* [PATCH v2 1/1] tpm/st33zp24: Add GPIO ACPI mapping table
@ 2017-03-15 19:58 Andy Shevchenko
[not found] ` <20170315195800.47263-1-andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Andy Shevchenko @ 2017-03-15 19:58 UTC (permalink / raw)
To: Peter Huewe, Marcel Selhorst, Jarkko Sakkinen,
tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f, Jason Gunthorpe
Cc: 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>
---
- Fix copy'n'paste typo in i2c driver
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..1b10e38f214e 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(&client->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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2017-03-15 19:58 [PATCH v2 1/1] tpm/st33zp24: Add GPIO ACPI mapping table Andy Shevchenko
[not found] ` <20170315195800.47263-1-andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2017-03-17 13:20 ` Jarkko Sakkinen
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