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clk: pwm: implement the .get_duty_cycle callback 

Commit 9fba738a53 ("clk: add duty cycle support") added support for
getting and setting the duty cycle of a clock. This implements the
get_duty_cycle callback for PWM based clocks so the duty cycle is shown
in the debugfs output (/sys/kernel/debug/clk/clk_summary).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Martin Blumenstingl 2019-05-25 20:42:53 +02:00 committed by Stephen Boyd
parent a188339ca5
commit 4c34282fb7
1 changed files with 14 additions and 0 deletions
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14
drivers/clk/clk-pwm.c
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@ -47,10 +47,24 @@ static unsigned long clk_pwm_recalc_rate(struct clk_hw *hw,
return clk_pwm->fixed_rate; return clk_pwm->fixed_rate;
} }
static int clk_pwm_get_duty_cycle(struct clk_hw *hw, struct clk_duty *duty)
{
struct clk_pwm *clk_pwm = to_clk_pwm(hw);
struct pwm_state state;
pwm_get_state(clk_pwm->pwm, &state);
duty->num = state.duty_cycle;
duty->den = state.period;
return 0;
}
static const struct clk_ops clk_pwm_ops = { static const struct clk_ops clk_pwm_ops = {
.prepare = clk_pwm_prepare, .prepare = clk_pwm_prepare,
.unprepare = clk_pwm_unprepare, .unprepare = clk_pwm_unprepare,
.recalc_rate = clk_pwm_recalc_rate, .recalc_rate = clk_pwm_recalc_rate,
.get_duty_cycle = clk_pwm_get_duty_cycle,
}; };
static int clk_pwm_probe(struct platform_device *pdev) static int clk_pwm_probe(struct platform_device *pdev)