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49 From: Grazvydas Ignotas <notasas@gmail.com>
50 To: linux-omap@vger.kernel.org
51 Cc: Grazvydas Ignotas <notasas@gmail.com>
52 Subject: Re: omap3evm LCD red-tint workaround
53 Date: Sun, 2 Nov 2008 21:56:19 +0200
54 Message-Id: <1225655779-18934-1-git-send-email-notasas@gmail.com>
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68 > PS: TS is still unusable with the 16x16 pixel resolution
69 This is also the case for Pandora. The patch below fixes the problem,
70 but as I have no other boards to test this on, I haven't sent it.
74 From 91f3af26bbf751b846e6265d86387e81be7c1364 Mon Sep 17 00:00:00 2001
75 From: Grazvydas Ignotas <notasas@gmail.com>
76 Date: Tue, 28 Oct 2008 22:01:42 +0200
77 Subject: [PATCH] OMAP3: fix McSPI transfers
79 Currently on OMAP3 if both write and read is set up for a transfer,
80 the first byte returned on read is corrupted. Work around this by
81 disabling channel between reads and writes, instead of transfers.
83 drivers/spi/omap2_mcspi.c | 7 ++++---
84 1 files changed, 4 insertions(+), 3 deletions(-)
86 diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
87 index 454a271..4890b6c 100644
88 --- a/drivers/spi/omap2_mcspi.c
89 +++ b/drivers/spi/omap2_mcspi.c
90 @@ -710,7 +710,6 @@ static void omap2_mcspi_work(struct work_struct *work)
92 cs = spi->controller_state;
94 - omap2_mcspi_set_enable(spi, 1);
95 list_for_each_entry(t, &m->transfers, transfer_list) {
96 if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) {
98 @@ -741,6 +740,8 @@ static void omap2_mcspi_work(struct work_struct *work)
102 + omap2_mcspi_set_enable(spi, 1);
104 /* RX_ONLY mode needs dummy data in TX reg */
105 if (t->tx_buf == NULL)
106 __raw_writel(0, cs->base
107 @@ -752,6 +753,8 @@ static void omap2_mcspi_work(struct work_struct *work)
108 count = omap2_mcspi_txrx_pio(spi, t);
109 m->actual_length += count;
111 + omap2_mcspi_set_enable(spi, 0);
113 if (count != t->len) {
116 @@ -777,8 +780,6 @@ static void omap2_mcspi_work(struct work_struct *work)
118 omap2_mcspi_force_cs(spi, 0);
120 - omap2_mcspi_set_enable(spi, 0);
123 m->complete(m->context);
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