[U-Boot] [RFC PATCH] TWL4030: make LEDs selectable in twl4030_led_init()

[Tom <Tom.Rix@windriver.com>]

Grazvydas Ignotas wrote:
> Not all boards have both LEDs hooked, so enabling both on
> boards with single LED will just waste power.
>

This looks like a pandora specific change.
Please say something like, "For Pandora, only 1 led is required.. "

In some cases, the twl4030 led is the only led for the board.
In this case, it would be good if the twl4030 led was hooked into
the status led functionality.  There is already an interface to
turning led's on and off.

> Make it possible to choose LEDs by adding arguments to
> twl4030_led_init().
> 
> Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
> ---
>  board/logicpd/zoom1/zoom1.c         |    2 +-
>  board/logicpd/zoom2/zoom2.c         |    2 +-
>  board/overo/overo.c                 |    2 +-
>  board/pandora/pandora.c             |    2 +-
>  board/ti/beagle/beagle.c            |    2 +-
>  board/timll/devkit8000/devkit8000.c |    2 +-
>  drivers/misc/twl4030_led.c          |   11 +++++++----
>  include/twl4030.h                   |    2 +-
>  8 files changed, 14 insertions(+), 11 deletions(-)
> 
> diff --git a/board/logicpd/zoom1/zoom1.c b/board/logicpd/zoom1/zoom1.c
> index f4d3754..093b1bf 100644
> --- a/board/logicpd/zoom1/zoom1.c
> +++ b/board/logicpd/zoom1/zoom1.c
> @@ -62,7 +62,7 @@ int board_init(void)
>  int misc_init_r(void)
>  {
>  	twl4030_power_init();
> -	twl4030_led_init();
> +	twl4030_led_init(1, 1);

I do not like passing in immediates.

>  	dieid_num_r();
>  
>  	/*
> diff --git a/board/logicpd/zoom2/zoom2.c b/board/logicpd/zoom2/zoom2.c
> index dadbeb6..c93aeec 100644
> --- a/board/logicpd/zoom2/zoom2.c
> +++ b/board/logicpd/zoom2/zoom2.c
> @@ -148,7 +148,7 @@ int misc_init_r(void)
>  {
>  	zoom2_identify();
>  	twl4030_power_init();
> -	twl4030_led_init();
> +	twl4030_led_init(1, 1);
>  	dieid_num_r();
>  
>  	/*
> diff --git a/board/overo/overo.c b/board/overo/overo.c
> index d42dc13..29600b0 100644
> --- a/board/overo/overo.c
> +++ b/board/overo/overo.c
> @@ -67,7 +67,7 @@ int board_init(void)
>  int misc_init_r(void)
>  {
>  	twl4030_power_init();
> -	twl4030_led_init();
> +	twl4030_led_init(1, 1);
>  
>  #if defined(CONFIG_CMD_NET)
>  	setup_net_chip();
> diff --git a/board/pandora/pandora.c b/board/pandora/pandora.c
> index 460ed12..c8007dc 100644
> --- a/board/pandora/pandora.c
> +++ b/board/pandora/pandora.c
> @@ -66,7 +66,7 @@ int misc_init_r(void)
>  	struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
>  
>  	twl4030_power_init();
> -	twl4030_led_init();
> +	twl4030_led_init(0, 1);
>  
>  	/* Configure GPIOs to output */
>  	writel(~(GPIO14 | GPIO15 | GPIO16 | GPIO23), &gpio1_base->oe);
> diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
> index 32d501e..87c9b0f 100644
> --- a/board/ti/beagle/beagle.c
> +++ b/board/ti/beagle/beagle.c
> @@ -107,7 +107,7 @@ int misc_init_r(void)
>  	struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
>  
>  	twl4030_power_init();
> -	twl4030_led_init();
> +	twl4030_led_init(1, 1);
>  
>  	/* Configure GPIOs to output */
>  	writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
> diff --git a/board/timll/devkit8000/devkit8000.c b/board/timll/devkit8000/devkit8000.c
> index db7d2e2..7eb7793 100644
> --- a/board/timll/devkit8000/devkit8000.c
> +++ b/board/timll/devkit8000/devkit8000.c
> @@ -76,7 +76,7 @@ int misc_init_r(void)
>  
>  	twl4030_power_init();
>  #ifdef CONFIG_TWL4030_LED
> -	twl4030_led_init();
> +	twl4030_led_init(1, 1);
>  #endif
>  
>  #ifdef CONFIG_DRIVER_DM9000
> diff --git a/drivers/misc/twl4030_led.c b/drivers/misc/twl4030_led.c
> index bfdafef..9e945a4 100644
> --- a/drivers/misc/twl4030_led.c
> +++ b/drivers/misc/twl4030_led.c
> @@ -39,12 +39,15 @@
>  #define LEDAPWM			(0x1 << 4)
>  #define LEDBPWM			(0x1 << 5)
>  
> -void twl4030_led_init(void)
> +void twl4030_led_init(int leda_on, int ledb_on)
>  {

This must change to passing in a #defin-ed parameters.
This can be something like

void twl4030_led_init(unsigned char ledon)

where ledon can be

at most (LEDAON | LEDBON)

Export LEDAON and LEDBON so the namespace is ok.
Something like TWL4030_LED_LEDEN_LEDAON etc should be added to
twl4030.h

> -	unsigned char byte;
> +	unsigned char byte = 0;
>  
> -	/* enable LED */
> -	byte = LEDBPWM | LEDAPWM | LEDBON | LEDAON;
> +	/* enable LEDs */
> +	if (leda_on)
> +		byte |= LEDAPWM | LEDAON;
> +	if (ledb_on)
> +		byte |= LEDBPWM | LEDBON;
>  
>  	twl4030_i2c_write_u8(TWL4030_CHIP_LED, byte,
>  			     TWL4030_LED_LEDEN);
> diff --git a/include/twl4030.h b/include/twl4030.h
> index f260ecb..82b3682 100644
> --- a/include/twl4030.h
> +++ b/include/twl4030.h
> @@ -396,6 +396,6 @@ void twl4030_power_mmc_init(void);
>  /*
>   * LED
>   */
> -void twl4030_led_init(void);
> +void twl4030_led_init(int leda_on, int ledb_on);
>  
>  #endif /* TWL4030_H */