[patch v4 06/10] efikamx: add leds support

[Uwe Kleine-König]

Hello,

On Sat, Oct 30, 2010 at 09:54:47AM +0200, Marek Vasut wrote:
> On Wednesday 27 October 2010 14:40:51 Arnaud Patard wrote:
> > The efika mx a 3 leds (1 blue, 1 red, 1 green) connected on GPIOS 3
> > 13/14/15. Also, some special care is done for default trigger of blue led
> > for mmc as the mmc host used is different between hw revisions
> > 
> > Signed-off-by: Arnaud Patard <arnaud.patard at rtp-net.org>
> > Index: linux-2.6-submit/arch/arm/mach-mx5/board-mx51_efikamx.c
> > ===================================================================
> > --- linux-2.6-submit.orig/arch/arm/mach-mx5/board-mx51_efikamx.c	2010-10-27
> > 11:26:16.000000000 +0200 +++
> > linux-2.6-submit/arch/arm/mach-mx5/board-mx51_efikamx.c	2010-10-27
> > 11:27:38.000000000 +0200 @@ -18,6 +18,7 @@
> >  #include <linux/platform_device.h>
> >  #include <linux/i2c.h>
> >  #include <linux/gpio.h>
> > +#include <linux/leds.h>
> >  #include <linux/delay.h>
> >  #include <linux/io.h>
> >  #include <linux/fsl_devices.h>
> > @@ -43,6 +44,10 @@
> >  #define EFIKAMX_PCBID1		(2*32 + 17)
> >  #define EFIKAMX_PCBID2		(2*32 + 11)
> > 
> > +#define EFIKAMX_BLUE_LED	(2*32 + 13)
> > +#define EFIKAMX_GREEN_LED	(2*32 + 14)
> > +#define EFIKAMX_RED_LED		(2*32 + 15)
> > +
> >  /* the pci ids pin have pull up. they're driven low according to board id
> > */ #define MX51_PAD_PCBID0	IOMUX_PAD(0x518, 0x130, 3, 0x0,   0,
> > PAD_CTL_PUS_100K_UP) #define MX51_PAD_PCBID1	IOMUX_PAD(0x51C, 0x134, 3,
> > 0x0,   0, PAD_CTL_PUS_100K_UP) @@ -81,6 +86,11 @@
> >  	MX51_PAD_GPIO_1_1__ESDHC1_WP,
> >  	MX51_PAD_GPIO_1_7__ESDHC2_WP,
> >  	MX51_PAD_GPIO_1_8__ESDHC2_CD,
> > +
> > +	/* leds */
> > +	MX51_PAD_CSI1_D9__GPIO_3_13,
> > +	MX51_PAD_CSI1_VSYNC__GPIO_3_14,
> > +	MX51_PAD_CSI1_HSYNC__GPIO_3_15,
> >  };
> > 
> >  /* Serial ports */
> > @@ -179,6 +189,37 @@
> >  	}
> >  }
> 
> Maybe this could be modularized ?
> 
> #ifdef CONFIG_LEDS_GPIO
> ... the platform_data stuff below ...
> 
> efikamx_register_leds()
> {
> 	platform_device_register();
> }
> #else
> static inline void efikamx_register_leds() {}
> #endif
> 
> board_init()
> {
> ...
> efikamx_register_leds();
> ...
> }
> 
> What do you think ? Cheers
IMHO it's better to register all devices independently of the available
drivers.  So for me the used approach is OK.

Best regards
Uwe

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Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |