From patchwork Thu Sep 6 12:48:12 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [6/9] pwm i.MX: use per clock unconditionally Date: Thu, 06 Sep 2012 02:48:12 -0000 From: Sascha Hauer X-Patchwork-Id: 182178 Message-Id: <1346935695-25179-7-git-send-email-s.hauer@pengutronix.de> To: Cc: Sascha Hauer , thierry.reding@avionic-design.de, linux-kernel@vger.kernel.org, =?UTF-8?q?Beno=C3=AEt=20Th=C3=A9baudeau?= , kernel@pengutronix.de, HACHIMI Samir , shawn.guo@linaro.org 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 Reviewed-by: Shawn Guo Reviewed-by: Benoît Thébaudeau --- drivers/pwm/pwm-imx.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) 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;