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rk_pwm: use clock framework API to get module clock

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

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Fix printf() to debug() nit:
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Kever Yang 2016-08-12 17:57:48 +08:00 committed by Simon Glass
parent ce26e8a1dd
commit 12406ae247
1 changed files with 14 additions and 3 deletions
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17
drivers/pwm/rk_pwm.c
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@ -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) {
debug("%s get clock fail!\n", __func__);
return -EINVAL;
}
priv->freq = clk_get_rate(&clk);
return 0;
}