Messages in this thread | | | Date | Fri, 20 Jan 2012 19:38:54 +0100 | From | Lars-Peter Clausen <> | Subject | Re: [PATCH] leds-lm3530: set the value of max_brightness to 127 |
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On 01/20/2012 06:34 PM, Kim, Milo wrote: > Only 7 bits are used for the brightness. (register address : A0h) > So the max_brightness property of lm3530 should be set to 127. > > On initializing registers, maximum initial brightness is limited to 'max_brightness'. > > Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> > Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Uhm, I might have suggested this, but I've definitely not yet reviewed this patch. Please don't add tags for other people unless they have explicitly given you that tag.
> --- > drivers/leds/leds-lm3530.c | 7 +++++++ > 1 files changed, 7 insertions(+), 0 deletions(-) > > diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c > index 4d7ce76..dce6c2a 100644 > --- a/drivers/leds/leds-lm3530.c > +++ b/drivers/leds/leds-lm3530.c > @@ -80,6 +80,9 @@ > #define LM3530_DEF_ZT_3 (0x66) > #define LM3530_DEF_ZT_4 (0x7F) > > +/* 7 bits are used for the brightness : LM3530_BRT_CTRL_REG */ > +#define MAX_BRIGHTNESS (127) > + > struct lm3530_mode_map { > const char *mode; > enum lm3530_mode mode_val; > @@ -184,6 +187,9 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) > else > brightness = drvdata->brightness = pltfm->brt_val; > > + if (brightness > drvdata->led_dev.max_brightness) > + brightness = drvdata->led_dev.max_brightness; > + > reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */ > reg_val[1] = als_config; /* LM3530_ALS_CONFIG */ > reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */ > @@ -340,6 +346,7 @@ static int __devinit lm3530_probe(struct i2c_client *client, > drvdata->enable = false; > drvdata->led_dev.name = LM3530_LED_DEV; > drvdata->led_dev.brightness_set = lm3530_brightness_set; > + drvdata->led_dev.max_brightness = MAX_BRIGHTNESS; > > i2c_set_clientdata(client, drvdata); >
You should also remove the division by two. max_brightness is supposed to be the maximum value which the brightness value can be set to.
- Lars
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