linux-kernel - Patch to add mioa701 glue for voltage regulation

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Date:	Thu, 23 Apr 2009 20:30:44 +0200
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	broonie@...nsource.wolfsonmicro.com, eric.miao@...vell.com
Cc:	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.arm.linux.org.uk, philipp.zabel@...il.com
Subject: Patch to add mioa701 glue for voltage regulation


Hi Mark and Eric,

I have that patch which adds voltage regulation definitions to mioa701
board. The trick is, this patch depends on two others :

 - one which will be merged through Mark's regulator tree.
   This one is mandatory as a compiling dependency exists through include files.

 - one which will be merge through Eric pxa tree.
   This is the cpufreq one, and has a "very weak" dependency, as only the
   "vcc_core" name _is_ the dependency.

I think the easiest way to solve the compiling dependency
(include/linux/regulator.max1586.h) is to make that patch go through regulator
tree as well for linux-next, even if it's arm machine specific, don't you ?

Cheers.

--
Robert

>From 7d3f66dba8875567fd814ea67ed9b0645a4f5f70 Mon Sep 17 00:00:00 2001
From: Robert Jarzmik <robert.jarzmik@...e.fr>
Date: Mon, 20 Apr 2009 16:52:25 +0200
Subject: [PATCH] mioa701: add Maxim 1586 voltage regulator

On this board, the PXA272 CPU voltage VCC_CORE is provided
by a Maxim 1586 voltage regulator. Use the regulator
framework to provide VCC_CORE control. When cpufreq will be
updated to ask for vcc_core, this will optimize power
drained by the board.

Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
---
 arch/arm/mach-pxa/mioa701.c |   52 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 52 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-pxa/mioa701.c b/arch/arm/mach-pxa/mioa701.c
index 204263d..facff90 100644
--- a/arch/arm/mach-pxa/mioa701.c
+++ b/arch/arm/mach-pxa/mioa701.c
@@ -37,6 +37,7 @@
 #include <linux/wm97xx_batt.h>
 #include <linux/mtd/physmap.h>
 #include <linux/usb/gpio_vbus.h>
+#include <linux/regulator/max1586.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -716,6 +717,48 @@ static struct wm97xx_batt_info mioa701_battery_data = {
 };
 
 /*
+ * Voltage regulation
+ */
+static struct regulator_consumer_supply max1586_consumers[] = {
+	{
+		.supply = "vcc_core",
+	}
+};
+
+static struct regulator_init_data max1586_v3_info = {
+	.constraints = {
+		.name = "vcc_core range",
+		.min_uV = 1000000,
+		.max_uV = 1705000,
+		.always_on = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(max1586_consumers),
+	.consumer_supplies = max1586_consumers,
+};
+
+static struct regulator_init_data max1586_v6_info = {
+	.constraints = {
+		.name = "vcc_usim range",
+		.min_uV = 1,
+		.max_uV = 3000000,
+		.always_on = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
+	},
+	.num_consumer_supplies = 0,
+};
+
+static struct max1586_subdev_data max1586_subdevs[] = {
+	{ .name = "vcc_core", .id = MAX1586_V3,
+	  .platform_data = &max1586_v3_info },
+};
+
+static struct max1586_platform_data max1586_info = {
+	.subdevs = max1586_subdevs,
+	.num_subdevs = ARRAY_SIZE(max1586_subdevs),
+};
+
+/*
  * Camera interface
  */
 struct pxacamera_platform_data mioa701_pxacamera_platform_data = {
@@ -733,6 +776,13 @@ static struct i2c_board_info __initdata mioa701_i2c_devices[] = {
 	},
 };
 
+static struct i2c_board_info __initdata mioa701_pi2c_devices[] = {
+	{
+		I2C_BOARD_INFO("max1586", 0x14),
+		.platform_data = &max1586_info,
+	},
+};
+
 static struct soc_camera_link iclink = {
 	.bus_id		= 0, /* Match id in pxa27x_device_camera in device.c */
 	.board_info	= &mioa701_i2c_devices[0],
@@ -827,7 +877,9 @@ static void __init mioa701_machine_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 	gsm_init();
 
+	i2c_register_board_info(1, ARRAY_AND_SIZE(mioa701_pi2c_devices));
 	pxa_set_i2c_info(&i2c_pdata);
+	pxa27x_set_i2c_power_info(NULL);
 	pxa_set_camera_info(&mioa701_pxacamera_platform_data);
 }
 
-- 
1.6.2.1

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