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authorSascha Hauer <s.hauer@pengutronix.de>2012-08-28 12:03:29 +0200
committerThierry Reding <thierry.reding@avionic-design.de>2012-09-12 14:25:06 +0200
commit8d1c24bfd20829f5943c76b85c4973db264dd666 (patch)
tree1f2b14fe60d88e63dd8919683213014f64d52641 /drivers/pwm/pwm-imx.c
parent479e2e301c626cc64fb27b6b1938655eaba8b036 (diff)
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/pwm-imx.c')
-rw-r--r--drivers/pwm/pwm-imx.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 0f6c436c0632..852de6ce6e11 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;

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