clk: pwm: Use pwm_get_args() where appropriate

The PWM framework has clarified the concept of reference PWM config (the
platform dependent config retrieved from the DT or the PWM lookup table)
and real PWM state.

Use pwm_get_args() when the PWM user wants to retrieve this reference
config and not the current state.

This is part of the rework allowing the PWM framework to support
hardware readout and expose real PWM state even when the PWM has just
been requested (before the user calls pwm_config/enable/disable()).

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/drivers/clk/clk-pwm.c b/drivers/clk/clk-pwm.c
index 883045814dac2536fcb667b36e3db01d8715596e..1630a1f085f70cfeb7983b1329da1166ff6eb8e2 100644 (file)
--- a/drivers/clk/clk-pwm.c
+++ b/drivers/clk/clk-pwm.c
@@ -59,6 +59,7 @@ static int clk_pwm_probe(struct platform_device *pdev)
        struct clk_init_data init;
        struct clk_pwm *clk_pwm;
        struct pwm_device *pwm;
+       struct pwm_args pargs;
        const char *clk_name;
        struct clk *clk;
        int ret;
@@ -71,22 +72,28 @@ static int clk_pwm_probe(struct platform_device *pdev)
        if (IS_ERR(pwm))
                return PTR_ERR(pwm);
 
-       if (!pwm->period) {
+       pwm_get_args(pwm, &pargs);
+       if (!pargs.period) {
                dev_err(&pdev->dev, "invalid PWM period\n");
                return -EINVAL;
        }
 
        if (of_property_read_u32(node, "clock-frequency", &clk_pwm->fixed_rate))
-               clk_pwm->fixed_rate = NSEC_PER_SEC / pwm->period;
+               clk_pwm->fixed_rate = NSEC_PER_SEC / pargs.period;
 
-       if (pwm->period != NSEC_PER_SEC / clk_pwm->fixed_rate &&
-           pwm->period != DIV_ROUND_UP(NSEC_PER_SEC, clk_pwm->fixed_rate)) {
+       if (pargs.period != NSEC_PER_SEC / clk_pwm->fixed_rate &&
+           pargs.period != DIV_ROUND_UP(NSEC_PER_SEC, clk_pwm->fixed_rate)) {
                dev_err(&pdev->dev,
                        "clock-frequency does not match PWM period\n");
                return -EINVAL;
        }
 
-       ret = pwm_config(pwm, (pwm->period + 1) >> 1, pwm->period);
+       /*
+        * FIXME: pwm_apply_args() should be removed when switching to the
+        * atomic PWM API.
+        */
+       pwm_apply_args(pwm);
+       ret = pwm_config(pwm, (pargs.period + 1) >> 1, pargs.period);
        if (ret < 0)
                return ret;