| Message ID | 1477984230-18071-6-git-send-email-l.majewski@majess.pl |
|---|---|
| State | Superseded |
| Headers | show |
On 2016-11-01 00:10, Lukasz Majewski wrote: > The software reset code has been extracted from imx_pwm_config_v2 function > and moved to new one - imx_pwm_sw_reset(). > > This change reduces the overall size of imx_pwm_config_v2() and prepares > it for atomic PWM operation. > > Suggested-by: Stefan Agner <stefan@agner.ch> > Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com> > Signed-off-by: Lukasz Majewski <l.majewski@majess.pl> > Looks good to me: Reviewed-by: Stefan Agner <stefan@agner.ch> > --- > Changes for v3: > - None > > Changes for v2: > - Add missing parenthesis > --- > drivers/pwm/pwm-imx.c | 31 +++++++++++++++++++++---------- > 1 file changed, 21 insertions(+), 10 deletions(-) > > diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c > index 8497902..b4e5803 100644 > --- a/drivers/pwm/pwm-imx.c > +++ b/drivers/pwm/pwm-imx.c > @@ -119,6 +119,25 @@ static void imx_pwm_disable_v1(struct pwm_chip > *chip, struct pwm_device *pwm) > clk_disable_unprepare(imx->clk_per); > } > > +static void imx_pwm_sw_reset(struct pwm_chip *chip) > +{ > + struct imx_chip *imx = to_imx_chip(chip); > + struct device *dev = chip->dev; > + int wait_count = 0; > + u32 cr; > + > + writel(MX3_PWMCR_SWR, imx->mmio_base + MX3_PWMCR); > + do { > + usleep_range(200, 1000); > + cr = readl(imx->mmio_base + MX3_PWMCR); > + } while ((cr & MX3_PWMCR_SWR) && > + (wait_count++ < MX3_PWM_SWR_LOOP)); > + > + if (cr & MX3_PWMCR_SWR) > + dev_warn(dev, "software reset timeout\n"); > +} > + > + > static int imx_pwm_config_v2(struct pwm_chip *chip, > struct pwm_device *pwm, int duty_ns, int period_ns) > { > @@ -128,7 +147,7 @@ static int imx_pwm_config_v2(struct pwm_chip *chip, > unsigned long period_cycles, duty_cycles, prescale; > unsigned int period_ms; > bool enable = pwm_is_enabled(pwm); > - int wait_count = 0, fifoav; > + int fifoav; > u32 cr, sr; > > /* > @@ -151,15 +170,7 @@ static int imx_pwm_config_v2(struct pwm_chip *chip, > dev_warn(dev, "there is no free FIFO slot\n"); > } > } else { > - writel(MX3_PWMCR_SWR, imx->mmio_base + MX3_PWMCR); > - do { > - usleep_range(200, 1000); > - cr = readl(imx->mmio_base + MX3_PWMCR); > - } while ((cr & MX3_PWMCR_SWR) && > - (wait_count++ < MX3_PWM_SWR_LOOP)); > - > - if (cr & MX3_PWMCR_SWR) > - dev_warn(dev, "software reset timeout\n"); > + imx_pwm_sw_reset(chip); > } > > c = clk_get_rate(imx->clk_per); -- To unsubscribe from this list: send the line "unsubscribe linux-pwm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c index 8497902..b4e5803 100644 --- a/drivers/pwm/pwm-imx.c +++ b/drivers/pwm/pwm-imx.c @@ -119,6 +119,25 @@ static void imx_pwm_disable_v1(struct pwm_chip *chip, struct pwm_device *pwm) clk_disable_unprepare(imx->clk_per); } +static void imx_pwm_sw_reset(struct pwm_chip *chip) +{ + struct imx_chip *imx = to_imx_chip(chip); + struct device *dev = chip->dev; + int wait_count = 0; + u32 cr; + + writel(MX3_PWMCR_SWR, imx->mmio_base + MX3_PWMCR); + do { + usleep_range(200, 1000); + cr = readl(imx->mmio_base + MX3_PWMCR); + } while ((cr & MX3_PWMCR_SWR) && + (wait_count++ < MX3_PWM_SWR_LOOP)); + + if (cr & MX3_PWMCR_SWR) + dev_warn(dev, "software reset timeout\n"); +} + + static int imx_pwm_config_v2(struct pwm_chip *chip, struct pwm_device *pwm, int duty_ns, int period_ns) { @@ -128,7 +147,7 @@ static int imx_pwm_config_v2(struct pwm_chip *chip, unsigned long period_cycles, duty_cycles, prescale; unsigned int period_ms; bool enable = pwm_is_enabled(pwm); - int wait_count = 0, fifoav; + int fifoav; u32 cr, sr; /* @@ -151,15 +170,7 @@ static int imx_pwm_config_v2(struct pwm_chip *chip, dev_warn(dev, "there is no free FIFO slot\n"); } } else { - writel(MX3_PWMCR_SWR, imx->mmio_base + MX3_PWMCR); - do { - usleep_range(200, 1000); - cr = readl(imx->mmio_base + MX3_PWMCR); - } while ((cr & MX3_PWMCR_SWR) && - (wait_count++ < MX3_PWM_SWR_LOOP)); - - if (cr & MX3_PWMCR_SWR) - dev_warn(dev, "software reset timeout\n"); + imx_pwm_sw_reset(chip); } c = clk_get_rate(imx->clk_per);
The software reset code has been extracted from imx_pwm_config_v2 function and moved to new one - imx_pwm_sw_reset(). This change reduces the overall size of imx_pwm_config_v2() and prepares it for atomic PWM operation. Suggested-by: Stefan Agner <stefan@agner.ch> Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Lukasz Majewski <l.majewski@majess.pl> --- Changes for v3: - None Changes for v2: - Add missing parenthesis --- drivers/pwm/pwm-imx.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-)