From 4c34282fb7d7a1d47a4d901554b574ea6b256cd5 Mon Sep 17 00:00:00 2001 From: Martin Blumenstingl Date: Sat, 25 May 2019 20:42:53 +0200 Subject: [PATCH] clk: pwm: implement the .get_duty_cycle callback Commit 9fba738a53dda2 ("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 Signed-off-by: Stephen Boyd --- drivers/clk/clk-pwm.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/clk/clk-pwm.c b/drivers/clk/clk-pwm.c index 02b472a1f9b0..c0cd6a0ff7f8 100644 --- a/drivers/clk/clk-pwm.c +++ b/drivers/clk/clk-pwm.c @@ -47,10 +47,24 @@ static unsigned long clk_pwm_recalc_rate(struct clk_hw *hw, 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 = { .prepare = clk_pwm_prepare, .unprepare = clk_pwm_unprepare, .recalc_rate = clk_pwm_recalc_rate, + .get_duty_cycle = clk_pwm_get_duty_cycle, }; static int clk_pwm_probe(struct platform_device *pdev)