[PATCH] power: qcom_smbb: Make an extcon for usb cable detection

[PATCH] power: qcom_smbb: Make an extcon for usb cable detection

[Stephen Boyd]

On these PMICs the usb cable connection/disconnection is
indicated by the usb-valid interrupt being high or low
respectively. Let's make an extcon for that, so we can notify usb
drivers of the cable state.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
---
 drivers/power/qcom_smbb.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/power/qcom_smbb.c b/drivers/power/qcom_smbb.c
index 5eb1e9e543e2..b5896ba2a602 100644
--- a/drivers/power/qcom_smbb.c
+++ b/drivers/power/qcom_smbb.c
@@ -34,6 +34,7 @@
 #include <linux/power_supply.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
+#include <linux/extcon.h>
 
 #define SMBB_CHG_VMAX		0x040
 #define SMBB_CHG_VSAFE		0x041
@@ -111,6 +112,7 @@ struct smbb_charger {
 	unsigned int revision;
 	unsigned int addr;
 	struct device *dev;
+	struct extcon_dev *edev;
 
 	bool dc_disabled;
 	bool jeita_ext_temp;
@@ -125,6 +127,11 @@ struct smbb_charger {
 	struct regmap *regmap;
 };
 
+static const unsigned int smbb_usb_extcon_cable[] = {
+	EXTCON_USB,
+	EXTCON_NONE,
+};
+
 static int smbb_vbat_weak_fn(unsigned int index)
 {
 	return 2100000 + index * 100000;
@@ -371,6 +378,8 @@ static irqreturn_t smbb_usb_valid_handler(int irq, void *_data)
 	struct smbb_charger *chg = _data;
 
 	smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID);
+	extcon_set_cable_state_(chg->edev, EXTCON_USB,
+				chg->status & STATUS_USBIN_VALID);
 	power_supply_changed(chg->usb_psy);
 
 	return IRQ_HANDLED;
@@ -849,6 +858,18 @@ static int smbb_charger_probe(struct platform_device *pdev)
 		return PTR_ERR(chg->usb_psy);
 	}
 
+	chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable);
+	if (IS_ERR(chg->edev)) {
+		dev_err(&pdev->dev, "failed to allocate extcon device\n");
+		return -ENOMEM;
+	}
+
+	rc = devm_extcon_dev_register(&pdev->dev, chg->edev);
+	if (rc < 0) {
+		dev_err(&pdev->dev, "failed to register extcon device\n");
+		return rc;
+	}
+
 	if (!chg->dc_disabled) {
 		dc_cfg.drv_data = chg;
 		dc_cfg.supplied_to = smbb_bif;
-- 
2.9.0.rc2.8.ga28705d

Re: [PATCH] power: qcom_smbb: Make an extcon for usb cable detection

[Chanwoo Choi]

Hi,

Looks good to me.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>

Thanks,
Chanwoo Choi

2016-06-26 14:54 GMT+09:00 Stephen Boyd <stephen.boyd@linaro.org>:
> On these PMICs the usb cable connection/disconnection is
> indicated by the usb-valid interrupt being high or low
> respectively. Let's make an extcon for that, so we can notify usb
> drivers of the cable state.
>
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Cc: Chanwoo Choi <cw00.choi@samsung.com>
> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
> ---
>  drivers/power/qcom_smbb.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>
> diff --git a/drivers/power/qcom_smbb.c b/drivers/power/qcom_smbb.c
> index 5eb1e9e543e2..b5896ba2a602 100644
> --- a/drivers/power/qcom_smbb.c
> +++ b/drivers/power/qcom_smbb.c
> @@ -34,6 +34,7 @@
>  #include <linux/power_supply.h>
>  #include <linux/regmap.h>
>  #include <linux/slab.h>
> +#include <linux/extcon.h>
>
>  #define SMBB_CHG_VMAX          0x040
>  #define SMBB_CHG_VSAFE         0x041
> @@ -111,6 +112,7 @@ struct smbb_charger {
>         unsigned int revision;
>         unsigned int addr;
>         struct device *dev;
> +       struct extcon_dev *edev;
>
>         bool dc_disabled;
>         bool jeita_ext_temp;
> @@ -125,6 +127,11 @@ struct smbb_charger {
>         struct regmap *regmap;
>  };
>
> +static const unsigned int smbb_usb_extcon_cable[] = {
> +       EXTCON_USB,
> +       EXTCON_NONE,
> +};
> +
>  static int smbb_vbat_weak_fn(unsigned int index)
>  {
>         return 2100000 + index * 100000;
> @@ -371,6 +378,8 @@ static irqreturn_t smbb_usb_valid_handler(int irq, void *_data)
>         struct smbb_charger *chg = _data;
>
>         smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID);
> +       extcon_set_cable_state_(chg->edev, EXTCON_USB,
> +                               chg->status & STATUS_USBIN_VALID);
>         power_supply_changed(chg->usb_psy);
>
>         return IRQ_HANDLED;
> @@ -849,6 +858,18 @@ static int smbb_charger_probe(struct platform_device *pdev)
>                 return PTR_ERR(chg->usb_psy);
>         }
>
> +       chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable);
> +       if (IS_ERR(chg->edev)) {
> +               dev_err(&pdev->dev, "failed to allocate extcon device\n");
> +               return -ENOMEM;
> +       }
> +
> +       rc = devm_extcon_dev_register(&pdev->dev, chg->edev);
> +       if (rc < 0) {
> +               dev_err(&pdev->dev, "failed to register extcon device\n");
> +               return rc;
> +       }
> +
>         if (!chg->dc_disabled) {
>                 dc_cfg.drv_data = chg;
>                 dc_cfg.supplied_to = smbb_bif;
> --
> 2.9.0.rc2.8.ga28705d
>

Re: [PATCH] power: qcom_smbb: Make an extcon for usb cable detection

[Sebastian Reichel]

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Hi,

On Sat, Jun 25, 2016 at 10:54:37PM -0700, Stephen Boyd wrote:
> On these PMICs the usb cable connection/disconnection is
> indicated by the usb-valid interrupt being high or low
> respectively. Let's make an extcon for that, so we can notify usb
> drivers of the cable state.
> 
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Cc: Chanwoo Choi <cw00.choi@samsung.com>
> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>

Thanks, queued.

-- Sebastian

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