driver: pwm: pwm-imx: introduce pwm_dm_imx_get_parms
Introduce pwm_dm_imx_get_parms, dm version of pwm_imx_get_parms. This function get clock rate using clk dm api Signed-off-by: Tommaso Merciai <tommaso.merciai@amarulasolutions.com>
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committed by
Stefano Babic

parent
bfc778cb93
commit
6828b3ecea
@@ -88,6 +88,36 @@ struct imx_pwm_priv {
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struct clk ipg_clk;
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struct clk ipg_clk;
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};
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};
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int pwm_dm_imx_get_parms(struct imx_pwm_priv *priv, int period_ns,
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int duty_ns, unsigned long *period_c, unsigned long *duty_c,
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unsigned long *prescale)
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{
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unsigned long long c;
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c = clk_get_rate(&priv->per_clk);
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c = c * period_ns;
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do_div(c, 1000000000);
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*period_c = c;
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*prescale = *period_c / 0x10000 + 1;
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*period_c /= *prescale;
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c = *period_c * (unsigned long long)duty_ns;
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do_div(c, period_ns);
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*duty_c = c;
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/*
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* according to imx pwm RM, the real period value should be
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* PERIOD value in PWMPR plus 2.
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*/
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if (*period_c > 2)
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*period_c -= 2;
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else
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*period_c = 0;
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return 0;
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}
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static int imx_pwm_set_invert(struct udevice *dev, uint channel,
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static int imx_pwm_set_invert(struct udevice *dev, uint channel,
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bool polarity)
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bool polarity)
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{
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{
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@@ -108,7 +138,7 @@ static int imx_pwm_set_config(struct udevice *dev, uint channel,
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debug("%s: Config '%s' channel: %d\n", __func__, dev->name, channel);
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debug("%s: Config '%s' channel: %d\n", __func__, dev->name, channel);
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pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles,
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pwm_dm_imx_get_parms(priv, period_ns, duty_ns, &period_cycles, &duty_cycles,
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&prescale);
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&prescale);
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return pwm_config_internal(regs, period_cycles, duty_cycles, prescale);
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return pwm_config_internal(regs, period_cycles, duty_cycles, prescale);
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