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DaVinci DM365: Adding DM365 SPI support

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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>
This commit is contained in:
Sandeep Paulraj
2010-02-01 09:51:31 -05:00
committed by Kevin Hilman
parent 15e865859a
commit a3e13e89d6
2 changed files with 72 additions and 0 deletions
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70
arch/arm/mach-davinci/dm365.c
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@@ -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,