Dear All,
we are using L138 EVM and custom daughter card which has LCD interface. We use SPI1 to configure LCD driver. We use SPI1_SCS[2] for chip select. I have made following changes in kernel source. Currently on EVM SPI flash is on SPI1 interface with SPI_SCS[0].
I am using dvsdk_omapl138-evm_4_01_00_09 and kernel version is linux-2.6.33-rc4-psp03.20.00.14
-----------------------------------------------------------------------------------------------------------------------
In file board_arch/arm/mach-davinci/da850.c
struct davinci_ili9325_info davinci_spi_ili9325_info = {
.chip_sel = 0x04, //ToDo: double check this
.commit_delay = 3,
};
static struct spi_board_info da850_spi_board_info[] = {
[0] = {
.modalias = "m25p80",
.platform_data = &spi_flash_data,
.mode = SPI_MODE_0,
.max_speed_hz = 30000000, /* max sample rate at 3V */
.bus_num = 1,
.chip_select = 0,
},
[1] = {
.modalias = DAVINCI_SPI_ILI9325_NAME,
.platform_data = &davinci_spi_ili9325_info,
.mode = SPI_MODE_0,
.irq = 0,
.max_speed_hz = 10 * 1000 * 1000 /* max sample rate at 3V */ ,
.bus_num = 1,
.chip_select = 2,
},
};
In file arch/arm/mach-davinci/da850.c
/* SPI1 function */
MUX_CFG(DA850, SPI1_CS_0, 5, 4, 15, 1, false)
MUX_CFG(DA850, SPI1_CS_2, 4, 28, 15, 1, false)
MUX_CFG(DA850, SPI1_CLK, 5, 8, 15, 1, false)
MUX_CFG(DA850, SPI1_SOMI, 5, 16, 15, 1, false)
MUX_CFG(DA850, SPI1_SIMO, 5, 20, 15, 1, false)
const short da850_spi1_pins[] __initdata = {
DA850_SPI1_CS_0, DA850_SPI1_CS_2, DA850_SPI1_CLK, DA850_SPI1_SOMI, DA850_SPI1_SIMO,
-1
};
In file arch/arm/mach-davinci/devices-da8xx.c
static struct davinci_spi_platform_data da850_spi1_pdata = {
.version = SPI_VERSION_2,
// .num_chipselect = 1,
.num_chipselect = 3, QUESTION: Is this correct?
.wdelay = 0,
.odd_parity = 0,
.parity_enable = 0,
.wait_enable = 0,
.timer_disable = 0,
.clk_internal = 1,
.cs_hold = 1,
.intr_level = 0,
.poll_mode = 1,
.use_dma = 1,
.c2tdelay = 8,
.t2cdelay = 8,
};
In file arch/arm/mach-davinci/include/mach/mux.h
/* SPI1 function */
DA850_SPI1_CS_0,
DA850_SPI1_CS_2, QUESTION: Is this entry correct? Can we create new entry anywhere in this enum or it has any method to be followed?
DA850_SPI1_CLK,
DA850_SPI1_SOMI,
DA850_SPI1_SIMO,
In file driver/spi/davinci_spi.h
//#define SPI_MAX_CHIPSELECT 2
#define SPI_MAX_CHIPSELECT 3 QUESTION: I s this correct?
-----------------------------------------------------------------------------------------------------------------------
I have still not included device specific driver. I am just checking if platform specific details are OKay?
When I boot I get following error in kernel boot log
spi_davinci spi_davinci.1: can't setup spi1.2, status -11
spi_davinci spi_davinci.1: Controller at 0xfef0e000
I dont know what am I missing here? Please let me know what i should be doing?
Regards,
Dipen patel
