Messages in this thread Patch in this message | | | From | Stefan Agner <> | Subject | [PATCH] pwm: imx: keep peripheral clock enabled during register access | Date | Thu, 29 Dec 2016 15:10:41 +0100 |
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On some platforms (i.MX 7) the peripheral clock is required during register access. Make sure that the clock is kept enabled when accessing registers.
Signed-off-by: Stefan Agner <stefan@agner.ch> --- Hi Thierry, hi Lukasz,
This patch applies ontop of Lukasz "pwm: imx: Provide atomic operation for IMX PWM driver" patchset. With that, my expressed concern to patch 2 is solved.
-- Stefan
drivers/pwm/pwm-imx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c index a21463436aa4..fbd997514a87 100644 --- a/drivers/pwm/pwm-imx.c +++ b/drivers/pwm/pwm-imx.c @@ -192,7 +192,7 @@ static int imx_pwm_apply_v2(struct pwm_chip *chip, struct pwm_device *pwm, period_cycles = 0; /* Enable the clock if the PWM is being enabled. */ - if (state->enabled && !cstate.enabled) { + if (!cstate.enabled) { ret = clk_prepare_enable(imx->clk_per); if (ret) return ret; @@ -223,7 +223,7 @@ static int imx_pwm_apply_v2(struct pwm_chip *chip, struct pwm_device *pwm, writel(cr, imx->mmio_base + MX3_PWMCR); /* Disable the clock if the PWM is being disabled. */ - if (!state->enabled && cstate.enabled) + if (!state->enabled) clk_disable_unprepare(imx->clk_per); return 0; -- 2.11.0
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