24de7c29e5
Backport below changes for I2C QUP driver from v4.17: 0668bc44a426 i2c: qup: fix copyrights and update to SPDX identifier 7239872fb340 i2c: qup: fixed releasing dma without flush operation completion eb422b539c1f i2c: qup: minor code reorganization for use_dma 6d5f37f166bb i2c: qup: remove redundant variables for BAM SG count c5adc0fa63a9 i2c: qup: schedule EOT and FLUSH tags at the end of transfer 7e6c35fe602d i2c: qup: fix the transfer length for BAM RX EOT FLUSH tags 3f450d3eea14 i2c: qup: proper error handling for i2c error in BAM mode 08f15963bc75 i2c: qup: use the complete transfer length to choose DMA mode ecb6e1e5f435 i2c: qup: change completion timeout according to transfer length 6f2f0f6465ac i2c: qup: fix buffer overflow for multiple msg of maximum xfer len f7714b4e451b i2c: qup: send NACK for last read sub transfers fbfab1ab0658 i2c: qup: reorganization of driver code to remove polling for qup v1 7545c7dba169 i2c: qup: reorganization of driver code to remove polling for qup v2 This fixes various I2C issues observed on AP120C-AC board equipped with Atmel/Microchip AT97SC3205T TPM module. Tested-by: Christian Lamparter <chunkeey@gmail.com> Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
34 lines
1.2 KiB
Diff
34 lines
1.2 KiB
Diff
From 7e6c35fe602df6821b3e7db5b1ba656162750fda Mon Sep 17 00:00:00 2001
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From: Abhishek Sahu <absahu@codeaurora.org>
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Date: Mon, 12 Mar 2018 18:44:55 +0530
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Subject: [PATCH 06/13] i2c: qup: fix the transfer length for BAM RX EOT FLUSH
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tags
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In case of FLUSH operation, BAM copies INPUT EOT FLUSH (0x94)
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instead of normal EOT (0x93) tag in input data stream when an
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input EOT tag is received during flush operation. So only one tag
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will be written instead of 2 separate tags.
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Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
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Reviewed-by: Andy Gross <andy.gross@linaro.org>
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Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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---
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drivers/i2c/busses/i2c-qup.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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--- a/drivers/i2c/busses/i2c-qup.c
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+++ b/drivers/i2c/busses/i2c-qup.c
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@@ -774,10 +774,10 @@ static int qup_i2c_bam_do_xfer(struct qu
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qup->btx.tag.start[0] = QUP_BAM_INPUT_EOT;
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len++;
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- /* scratch buf to read the BAM EOT and FLUSH tags */
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+ /* scratch buf to read the BAM EOT FLUSH tags */
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ret = qup_sg_set_buf(&qup->brx.sg[rx_cnt++],
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&qup->brx.tag.start[0],
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- 2, qup, DMA_FROM_DEVICE);
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+ 1, qup, DMA_FROM_DEVICE);
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if (ret)
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return ret;
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}
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