davinci: Add I2C0 devices to MityDSP-L138/MityARM-1808 platform

This patch adds the i2c0 bus and attached devices to the MityDSP-L138
and MityARM-1808 davinci SoM.  Included is a TPS65023 voltage regulator
needed for power management and a small 24c02 EPROM that contains
factory configuration data.

Signed-off-by: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 145 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-mityomapl138.c b/arch/arm/mach-davinci/board-mityomapl138.c
index 7146916fa498..84d5aff50de4 100644
--- a/arch/arm/mach-davinci/board-mityomapl138.c
+++ b/arch/arm/mach-davinci/board-mityomapl138.c
@@ -13,6 +13,8 @@
 #include <linux/console.h>
 #include <linux/platform_device.h>
 #include <linux/mtd/partitions.h>
+#include <linux/regulator/machine.h>
+#include <linux/i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -25,6 +27,141 @@
 #define MITYOMAPL138_PHY_MASK           0x08 /* hardcoded for now */
 #define MITYOMAPL138_MDIO_FREQUENCY     (2200000) /* PHY bus frequency */
 
+static struct davinci_i2c_platform_data mityomap_i2c_0_pdata = {
+        .bus_freq       = 100,  /* kHz */
+        .bus_delay      = 0,    /* usec */
+};
+
+/* TPS65023 voltage regulator support */
+/* 1.2V Core */
+struct regulator_consumer_supply tps65023_dcdc1_consumers[] = {
+        {
+                .supply = "cvdd",
+        },
+};
+
+/* 1.8V */
+struct regulator_consumer_supply tps65023_dcdc2_consumers[] = {
+        {
+                .supply = "usb0_vdda18",
+        },
+        {
+                .supply = "usb1_vdda18",
+        },
+        {
+                .supply = "ddr_dvdd18",
+        },
+        {
+                .supply = "sata_vddr",
+        },
+};
+
+/* 1.2V */
+struct regulator_consumer_supply tps65023_dcdc3_consumers[] = {
+        {
+                .supply = "sata_vdd",
+        },
+        {
+                .supply = "usb_cvdd",
+        },
+        {
+                .supply = "pll0_vdda",
+        },
+        {
+                .supply = "pll1_vdda",
+        },
+};
+
+/* 1.8V Aux LDO, not used */
+struct regulator_consumer_supply tps65023_ldo1_consumers[] = {
+        {
+                .supply = "1.8v_aux",
+        },
+};
+
+/* FPGA VCC Aux (2.5 or 3.3) LDO */
+struct regulator_consumer_supply tps65023_ldo2_consumers[] = {
+        {
+                .supply = "vccaux",
+        },
+};
+
+struct regulator_init_data tps65023_regulator_data[] = {
+        /* dcdc1 */
+        {
+                .constraints = {
+                        .min_uV = 1150000,
+                        .max_uV = 1350000,
+                        .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
+                                          REGULATOR_CHANGE_STATUS,
+                        .boot_on = 1,
+                },
+                .num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc1_consumers),
+                .consumer_supplies = tps65023_dcdc1_consumers,
+        },
+        /* dcdc2 */
+        {
+                .constraints = {
+                        .min_uV = 1800000,
+                        .max_uV = 1800000,
+                        .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+                        .boot_on = 1,
+                },
+                .num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc2_consumers),
+                .consumer_supplies = tps65023_dcdc2_consumers,
+        },
+        /* dcdc3 */
+        {
+                .constraints = {
+                        .min_uV = 1200000,
+                        .max_uV = 1200000,
+                        .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+                        .boot_on = 1,
+                },
+                .num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc3_consumers),
+                .consumer_supplies = tps65023_dcdc3_consumers,
+        },
+        /* ldo1 */
+        {
+                .constraints = {
+                        .min_uV = 1800000,
+                        .max_uV = 1800000,
+                        .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+                        .boot_on = 1,
+                },
+                .num_consumer_supplies = ARRAY_SIZE(tps65023_ldo1_consumers),
+                .consumer_supplies = tps65023_ldo1_consumers,
+        },
+        /* ldo2 */
+        {
+                .constraints = {
+                        .min_uV = 2500000,
+                        .max_uV = 3300000,
+                        .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
+                                          REGULATOR_CHANGE_STATUS,
+                        .boot_on = 1,
+                },
+                .num_consumer_supplies = ARRAY_SIZE(tps65023_ldo2_consumers),
+                .consumer_supplies = tps65023_ldo2_consumers,
+        },
+};
+
+static struct i2c_board_info __initdata mityomap_tps65023_info[] = {
+        {
+                I2C_BOARD_INFO("tps65023", 0x48),
+                .platform_data = &tps65023_regulator_data[0],
+        },
+        {
+                I2C_BOARD_INFO("24c02", 0x50),
+        },
+};
+
+static int __init pmic_tps65023_init(void)
+{
+        return i2c_register_board_info(1, mityomap_tps65023_info,
+                                        ARRAY_SIZE(mityomap_tps65023_info));
+}
+
 /*
  * MityDSP-L138 includes a 256 MByte large-page NAND flash
  * (128K blocks).
@@ -172,6 +309,14 @@ static void __init mityomapl138_init(void)
 
         davinci_serial_init(&mityomapl138_uart_config);
 
+        ret = da8xx_register_i2c(0, &mityomap_i2c_0_pdata);
+        if (ret)
+                pr_warning("i2c0 registration failed: %d\n", ret);
+
+        ret = pmic_tps65023_init();
+        if (ret)
+                pr_warning("TPS65023 PMIC init failed: %d\n", ret);
+
         mityomapl138_setup_nand();
 
         mityomapl138_config_emac();