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twl4030_charger: use runtime_pm to keep usb phy active while charging.

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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 ab37813f40
    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 <[email protected]>
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
This commit is contained in:
NeilBrown 2015-07-30 10:11:24 +10:00 • committed by Sebastian Reichel
commit e57c4a67d7
2 changed files with 9 additions and 18 deletions
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18
drivers/power/twl4030_charger.c
View file

@ -22,7 +22,6 @@
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
#include <linux/regulator/machine.h>
#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)) {