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Commit bfb6b658 authored by Sonasath, Moiz's avatar Sonasath, Moiz Committed by Ben Dooks
Browse files

i2c-omap: Bug in reading the RXSTAT/TXSTAT values from the I2C_BUFFSTAT register 



Fix bug in reading the I2C_BUFFSTAT register for getting byte count on RX/TX interrupt.

On Interrupt: I2C_STAT[RDR],
	read 'RXSTAT' from I2C_BUFFSTAT[8-13]
On Interrupt: I2C_STAT[XDR]
	read 'TXSTAT' from I2C_BUFFSTAT[0-5]

Signed-off-by: default avatarJagadeesh Pakaravoor <j-pakaravoor@ti.com>
Signed-off-by: default avatarMoiz Sonasath <m-sonasath@ti.com>
Signed-off-by: default avatarVikram pandita <vikram.pandita@ti.com>
[ben-linux@fluff.org: fixed mail format and added i2c-omap to subject]
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent ccb3bc16

drivers/i2c/busses/i2c-omap.c

+7 −5
Original line number Diff line number Diff line
@@ -692,9 +692,10 @@ omap_i2c_isr(int this_irq, void *dev_id) 
			if (dev->fifo_size) {

				if (stat & OMAP_I2C_STAT_RRDY)

					num_bytes = dev->fifo_size;

				else

					num_bytes = omap_i2c_read_reg(dev,

							OMAP_I2C_BUFSTAT_REG);

				else    /* read RXSTAT on RDR interrupt */

					num_bytes = (omap_i2c_read_reg(dev,

							OMAP_I2C_BUFSTAT_REG)

							>> 8) & 0x3F;

			}

			while (num_bytes) {

				num_bytes--;
@@ -731,9 +732,10 @@ omap_i2c_isr(int this_irq, void *dev_id) 
			if (dev->fifo_size) {

				if (stat & OMAP_I2C_STAT_XRDY)

					num_bytes = dev->fifo_size;

				else

				else    /* read TXSTAT on XDR interrupt */

					num_bytes = omap_i2c_read_reg(dev,

							OMAP_I2C_BUFSTAT_REG);

							OMAP_I2C_BUFSTAT_REG)

							& 0x3F;

			}

			while (num_bytes) {

				num_bytes--;