From f9ecc83f8d723372976df8eda3193726d7a24fcb Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Fri, 1 Dec 2017 13:37:12 -0500 Subject: [PATCH 1/5] eeprom: at24: fix I2C device selection for runtime PM The at24 driver creates dummy I2C devices to access offsets in the chip that are outside the area supported using a single I2C address. It is not meaningful to use runtime PM to such devices; the system firmware (ACPI) does not know about these devices nor runtime PM was enabled for them. Always use the real device instead of the dummy ones. Fixes: 98e8201039af ("eeprom: at24: enable runtime pm support") Signed-off-by: Sakari Ailus Tested-by: Sven Van Asbroeck on a 24AA16/24LC16B [Bartosz: rebased on top of previous fixes for 4.15, tweaked the commit message] [Sven: fixed Bartosz's rebase] Signed-off-by: Sven Van Asbroeck Signed-off-by: Bartosz Golaszewski --- drivers/misc/eeprom/at24.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 305a7a464d09..20b4f26d30d7 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -562,7 +562,7 @@ static ssize_t at24_eeprom_write_i2c(struct at24_data *at24, const char *buf, static int at24_read(void *priv, unsigned int off, void *val, size_t count) { struct at24_data *at24 = priv; - struct i2c_client *client; + struct device *dev = &at24->client[0]->dev; char *buf = val; int ret; @@ -572,11 +572,9 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count) if (off + count > at24->chip.byte_len) return -EINVAL; - client = at24_translate_offset(at24, &off); - - ret = pm_runtime_get_sync(&client->dev); + ret = pm_runtime_get_sync(dev); if (ret < 0) { - pm_runtime_put_noidle(&client->dev); + pm_runtime_put_noidle(dev); return ret; } @@ -592,7 +590,7 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count) status = at24->read_func(at24, buf, off, count); if (status < 0) { mutex_unlock(&at24->lock); - pm_runtime_put(&client->dev); + pm_runtime_put(dev); return status; } buf += status; @@ -602,7 +600,7 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count) mutex_unlock(&at24->lock); - pm_runtime_put(&client->dev); + pm_runtime_put(dev); return 0; } @@ -610,7 +608,7 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count) static int at24_write(void *priv, unsigned int off, void *val, size_t count) { struct at24_data *at24 = priv; - struct i2c_client *client; + struct device *dev = &at24->client[0]->dev; char *buf = val; int ret; @@ -620,11 +618,9 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count) if (off + count > at24->chip.byte_len) return -EINVAL; - client = at24_translate_offset(at24, &off); - - ret = pm_runtime_get_sync(&client->dev); + ret = pm_runtime_get_sync(dev); if (ret < 0) { - pm_runtime_put_noidle(&client->dev); + pm_runtime_put_noidle(dev); return ret; } @@ -640,7 +636,7 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count) status = at24->write_func(at24, buf, off, count); if (status < 0) { mutex_unlock(&at24->lock); - pm_runtime_put(&client->dev); + pm_runtime_put(dev); return status; } buf += status; @@ -650,7 +646,7 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count) mutex_unlock(&at24->lock); - pm_runtime_put(&client->dev); + pm_runtime_put(dev); return 0; } From 7f6d2ecd3d7acaf205ea7b3e96f9ffc55b92298b Mon Sep 17 00:00:00 2001 From: David Lechner Date: Sun, 3 Dec 2017 19:54:41 -0600 Subject: [PATCH 2/5] eeprom: at24: change nvmem stride to 1 Trying to read the MAC address from an eeprom that has an offset that is not a multiple of 4 causes an error currently. Fix it by changing the nvmem stride to 1. Cc: stable@vger.kernel.org Signed-off-by: David Lechner [Bartosz: tweaked the commit message] Signed-off-by: Bartosz Golaszewski --- drivers/misc/eeprom/at24.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 20b4f26d30d7..4d63ac8a82e0 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -876,7 +876,7 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id) at24->nvmem_config.reg_read = at24_read; at24->nvmem_config.reg_write = at24_write; at24->nvmem_config.priv = at24; - at24->nvmem_config.stride = 4; + at24->nvmem_config.stride = 1; at24->nvmem_config.word_size = 1; at24->nvmem_config.size = chip.byte_len; From 04271ce9601f1686db480ea11ea1848394d9e6a2 Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Tue, 28 Nov 2017 15:55:07 +0530 Subject: [PATCH 3/5] i2c-cht-wc: constify platform_device_id platform_device_id are not supposed to change at runtime. All functions working with platform_device_id provided by work with const platform_device_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav Reviewed-by: Hans de Goede Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-cht-wc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-cht-wc.c b/drivers/i2c/busses/i2c-cht-wc.c index 0d05dadb2dc5..44cffad43701 100644 --- a/drivers/i2c/busses/i2c-cht-wc.c +++ b/drivers/i2c/busses/i2c-cht-wc.c @@ -379,7 +379,7 @@ static int cht_wc_i2c_adap_i2c_remove(struct platform_device *pdev) return 0; } -static struct platform_device_id cht_wc_i2c_adap_id_table[] = { +static const struct platform_device_id cht_wc_i2c_adap_id_table[] = { { .name = "cht_wcove_ext_chgr" }, {}, }; From 9c41e452188339989c2c9ca5fc54f10935207968 Mon Sep 17 00:00:00 2001 From: Benjamin Gaignard Date: Thu, 30 Nov 2017 09:43:57 +0100 Subject: [PATCH 4/5] i2c: stm32: Fix copyrights Uniformize STMicroelectronics copyrights headers and add SPDX identifier. Signed-off-by: Benjamin Gaignard Acked-by: Alexandre TORGUE Acked-by: Pierre-Yves MORDRET Acked-by: M'boumba Cedric Madianga Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-stm32.h | 3 ++- drivers/i2c/busses/i2c-stm32f4.c | 3 ++- drivers/i2c/busses/i2c-stm32f7.c | 3 ++- 3 files changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32.h b/drivers/i2c/busses/i2c-stm32.h index dab51761f8c5..d4f9cef251ac 100644 --- a/drivers/i2c/busses/i2c-stm32.h +++ b/drivers/i2c/busses/i2c-stm32.h @@ -1,10 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 /* * i2c-stm32.h * * Copyright (C) M'boumba Cedric Madianga 2017 + * Copyright (C) STMicroelectronics 2017 * Author: M'boumba Cedric Madianga * - * License terms: GNU General Public License (GPL), version 2 */ #ifndef _I2C_STM32_H diff --git a/drivers/i2c/busses/i2c-stm32f4.c b/drivers/i2c/busses/i2c-stm32f4.c index 4ec108496f15..47c8d00de53f 100644 --- a/drivers/i2c/busses/i2c-stm32f4.c +++ b/drivers/i2c/busses/i2c-stm32f4.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Driver for STMicroelectronics STM32 I2C controller * @@ -6,11 +7,11 @@ * http://www.st.com/resource/en/reference_manual/DM00031020.pdf * * Copyright (C) M'boumba Cedric Madianga 2016 + * Copyright (C) STMicroelectronics 2017 * Author: M'boumba Cedric Madianga * * This driver is based on i2c-st.c * - * License terms: GNU General Public License (GPL), version 2 */ #include diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index d4a6e9c2e9aa..b445b3bb0bb1 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Driver for STMicroelectronics STM32F7 I2C controller * @@ -7,11 +8,11 @@ * http://www.st.com/resource/en/reference_manual/dm00124865.pdf * * Copyright (C) M'boumba Cedric Madianga 2017 + * Copyright (C) STMicroelectronics 2017 * Author: M'boumba Cedric Madianga * * This driver is based on i2c-stm32f4.c * - * License terms: GNU General Public License (GPL), version 2 */ #include #include From 45fd4470ba86e9ca2837b666a52cc65dc69f0fa3 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Thu, 7 Dec 2017 12:25:45 +0100 Subject: [PATCH 5/5] i2c: piix4: Fix port number check on release The port number shift is still hard-coded to 1 while it now depends on the hardware. Thankfully 0 is always 0 no matter how you shift it, so this was a bug without consequences. Signed-off-by: Jean Delvare Fixes: 0fe16195f891 ("i2c: piix4: Fix SMBus port selection for AMD Family 17h chips") Reviewed-by: Guenter Roeck Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-piix4.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c index 174579d32e5f..462948e2c535 100644 --- a/drivers/i2c/busses/i2c-piix4.c +++ b/drivers/i2c/busses/i2c-piix4.c @@ -983,7 +983,7 @@ static void piix4_adap_remove(struct i2c_adapter *adap) if (adapdata->smba) { i2c_del_adapter(adap); - if (adapdata->port == (0 << 1)) { + if (adapdata->port == (0 << piix4_port_shift_sb800)) { release_region(adapdata->smba, SMBIOSIZE); if (adapdata->sb800_main) release_region(SB800_PIIX4_SMB_IDX, 2);