diff options
| author | Marc Zyngier <maz@misterjones.org> | 2010-02-18 20:33:02 +0000 |
|---|---|---|
| committer | Eric Miao <eric.y.miao@gmail.com> | 2010-03-02 07:40:59 +0800 |
| commit | 438a22fe26c3fdeb422d92072523d5b35d849dc3 (patch) | |
| tree | 673252b9d7a5adb89a2787ae195d618f5108e137 /arch/arm | |
| parent | fcfdc67ff2b104355683f7264a6559a0cc360646 (diff) | |
[ARM] pxa/zeus: Add support for mcp2515 CAN bus
Signed-off-by: Marc Zyngier <maz@misterjones.org>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/zeus.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/zeus.c | 55 |
2 files changed, 51 insertions, 6 deletions
diff --git a/arch/arm/mach-pxa/include/mach/zeus.h b/arch/arm/mach-pxa/include/mach/zeus.h index 89e4fb58e5f..6e119976003 100644 --- a/arch/arm/mach-pxa/include/mach/zeus.h +++ b/arch/arm/mach-pxa/include/mach/zeus.h @@ -58,6 +58,8 @@ #define ZEUS_EXT1_GPIO(x) (ZEUS_EXT1_GPIO_BASE + (x)) #define ZEUS_USER_GPIO(x) (ZEUS_USER_GPIO_BASE + (x)) +#define ZEUS_CAN_SHDN_GPIO ZEUS_EXT1_GPIO(2) + /* * CPLD registers: * Only 4 registers, but spreaded over a 32MB address space. diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c index 9ba8fccd98f..39896d88358 100644 --- a/arch/arm/mach-pxa/zeus.c +++ b/arch/arm/mach-pxa/zeus.c @@ -26,6 +26,7 @@ #include <linux/i2c.h> #include <linux/i2c/pca953x.h> #include <linux/apm-emulation.h> +#include <linux/can/platform/mcp251x.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> @@ -387,11 +388,47 @@ static struct pxa2xx_spi_master pxa2xx_spi_ssp3_master_info = { .enable_dma = 1, }; -static struct platform_device pxa2xx_spi_ssp3_device = { - .name = "pxa2xx-spi", - .id = 3, - .dev = { - .platform_data = &pxa2xx_spi_ssp3_master_info, +/* CAN bus on SPI */ +static int zeus_mcp2515_setup(struct spi_device *sdev) +{ + int err; + + err = gpio_request(ZEUS_CAN_SHDN_GPIO, "CAN shutdown"); + if (err) + return err; + + err = gpio_direction_output(ZEUS_CAN_SHDN_GPIO, 1); + if (err) { + gpio_free(ZEUS_CAN_SHDN_GPIO); + return err; + } + + return 0; +} + +static int zeus_mcp2515_transceiver_enable(int enable) +{ + gpio_set_value(ZEUS_CAN_SHDN_GPIO, !enable); + return 0; +} + +static struct mcp251x_platform_data zeus_mcp2515_pdata = { + .oscillator_frequency = 16*1000*1000, + .model = CAN_MCP251X_MCP2515, + .board_specific_setup = zeus_mcp2515_setup, + .transceiver_enable = zeus_mcp2515_transceiver_enable, + .power_enable = zeus_mcp2515_transceiver_enable, +}; + +static struct spi_board_info zeus_spi_board_info[] = { + [0] = { + .modalias = "mcp251x", + .platform_data = &zeus_mcp2515_pdata, + .irq = gpio_to_irq(ZEUS_CAN_GPIO), + .max_speed_hz = 1*1000*1000, + .bus_num = 3, + .mode = SPI_MODE_0, + .chip_select = 0, }, }; @@ -476,7 +513,6 @@ static struct platform_device *zeus_devices[] __initdata = { &zeus_dm9k0_device, &zeus_dm9k1_device, &zeus_sram_device, - &pxa2xx_spi_ssp3_device, &zeus_leds_device, &zeus_pcmcia_device, &zeus_max6369_device, @@ -757,6 +793,11 @@ static mfp_cfg_t zeus_pin_config[] __initdata = { GPIO104_CIF_DD_2, GPIO105_CIF_DD_1, + GPIO81_SSP3_TXD, + GPIO82_SSP3_RXD, + GPIO83_SSP3_SFRM, + GPIO84_SSP3_SCLK, + GPIO48_nPOE, GPIO49_nPWE, GPIO50_nPIOR, @@ -811,6 +852,8 @@ static void __init zeus_init(void) pxa_set_ac97_info(&zeus_ac97_info); pxa_set_i2c_info(NULL); i2c_register_board_info(0, ARRAY_AND_SIZE(zeus_i2c_devices)); + pxa2xx_set_spi_info(3, &pxa2xx_spi_ssp3_master_info); + spi_register_board_info(zeus_spi_board_info, ARRAY_SIZE(zeus_spi_board_info)); } static struct map_desc zeus_io_desc[] __initdata = { |