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Commit 4d3ab5ec authored by Linus Walleij's avatar Linus Walleij
Browse files

ARM: u300: set up board power from device tree 



This adds support for setting up the board power from the
device tree on the U300. We use a board-specific node in the
device tree for the S365 board and bind a regulator for the
board power to this node.

Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent ae87bb8e

Documentation/devicetree/bindings/arm/ste-u300.txt

+13 −0
Original line number Diff line number Diff line
@@ -7,3 +7,16 @@ or board power regulator supplies. 
Required root node property:



compatible="stericsson,u300";



Boards with the U300 SoC include:



S365 "Small Board U365":



Required node: s365



Example:



s365 {

	compatible = "stericsson,s365";

	vana15-supply = <&ab3100_ldo_d_reg>;

};

arch/arm/mach-u300/regulator.c

+39 −3
Original line number Diff line number Diff line
@@ -10,9 +10,14 @@ 
#include <linux/device.h>

#include <linux/signal.h>

#include <linux/err.h>

#include <linux/of.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/consumer.h>

/* Those are just for writing in syscon */

#include <linux/io.h>

#include <asm/mach-types.h>

#include <mach/hardware.h>

#include <mach/syscon.h>
@@ -47,13 +52,17 @@ void u300_pm_poweroff(void) 
/*

 * Hog the regulators needed to power up the board.

 */

static int __init u300_init_boardpower(void)

static int __init __u300_init_boardpower(struct platform_device *pdev)

{

	int err;

	u32 val;



	pr_info("U300: setting up board power\n");

	if (pdev)

		main_power_15 = regulator_get(&pdev->dev, "vana15");

	else

		main_power_15 = regulator_get(NULL, "vana15");



	if (IS_ERR(main_power_15)) {

		pr_err("could not get vana15");

		return PTR_ERR(main_power_15);
@@ -82,7 +91,34 @@ static int __init u300_init_boardpower(void) 
	return 0;

}



static int __init s365_board_probe(struct platform_device *pdev)

{

	return __u300_init_boardpower(pdev);

}



static const struct of_device_id s365_board_match[] = {

	{ .compatible = "stericsson,s365" },

	{},

};



static struct platform_driver s365_board_driver = {

	.driver		= {

		.name   = "s365-board",

		.owner  = THIS_MODULE,

		.of_match_table = s365_board_match,

	},

};



/*

 * So at module init time we hog the regulator!

 */

module_init(u300_init_boardpower);
 
static int __init u300_init_boardpower(void)

{

	if (of_have_populated_dt())

		return platform_driver_probe(&s365_board_driver,

					     s365_board_probe);

	/* Only call this on non-DT boots */

	return __u300_init_boardpower(NULL);

}



device_initcall(u300_init_boardpower);