From: Linus Walleij <[email protected]> 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 <[email protected]> Signed-off-by: Linus Walleij <[email protected]> --- Hi Mark, this was especially tricky due to the absence of a function to get a named regulator without a device node. After some cleverness introducing a node for the board akin to the solution I did for Nomadik, this seems to be an acceptable way forward, any other suggestions welcome. --- Documentation/devicetree/bindings/arm/ste-u300.txt | 13 +++++++ arch/arm/mach-u300/regulator.c | 42 ++++++++++++++++++++-- 2 files changed, 52 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/arm/ste-u300.txt b/Documentation/devicetree/bindings/arm/ste-u300.txt index 222dca5..cd9001a 100644 --- a/Documentation/devicetree/bindings/arm/ste-u300.txt +++ b/Documentation/devicetree/bindings/arm/ste-u300.txt @@ -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>; +}; diff --git a/arch/arm/mach-u300/regulator.c b/arch/arm/mach-u300/regulator.c index 9c53f01..8a67dc6 100644 --- a/arch/arm/mach-u300/regulator.c +++ b/arch/arm/mach-u300/regulator.c @@ -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); -- 1.7.11.3 _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
