diff options
| author | Mirza Krak <[email protected]> | 2015-09-08 10:30:49 +0200 |
|---|---|---|
| committer | Jagan Teki <[email protected]> | 2015-10-11 16:43:06 +0530 |
| commit | 5cb1b7b395c0150e179f3b748d755cdc2f613a06 (patch) | |
| tree | 60eeef47ea03756ceadf8955cde1336e5244287d /drivers | |
| parent | a22bba81e40959c3675b794422508911034049d4 (diff) | |
spi: tegra20: Add support for mode selection
Respect the mode passed in set_mode ops.
Signed-off-by: Mirza Krak <[email protected]>
Reviewed-by: Jagan Teki <[email protected]>
Diffstat (limited to 'drivers')
| -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 fbb665b86f3..144716fd91f 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); |