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| author | Stefano Babic <sbabic@denx.de> | 2015-10-15 15:34:14 +0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-10-15 15:34:14 +0200 |
| commit | f74dc51bcab924a30e41b33981a4f96af3f9dd57 (patch) | |
| tree | 560eead1ca9984554be3a5c9a5332b531c102cb0 /drivers/spi/tegra20_slink.c | |
| parent | cf04ad3219260c3c39ec3dbfe2427e3463e8dbd5 (diff) | |
| parent | 297faccca2235e359012118495b9b73451d54bb9 (diff) | |
Merge branch 'master' of git://git.denx.de/u-boot
Diffstat (limited to 'drivers/spi/tegra20_slink.c')
| -rw-r--r-- | drivers/spi/tegra20_slink.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/spi/tegra20_slink.c b/drivers/spi/tegra20_slink.c index fbb665b86f..144716fd91 100644 --- a/drivers/spi/tegra20_slink.c +++ b/drivers/spi/tegra20_slink.c @@ -36,6 +36,11 @@ DECLARE_GLOBAL_DATA_PTR; #define SLINK_CMD_ENB (1 << 31) #define SLINK_CMD_GO (1 << 30) #define SLINK_CMD_M_S (1 << 28) +#define SLINK_CMD_IDLE_SCLK_DRIVE_LOW (0 << 24) +#define SLINK_CMD_IDLE_SCLK_DRIVE_HIGH (1 << 24) +#define SLINK_CMD_IDLE_SCLK_PULL_LOW (2 << 24) +#define SLINK_CMD_IDLE_SCLK_PULL_HIGH (3 << 24) +#define SLINK_CMD_IDLE_SCLK_MASK (3 << 24) #define SLINK_CMD_CK_SDA (1 << 21) #define SLINK_CMD_CS_POL (1 << 13) #define SLINK_CMD_CS_VAL (1 << 12) @@ -331,6 +336,22 @@ static int tegra30_spi_set_speed(struct udevice *bus, uint speed) static int tegra30_spi_set_mode(struct udevice *bus, uint mode) { struct tegra30_spi_priv *priv = dev_get_priv(bus); + struct spi_regs *regs = priv->regs; + u32 reg; + + reg = readl(®s->command); + + /* Set CPOL and CPHA */ + reg &= ~(SLINK_CMD_IDLE_SCLK_MASK | SLINK_CMD_CK_SDA); + if (mode & SPI_CPHA) + reg |= SLINK_CMD_CK_SDA; + + if (mode & SPI_CPOL) + reg |= SLINK_CMD_IDLE_SCLK_DRIVE_HIGH; + else + reg |= SLINK_CMD_IDLE_SCLK_DRIVE_LOW; + + writel(reg, ®s->command); priv->mode = mode; debug("%s: regs=%p, mode=%d\n", __func__, priv->regs, priv->mode); |