From: Hemanth V <hemanthv@xxxxxx>
This patch updates platform files for fifo, slave support.
Cc: Grant Likely <grant.likely@xxxxxxxxxxxx>
Signed-off-by: Hemanth V <hemanthv@xxxxxx>
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Govindraj.R <govindraj.raja@xxxxxx>
---
arch/arm/mach-omap2/devices.c | 5 +++++
arch/arm/plat-omap/include/plat/mcspi.h | 29 ++++++++++++++++++++++++++++-
2 files changed, 33 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index 2dbb265..fa99da1 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -251,6 +251,7 @@ static inline void omap_init_sti(void) {}
static struct omap2_mcspi_platform_config omap2_mcspi1_config = {
.num_cs = 4,
+ .force_cs_mode = 1,
};
static struct resource omap2_mcspi1_resources[] = {
@@ -273,6 +274,10 @@ static struct platform_device omap2_mcspi1 = {
static struct omap2_mcspi_platform_config omap2_mcspi2_config = {
.num_cs = 2,
+ .mode = OMAP2_MCSPI_MASTER,
+ .dma_mode = 0,
+ .force_cs_mode = 0,
+ .fifo_depth = 0,
};
static struct resource omap2_mcspi2_resources[] = {
diff --git a/arch/arm/plat-omap/include/plat/mcspi.h b/arch/arm/plat-omap/include/plat/mcspi.h
index 1254e49..23b928b 100644
--- a/arch/arm/plat-omap/include/plat/mcspi.h
+++ b/arch/arm/plat-omap/include/plat/mcspi.h
@@ -1,8 +1,35 @@
#ifndef _OMAP2_MCSPI_H
#define _OMAP2_MCSPI_H
+#define OMAP2_MCSPI_MASTER 0
+#define OMAP2_MCSPI_SLAVE 1
+
+/**
+ * struct omap2_mcspi_platform_config - McSPI controller configuration
+ * @num_cs: Number of chip selects or channels supported
+ * @mode: SPI is master or slave
+ * @dma_mode: Use only DMA for data transfers
+ * @force_cs_mode: Use force chip select mode or auto chip select mode
+ * @fifo_depth: FIFO depth in bytes, max value 64
+ *
+ * @dma_mode when set to 1 uses only dma for data transfers
+ * else the default behaviour is to use PIO mode for transfer
+ * size of 8 bytes or less. This mode is useful when mcspi
+ * is configured as slave
+ *
+ * @force_cs_mode when set to 1 allows continuous transfer of multiple
+ * spi words without toggling the chip select line.
+ *
+ * @fifo_depth when set to non zero values enables FIFO. fifo_depth
+ * should be set as a multiple of buffer size used for read/write.
+ */
+
struct omap2_mcspi_platform_config {
- unsigned short num_cs;
+ u8 num_cs;
+ u8 mode;
+ u8 dma_mode;
+ u8 force_cs_mode;
+ unsigned short fifo_depth;
};
struct omap2_mcspi_device_config {
--
1.6.3.3
--
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