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i2c: i2c_cdns: Fix clearing of all interrupts

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The arbitration lost interrupt was not getting cleared
while clearing interrupts. This patch fixes this by adding
arbitration lost interrupt as well during clear. This patch
also removes hardcoded value and defined a macro for it.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Siva Durga Prasad Paladugu 2019-03-07 11:52:48 +01:00 • committed by Heiko Schocher
parent da53b0543d
commit 006265d063
1 changed files with 11 additions and 1 deletions
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12
drivers/i2c/i2c-cdns.c
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@ -64,6 +64,16 @@ struct cdns_i2c_regs {
#define CDNS_I2C_INTERRUPT_RXUNF 0x00000080
#define CDNS_I2C_INTERRUPT_ARBLOST 0x00000200
#define CDNS_I2C_INTERRUPTS_MASK (CDNS_I2C_INTERRUPT_COMP | \
CDNS_I2C_INTERRUPT_DATA | \
CDNS_I2C_INTERRUPT_NACK | \
CDNS_I2C_INTERRUPT_TO | \
CDNS_I2C_INTERRUPT_SLVRDY | \
CDNS_I2C_INTERRUPT_RXOVF | \
CDNS_I2C_INTERRUPT_TXOVF | \
CDNS_I2C_INTERRUPT_RXUNF | \
CDNS_I2C_INTERRUPT_ARBLOST)
#define CDNS_I2C_FIFO_DEPTH 16
#define CDNS_I2C_TRANSFER_SIZE_MAX 255 /* Controller transfer limit */
#define CDNS_I2C_TRANSFER_SIZE (CDNS_I2C_TRANSFER_SIZE_MAX - 3)
@ -241,7 +251,7 @@ static int cdns_i2c_write_data(struct i2c_cdns_bus *i2c_bus, u32 addr, u8 *data,
setbits_le32(&regs->control, CDNS_I2C_CONTROL_HOLD);
/* Clear the interrupts in status register */
writel(0xFF, &regs->interrupt_status);
writel(CDNS_I2C_INTERRUPTS_MASK, &regs->interrupt_status);
writel(addr, &regs->address);