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ARM: u300: set up board power from device tree

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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: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2013-04-19 10:50:42 +02:00
parent ae87bb8ef7
commit 4d3ab5ec20
2 changed files with 52 additions and 3 deletions
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13
Documentation/devicetree/bindings/arm/ste-u300.txt
View File

@ -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>;
};

42
arch/arm/mach-u300/regulator.c
View File

@ -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");
main_power_15 = regulator_get(NULL, "vana15");
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);