af7e570c3b
Fixes e.g. SPI flash access on BCM6358/BCM6368. Transfers < 256 bytes are not affected. Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 39265
31 lines
880 B
Diff
31 lines
880 B
Diff
From 4d8fa9d3d1fe1d70fe7d59537acf49797f6010a1 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jogo@openwrt.org>
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Date: Sun, 1 Dec 2013 16:19:46 +0100
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Subject: [PATCH 2/2] spi/bcm63xx: don't reject reads >= 256 bytes
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The rx_tail register is only 8 bit wide, so it will wrap around
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after 256 read bytes. This makes it rather meaningless, so drop any
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usage of it to not treat reads over 256 as failed.
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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---
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drivers/spi/spi-bcm63xx.c | 8 +-------
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1 file changed, 1 insertion(+), 7 deletions(-)
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--- a/drivers/spi/spi-bcm63xx.c
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+++ b/drivers/spi/spi-bcm63xx.c
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@@ -214,13 +214,7 @@ static int bcm63xx_txrx_bufs(struct spi_
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if (!timeout)
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return -ETIMEDOUT;
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- /* read out all data */
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- rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
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-
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- if (do_rx && rx_tail != len)
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- return -EIO;
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-
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- if (!rx_tail)
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+ if (!do_rx)
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return 0;
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len = 0;
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