On Wed 20 Jun 04:00 PDT 2018, kgunda@xxxxxxxxxxxxxx wrote: > On 2018-06-20 10:44, Bjorn Andersson wrote: > > On Tue 19 Jun 04:13 PDT 2018, Kiran Gunda wrote: > > > > > WLED4 peripheral is present on some PMICs like pmi8998 and > > > pm660l. It has a different register map and configurations > > > are also different. Add support for it. > > > > > > Signed-off-by: Kiran Gunda <kgunda@xxxxxxxxxxxxxx> > > > --- > > > drivers/video/backlight/qcom-wled.c | 635 > > > ++++++++++++++++++++++++++++-------- > > > 1 file changed, 503 insertions(+), 132 deletions(-) > > > > Split this further into a patch that does structural preparation of > > WLED3 support and then an addition of WLED4, the mixture makes parts of > > this patch almost impossible to review. Please find some comments below. > > > Sure. I will split it in the next series. Thanks! > > > > > > diff --git a/drivers/video/backlight/qcom-wled.c > > > b/drivers/video/backlight/qcom-wled.c > > [..] > > > > > > /* WLED3 sink registers */ > > > #define WLED3_SINK_REG_SYNC 0x47 > > > > Drop the 3 from this if it's common between the two. > > > > > -#define WLED3_SINK_REG_SYNC_MASK 0x07 > > > +#define WLED3_SINK_REG_SYNC_MASK GENMASK(2, 0) > > > +#define WLED4_SINK_REG_SYNC_MASK GENMASK(3, 0) > > > #define WLED3_SINK_REG_SYNC_LED1 BIT(0) > > > #define WLED3_SINK_REG_SYNC_LED2 BIT(1) > > > #define WLED3_SINK_REG_SYNC_LED3 BIT(2) > > > +#define WLED4_SINK_REG_SYNC_LED4 BIT(3) > > > #define WLED3_SINK_REG_SYNC_ALL 0x07 > > > +#define WLED4_SINK_REG_SYNC_ALL 0x0f > > > #define WLED3_SINK_REG_SYNC_CLEAR 0x00 > > > > > [..] > > > +static int wled4_set_brightness(struct wled *wled, u16 brightness) > > > > Afaict this is identical to wled3_set_brightness() with the exception > > that there's a minimum brightness and the base address for the > > brightness registers are different. > > > > I would suggest that you add a min_brightness to wled and that you > > figure out a way to carry the brightness base register address; and by > > that you squash these two functions. > > > There are four different parameters. 1) minimum brightness 2) WLED base > addresses > 3) Brightness base addresses 4) the brightness sink registers address > offsets also > different for wled 3 and wled4. (in wled3 0x40, 0x42, 0x44, where as in > wled4 0x57, 0x67, 0x77, 0x87). > Sorry, I must have gotten lost in the defines, I see the difference between the two register layouts now. If you retain the old mechanism of doing the math openly in the function this would have been obvious. > Irrelevant to this patch, but wled5 has some more extra registers to > set the brightness. Keeping this in mind, it is better to have > separate functions? Otherwise we will have to use the version checks > in the wled_set_brightness function, if we have the common function. Okay, so it sounds reasonable to split this out to some degree. Regards, Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
