diff options
| author | Simon Glass | 2016-01-21 19:43:40 -0700 |
|---|---|---|
| committer | Simon Glass | 2016-01-21 20:42:34 -0700 |
| commit | 4f43673e5ac54c3c2486eee6f1c9cf5e51744f23 (patch) | |
| tree | b1a588fac224312a4fa50c0aa20467cb47e39660 /drivers | |
| parent | 542635a0cf1fa6ad4512694c668cb93a46da422a (diff) | |
rockchip: clk: Add a function to get a peripheral clock rate
It is useful to be able to read the rate of a peripheral clock. Add a
handler for that.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clk/clk_rk3288.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/clk/clk_rk3288.c b/drivers/clk/clk_rk3288.c index 49c2bdf2b26..df5c38cf725 100644 --- a/drivers/clk/clk_rk3288.c +++ b/drivers/clk/clk_rk3288.c @@ -508,6 +508,42 @@ static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint gclk_rate, return rockchip_spi_get_clk(cru, gclk_rate, periph); } +static ulong rk3288_get_periph_rate(struct udevice *dev, int periph) +{ + struct rk3288_clk_priv *priv = dev_get_priv(dev); + struct udevice *gclk; + ulong new_rate, gclk_rate; + int ret; + + ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &gclk); + if (ret) + return ret; + gclk_rate = clk_get_rate(gclk); + switch (periph) { + case HCLK_EMMC: + case HCLK_SDIO0: + case HCLK_SDIO1: + new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, periph); + break; + case SCLK_SPI0: + case SCLK_SPI1: + case SCLK_SPI2: + new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, periph); + break; + case PCLK_I2C0: + case PCLK_I2C1: + case PCLK_I2C2: + case PCLK_I2C3: + case PCLK_I2C4: + case PCLK_I2C5: + return gclk_rate; + default: + return -ENOENT; + } + + return new_rate; +} + static ulong rk3288_set_periph_rate(struct udevice *dev, int periph, ulong rate) { struct rk3288_clk_priv *priv = dev_get_priv(dev); @@ -543,6 +579,7 @@ static struct clk_ops rk3288_clk_ops = { .get_rate = rk3288_clk_get_rate, .set_rate = rk3288_clk_set_rate, .set_periph_rate = rk3288_set_periph_rate, + .get_periph_rate = rk3288_get_periph_rate, }; static int rk3288_clk_probe(struct udevice *dev) |