diff options
| -rw-r--r-- | drivers/spi/tegra_spi.c | 45 | ||||
| -rw-r--r-- | include/fdtdec.h | 1 | ||||
| -rw-r--r-- | lib/fdtdec.c | 1 |
3 files changed, 45 insertions, 2 deletions
diff --git a/drivers/spi/tegra_spi.c b/drivers/spi/tegra_spi.c index 9bb34e2938..ce19095af0 100644 --- a/drivers/spi/tegra_spi.c +++ b/drivers/spi/tegra_spi.c @@ -32,6 +32,9 @@ #include <asm/arch-tegra/clk_rst.h> #include <asm/arch-tegra/tegra_spi.h> #include <spi.h> +#include <fdtdec.h> + +DECLARE_GLOBAL_DATA_PTR; #if defined(CONFIG_SPI_CORRUPTS_UART) #define corrupt_delay() udelay(CONFIG_SPI_CORRUPTS_UART_DLY); @@ -44,6 +47,7 @@ struct tegra_spi_slave { struct spi_tegra *regs; unsigned int freq; unsigned int mode; + int periph_id; }; static inline struct tegra_spi_slave *to_tegra_spi(struct spi_slave *slave) @@ -84,8 +88,45 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, } spi->slave.bus = bus; spi->slave.cs = cs; - spi->freq = max_hz; +#ifdef CONFIG_OF_CONTROL + int node = fdtdec_next_compatible(gd->fdt_blob, 0, + COMPAT_NVIDIA_TEGRA20_SFLASH); + if (node < 0) { + debug("%s: cannot locate sflash node\n", __func__); + return NULL; + } + if (!fdtdec_get_is_enabled(gd->fdt_blob, node)) { + debug("%s: sflash is disabled\n", __func__); + return NULL; + } + spi->regs = (struct spi_tegra *)fdtdec_get_addr(gd->fdt_blob, + node, "reg"); + if ((fdt_addr_t)spi->regs == FDT_ADDR_T_NONE) { + debug("%s: no sflash register found\n", __func__); + return NULL; + } + spi->freq = fdtdec_get_int(gd->fdt_blob, node, "spi-max-frequency", 0); + if (!spi->freq) { + debug("%s: no sflash max frequency found\n", __func__); + return NULL; + } + spi->periph_id = clock_decode_periph_id(gd->fdt_blob, node); + if (spi->periph_id == PERIPH_ID_NONE) { + debug("%s: could not decode periph id\n", __func__); + return NULL; + } +#else spi->regs = (struct spi_tegra *)NV_PA_SPI_BASE; + spi->freq = TEGRA_SPI_MAX_FREQ; + spi->periph_id = PERIPH_ID_SPI1; +#endif + if (max_hz < spi->freq) { + debug("%s: limiting frequency from %u to %u\n", __func__, + spi->freq, max_hz); + spi->freq = max_hz; + } + debug("%s: controller initialized at %p, freq = %u, periph_id = %d\n", + __func__, spi->regs, spi->freq, spi->periph_id); spi->mode = mode; return &spi->slave; @@ -110,7 +151,7 @@ int spi_claim_bus(struct spi_slave *slave) u32 reg; /* Change SPI clock to correct frequency, PLLP_OUT0 source */ - clock_start_periph_pll(PERIPH_ID_SPI1, CLOCK_ID_PERIPH, spi->freq); + clock_start_periph_pll(spi->periph_id, CLOCK_ID_PERIPH, spi->freq); /* Clear stale status here */ reg = SPI_STAT_RDY | SPI_STAT_RXF_FLUSH | SPI_STAT_TXF_FLUSH | \ diff --git a/include/fdtdec.h b/include/fdtdec.h index f77d195630..5b67a770d3 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -70,6 +70,7 @@ enum fdt_compat_id { COMPAT_NVIDIA_TEGRA20_NAND, /* Tegra2 NAND controller */ COMPAT_NVIDIA_TEGRA20_PWM, /* Tegra 2 PWM controller */ COMPAT_NVIDIA_TEGRA20_DC, /* Tegra 2 Display controller */ + COMPAT_NVIDIA_TEGRA20_SFLASH, /* Tegra 2 SPI flash controller */ COMPAT_SMSC_LAN9215, /* SMSC 10/100 Ethernet LAN9215 */ COMPAT_SAMSUNG_EXYNOS5_SROMC, /* Exynos5 SROMC */ COMPAT_SAMSUNG_S3C2440_I2C, /* Exynos I2C Controller */ diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 16921e14c9..385e0e5a38 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -45,6 +45,7 @@ static const char * const compat_names[COMPAT_COUNT] = { COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), + COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), COMPAT(SMSC_LAN9215, "smsc,lan9215"), COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), |