u-boot: add patches required for i.MX and i.MXS families

This adds the set of patches, that will be included in next u-boot
release, on top of 2012.04.01 version. Those fix known issues with
supported machines.

The patches are managed on branch 'patches-2012.04.01' of
https://github.com/Freescale/u-boot-imx repository.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 57 insertions, 0 deletions

diff --git a/recipes-bsp/u-boot/u-boot-2012.04.01/0041-spi-mxs-Allow-other-chip-selects-to-work.patch b/recipes-bsp/u-boot/u-boot-2012.04.01/0041-spi-mxs-Allow-other-chip-selects-to-work.patch
new file mode 100644
index 0000000..03a4fe9
--- /dev/null
+++ b/recipes-bsp/u-boot/u-boot-2012.04.01/0041-spi-mxs-Allow-other-chip-selects-to-work.patch
@@ -0,0 +1,57 @@
+From f61ed79b5e9e95a15a7fa1e2180dfe7d64cd2d17 Mon Sep 17 00:00:00 2001
+From: Fabio Estevam <fabio.estevam@freescale.com>
+Date: Mon, 23 Apr 2012 08:30:50 +0000
+Subject: [PATCH 41/56] spi: mxs: Allow other chip selects to work
+
+MXS SSP controller may have up to three chip selects per port: SS0, SS1 and SS2.
+
+Currently only SS0 is supported in the mxs_spi driver.
+
+Allow all the three chip select to work by selecting the desired one
+in bits 20 and 21 of the HW_SSP_CTRL0 register.
+
+Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
+Acked-by: Marek Vasut <marex@denx.de>
+---
+ drivers/spi/mxs_spi.c |   10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c
+index e7237e7..7859536 100644
+--- a/drivers/spi/mxs_spi.c
++++ b/drivers/spi/mxs_spi.c
+@@ -34,6 +34,8 @@
+ 
+ #define        MXS_SPI_MAX_TIMEOUT     1000000
+ #define        MXS_SPI_PORT_OFFSET     0x2000
++#define MXS_SSP_CHIPSELECT_MASK                0x00300000
++#define MXS_SSP_CHIPSELECT_SHIFT       20
+ 
+ struct mxs_spi_slave {
+        struct spi_slave        slave;
+@@ -65,6 +67,8 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ {
+        struct mxs_spi_slave *mxs_slave;
+        uint32_t addr;
++       struct mx28_ssp_regs *ssp_regs;
++       int reg;
+ 
+        if (!spi_cs_is_valid(bus, cs)) {
+                printf("mxs_spi: invalid bus %d / chip select %d\n", bus, cs);
+@@ -82,7 +86,13 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+        mxs_slave->max_khz = max_hz / 1000;
+        mxs_slave->mode = mode;
+        mxs_slave->regs = (struct mx28_ssp_regs *)addr;
++       ssp_regs = mxs_slave->regs;
+ 
++       reg = readl(&ssp_regs->hw_ssp_ctrl0);
++       reg &= ~(MXS_SSP_CHIPSELECT_MASK);
++       reg |= cs << MXS_SSP_CHIPSELECT_SHIFT;
++
++       writel(reg, &ssp_regs->hw_ssp_ctrl0);
+        return &mxs_slave->slave;
+ }
+ 
+-- 
+1.7.10
+