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[6/9] pwm i.MX: use per clock unconditionally

Message ID 1346935695-25179-7-git-send-email-s.hauer@pengutronix.de
State New
Headers show

Commit Message

Sascha Hauer Sept. 6, 2012, 12:48 p.m. UTC 
The i.MX pwm core 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>
---
 drivers/pwm/pwm-imx.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)
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Patch

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 675e2bb..ea4ab2c 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -131,16 +131,11 @@  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;