davinci: da8xx: add spi resources and registration routine

Add IO resource structures, platform data, and a registration
routine in order to support spi device on DA850/OMAP-L138/AM18x
and DA830/OMAP-L137/AM17x platforms.

Signed-off-by: Michael Williamson <michael.williamson@criticallink.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 104 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index 9b1ecfb3905d..ec7e84b21143 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -38,14 +38,20 @@
 #define DA8XX_EMAC_MDIO_BASE            0x01e24000
 #define DA8XX_GPIO_BASE                 0x01e26000
 #define DA8XX_I2C1_BASE                 0x01e28000
+#define DA8XX_SPI0_BASE                 0x01c41000
+#define DA8XX_SPI1_BASE                 0x01f0e000
 
 #define DA8XX_EMAC_CTRL_REG_OFFSET      0x3000
 #define DA8XX_EMAC_MOD_REG_OFFSET       0x2000
 #define DA8XX_EMAC_RAM_OFFSET           0x0000
 #define DA8XX_EMAC_CTRL_RAM_SIZE        SZ_8K
 
+#define DA8XX_DMA_SPI0_RX       EDMA_CTLR_CHAN(0, 14)
+#define DA8XX_DMA_SPI0_TX       EDMA_CTLR_CHAN(0, 15)
 #define DA8XX_DMA_MMCSD0_RX     EDMA_CTLR_CHAN(0, 16)
 #define DA8XX_DMA_MMCSD0_TX     EDMA_CTLR_CHAN(0, 17)
+#define DA8XX_DMA_SPI1_RX       EDMA_CTLR_CHAN(0, 18)
+#define DA8XX_DMA_SPI1_TX       EDMA_CTLR_CHAN(0, 19)
 #define DA850_DMA_MMCSD1_RX     EDMA_CTLR_CHAN(1, 28)
 #define DA850_DMA_MMCSD1_TX     EDMA_CTLR_CHAN(1, 29)
 
@@ -723,3 +729,101 @@ int __init da8xx_register_cpuidle(void)
 
         return platform_device_register(&da8xx_cpuidle_device);
 }
+
+static struct resource da8xx_spi0_resources[] = {
+        [0] = {
+                .start  = DA8XX_SPI0_BASE,
+                .end    = DA8XX_SPI0_BASE + SZ_4K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = IRQ_DA8XX_SPINT0,
+                .end    = IRQ_DA8XX_SPINT0,
+                .flags  = IORESOURCE_IRQ,
+        },
+        [2] = {
+                .start  = DA8XX_DMA_SPI0_RX,
+                .end    = DA8XX_DMA_SPI0_RX,
+                .flags  = IORESOURCE_DMA,
+        },
+        [3] = {
+                .start  = DA8XX_DMA_SPI0_TX,
+                .end    = DA8XX_DMA_SPI0_TX,
+                .flags  = IORESOURCE_DMA,
+        },
+};
+
+static struct resource da8xx_spi1_resources[] = {
+        [0] = {
+                .start  = DA8XX_SPI1_BASE,
+                .end    = DA8XX_SPI1_BASE + SZ_4K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = IRQ_DA8XX_SPINT1,
+                .end    = IRQ_DA8XX_SPINT1,
+                .flags  = IORESOURCE_IRQ,
+        },
+        [2] = {
+                .start  = DA8XX_DMA_SPI1_RX,
+                .end    = DA8XX_DMA_SPI1_RX,
+                .flags  = IORESOURCE_DMA,
+        },
+        [3] = {
+                .start  = DA8XX_DMA_SPI1_TX,
+                .end    = DA8XX_DMA_SPI1_TX,
+                .flags  = IORESOURCE_DMA,
+        },
+};
+
+struct davinci_spi_platform_data da8xx_spi_pdata[] = {
+        [0] = {
+                .version        = SPI_VERSION_2,
+                .intr_line      = 1,
+                .dma_event_q    = EVENTQ_0,
+        },
+        [1] = {
+                .version        = SPI_VERSION_2,
+                .intr_line      = 1,
+                .dma_event_q    = EVENTQ_0,
+        },
+};
+
+static struct platform_device da8xx_spi_device[] = {
+        [0] = {
+                .name           = "spi_davinci",
+                .id             = 0,
+                .num_resources  = ARRAY_SIZE(da8xx_spi0_resources),
+                .resource       = da8xx_spi0_resources,
+                .dev            = {
+                        .platform_data = &da8xx_spi_pdata[0],
+                },
+        },
+        [1] = {
+                .name           = "spi_davinci",
+                .id             = 1,
+                .num_resources  = ARRAY_SIZE(da8xx_spi1_resources),
+                .resource       = da8xx_spi1_resources,
+                .dev            = {
+                        .platform_data = &da8xx_spi_pdata[1],
+                },
+        },
+};
+
+int __init da8xx_register_spi(int instance, struct spi_board_info *info,
+                              unsigned len)
+{
+        int ret;
+
+        if (instance < 0 || instance > 1)
+                return -EINVAL;
+
+        ret = spi_register_board_info(info, len);
+        if (ret)
+                pr_warning("%s: failed to register board info for spi %d :"
+                           " %d\n", __func__, instance, ret);
+
+        da8xx_spi_pdata[instance].num_chipselect = len;
+
+        return platform_device_register(&da8xx_spi_device[instance]);
+}