR(child); child = add_regulator_linked(TWL4030_REG_VUSB3V1, - &usb_fixed, usb3v1, 2, + &usb_fixed, &usb3v1, 1, features); if (IS_ERR(child)) return PTR_ERR(child); @@ -838,7 +837,7 @@ add_children(struct twl4030_platform_data *pdata, unsigned irq_base, if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) { usb1v5.dev_name = dev_name(child); usb1v8.dev_name = dev_name(child); - usb3v1[0].dev_name = dev_name(child); + usb3v1.dev_name = dev_name(child); } } diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c index 709d90dc75f1..fe71c61109f5 100644 --- a/drivers/power/twl4030_charger.c +++ b/drivers/power/twl4030_charger.c @@ -22,7 +22,6 @@ #include #include #include -#include #define TWL4030_BCIMSTATEC 0x02 #define TWL4030_BCIICHG 0x08 @@ -94,7 +93,6 @@ struct twl4030_bci { struct work_struct work; int irq_chg; int irq_bci; - struct regulator *usb_reg; int usb_enabled; unsigned long event; @@ -208,7 +206,7 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) { int ret; - if (enable) { + if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { /* Check for USB charger connected */ if (!twl4030_bci_have_vbus(bci)) return -ENODEV; @@ -222,14 +220,9 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) return -EACCES; } - /* Need to keep regulator on */ + /* Need to keep phy powered */ if (!bci->usb_enabled) { - ret = regulator_enable(bci->usb_reg); - if (ret) { - dev_err(bci->dev, - "Failed to enable regulator\n"); - return ret; - } + pm_runtime_get_sync(bci->transceiver->dev); bci->usb_enabled = 1; } @@ -244,7 +237,8 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) } else { ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); if (bci->usb_enabled) { - regulator_disable(bci->usb_reg); + pm_runtime_mark_last_busy(bci->transceiver->dev); + pm_runtime_put_autosuspend(bci->transceiver->dev); bci->usb_enabled = 0; } } @@ -609,8 +603,6 @@ static int __init twl4030_bci_probe(struct platform_device *pdev) return ret; } - bci->usb_reg = regulator_get(bci->dev, "bci3v1"); - bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, NULL); if (IS_ERR(bci->usb)) {