Messages in this thread | | | Date | Wed, 15 Nov 2017 22:12:36 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH v3 2/2] leds: lm3692x: Introduce LM3692x dual string driver |
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Hi!
> Introducing the LM3692x Dual-String white LED driver. > > Data sheet is located
"located at"? (Twice.)
> http://www.ti.com/lit/ds/snvsa29/snvsa29.pdf > > Signed-off-by: Dan Murphy <dmurphy@ti.com>
> +config LEDS_LM3692X > + tristate "LED support for LM3692x Chips" > + depends on LEDS_CLASS && I2C > + select REGMAP_I2C > + help > + This option enables support for the TI LM3692x family > + of LED drivers.
"If unsure ..., module will be named..."
Might want to say this is for backlight LEDs here.
> +static int lm3692x_fault_check(struct lm3692x_led *led) > +{ > + int ret, fault; > + unsigned int read_buf; > + > + ret = regmap_read(led->regmap, LM3692X_FAULT_FLAGS, &read_buf); > + if (ret) > + return ret; > + > + fault = read_buf; > + > + if (fault) > + dev_err(&led->client->dev, "Detected a fault 0x%X\n", > + fault); > + > + return ret; > +}
Get rid of "fault" variable?
Does fault need to be propagated to the caller?
> +static int lm3692x_init(struct lm3692x_led *led) > +{ > + int ret; > + > + if (led->regulator) { > + ret = regulator_enable(led->regulator); > + if (ret) > + dev_err(&led->client->dev, > + "Failed to enable regulator\n"); > + goto out; > + } > + > + if (led->enable_gpio) > + gpiod_direction_output(led->enable_gpio, 1); > + > + ret = lm3692x_fault_check(led); > + if (ret) { > + dev_err(&led->client->dev, "Cannot read/clear faults\n"); > + goto out; > + } > + > + ret = regmap_write(led->regmap, LM3692X_BRT_CTRL, 0x00); > + if (ret) { > + dev_err(&led->client->dev, "Fail writing BRT CTRL\n"); > + goto out; > + }
How often are those fails reached? Maybe regmap wrapper that would print "reading/writing register XY failed" would be enough?
Otherwise looks good,
Acked-by: Pavel Machek <pavel@ucw.cz> Pavel
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html [unhandled content-type:application/pgp-signature] | |