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Date: Tue, 1 Nov 2022 03:10:07 +0200
From: Jarkko Sakkinen <jarkko@...nel.org>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Peter Huewe <peterhuewe@....de>, Jason Gunthorpe <jgg@...pe.ca>,
linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] tpm: st33zp24: drop support for platform data
On Thu, Oct 27, 2022 at 12:13:47AM -0700, Dmitry Torokhov wrote:
> Drop support for platform data from the driver because there are no
> users of st33zp24_platform_data structure in the mainline kernel.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>
> v3: switch back to using TPM_ST33_SPI macro when setting SPI driver name
> v2: reworked commit message
>
> drivers/char/tpm/st33zp24/i2c.c | 41 ++-----------------------
> drivers/char/tpm/st33zp24/spi.c | 42 ++------------------------
> drivers/char/tpm/st33zp24/st33zp24.h | 3 ++
> include/linux/platform_data/st33zp24.h | 16 ----------
> 4 files changed, 9 insertions(+), 93 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..2b121d009959 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);
> 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__ */
> --
> 2.38.0.135.g90850a2211-goog
>
Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>
BR, Jarkko
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