[PATCH v1] tpm/st33zp24: Add GPIO ACPI mapping table

[PATCH v1] tpm/st33zp24: Add GPIO ACPI mapping table

[Andy Shevchenko]

In order to make GPIO ACPI library stricter prepare users of
gpiod_get_index() to correctly behave when there no mapping is
provided by firmware.

Here we add explicit mapping between _CRS GpioIo() resources and
their names used in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 drivers/char/tpm/st33zp24/i2c.c | 23 ++++++++++++++++++++---
 drivers/char/tpm/st33zp24/spi.c | 23 ++++++++++++++++++++---
 2 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/drivers/char/tpm/st33zp24/i2c.c b/drivers/char/tpm/st33zp24/i2c.c
index 028a9cd76b63..349fc72447a1 100644
--- a/drivers/char/tpm/st33zp24/i2c.c
+++ b/drivers/char/tpm/st33zp24/i2c.c
@@ -111,6 +111,13 @@ static const struct st33zp24_phy_ops i2c_phy_ops = {
 	.recv = st33zp24_i2c_recv,
 };
 
+static const struct acpi_gpio_params lpcpd_gpios = { 1, 0, false };
+
+static const struct acpi_gpio_mapping acpi_st33zp24_gpios[] = {
+	{ "lpcpd-gpios", &lpcpd_gpios, 1 },
+	{},
+};
+
 static int st33zp24_i2c_acpi_request_resources(struct i2c_client *client)
 {
 	struct tpm_chip *chip = i2c_get_clientdata(client);
@@ -118,10 +125,14 @@ static int st33zp24_i2c_acpi_request_resources(struct i2c_client *client)
 	struct st33zp24_i2c_phy *phy = tpm_dev->phy_id;
 	struct gpio_desc *gpiod_lpcpd;
 	struct device *dev = &client->dev;
+	int ret;
+
+	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), acpi_st33zp24_gpios);
+	if (ret)
+		return ret;
 
 	/* Get LPCPD GPIO from ACPI */
-	gpiod_lpcpd = devm_gpiod_get_index(dev, "TPM IO LPCPD", 1,
-					   GPIOD_OUT_HIGH);
+	gpiod_lpcpd = devm_gpiod_get(dev, "lpcpd", GPIOD_OUT_HIGH);
 	if (IS_ERR(gpiod_lpcpd)) {
 		dev_err(&client->dev,
 			"Failed to retrieve lpcpd-gpios from acpi.\n");
@@ -268,8 +279,14 @@ static int st33zp24_i2c_probe(struct i2c_client *client,
 static int st33zp24_i2c_remove(struct i2c_client *client)
 {
 	struct tpm_chip *chip = i2c_get_clientdata(client);
+	int ret;
 
-	return st33zp24_remove(chip);
+	ret = st33zp24_remove(chip);
+	if (ret)
+		return ret;
+
+	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&dev->dev));
+	return 0;
 }
 
 static const struct i2c_device_id st33zp24_i2c_id[] = {
diff --git a/drivers/char/tpm/st33zp24/spi.c b/drivers/char/tpm/st33zp24/spi.c
index 9f5a0117098c..c69d15198f84 100644
--- a/drivers/char/tpm/st33zp24/spi.c
+++ b/drivers/char/tpm/st33zp24/spi.c
@@ -230,6 +230,13 @@ static const struct st33zp24_phy_ops spi_phy_ops = {
 	.recv = st33zp24_spi_recv,
 };
 
+static const struct acpi_gpio_params lpcpd_gpios = { 1, 0, false };
+
+static const struct acpi_gpio_mapping acpi_st33zp24_gpios[] = {
+	{ "lpcpd-gpios", &lpcpd_gpios, 1 },
+	{},
+};
+
 static int st33zp24_spi_acpi_request_resources(struct spi_device *spi_dev)
 {
 	struct tpm_chip *chip = spi_get_drvdata(spi_dev);
@@ -237,10 +244,14 @@ static int st33zp24_spi_acpi_request_resources(struct spi_device *spi_dev)
 	struct st33zp24_spi_phy *phy = tpm_dev->phy_id;
 	struct gpio_desc *gpiod_lpcpd;
 	struct device *dev = &spi_dev->dev;
+	int ret;
+
+	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), acpi_st33zp24_gpios);
+	if (ret)
+		return ret;
 
 	/* Get LPCPD GPIO from ACPI */
-	gpiod_lpcpd = devm_gpiod_get_index(dev, "TPM IO LPCPD", 1,
-					   GPIOD_OUT_HIGH);
+	gpiod_lpcpd = devm_gpiod_get(dev, "lpcpd", GPIOD_OUT_HIGH);
 	if (IS_ERR(gpiod_lpcpd)) {
 		dev_err(dev, "Failed to retrieve lpcpd-gpios from acpi.\n");
 		phy->io_lpcpd = -1;
@@ -385,8 +396,14 @@ static int st33zp24_spi_probe(struct spi_device *dev)
 static int st33zp24_spi_remove(struct spi_device *dev)
 {
 	struct tpm_chip *chip = spi_get_drvdata(dev);
+	int ret;
 
-	return st33zp24_remove(chip);
+	ret = st33zp24_remove(chip);
+	if (ret)
+		return ret;
+
+	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&dev->dev));
+	return 0;
 }
 
 static const struct spi_device_id st33zp24_spi_id[] = {
-- 
2.11.0


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Re: [PATCH v1] tpm/st33zp24: Add GPIO ACPI mapping table

[Jarkko Sakkinen]

On Mon, Mar 13, 2017 at 07:38:11PM +0200, Andy Shevchenko wrote:
> In order to make GPIO ACPI library stricter prepare users of
> gpiod_get_index() to correctly behave when there no mapping is
> provided by firmware.
> 
> Here we add explicit mapping between _CRS GpioIo() resources and
> their names used in the driver.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>

I do not have means to test this though.

/Jarkko

> ---
>  drivers/char/tpm/st33zp24/i2c.c | 23 ++++++++++++++++++++---
>  drivers/char/tpm/st33zp24/spi.c | 23 ++++++++++++++++++++---
>  2 files changed, 40 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/char/tpm/st33zp24/i2c.c b/drivers/char/tpm/st33zp24/i2c.c
> index 028a9cd76b63..349fc72447a1 100644
> --- a/drivers/char/tpm/st33zp24/i2c.c
> +++ b/drivers/char/tpm/st33zp24/i2c.c
> @@ -111,6 +111,13 @@ static const struct st33zp24_phy_ops i2c_phy_ops = {
>  	.recv = st33zp24_i2c_recv,
>  };
>  
> +static const struct acpi_gpio_params lpcpd_gpios = { 1, 0, false };
> +
> +static const struct acpi_gpio_mapping acpi_st33zp24_gpios[] = {
> +	{ "lpcpd-gpios", &lpcpd_gpios, 1 },
> +	{},
> +};
> +
>  static int st33zp24_i2c_acpi_request_resources(struct i2c_client *client)
>  {
>  	struct tpm_chip *chip = i2c_get_clientdata(client);
> @@ -118,10 +125,14 @@ static int st33zp24_i2c_acpi_request_resources(struct i2c_client *client)
>  	struct st33zp24_i2c_phy *phy = tpm_dev->phy_id;
>  	struct gpio_desc *gpiod_lpcpd;
>  	struct device *dev = &client->dev;
> +	int ret;
> +
> +	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), acpi_st33zp24_gpios);
> +	if (ret)
> +		return ret;
>  
>  	/* Get LPCPD GPIO from ACPI */
> -	gpiod_lpcpd = devm_gpiod_get_index(dev, "TPM IO LPCPD", 1,
> -					   GPIOD_OUT_HIGH);
> +	gpiod_lpcpd = devm_gpiod_get(dev, "lpcpd", GPIOD_OUT_HIGH);
>  	if (IS_ERR(gpiod_lpcpd)) {
>  		dev_err(&client->dev,
>  			"Failed to retrieve lpcpd-gpios from acpi.\n");
> @@ -268,8 +279,14 @@ static int st33zp24_i2c_probe(struct i2c_client *client,
>  static int st33zp24_i2c_remove(struct i2c_client *client)
>  {
>  	struct tpm_chip *chip = i2c_get_clientdata(client);
> +	int ret;
>  
> -	return st33zp24_remove(chip);
> +	ret = st33zp24_remove(chip);
> +	if (ret)
> +		return ret;
> +
> +	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&dev->dev));
> +	return 0;
>  }
>  
>  static const struct i2c_device_id st33zp24_i2c_id[] = {
> diff --git a/drivers/char/tpm/st33zp24/spi.c b/drivers/char/tpm/st33zp24/spi.c
> index 9f5a0117098c..c69d15198f84 100644
> --- a/drivers/char/tpm/st33zp24/spi.c
> +++ b/drivers/char/tpm/st33zp24/spi.c
> @@ -230,6 +230,13 @@ static const struct st33zp24_phy_ops spi_phy_ops = {
>  	.recv = st33zp24_spi_recv,
>  };
>  
> +static const struct acpi_gpio_params lpcpd_gpios = { 1, 0, false };
> +
> +static const struct acpi_gpio_mapping acpi_st33zp24_gpios[] = {
> +	{ "lpcpd-gpios", &lpcpd_gpios, 1 },
> +	{},
> +};
> +
>  static int st33zp24_spi_acpi_request_resources(struct spi_device *spi_dev)
>  {
>  	struct tpm_chip *chip = spi_get_drvdata(spi_dev);
> @@ -237,10 +244,14 @@ static int st33zp24_spi_acpi_request_resources(struct spi_device *spi_dev)
>  	struct st33zp24_spi_phy *phy = tpm_dev->phy_id;
>  	struct gpio_desc *gpiod_lpcpd;
>  	struct device *dev = &spi_dev->dev;
> +	int ret;
> +
> +	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), acpi_st33zp24_gpios);
> +	if (ret)
> +		return ret;
>  
>  	/* Get LPCPD GPIO from ACPI */
> -	gpiod_lpcpd = devm_gpiod_get_index(dev, "TPM IO LPCPD", 1,
> -					   GPIOD_OUT_HIGH);
> +	gpiod_lpcpd = devm_gpiod_get(dev, "lpcpd", GPIOD_OUT_HIGH);
>  	if (IS_ERR(gpiod_lpcpd)) {
>  		dev_err(dev, "Failed to retrieve lpcpd-gpios from acpi.\n");
>  		phy->io_lpcpd = -1;
> @@ -385,8 +396,14 @@ static int st33zp24_spi_probe(struct spi_device *dev)
>  static int st33zp24_spi_remove(struct spi_device *dev)
>  {
>  	struct tpm_chip *chip = spi_get_drvdata(dev);
> +	int ret;
>  
> -	return st33zp24_remove(chip);
> +	ret = st33zp24_remove(chip);
> +	if (ret)
> +		return ret;
> +
> +	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&dev->dev));
> +	return 0;
>  }
>  
>  static const struct spi_device_id st33zp24_spi_id[] = {
> -- 
> 2.11.0
> 

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Re: [PATCH v1] tpm/st33zp24: Add GPIO ACPI mapping table

[Jerry Snitselaar]

Andy Shevchenko @ 2017-03-13 19:38 +0200:

> In order to make GPIO ACPI library stricter prepare users of
> gpiod_get_index() to correctly behave when there no mapping is
> provided by firmware.
>
> Here we add explicit mapping between _CRS GpioIo() resources and
> their names used in the driver.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> ---
>  drivers/char/tpm/st33zp24/i2c.c | 23 ++++++++++++++++++++---
>  drivers/char/tpm/st33zp24/spi.c | 23 ++++++++++++++++++++---
>  2 files changed, 40 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/char/tpm/st33zp24/i2c.c b/drivers/char/tpm/st33zp24/i2c.c
> index 028a9cd76b63..349fc72447a1 100644
> --- a/drivers/char/tpm/st33zp24/i2c.c
> +++ b/drivers/char/tpm/st33zp24/i2c.c
> @@ -111,6 +111,13 @@ static const struct st33zp24_phy_ops i2c_phy_ops = {
>  	.recv = st33zp24_i2c_recv,
>  };
>  
> +static const struct acpi_gpio_params lpcpd_gpios = { 1, 0, false };
> +
> +static const struct acpi_gpio_mapping acpi_st33zp24_gpios[] = {
> +	{ "lpcpd-gpios", &lpcpd_gpios, 1 },
> +	{},
> +};
> +
>  static int st33zp24_i2c_acpi_request_resources(struct i2c_client *client)
>  {
>  	struct tpm_chip *chip = i2c_get_clientdata(client);
> @@ -118,10 +125,14 @@ static int st33zp24_i2c_acpi_request_resources(struct i2c_client *client)
>  	struct st33zp24_i2c_phy *phy = tpm_dev->phy_id;
>  	struct gpio_desc *gpiod_lpcpd;
>  	struct device *dev = &client->dev;
> +	int ret;
> +
> +	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), acpi_st33zp24_gpios);
> +	if (ret)
> +		return ret;
>  
>  	/* Get LPCPD GPIO from ACPI */
> -	gpiod_lpcpd = devm_gpiod_get_index(dev, "TPM IO LPCPD", 1,
> -					   GPIOD_OUT_HIGH);
> +	gpiod_lpcpd = devm_gpiod_get(dev, "lpcpd", GPIOD_OUT_HIGH);
>  	if (IS_ERR(gpiod_lpcpd)) {
>  		dev_err(&client->dev,
>  			"Failed to retrieve lpcpd-gpios from acpi.\n");
> @@ -268,8 +279,14 @@ static int st33zp24_i2c_probe(struct i2c_client *client,
>  static int st33zp24_i2c_remove(struct i2c_client *client)
>  {
>  	struct tpm_chip *chip = i2c_get_clientdata(client);
> +	int ret;
>  
> -	return st33zp24_remove(chip);
> +	ret = st33zp24_remove(chip);
> +	if (ret)
> +		return ret;
> +
> +	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&dev->dev));
> +	return 0;
>  }

&chip->dev instead of &dev->dev ?


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Re: [PATCH v1] tpm/st33zp24: Add GPIO ACPI mapping table

[Andy Shevchenko]

On Wed, 2017-03-15 at 10:28 +0200, Jarkko Sakkinen wrote:
> On Mon, Mar 13, 2017 at 07:38:11PM +0200, Andy Shevchenko wrote:
> > In order to make GPIO ACPI library stricter prepare users of
> > gpiod_get_index() to correctly behave when there no mapping is
> > provided by firmware.
> > 
> > Here we add explicit mapping between _CRS GpioIo() resources and
> > their names used in the driver.
> > 
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> 
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> 
> I do not have means to test this though.

Thanks you, I have sent new version to address kbuild bot complain, but
I didn't apply your tag.

-- 
Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Intel Finland Oy

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