[patch 3/5] efikamx: add mc13892 support / implement power off

[Sascha Hauer]

Hi Arnaud,

On Wed, Feb 02, 2011 at 12:21:07PM +0100, Arnaud Patard wrote:
> This patch declares regulators for the efikamx. Use it also to power off the
> efikamx.
> Unfortunately, on the efikamx to2 boards, this doesn't work but they allow to
> power off by setting GPIO 4 13 to high level instead of powering off through
> the mc13892.
> 
> 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	2011-02-02 09:57:51.000000000 +0100
> +++ linux-2.6-submit/arch/arm/mach-mx5/board-mx51_efikamx.c	2011-02-02 09:59:43.000000000 +0100
> @@ -25,6 +25,9 @@
>  #include <linux/fsl_devices.h>
>  #include <linux/spi/flash.h>
>  #include <linux/spi/spi.h>
> +#include <linux/mfd/mc13892.h>
> +#include <linux/regulator/machine.h>
> +#include <linux/regulator/consumer.h>
>  
>  #include <mach/common.h>
>  #include <mach/hardware.h>
> @@ -56,6 +59,10 @@
>  #define EFIKAMX_RESET1_1	IMX_GPIO_NR(3, 2)
>  #define EFIKAMX_RESET		IMX_GPIO_NR(1, 4)
>  
> +#define EFIKAMX_POWEROFF	IMX_GPIO_NR(4, 13)
> +
> +#define EFIKAMX_PMIC		IMX_GPIO_NR(1, 6)
> +
>  /* 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)
> @@ -79,6 +86,9 @@
>  	/* reset */
>  	MX51_PAD_DI1_PIN13__GPIO3_2,
>  	MX51_PAD_GPIO1_4__GPIO1_4,
> +
> +	/* power off */
> +	MX51_PAD_CSI2_VSYNC__GPIO4_13,
>  };
>  
>  /*   PCBID2  PCBID1 PCBID0  STATE
> @@ -187,6 +197,44 @@
>  		gpio_direction_output(EFIKAMX_RESET, 0);
>  }
>  
> +static struct regulator *pwgt1, *pwgt2, *coincell;
> +
> +static void mx51_efikamx_power_off(void)
> +{
> +	if (!IS_ERR(coincell))
> +		regulator_disable(coincell);
> +
> +	if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
> +		regulator_disable(pwgt2);
> +		regulator_disable(pwgt1);
> +	}
> +	gpio_direction_output(EFIKAMX_POWEROFF, 1);
> +}
> +
> +static int __init mx51_efikamx_power_init(void)
> +{
> +	pwgt1 = regulator_get(NULL, "pwgt1");
> +	pwgt2 = regulator_get(NULL, "pwgt2");
> +	if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
> +		regulator_enable(pwgt1);
> +		regulator_enable(pwgt2);
> +	}
> +	gpio_request(EFIKAMX_POWEROFF, "poweroff");
> +	pm_power_off = mx51_efikamx_power_off;
> +
> +	/* enable coincell charger. maybe need a small power driver ? */
> +	coincell = regulator_get(NULL, "coincell");
> +	if (!IS_ERR(coincell)) {
> +		regulator_set_voltage(coincell, 3000000, 3000000);
> +		regulator_enable(coincell);
> +	}
> +
> +	regulator_has_full_constraints();
> +
> +	return 0;
> +}
> +late_initcall(mx51_efikamx_power_init);

Please always protect these board specific initcalls with a
machine_is_*. Just because efikamx support is compiled into the kernel
doesn't mean it's the only machine this kernel will run on.


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