[U-Boot] [PATCH 3/5] rk_pwm: use clock framework API to get module clock

This patch use clock API instead of hardcode for get pwm clock.

Signed-off-by: Kever Yang kever.yang@rock-chips.com ---

drivers/pwm/rk_pwm.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/pwm/rk_pwm.c b/drivers/pwm/rk_pwm.c index 2d289a4..d69aab5 100644 --- a/drivers/pwm/rk_pwm.c +++ b/drivers/pwm/rk_pwm.c @@ -6,6 +6,7 @@ */

#include <common.h> +#include <clk.h> #include <div64.h> #include <dm.h> #include <pwm.h> @@ -13,9 +14,9 @@ #include <syscon.h> #include <asm/io.h> #include <asm/arch/clock.h> -#include <asm/arch/cru_rk3288.h> #include <asm/arch/grf_rk3288.h> #include <asm/arch/pwm.h> +#include <asm/arch/hardware.h> #include <power/regulator.h>

DECLARE_GLOBAL_DATA_PTR; @@ -23,6 +24,7 @@ DECLARE_GLOBAL_DATA_PTR; struct rk_pwm_priv { struct rk3288_pwm *regs; struct rk3288_grf *grf; + ulong freq; };

static int rk_pwm_set_config(struct udevice *dev, uint channel, uint period_ns, @@ -38,8 +40,8 @@ static int rk_pwm_set_config(struct udevice *dev, uint channel, uint period_ns, RK_PWM_DISABLE, &regs->ctrl);

- period = lldiv((uint64_t)(PD_BUS_PCLK_HZ / 1000) * period_ns, 1000000); - duty = lldiv((uint64_t)(PD_BUS_PCLK_HZ / 1000) * duty_ns, 1000000); + period = lldiv((uint64_t)(priv->freq / 1000) * period_ns, 1000000); + duty = lldiv((uint64_t)(priv->freq / 1000) * duty_ns, 1000000);

writel(period, &regs->period_hpr); writel(duty, &regs->duty_lpr); @@ -76,9 +78,18 @@ static int rk_pwm_ofdata_to_platdata(struct udevice *dev) static int rk_pwm_probe(struct udevice *dev) { struct rk_pwm_priv *priv = dev_get_priv(dev); + struct clk clk; + int ret = 0;

rk_setreg(&priv->grf->soc_con2, 1 << 0);

+ ret = clk_get_by_index(dev, 0, &clk); + if (ret < 0) { + printf("%s get clock fail!\n", __func__); + return -EINVAL; + } + priv->freq = clk_get_rate(&clk); + return 0; }