[PATCH 1/3] tpm: st33zp24: drop support for platform data

Dmitry Torokhov
2022-09-26T05:40:12Z

There are no users of st33zp24_platform_data in mainline, and new boards
should be using device tree or ACPI to describe resources, so let's drop
support for platform data from the driver.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
drivers/char/tpm/st33zp24/i2c.c | 41 ++----------------------
drivers/char/tpm/st33zp24/spi.c | 44 +++-----------------------
drivers/char/tpm/st33zp24/st33zp24.h | 3 ++
include/linux/platform_data/st33zp24.h | 16 ----------
4 files changed, 10 insertions(+), 94 deletions(-)
delete mode 100644 include/linux/platform_data/st33zp24.h

diff --git a/drivers/char/tpm/st33zp24/i2c.c b/drivers/char/tpm/st33zp24/i2c.c
index a3aa411389e7..c560532647c8 100644
--- a/drivers/char/tpm/st33zp24/i2c.c
+++ b/drivers/char/tpm/st33zp24/i2c.c
@@ -12,7 +12,6 @@
#include <linux/of_gpio.h>
#include <linux/acpi.h>
#include <linux/tpm.h>
-#include <linux/platform_data/st33zp24.h>

#include "../tpm.h"
#include "st33zp24.h"
@@ -178,36 +177,6 @@ static int st33zp24_i2c_of_request_resources(struct i2c_client *client)
return 0;
}

-static int st33zp24_i2c_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 st33zp24_platform_data *pdata;
- int ret;
-
- pdata = client->dev.platform_data;
- if (!pdata) {
- dev_err(&client->dev, "No platform data\n");
- return -ENODEV;
- }
-
- /* store for late use */
- phy->io_lpcpd = pdata->io_lpcpd;
-
- if (gpio_is_valid(pdata->io_lpcpd)) {
- ret = devm_gpio_request_one(&client->dev,
- pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH,
- "TPM IO_LPCPD");
- if (ret) {
- dev_err(&client->dev, "Failed to request lpcpd pin\n");
- return ret;
- }
- }
-
- return 0;
-}
-
/*
* st33zp24_i2c_probe initialize the TPM device
* @param: client, the i2c_client description (TPM I2C description).
@@ -219,7 +188,6 @@ static int st33zp24_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
- struct st33zp24_platform_data *pdata;
struct st33zp24_i2c_phy *phy;

if (!client) {
@@ -240,19 +208,16 @@ static int st33zp24_i2c_probe(struct i2c_client *client,

phy->client = client;

- pdata = client->dev.platform_data;
- if (!pdata && client->dev.of_node) {
+ if (client->dev.of_node) {
ret = st33zp24_i2c_of_request_resources(client);
if (ret)
return ret;
- } else if (pdata) {
- ret = st33zp24_i2c_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,
diff --git a/drivers/char/tpm/st33zp24/spi.c b/drivers/char/tpm/st33zp24/spi.c
index 22d184884694..49630f2cb9b4 100644
--- a/drivers/char/tpm/st33zp24/spi.c
+++ b/drivers/char/tpm/st33zp24/spi.c
@@ -12,7 +12,6 @@
#include <linux/of_gpio.h>
#include <linux/acpi.h>
#include <linux/tpm.h>
-#include <linux/platform_data/st33zp24.h>

#include "../tpm.h"
#include "st33zp24.h"
@@ -296,37 +295,6 @@ static int st33zp24_spi_of_request_resources(struct spi_device *spi_dev)
return 0;
}

-static int st33zp24_spi_request_resources(struct spi_device *dev)
-{
- struct tpm_chip *chip = spi_get_drvdata(dev);
- struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
- struct st33zp24_spi_phy *phy = tpm_dev->phy_id;
- struct st33zp24_platform_data *pdata;
- int ret;
-
- pdata = dev->dev.platform_data;
- if (!pdata) {
- dev_err(&dev->dev, "No platform data\n");
- return -ENODEV;
- }
-
- /* store for late use */
- phy->io_lpcpd = pdata->io_lpcpd;
-
- if (gpio_is_valid(pdata->io_lpcpd)) {
- ret = devm_gpio_request_one(&dev->dev,
- pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH,
- "TPM IO_LPCPD");
- if (ret) {
- dev_err(&dev->dev, "%s : reset gpio_request failed\n",
- __FILE__);
- return ret;
- }
- }
-
- return 0;
-}
-
/*
* st33zp24_spi_probe initialize the TPM device
* @param: dev, the spi_device description (TPM SPI description).
@@ -336,7 +304,6 @@ static int st33zp24_spi_request_resources(struct spi_device *dev)
static int st33zp24_spi_probe(struct spi_device *dev)
{
int ret;
- struct st33zp24_platform_data *pdata;
struct st33zp24_spi_phy *phy;

/* Check SPI platform functionnalities */
@@ -353,19 +320,16 @@ static int st33zp24_spi_probe(struct spi_device *dev)

phy->spi_device = dev;

- pdata = dev->dev.platform_data;
- if (!pdata && dev->dev.of_node) {
+ if (dev->dev.of_node) {
ret = st33zp24_spi_of_request_resources(dev);
if (ret)
return ret;
- } else if (pdata) {
- ret = st33zp24_spi_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);
@@ -411,7 +375,7 @@ static SIMPLE_DEV_PM_OPS(st33zp24_spi_ops, st33zp24_pm_suspend,

static struct spi_driver st33zp24_spi_driver = {
.driver = {
- .name = TPM_ST33_SPI,
+ .name = "st33zp24-spi",
.pm = &st33zp24_spi_ops,
.of_match_table = of_match_ptr(of_st33zp24_spi_match),
.acpi_match_table = ACPI_PTR(st33zp24_spi_acpi_match),
diff --git a/drivers/char/tpm/st33zp24/st33zp24.h b/drivers/char/tpm/st33zp24/st33zp24.h
index b387a476c555..6a26dbc3206b 100644
--- a/drivers/char/tpm/st33zp24/st33zp24.h
+++ b/drivers/char/tpm/st33zp24/st33zp24.h
@@ -7,6 +7,9 @@
#ifndef __LOCAL_ST33ZP24_H__
#define __LOCAL_ST33ZP24_H__

+#define TPM_ST33_I2C "st33zp24-i2c"
+#define TPM_ST33_SPI "st33zp24-spi"
+
#define TPM_WRITE_DIRECTION 0x80
#define ST33ZP24_BUFSIZE 2048

diff --git a/include/linux/platform_data/st33zp24.h b/include/linux/platform_data/st33zp24.h
deleted file mode 100644
index 61db674f36cc..000000000000
--- a/include/linux/platform_data/st33zp24.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * STMicroelectronics TPM Linux driver for TPM 1.2 ST33ZP24
- * Copyright (C) 2009 - 2016 STMicroelectronics
- */
-#ifndef __ST33ZP24_H__
-#define __ST33ZP24_H__
-
-#define TPM_ST33_I2C "st33zp24-i2c"
-#define TPM_ST33_SPI "st33zp24-spi"
-
-struct st33zp24_platform_data {
- int io_lpcpd;
-};
-
-#endif /* __ST33ZP24_H__ */
--
2.37.3.998.g577e59143f-goog