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Commit 28ad3321 authored by Kevin Wells's avatar Kevin Wells Committed by Ben Dooks
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i2c-pnx: Add stop conditions for end of transfer 



Add a stop condition bit flag to the last byte in the transfer.
This will generate an extra clock to handle the stop condition
and prevent devices from staying in an ACK'd state.

Signed-off-by: default avatarKevin Wells <wellsk40@gmail.com>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent be80dbaa

drivers/i2c/busses/i2c-pnx.c

+6 −0
Original line number Diff line number Diff line
@@ -173,6 +173,9 @@ static int i2c_pnx_master_xmit(struct i2c_pnx_algo_data *alg_data) 
		/* We still have something to talk about... */

		val = *alg_data->mif.buf++;



		if (alg_data->mif.len == 1)

			val |= stop_bit;



		alg_data->mif.len--;

		iowrite32(val, I2C_REG_TX(alg_data));
@@ -246,6 +249,9 @@ static int i2c_pnx_master_rcv(struct i2c_pnx_algo_data *alg_data) 
			__func__);



		if (alg_data->mif.len == 1) {

			/* Last byte, do not acknowledge next rcv. */

			val |= stop_bit;



			/*

			 * Enable interrupt RFDAIE (data in Rx fifo),

			 * and disable DRMIE (need data for Tx)