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Commit a8e99850 authored by Vasily Khoruzhick's avatar Vasily Khoruzhick Committed by Ben Dooks
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ARM: S3C2410: H1940: Add battery support 



Add battery monitoring/charging support via pda_power and
s3c_adc_battery drivers

Signed-off-by: default avatarVasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent 50e2d10d

arch/arm/mach-s3c2410/mach-h1940.c

+144 −0
Original line number Diff line number Diff line
@@ -28,6 +28,8 @@ 
#include <linux/pwm_backlight.h>

#include <linux/i2c.h>

#include <linux/leds.h>

#include <linux/pda_power.h>

#include <linux/s3c_adc_battery.h>



#include <video/platform_lcd.h>
@@ -218,6 +220,146 @@ static struct s3c2410fb_mach_info h1940_fb_info __initdata = { 
	.gpdup_mask=	0xffffffff,

};



static int power_supply_init(struct device *dev)

{

	return gpio_request(S3C2410_GPF(2), "cable plugged");

}



static int h1940_is_ac_online(void)

{

	return !gpio_get_value(S3C2410_GPF(2));

}



static void power_supply_exit(struct device *dev)

{

	gpio_free(S3C2410_GPF(2));

}



static char *h1940_supplicants[] = {

	"main-battery",

	"backup-battery",

};



static struct pda_power_pdata power_supply_info = {

	.init			= power_supply_init,

	.is_ac_online		= h1940_is_ac_online,

	.exit			= power_supply_exit,

	.supplied_to		= h1940_supplicants,

	.num_supplicants	= ARRAY_SIZE(h1940_supplicants),

};



static struct resource power_supply_resources[] = {

	[0] = {

			.name	= "ac",

			.flags	= IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE |

					  IORESOURCE_IRQ_HIGHEDGE,

			.start	= IRQ_EINT2,

			.end	= IRQ_EINT2,

	},

};



static struct platform_device power_supply = {

	.name		= "pda-power",

	.id		= -1,

	.dev		= {

				.platform_data =

					&power_supply_info,

	},

	.resource	= power_supply_resources,

	.num_resources	= ARRAY_SIZE(power_supply_resources),

};



static const struct s3c_adc_bat_thresh bat_lut_noac[] = {

	{ .volt = 4070, .cur = 162, .level = 100},

	{ .volt = 4040, .cur = 165, .level = 95},

	{ .volt = 4016, .cur = 164, .level = 90},

	{ .volt = 3996, .cur = 166, .level = 85},

	{ .volt = 3971, .cur = 168, .level = 80},

	{ .volt = 3951, .cur = 168, .level = 75},

	{ .volt = 3931, .cur = 170, .level = 70},

	{ .volt = 3903, .cur = 172, .level = 65},

	{ .volt = 3886, .cur = 172, .level = 60},

	{ .volt = 3858, .cur = 176, .level = 55},

	{ .volt = 3842, .cur = 176, .level = 50},

	{ .volt = 3818, .cur = 176, .level = 45},

	{ .volt = 3789, .cur = 180, .level = 40},

	{ .volt = 3769, .cur = 180, .level = 35},

	{ .volt = 3749, .cur = 184, .level = 30},

	{ .volt = 3732, .cur = 184, .level = 25},

	{ .volt = 3716, .cur = 184, .level = 20},

	{ .volt = 3708, .cur = 184, .level = 15},

	{ .volt = 3716, .cur = 96, .level = 10},

	{ .volt = 3700, .cur = 96, .level = 5},

	{ .volt = 3684, .cur = 96, .level = 0},

};



static const struct s3c_adc_bat_thresh bat_lut_acin[] = {

	{ .volt = 4130, .cur = 0, .level = 100},

	{ .volt = 3982, .cur = 0, .level = 50},

	{ .volt = 3854, .cur = 0, .level = 10},

	{ .volt = 3841, .cur = 0, .level = 0},

};



int h1940_bat_init(void)

{

	int ret;



	ret = gpio_request(H1940_LATCH_SM803_ENABLE, "h1940-charger-enable");

	if (ret)

		return ret;

	gpio_direction_output(H1940_LATCH_SM803_ENABLE, 0);



	return 0;



}



void h1940_bat_exit(void)

{

	gpio_free(H1940_LATCH_SM803_ENABLE);

}



void h1940_enable_charger(void)

{

	gpio_set_value(H1940_LATCH_SM803_ENABLE, 1);

}



void h1940_disable_charger(void)

{

	gpio_set_value(H1940_LATCH_SM803_ENABLE, 0);

}



static struct s3c_adc_bat_pdata h1940_bat_cfg = {

	.init = h1940_bat_init,

	.exit = h1940_bat_exit,

	.enable_charger = h1940_enable_charger,

	.disable_charger = h1940_disable_charger,

	.gpio_charge_finished = S3C2410_GPF(3),

	.gpio_inverted = 1,

	.lut_noac = bat_lut_noac,

	.lut_noac_cnt = ARRAY_SIZE(bat_lut_noac),

	.lut_acin = bat_lut_acin,

	.lut_acin_cnt = ARRAY_SIZE(bat_lut_acin),

	.volt_channel = 0,

	.current_channel = 1,

	.volt_mult = 4056,

	.current_mult = 1893,

	.internal_impedance = 200,

	.backup_volt_channel = 3,

	/* TODO Check backup volt multiplier */

	.backup_volt_mult = 4056,

	.backup_volt_min = 0,

	.backup_volt_max = 4149288

};



static struct platform_device h1940_battery = {

	.name             = "s3c-adc-battery",

	.id               = -1,

	.dev = {

		.parent = &s3c_device_adc.dev,

		.platform_data = &h1940_bat_cfg,

	},

};



DEFINE_SPINLOCK(h1940_blink_spin);



int h1940_led_blink_set(unsigned gpio, int state,
@@ -498,6 +640,8 @@ static struct platform_device *h1940_devices[] __initdata = { 
	&h1940_lcd_powerdev,

	&s3c_device_adc,

	&s3c_device_ts,

	&power_supply,

	&h1940_battery,

};



static void __init h1940_map_io(void)