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-rw-r--r--drivers/char/tpm/st33zp24/i2c.c101
-rw-r--r--drivers/char/tpm/st33zp24/spi.c100
-rw-r--r--drivers/char/tpm/st33zp24/st33zp24.c39
-rw-r--r--drivers/char/tpm/st33zp24/st33zp24.h4
4 files changed, 39 insertions, 205 deletions
diff --git a/drivers/char/tpm/st33zp24/i2c.c b/drivers/char/tpm/st33zp24/i2c.c
index c560532647c8..614c7d8ed84f 100644
--- a/drivers/char/tpm/st33zp24/i2c.c
+++ b/drivers/char/tpm/st33zp24/i2c.c
@@ -6,10 +6,7 @@
#include <linux/module.h>
#include <linux/i2c.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
-#include <linux/of_irq.h>
-#include <linux/of_gpio.h>
+#include <linux/of.h>
#include <linux/acpi.h>
#include <linux/tpm.h>
@@ -21,7 +18,6 @@
struct st33zp24_i2c_phy {
struct i2c_client *client;
u8 buf[ST33ZP24_BUFSIZE + 1];
- int io_lpcpd;
};
/*
@@ -98,85 +94,6 @@ 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);
- struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
- struct st33zp24_i2c_phy *phy = tpm_dev->phy_id;
- struct gpio_desc *gpiod_lpcpd;
- struct device *dev = &client->dev;
- int ret;
-
- ret = devm_acpi_dev_add_driver_gpios(dev, acpi_st33zp24_gpios);
- if (ret)
- return ret;
-
- /* Get LPCPD GPIO from ACPI */
- 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");
- phy->io_lpcpd = -1;
- /*
- * lpcpd pin is not specified. This is not an issue as
- * power management can be also managed by TPM specific
- * commands. So leave with a success status code.
- */
- return 0;
- }
-
- phy->io_lpcpd = desc_to_gpio(gpiod_lpcpd);
-
- return 0;
-}
-
-static int st33zp24_i2c_of_request_resources(struct i2c_client *client)
-{
- struct tpm_chip *chip = i2c_get_clientdata(client);
- struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
- struct st33zp24_i2c_phy *phy = tpm_dev->phy_id;
- struct device_node *pp;
- int gpio;
- int ret;
-
- pp = client->dev.of_node;
- if (!pp) {
- dev_err(&client->dev, "No platform data\n");
- return -ENODEV;
- }
-
- /* Get GPIO from device tree */
- gpio = of_get_named_gpio(pp, "lpcpd-gpios", 0);
- if (gpio < 0) {
- dev_err(&client->dev,
- "Failed to retrieve lpcpd-gpios from dts.\n");
- phy->io_lpcpd = -1;
- /*
- * lpcpd pin is not specified. This is not an issue as
- * power management can be also managed by TPM specific
- * commands. So leave with a success status code.
- */
- return 0;
- }
- /* GPIO request and configuration */
- ret = devm_gpio_request_one(&client->dev, gpio,
- GPIOF_OUT_INIT_HIGH, "TPM IO LPCPD");
- if (ret) {
- dev_err(&client->dev, "Failed to request lpcpd pin\n");
- return -ENODEV;
- }
- phy->io_lpcpd = gpio;
-
- return 0;
-}
-
/*
* st33zp24_i2c_probe initialize the TPM device
* @param: client, the i2c_client description (TPM I2C description).
@@ -187,7 +104,6 @@ static int st33zp24_i2c_of_request_resources(struct i2c_client *client)
static int st33zp24_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- int ret;
struct st33zp24_i2c_phy *phy;
if (!client) {
@@ -208,20 +124,7 @@ static int st33zp24_i2c_probe(struct i2c_client *client,
phy->client = client;
- if (client->dev.of_node) {
- ret = st33zp24_i2c_of_request_resources(client);
- if (ret)
- return ret;
- } else if (ACPI_HANDLE(&client->dev)) {
- ret = st33zp24_i2c_acpi_request_resources(client);
- if (ret)
- return ret;
- } else {
- return -ENODEV;
- }
-
- return st33zp24_probe(phy, &i2c_phy_ops, &client->dev, client->irq,
- phy->io_lpcpd);
+ return st33zp24_probe(phy, &i2c_phy_ops, &client->dev, client->irq);
}
/*
diff --git a/drivers/char/tpm/st33zp24/spi.c b/drivers/char/tpm/st33zp24/spi.c
index 49630f2cb9b4..ff4adbe104cf 100644
--- a/drivers/char/tpm/st33zp24/spi.c
+++ b/drivers/char/tpm/st33zp24/spi.c
@@ -6,10 +6,7 @@
#include <linux/module.h>
#include <linux/spi/spi.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
-#include <linux/of_irq.h>
-#include <linux/of_gpio.h>
+#include <linux/of.h>
#include <linux/acpi.h>
#include <linux/tpm.h>
@@ -60,7 +57,6 @@ struct st33zp24_spi_phy {
u8 tx_buf[ST33ZP24_SPI_BUFFER_SIZE];
u8 rx_buf[ST33ZP24_SPI_BUFFER_SIZE];
- int io_lpcpd;
int latency;
};
@@ -217,84 +213,6 @@ 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);
- struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
- struct st33zp24_spi_phy *phy = tpm_dev->phy_id;
- struct gpio_desc *gpiod_lpcpd;
- struct device *dev = &spi_dev->dev;
- int ret;
-
- ret = devm_acpi_dev_add_driver_gpios(dev, acpi_st33zp24_gpios);
- if (ret)
- return ret;
-
- /* Get LPCPD GPIO from ACPI */
- 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;
- /*
- * lpcpd pin is not specified. This is not an issue as
- * power management can be also managed by TPM specific
- * commands. So leave with a success status code.
- */
- return 0;
- }
-
- phy->io_lpcpd = desc_to_gpio(gpiod_lpcpd);
-
- return 0;
-}
-
-static int st33zp24_spi_of_request_resources(struct spi_device *spi_dev)
-{
- struct tpm_chip *chip = spi_get_drvdata(spi_dev);
- struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
- struct st33zp24_spi_phy *phy = tpm_dev->phy_id;
- struct device_node *pp;
- int gpio;
- int ret;
-
- pp = spi_dev->dev.of_node;
- if (!pp) {
- dev_err(&spi_dev->dev, "No platform data\n");
- return -ENODEV;
- }
-
- /* Get GPIO from device tree */
- gpio = of_get_named_gpio(pp, "lpcpd-gpios", 0);
- if (gpio < 0) {
- dev_err(&spi_dev->dev,
- "Failed to retrieve lpcpd-gpios from dts.\n");
- phy->io_lpcpd = -1;
- /*
- * lpcpd pin is not specified. This is not an issue as
- * power management can be also managed by TPM specific
- * commands. So leave with a success status code.
- */
- return 0;
- }
- /* GPIO request and configuration */
- ret = devm_gpio_request_one(&spi_dev->dev, gpio,
- GPIOF_OUT_INIT_HIGH, "TPM IO LPCPD");
- if (ret) {
- dev_err(&spi_dev->dev, "Failed to request lpcpd pin\n");
- return -ENODEV;
- }
- phy->io_lpcpd = gpio;
-
- return 0;
-}
-
/*
* st33zp24_spi_probe initialize the TPM device
* @param: dev, the spi_device description (TPM SPI description).
@@ -303,7 +221,6 @@ static int st33zp24_spi_of_request_resources(struct spi_device *spi_dev)
*/
static int st33zp24_spi_probe(struct spi_device *dev)
{
- int ret;
struct st33zp24_spi_phy *phy;
/* Check SPI platform functionnalities */
@@ -320,24 +237,11 @@ static int st33zp24_spi_probe(struct spi_device *dev)
phy->spi_device = dev;
- if (dev->dev.of_node) {
- ret = st33zp24_spi_of_request_resources(dev);
- if (ret)
- return ret;
- } else if (ACPI_HANDLE(&dev->dev)) {
- ret = st33zp24_spi_acpi_request_resources(dev);
- if (ret)
- return ret;
- } else {
- return -ENODEV;
- }
-
phy->latency = st33zp24_spi_evaluate_latency(phy);
if (phy->latency <= 0)
return -ENODEV;
- return st33zp24_probe(phy, &spi_phy_ops, &dev->dev, dev->irq,
- phy->io_lpcpd);
+ return st33zp24_probe(phy, &spi_phy_ops, &dev->dev, dev->irq);
}
/*
diff --git a/drivers/char/tpm/st33zp24/st33zp24.c b/drivers/char/tpm/st33zp24/st33zp24.c
index 15b393e92c8e..a5b554cd4778 100644
--- a/drivers/char/tpm/st33zp24/st33zp24.c
+++ b/drivers/char/tpm/st33zp24/st33zp24.c
@@ -4,6 +4,7 @@
* Copyright (C) 2009 - 2016 STMicroelectronics
*/
+#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/kernel.h>
@@ -12,7 +13,7 @@
#include <linux/freezer.h>
#include <linux/string.h>
#include <linux/interrupt.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
#include <linux/io.h>
@@ -432,11 +433,18 @@ static const struct tpm_class_ops st33zp24_tpm = {
.req_canceled = st33zp24_req_canceled,
};
+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 },
+ { },
+};
+
/*
* initialize the TPM device
*/
int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
- struct device *dev, int irq, int io_lpcpd)
+ struct device *dev, int irq)
{
int ret;
u8 intmask = 0;
@@ -463,6 +471,25 @@ int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
tpm_dev->locality = LOCALITY0;
+ if (ACPI_COMPANION(dev)) {
+ ret = devm_acpi_dev_add_driver_gpios(dev, acpi_st33zp24_gpios);
+ if (ret)
+ return ret;
+ }
+
+ /*
+ * Get LPCPD GPIO. If lpcpd pin is not specified. This is not an
+ * issue as power management can be also managed by TPM specific
+ * commands.
+ */
+ tpm_dev->io_lpcpd = devm_gpiod_get_optional(dev, "lpcpd",
+ GPIOD_OUT_HIGH);
+ ret = PTR_ERR_OR_ZERO(tpm_dev->io_lpcpd);
+ if (ret) {
+ dev_err(dev, "failed to request lpcpd gpio: %d\n", ret);
+ return ret;
+ }
+
if (irq) {
/* INTERRUPT Setup */
init_waitqueue_head(&tpm_dev->read_queue);
@@ -525,8 +552,8 @@ int st33zp24_pm_suspend(struct device *dev)
int ret = 0;
- if (gpio_is_valid(tpm_dev->io_lpcpd))
- gpio_set_value(tpm_dev->io_lpcpd, 0);
+ if (tpm_dev->io_lpcpd)
+ gpiod_set_value_cansleep(tpm_dev->io_lpcpd, 0);
else
ret = tpm_pm_suspend(dev);
@@ -540,8 +567,8 @@ int st33zp24_pm_resume(struct device *dev)
struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
int ret = 0;
- if (gpio_is_valid(tpm_dev->io_lpcpd)) {
- gpio_set_value(tpm_dev->io_lpcpd, 1);
+ if (tpm_dev->io_lpcpd) {
+ gpiod_set_value_cansleep(tpm_dev->io_lpcpd, 1);
ret = wait_for_stat(chip,
TPM_STS_VALID, chip->timeout_b,
&tpm_dev->read_queue, false);
diff --git a/drivers/char/tpm/st33zp24/st33zp24.h b/drivers/char/tpm/st33zp24/st33zp24.h
index 6a26dbc3206b..5acc85f711e6 100644
--- a/drivers/char/tpm/st33zp24/st33zp24.h
+++ b/drivers/char/tpm/st33zp24/st33zp24.h
@@ -20,7 +20,7 @@ struct st33zp24_dev {
int locality;
int irq;
u32 intrs;
- int io_lpcpd;
+ struct gpio_desc *io_lpcpd;
wait_queue_head_t read_queue;
};
@@ -36,6 +36,6 @@ int st33zp24_pm_resume(struct device *dev);
#endif
int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
- struct device *dev, int irq, int io_lpcpd);
+ struct device *dev, int irq);
void st33zp24_remove(struct tpm_chip *chip);
#endif /* __LOCAL_ST33ZP24_H__ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-15 17:00:31 +0000