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path: root/drivers/i2c/busses/i2c-stm32f7.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-stm32f7.c')
-rw-r--r--drivers/i2c/busses/i2c-stm32f7.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index d36cf08461f7..b24e7b937f21 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -305,7 +305,7 @@ struct stm32f7_i2c_dev {
struct regmap *regmap;
};
-/**
+/*
* All these values are coming from I2C Specification, Version 6.0, 4th of
* April 2014.
*
@@ -1192,6 +1192,8 @@ static void stm32f7_i2c_slave_start(struct stm32f7_i2c_dev *i2c_dev)
STM32F7_I2C_CR1_TXIE;
stm32f7_i2c_set_bits(base + STM32F7_I2C_CR1, mask);
+ /* Write 1st data byte */
+ writel_relaxed(value, base + STM32F7_I2C_TXDR);
} else {
/* Notify i2c slave that new write transfer is starting */
i2c_slave_event(slave, I2C_SLAVE_WRITE_REQUESTED, &value);
@@ -1501,7 +1503,7 @@ static irqreturn_t stm32f7_i2c_isr_error(int irq, void *data)
void __iomem *base = i2c_dev->base;
struct device *dev = i2c_dev->dev;
struct stm32_i2c_dma *dma = i2c_dev->dma;
- u32 mask, status;
+ u32 status;
status = readl_relaxed(i2c_dev->base + STM32F7_I2C_ISR);
@@ -1526,12 +1528,15 @@ static irqreturn_t stm32f7_i2c_isr_error(int irq, void *data)
f7_msg->result = -EINVAL;
}
- /* Disable interrupts */
- if (stm32f7_i2c_is_slave_registered(i2c_dev))
- mask = STM32F7_I2C_XFER_IRQ_MASK;
- else
- mask = STM32F7_I2C_ALL_IRQ_MASK;
- stm32f7_i2c_disable_irq(i2c_dev, mask);
+ if (!i2c_dev->slave_running) {
+ u32 mask;
+ /* Disable interrupts */
+ if (stm32f7_i2c_is_slave_registered(i2c_dev))
+ mask = STM32F7_I2C_XFER_IRQ_MASK;
+ else
+ mask = STM32F7_I2C_ALL_IRQ_MASK;
+ stm32f7_i2c_disable_irq(i2c_dev, mask);
+ }
/* Disable dma */
if (i2c_dev->use_dma) {