hi Krzysztof,
On Fri, 3 Jul 2020 at 22:13, Krzysztof Kozlowski <k...@kernel.org> wrote:
>
> On Fri, Jul 03, 2020 at 01:20:12PM +0000, Anand Moon wrote:
> > User readl_poll_timeout function instead of open
> > coded handling in crport_handshake function.
> >
> > Signed-off-by: Anand Moon <linux.am...@gmail.com>
> > ---
> > drivers/phy/samsung/phy-exynos5-usbdrd.c | 37 +++++++++---------------
> > 1 file changed, 13 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c
> > b/drivers/phy/samsung/phy-exynos5-usbdrd.c
> > index e510732afb8b..83274c5e3820 100644
> > --- a/drivers/phy/samsung/phy-exynos5-usbdrd.c
> > +++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c
> > @@ -16,6 +16,7 @@
> > #include <linux/of.h>
> > #include <linux/of_address.h>
> > #include <linux/of_device.h>
> > +#include <linux/iopoll.h>
> > #include <linux/phy/phy.h>
> > #include <linux/platform_device.h>
> > #include <linux/mutex.h>
> > @@ -556,40 +557,28 @@ static int exynos5_usbdrd_phy_power_off(struct phy
> > *phy)
> > static int crport_handshake(struct exynos5_usbdrd_phy *phy_drd,
> > u32 val, u32 cmd)
> > {
> > - u32 usec = 100;
> > + u32 timeout_us = 1000, sleep_us = 10;
> > unsigned int result;
>
> You silently (without mentioning in commit msg and explaining why)
> changed both the sleep time and total timeout.
>
Ok I will stick with the original default value.
timeout_us = 100, sleep_us = 1;
> Nope, please explain why you chosen such values and change them in
> separate patch..
I choose these values following Alim Akhtar's UFS PHY patches.
>
> > + int err;
> >
> > writel(val | cmd, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
> >
> > - do {
> > - result = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYREG1);
> > - if (result & PHYREG1_CR_ACK)
> > - break;
> > -
> > - udelay(1);
> > - } while (usec-- > 0);
> > -
> > - if (!usec) {
> > - dev_err(phy_drd->dev,
> > - "CRPORT handshake timeout1 (0x%08x)\n", val);
> > + err = readl_poll_timeout(phy_drd->reg_phy + EXYNOS5_DRD_PHYREG1,
> > + result, (result & PHYREG1_CR_ACK), sleep_us,
> > timeout_us);
> > + if (err) {
> > + dev_err(phy_drd->dev, "CRPORT handshake timeout1 (0x%08x)\n",
> > val);
> > return -ETIME;
> > }
> >
> > - usec = 100;
> > + timeout_us = 1000;
> > + sleep_us = 10;
>
> The same.
>
> Best regards,
> Krzysztof
>
Best regards,
-Anand
