[U-Boot] [PATCH 1/2] i2c: i2c_cdns: Fix clearing of all interrupts

[Michal Simek]

From: Siva Durga Prasad Paladugu <siva.durga.paladugu at xilinx.com>

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 at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

 drivers/i2c/i2c-cdns.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-cdns.c b/drivers/i2c/i2c-cdns.c
index 4330d28c2b0d..b391c0ba49b8 100644
--- a/drivers/i2c/i2c-cdns.c
+++ b/drivers/i2c/i2c-cdns.c
@@ -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);
 
-- 
1.9.1