DaVinci DM365: Adding DM365 SPI support

This patch adds SPI init for DM365.
It does the following
1) Initializes SPI0
2) Defines resources to be used by SPI0
3) Adds platform data for SPI0

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index e88f2624df68447b5a8a936ad68517047625e699..27772e18e45b948014b18e6294e08eaee1846afb 100644 (file)
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -18,6 +18,7 @@
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/gpio.h>
+#include <linux/spi/spi.h>
 
 #include <asm/mach/map.h>
 
@@ -32,6 +33,8 @@
 #include <mach/common.h>
 #include <mach/asp.h>
 #include <mach/keyscan.h>
+#include <mach/spi.h>
+
 
 #include "clock.h"
 #include "mux.h"
@@ -611,6 +614,73 @@ EVT_CFG(DM365,     EVT3_VC_RX,          1,     1,    1,     false)
 #endif
 };
 
+static u64 dm365_spi0_dma_mask = DMA_BIT_MASK(32);
+
+static struct davinci_spi_platform_data dm365_spi0_pdata = {
+       .version        = SPI_VERSION_1,
+       .num_chipselect = 2,
+       .clk_internal   = 1,
+       .cs_hold        = 1,
+       .intr_level     = 0,
+       .poll_mode      = 1,    /* 0 -> interrupt mode 1-> polling mode */
+       .c2tdelay       = 0,
+       .t2cdelay       = 0,
+};
+
+static struct resource dm365_spi0_resources[] = {
+       {
+               .start = 0x01c66000,
+               .end   = 0x01c667ff,
+               .flags = IORESOURCE_MEM,
+       },
+       {
+               .start = IRQ_DM365_SPIINT0_0,
+               .flags = IORESOURCE_IRQ,
+       },
+       {
+               .start = 17,
+               .flags = IORESOURCE_DMA,
+       },
+       {
+               .start = 16,
+               .flags = IORESOURCE_DMA,
+       },
+       {
+               .start = EVENTQ_3,
+               .flags = IORESOURCE_DMA,
+       },
+};
+
+static struct platform_device dm365_spi0_device = {
+       .name = "spi_davinci",
+       .id = 0,
+       .dev = {
+               .dma_mask = &dm365_spi0_dma_mask,
+               .coherent_dma_mask = DMA_BIT_MASK(32),
+               .platform_data = &dm365_spi0_pdata,
+       },
+       .num_resources = ARRAY_SIZE(dm365_spi0_resources),
+       .resource = dm365_spi0_resources,
+};
+
+void __init dm365_init_spi0(unsigned chipselect_mask,
+               struct spi_board_info *info, unsigned len)
+{
+       davinci_cfg_reg(DM365_SPI0_SCLK);
+       davinci_cfg_reg(DM365_SPI0_SDI);
+       davinci_cfg_reg(DM365_SPI0_SDO);
+
+       /* not all slaves will be wired up */
+       if (chipselect_mask & BIT(0))
+               davinci_cfg_reg(DM365_SPI0_SDENA0);
+       if (chipselect_mask & BIT(1))
+               davinci_cfg_reg(DM365_SPI0_SDENA1);
+
+       spi_register_board_info(info, len);
+
+       platform_device_register(&dm365_spi0_device);
+}
+
 static struct emac_platform_data dm365_emac_pdata = {
        .ctrl_reg_offset        = DM365_EMAC_CNTRL_OFFSET,
        .ctrl_mod_reg_offset    = DM365_EMAC_CNTRL_MOD_OFFSET,

diff --git a/arch/arm/mach-davinci/include/mach/dm365.h b/arch/arm/mach-davinci/include/mach/dm365.h
index fdf6f8507cc3301cc280eb6d341a03cb9f5f85e5..3a37b5a6983ca034bd91bebf2a53a6ac3c0bff7e 100644 (file)
--- a/arch/arm/mach-davinci/include/mach/dm365.h
+++ b/arch/arm/mach-davinci/include/mach/dm365.h
@@ -41,6 +41,8 @@ void __init dm365_init_asp(struct snd_platform_data *pdata);
 void __init dm365_init_vc(struct snd_platform_data *pdata);
 void __init dm365_init_ks(struct davinci_ks_platform_data *pdata);
 void __init dm365_init_rtc(void);
+void dm365_init_spi0(unsigned chipselect_mask,
+                       struct spi_board_info *info, unsigned len);
 
 void dm365_set_vpfe_config(struct vpfe_config *cfg);
 #endif /* __ASM_ARCH_DM365_H */