Messages in this thread | | | From | Philippe Rétornaz <> | Subject | Re: [PATCH 1/2] mc13783: add LED support | Date | Tue, 18 May 2010 13:27:29 +0200 |
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Le lundi, 17 mai 2010 21.02:42, Uwe Kleine-König a écrit : > Hi Philippe, > > On Mon, May 17, 2010 at 06:40:22PM +0200, Philippe Rétornaz wrote: > > This adds basic led support for Freescale MC13783 PMIC. > > > > Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch> > > --- > > drivers/leds/Kconfig | 7 + > > drivers/leds/Makefile | 1 + > > drivers/leds/leds-mc13783.c | 375 > > +++++++++++++++++++++++++++++++++++++++++++ drivers/mfd/mc13783-core.c | > > 4 + > > include/linux/mfd/mc13783.h | 68 ++++++++ > > 5 files changed, 455 insertions(+), 0 deletions(-) > > create mode 100644 drivers/leds/leds-mc13783.c > > > > +++ b/drivers/leds/leds-mc13783.c > > @@ -0,0 +1,375 @@ > > +#include <linux/module.h> > > +#include <linux/kernel.h> > > +#include <linux/init.h> > > +#include <linux/platform_device.h> > > +#include <linux/leds.h> > > +#include <linux/workqueue.h> > > +#include <linux/mfd/mc13783.h> > > +#include <linux/mfd/mc13783-private.h> > > please don't use mc13783-private.h.
I use some register macro defined in mc13783-private.h Do you perfer I redefine them inside leds-mc13783.c ?
> > +static void mc13783_led_set(struct led_classdev *led_cdev, > > + enum led_brightness value) > > +{ > > + struct mc13783_led *led; > > + > > + led = container_of(led_cdev, struct mc13783_led, cdev); > > + led->new_brightness = value; > > + schedule_work(&led->work); > > +} > > I wonder why you don't set the registers directly here, but use a work > struct instead.
As Marc explained, it can be called from interrupt context.
> > +#define BL_C_MASK 0x7 > > +#define MD_C_SHIFT 0 > > +#define AD_C_SHIFT 3 > > +#define KP_C_SHIFT 6 > > +#define TC_C_MASK 0x3 [...] > > +#define TC1HALF_BIT 18 > > +#define SLEWLIM_BIT 23 > > +#define TRIODE_TC_BIT 23 > > +#define TRIODE_MD_BIT 7 > > +#define TRIODE_AD_BIT 8 > > +#define TRIODE_KP_BIT 9 > > +#define BOOST_BIT 10 > > +#define PERIOD_MASK 0x3 > > +#define PERIOD_SHIFT 21 > > +#define ABMODE_MASK 0x7 > > +#define ABMODE_SHIFT 11 > > +#define ABREF_MASK 0x3 > > +#define ABREF_SHIFT 14 > > Why not group the defines at the beginning of the file and properly > namespace them?
Ok, I will define it with the register definition I must add to remove mc13783- private.h inclusion.
[...] > > + ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_2, reg); > > + if (ret) > > + goto out; > > + > > + > > only one empty line please.
Ok.
[...] > > +err_register: > > + if (i > 0) { > > + for (i = i - 1; i >= 0; i--) { > > + led_classdev_unregister(&led[i].cdev); > > + cancel_work_sync(&led[i].work); > > + } > > + } > > the if isn't necessary, just doing for(...) is enough.
You're right i is signed. I will remove it.
> > +MODULE_DESCRIPTION("LEDs driver for Freescale MC13783 PMIC"); > > +MODULE_AUTHOR("Philipe Rétornaz <philippe.retorna@epfl.ch>"); > > Philippe with two p? I'm not sure if non-ASCII chars are allowed here.
What a shame, I'm not able to write my own name !
Thank you for the review, I will post a v2 patch with the appropriates fixes soon.
BTW, should I split this patch in 2 ? One for the mfd device, and one which adds the led driver ? Who will merge this ?
Regards,
Philippe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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