[oe-commits] Koen Kooi : linux-omap git: add patch for omap3evm board to make ts behave

GIT User account git at amethyst.openembedded.net
Sun Nov 2 22:02:52 UTC 2008


Module: openembedded.git
Branch: org.openembedded.dev
Commit: 2bfbd7904f474550844a5c223d2bdf081d269a50
URL:    http://gitweb.openembedded.net/?p=openembedded.git&a=commit;h=2bfbd7904f474550844a5c223d2bdf081d269a50

Author: Koen Kooi <koen at openembedded.org>
Date:   Sun Nov  2 22:59:47 2008 +0100

linux-omap git: add patch for omap3evm board to make ts behave

---

 packages/linux/linux-omap/evm-mcspi-ts.diff |  132 +++++++++++++++++++++++++++
 packages/linux/linux-omap_git.bb            |    1 +
 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 0000000..64d797c
--- /dev/null
+++ b/packages/linux/linux-omap/evm-mcspi-ts.diff
@@ -0,0 +1,132 @@
+From linux-omap-owner at vger.kernel.org Sun Nov 02 21:08:25 2008
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+From: Grazvydas Ignotas <notasas at gmail.com>
+To: linux-omap at vger.kernel.org
+Cc: Grazvydas Ignotas <notasas at gmail.com>
+Subject: Re: omap3evm LCD red-tint workaround
+Date: 	Sun,  2 Nov 2008 21:56:19 +0200
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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 at 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 6512e10..2462484 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"





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