diff options
| author |   Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2019-05-25 20:42:53 +0200 |
|---|---|---|
| committer |   Stephen Boyd <sboyd@kernel.org> | 2019-06-06 11:31:03 -0700 |
| commit | 4c34282fb7d7a1d47a4d901554b574ea6b256cd5 (patch) | |
| tree | a128f2fe524687e0645927e65ba28dab85777d88 /drivers/clk/clk-pwm.c | |
| parent | Linux 5.2-rc1 (diff) | |
| download | wireguard-linux-4c34282fb7d7a1d47a4d901554b574ea6b256cd5.tar.xz wireguard-linux-4c34282fb7d7a1d47a4d901554b574ea6b256cd5.zip | |
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 <martin.blumenstingl@googlemail.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/clk-pwm.c')
| -rw-r--r-- | drivers/clk/clk-pwm.c | 14 |
1 files changed, 14 insertions, 0 deletions
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) |