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authorKoen Kooi <koen@openembedded.org>2008-11-02 22:59:47 +0100
committerKoen Kooi <koen@openembedded.org>2008-11-02 22:59:47 +0100
commit2bfbd7904f474550844a5c223d2bdf081d269a50 (patch)
tree13c2f798d2d72b5b3d778b69cf78ab8714e8a934
parentcda792fbe0a54d6d78860ac27794dbfa2be1b28f (diff)
linux-omap git: add patch for omap3evm board to make ts behave
-rw-r--r--packages/linux/linux-omap/evm-mcspi-ts.diff132
-rw-r--r--packages/linux/linux-omap_git.bb1
2 files changed, 133 insertions, 0 deletions
diff --git a/packages/linux/linux-omap/evm-mcspi-ts.diff b/packages/linux/linux-omap/evm-mcspi-ts.diff
new file mode 100644
index 0000000000..64d797cf96
--- /dev/null
+++ b/packages/linux/linux-omap/evm-mcspi-ts.diff
@@ -0,0 +1,132 @@
+From linux-omap-owner@vger.kernel.org Sun Nov 02 21:08:25 2008
+Received: from localhost
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+ Sun, 02 Nov 2008 11:56:31 -0800 (PST)
+From: Grazvydas Ignotas <notasas@gmail.com>
+To: linux-omap@vger.kernel.org
+Cc: Grazvydas Ignotas <notasas@gmail.com>
+Subject: Re: omap3evm LCD red-tint workaround
+Date: Sun, 2 Nov 2008 21:56:19 +0200
+Message-Id: <1225655779-18934-1-git-send-email-notasas@gmail.com>
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+
+> PS: TS is still unusable with the 16x16 pixel resolution
+This is also the case for Pandora. The patch below fixes the problem,
+but as I have no other boards to test this on, I haven't sent it.
+See if it helps you.
+
+
+From 91f3af26bbf751b846e6265d86387e81be7c1364 Mon Sep 17 00:00:00 2001
+From: Grazvydas Ignotas <notasas@gmail.com>
+Date: Tue, 28 Oct 2008 22:01:42 +0200
+Subject: [PATCH] OMAP3: fix McSPI transfers
+
+Currently on OMAP3 if both write and read is set up for a transfer,
+the first byte returned on read is corrupted. Work around this by
+disabling channel between reads and writes, instead of transfers.
+---
+ drivers/spi/omap2_mcspi.c | 7 ++++---
+ 1 files changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
+index 454a271..4890b6c 100644
+--- a/drivers/spi/omap2_mcspi.c
++++ b/drivers/spi/omap2_mcspi.c
+@@ -710,7 +710,6 @@ static void omap2_mcspi_work(struct work_struct *work)
+ spi = m->spi;
+ cs = spi->controller_state;
+
+- omap2_mcspi_set_enable(spi, 1);
+ list_for_each_entry(t, &m->transfers, transfer_list) {
+ if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) {
+ status = -EINVAL;
+@@ -741,6 +740,8 @@ static void omap2_mcspi_work(struct work_struct *work)
+ if (t->len) {
+ unsigned count;
+
++ omap2_mcspi_set_enable(spi, 1);
++
+ /* RX_ONLY mode needs dummy data in TX reg */
+ if (t->tx_buf == NULL)
+ __raw_writel(0, cs->base
+@@ -752,6 +753,8 @@ static void omap2_mcspi_work(struct work_struct *work)
+ count = omap2_mcspi_txrx_pio(spi, t);
+ m->actual_length += count;
+
++ omap2_mcspi_set_enable(spi, 0);
++
+ if (count != t->len) {
+ status = -EIO;
+ break;
+@@ -777,8 +780,6 @@ static void omap2_mcspi_work(struct work_struct *work)
+ if (cs_active)
+ omap2_mcspi_force_cs(spi, 0);
+
+- omap2_mcspi_set_enable(spi, 0);
+-
+ m->status = status;
+ m->complete(m->context);
+
+--
+1.5.4.3
+
+--
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+
diff --git a/packages/linux/linux-omap_git.bb b/packages/linux/linux-omap_git.bb
index 6512e101da..2462484dd3 100644
--- a/packages/linux/linux-omap_git.bb
+++ b/packages/linux/linux-omap_git.bb
@@ -43,6 +43,7 @@ SRC_URI_append_beagleboard = " file://logo_linux_clut224.ppm \
"
SRC_URI_append_omap3evm = " \
+ file://evm-mcspi-ts.diff;patch=1 \
"
S = "${WORKDIR}/git"