diff options
| author | Alain Volmat <alain.volmat@st.com> | 2020-03-10 12:58:41 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2020-03-13 15:17:54 +0100 |
| commit | bf22461ed2c278da6f668d2c650ab2bba277814f (patch) | |
| tree | 0f663e93bb4087817c0a5d908fbbae202c0db239 /drivers/i2c | |
| parent | a47070aac935b9c0e5d0f99843e0c8784f455ea7 (diff) | |
i2c: stm32f7: do not backup read-only PECR register
The PECR register provides received packet computed PEC value.
It makes no sense restoring its value after a reset, and anyway,
as read-only register it cannot be restored.
Fixes: ea6dd25deeb5 ("i2c: stm32f7: add PM_SLEEP suspend/resume support")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-stm32f7.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index 8fe7f8caf91b..6418f5982894 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -176,7 +176,6 @@ * @cr2: Control register 2 * @oar1: Own address 1 register * @oar2: Own address 2 register - * @pecr: PEC register * @tmgr: Timing register */ struct stm32f7_i2c_regs { @@ -184,7 +183,6 @@ struct stm32f7_i2c_regs { u32 cr2; u32 oar1; u32 oar2; - u32 pecr; u32 tmgr; }; @@ -2196,7 +2194,6 @@ static int stm32f7_i2c_regs_backup(struct stm32f7_i2c_dev *i2c_dev) backup_regs->cr2 = readl_relaxed(i2c_dev->base + STM32F7_I2C_CR2); backup_regs->oar1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_OAR1); backup_regs->oar2 = readl_relaxed(i2c_dev->base + STM32F7_I2C_OAR2); - backup_regs->pecr = readl_relaxed(i2c_dev->base + STM32F7_I2C_PECR); backup_regs->tmgr = readl_relaxed(i2c_dev->base + STM32F7_I2C_TIMINGR); stm32f7_i2c_write_fm_plus_bits(i2c_dev, false); @@ -2229,7 +2226,6 @@ static int stm32f7_i2c_regs_restore(struct stm32f7_i2c_dev *i2c_dev) writel_relaxed(backup_regs->cr2, i2c_dev->base + STM32F7_I2C_CR2); writel_relaxed(backup_regs->oar1, i2c_dev->base + STM32F7_I2C_OAR1); writel_relaxed(backup_regs->oar2, i2c_dev->base + STM32F7_I2C_OAR2); - writel_relaxed(backup_regs->pecr, i2c_dev->base + STM32F7_I2C_PECR); stm32f7_i2c_write_fm_plus_bits(i2c_dev, true); pm_runtime_put_sync(i2c_dev->dev); |