diff mbox

[04/15] twl4030_charger: use runtime_pm to keep usb phy active while charging.

Message ID 20150224043350.4243.51289.stgit@notabene.brown (mailing list archive)
State New, archived
Headers show

Commit Message

NeilBrown Feb. 24, 2015, 4:33 a.m. UTC 
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.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 drivers/mfd/twl-core.c          |    9 ++++-----
 drivers/power/twl4030_charger.c |   18 +++++-------------
 2 files changed, 9 insertions(+), 18 deletions(-)



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Comments

Lee Jones Feb. 25, 2015, 7:24 a.m. UTC | #1 
On Tue, 24 Feb 2015, NeilBrown wrote:

> 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.
> 
> Signed-off-by: NeilBrown <neilb@suse.de>
> ---
>  drivers/mfd/twl-core.c          |    9 ++++-----

Acked-by: Lee Jones <lee.jones@linaro.org>

>  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 51321f0c5548..11f352a5ef55 100644
> --- a/drivers/power/twl4030_charger.c
> +++ b/drivers/power/twl4030_charger.c
> @@ -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;
>  		}
>  	}
> @@ -602,8 +596,6 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
>  	bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
>  	bci->usb.get_property = twl4030_bci_get_property;
>  
> -	bci->usb_reg = regulator_get(bci->dev, "bci3v1");
> -
>  	ret = devm_power_supply_register(&pdev->dev, &bci->usb);
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
> 
>
NeilBrown March 5, 2015, 5:48 a.m. UTC | #2 
On Wed, 25 Feb 2015 07:24:43 +0000 Lee Jones <lee.jones@linaro.org> wrote:

> On Tue, 24 Feb 2015, NeilBrown wrote:
> 
> > 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.
> > 
> > Signed-off-by: NeilBrown <neilb@suse.de>
> > ---
> >  drivers/mfd/twl-core.c          |    9 ++++-----
> 
> Acked-by: Lee Jones <lee.jones@linaro.org>

Thanks.
I guess that clear it to go in though the 'power supply' tree.

NeilBrown
diff mbox

Patch

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 51321f0c5548..11f352a5ef55 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -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;
 		}
 	}
@@ -602,8 +596,6 @@  static int __init twl4030_bci_probe(struct platform_device *pdev)
 	bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
 	bci->usb.get_property = twl4030_bci_get_property;
 
-	bci->usb_reg = regulator_get(bci->dev, "bci3v1");
-
 	ret = devm_power_supply_register(&pdev->dev, &bci->usb);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register usb: %d\n", ret);