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Commit 1ed6faed authored by Sifan Naeem's avatar Sifan Naeem Committed by Wolfram Sang
Browse files

i2c: img-scb: Clear line and interrupt status before starting a transfer 



Clear line status and all generated interrupts from the interrupt
status register before starting a transfer, as we may have
unserviced interrupts from previous transfers that might be
handled in the context of the new transfer.

Fixes: commit 27bce457 ("i2c: img-scb: Add Imagination Technologies I2C SCB driver")
Signed-off-by: default avatarSifan Naeem <sifan.naeem@imgtec.com>
Acked-by: default avatarJames Hogan <james.hogan@imgtec.com>
Reviewed-by: default avatarJames Hartley <james.hartley@imgtec.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent 0f0a3189

drivers/i2c/busses/i2c-img-scb.c

+9 −0
Original line number Original line Diff line number Diff line
@@ -1060,6 +1060,15 @@ static int img_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, 
		i2c->last_msg = (i == num - 1);

		i2c->last_msg = (i == num - 1);

		reinit_completion(&i2c->msg_complete);

		reinit_completion(&i2c->msg_complete);





		/*

		 * Clear line status and all interrupts before starting a

		 * transfer, as we may have unserviced interrupts from

		 * previous transfers that might be handled in the context

		 * of the new transfer.

		 */

		img_i2c_writel(i2c, SCB_INT_CLEAR_REG, ~0);

		img_i2c_writel(i2c, SCB_CLEAR_REG, ~0);



		if (atomic)

		if (atomic)

			img_i2c_atomic_start(i2c);

			img_i2c_atomic_start(i2c);

		else if (msg->flags & I2C_M_RD)

		else if (msg->flags & I2C_M_RD)