This patch adds pinmux support for SPI channels
Signed-off-by: Rajeshwari Shinde rajeshwari.s@samsung.com --- arch/arm/cpu/armv7/exynos/pinmux.c | 51 ++++++++++++++++++++++++++++- arch/arm/include/asm/arch-exynos/periph.h | 5 +++ arch/arm/include/asm/arch-exynos/pinmux.h | 3 ++ 3 files changed, 58 insertions(+), 1 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c index 7776add..13f75e0 100644 --- a/arch/arm/cpu/armv7/exynos/pinmux.c +++ b/arch/arm/cpu/armv7/exynos/pinmux.c @@ -230,6 +230,49 @@ static void exynos5_i2c_config(int peripheral, int flags) } }
+void exynos5_spi_config(int peripheral) +{ + int cfg = 0, pin = 0, i; + struct s5p_gpio_bank *bank = NULL; + struct exynos5_gpio_part1 *gpio1 = + (struct exynos5_gpio_part1 *) samsung_get_base_gpio_part1(); + struct exynos5_gpio_part2 *gpio2 = + (struct exynos5_gpio_part2 *) samsung_get_base_gpio_part2(); + + switch (peripheral) { + case PERIPH_ID_SPI0: + bank = &gpio1->a2; + cfg = GPIO_FUNC(0x2); + pin = 0; + break; + case PERIPH_ID_SPI1: + bank = &gpio1->a2; + cfg = GPIO_FUNC(0x2); + pin = 4; + break; + case PERIPH_ID_SPI2: + bank = &gpio1->b1; + cfg = GPIO_FUNC(0x5); + pin = 1; + break; + case PERIPH_ID_SPI3: + bank = &gpio2->f1; + cfg = GPIO_FUNC(0x2); + pin = 0; + break; + case PERIPH_ID_SPI4: + for (i = 2; i < 4; i++) + s5p_gpio_cfg_pin(&gpio2->f0, i, GPIO_FUNC(0x4)); + for (i = 4; i < 6; i++) + s5p_gpio_cfg_pin(&gpio2->e0, i, GPIO_FUNC(0x4)); + break; + } + if (peripheral != PERIPH_ID_SPI4) { + for (i = pin; i < pin + 4; i++) + s5p_gpio_cfg_pin(bank, i, cfg); + } +} + static int exynos5_pinmux_config(int peripheral, int flags) { switch (peripheral) { @@ -257,11 +300,17 @@ static int exynos5_pinmux_config(int peripheral, int flags) case PERIPH_ID_I2C7: exynos5_i2c_config(peripheral, flags); break; + case PERIPH_ID_SPI0: + case PERIPH_ID_SPI1: + case PERIPH_ID_SPI2: + case PERIPH_ID_SPI3: + case PERIPH_ID_SPI4: + exynos5_spi_config(peripheral); + break; default: debug("%s: invalid peripheral %d", __func__, peripheral); return -1; } - return 0; }
diff --git a/arch/arm/include/asm/arch-exynos/periph.h b/arch/arm/include/asm/arch-exynos/periph.h index b861d7d..dafc3f3 100644 --- a/arch/arm/include/asm/arch-exynos/periph.h +++ b/arch/arm/include/asm/arch-exynos/periph.h @@ -43,6 +43,11 @@ enum periph_id { PERIPH_ID_SDMMC2, PERIPH_ID_SDMMC3, PERIPH_ID_SROMC, + PERIPH_ID_SPI0, + PERIPH_ID_SPI1, + PERIPH_ID_SPI2, + PERIPH_ID_SPI3, + PERIPH_ID_SPI4, PERIPH_ID_UART0, PERIPH_ID_UART1, PERIPH_ID_UART2, diff --git a/arch/arm/include/asm/arch-exynos/pinmux.h b/arch/arm/include/asm/arch-exynos/pinmux.h index 10ea736..57c80be 100644 --- a/arch/arm/include/asm/arch-exynos/pinmux.h +++ b/arch/arm/include/asm/arch-exynos/pinmux.h @@ -36,6 +36,9 @@ enum { /* Flags for eMMC */ PINMUX_FLAG_8BIT_MODE = 1 << 0, /* SDMMC 8-bit mode */
+ /* Flag for SPI */ + PINMUX_FLAG_SLAVE_MODE = 1 << 0, /* Slave mode */ + /* Flags for SROM controller */ PINMUX_FLAG_BANK = 3 << 0, /* bank number (0-3) */ PINMUX_FLAG_16BIT = 1 << 2, /* 16-bit width */