ARM: pxa: magician: Add support for MAX1587A Vcore regulator

HTC Magician contains a MAX1587A voltage regulator for a Vcore supply.
The Vcore regulation is required for a CPU speed switching. This patch adds
declaration for the max1586 driver.

Notice:

- MAX1587A version does not support the V6 (USIM) output.
- A boost resistor was directly measured for a board_id 0x3a.

Signed-off-by: Petr Cvek <petr.cvek@tul.cz>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>

diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index e6b3eb7..fe65b1e 100644 (file)
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -45,6 +45,8 @@
 #include <linux/platform_data/irda-pxaficp.h>
 #include <linux/platform_data/usb-ohci-pxa27x.h>
 
+#include <linux/regulator/max1586.h>
+
 #include "devices.h"
 #include "generic.h"
 
@@ -697,6 +699,52 @@ static struct platform_device bq24022 = {
 };
 
 /*
+ * Vcore regulator MAX1587A
+ */
+
+static struct regulator_consumer_supply magician_max1587a_consumers[] = {
+       REGULATOR_SUPPLY("vcc_core", NULL),
+};
+
+static struct regulator_init_data magician_max1587a_v3_info = {
+       .constraints = {
+               .name           = "vcc_core range",
+               .min_uV         = 700000,
+               .max_uV         = 1475000,
+               .always_on      = 1,
+               .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
+       },
+       .consumer_supplies      = magician_max1587a_consumers,
+       .num_consumer_supplies  = ARRAY_SIZE(magician_max1587a_consumers),
+};
+
+static struct max1586_subdev_data magician_max1587a_subdevs[] = {
+       {
+               .name           = "vcc_core",
+               .id             = MAX1586_V3,
+               .platform_data  = &magician_max1587a_v3_info,
+       }
+};
+
+static struct max1586_platform_data magician_max1587a_info = {
+       .subdevs     = magician_max1587a_subdevs,
+       .num_subdevs = ARRAY_SIZE(magician_max1587a_subdevs),
+       /*
+        * NOTICE measured directly on the PCB (board_id == 0x3a), but
+        * if R24 is present, it will boost the voltage
+        * (write 1.475V, get 1.645V and smoke)
+        */
+       .v3_gain     = MAX1586_GAIN_NO_R24,
+};
+
+static struct i2c_board_info magician_pwr_i2c_board_info[] __initdata = {
+       {
+               I2C_BOARD_INFO("max1586", 0x14),
+               .platform_data  = &magician_max1587a_info,
+       },
+};
+
+/*
  * MMC/SD
  */
 
@@ -872,6 +920,10 @@ static void __init magician_init(void)
        pxa_set_ficp_info(&magician_ficp_info);
        pxa27x_set_i2c_power_info(&magician_i2c_power_info);
        pxa_set_i2c_info(&i2c_info);
+
+       i2c_register_board_info(1,
+               ARRAY_AND_SIZE(magician_pwr_i2c_board_info));
+
        pxa_set_mci_info(&magician_mci_info);
        pxa_set_ohci_info(&magician_ohci_info);