diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2012-08-28 12:03:29 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@avionic-design.de> | 2012-09-12 14:25:06 +0200 |
| commit | 8d1c24bfd20829f5943c76b85c4973db264dd666 (patch) | |
| tree | 1f2b14fe60d88e63dd8919683213014f64d52641 /drivers/pwm | |
| parent | 479e2e301c626cc64fb27b6b1938655eaba8b036 (diff) | |
| download | op-kernel-dev-8d1c24bfd20829f5943c76b85c4973db264dd666.zip op-kernel-dev-8d1c24bfd20829f5943c76b85c4973db264dd666.tar.gz | |
pwm: i.MX: use per clock unconditionally
The i.MX PWM module has two clocks: The ipg clock and the ipg highfreq
(peripheral) clock. The ipg clock has to be enabled for this hardware
to work. The actual PWM output can either be driven by the ipg clock
or the ipg highfreq. The ipg highfreq has the advantage that it runs
even when the SoC is in low power modes.
Use the always running clock also on i.MX25.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-imx.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c index 0f6c436..852de6c 100644 --- a/drivers/pwm/pwm-imx.c +++ b/drivers/pwm/pwm-imx.c @@ -17,7 +17,6 @@ #include <linux/io.h> #include <linux/pwm.h> #include <linux/of_device.h> -#include <mach/hardware.h> /* i.MX1 and i.MX21 share the same PWM function block: */ @@ -133,16 +132,11 @@ static int imx_pwm_config_v2(struct pwm_chip *chip, cr = MX3_PWMCR_PRESCALER(prescale) | MX3_PWMCR_DOZEEN | MX3_PWMCR_WAITEN | - MX3_PWMCR_DBGEN; + MX3_PWMCR_DBGEN | MX3_PWMCR_CLKSRC_IPG_HIGH; if (imx->enabled) cr |= MX3_PWMCR_EN; - if (cpu_is_mx25()) - cr |= MX3_PWMCR_CLKSRC_IPG; - else - cr |= MX3_PWMCR_CLKSRC_IPG_HIGH; - writel(cr, imx->mmio_base + MX3_PWMCR); return 0; |
