TPS6235x chip based PR785 power modules are from Texas Instruments
for OMAP3 EVM boards. This patch supports the PR785 card
and provides the driver support for the TPS devices.
For compilation, the LCD and MMC drivers are modified and will not
work. Further patches will be provided for support of LCD and MMC
with PR785 boards.
Signed-off-by: Manikandan Pillai <mani.pillai@xxxxxx>
---
arch/arm/mach-omap2/Kconfig | 11 +++
arch/arm/mach-omap2/board-omap3evm.c | 137 ++++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/mmc-twl4030.c | 4 +-
arch/arm/plat-omap/i2c.c | 63 +++++++++++++++-
drivers/video/omap/lcd_omap3evm.c | 6 ++
5 files changed, 219 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 0a86a88..b0b9bcc 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -121,6 +121,17 @@ config MACH_OMAP3EVM
bool "OMAP 3530 EVM board"
depends on ARCH_OMAP3 && ARCH_OMAP34XX
+menu "Power board selection for OMAP3 EVM"
+config OMAP3EVM_PR785
+ bool "Power board for OMAP3 EVM"
+ depends on I2C=y && ARCH_OMAP34XX
+ help
+ Say yes here if you are using the TPS6235x based PR785 Power Module
+ for the EVM boards. This core driver provides register access and IRQ
+ handling facilities, and registers devices for the various functions
+ so that function-specific drivers can bind to them.
+endmenu
+
config MACH_OMAP3_BEAGLE
bool "OMAP3 BEAGLE board"
depends on ARCH_OMAP3 && ARCH_OMAP34XX
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index e4e60e2..60d2d22 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -36,12 +36,19 @@
#include <mach/usb-ehci.h>
#include <mach/common.h>
#include <mach/mcspi.h>
+#include <mach/mux.h>
#include "sdram-micron-mt46h32m32lf-6.h"
#include "twl4030-generic-scripts.h"
#include "mmc-twl4030.h"
+#include <linux/regulator/machine.h>
+#include <linux/regulator/driver.h>
+#define TPS6235X_REG_MAX 3
+#if defined(CONFIG_OMAP3EVM_PR785) && defined(CONFIG_TWL4030_CORE)
+#error config err : only one of OMAP3EVM_PR785 or TWL4030_CORE can be defined
+#endif
static struct resource omap3evm_smc911x_resources[] = {
[0] = {
.start = OMAP3EVM_ETHR_START,
@@ -89,6 +96,7 @@ static struct omap_uart_config omap3_evm_uart_config __initdata = {
.enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
};
+#if defined(CONFIG_TWL4030_CORE)
static struct twl4030_gpio_platform_data omap3evm_gpio_data = {
.gpio_base = OMAP_MAX_GPIO_LINES,
.irq_base = TWL4030_GPIO_IRQ_BASE,
@@ -150,16 +158,125 @@ static struct i2c_board_info __initdata omap3evm_i2c_boardinfo[] = {
.platform_data = &omap3evm_twldata,
},
};
+#endif
+
+#if defined(CONFIG_OMAP3EVM_PR785)
+/* CORE voltage regulator */
+struct regulator_consumer_supply tps62352_core_consumers = {
+ .supply = "vdd2",
+};
+
+/* MPU voltage regulator */
+struct regulator_consumer_supply tps62352_mpu_consumers = {
+ .supply = "vdd1",
+};
+
+struct regulator_init_data vdd2_tps_regulator_data = {
+ .constraints = {
+ .min_uV = 750000,
+ .max_uV = 1537000,
+ .valid_ops_mask = (REGULATOR_CHANGE_VOLTAGE |
+ REGULATOR_CHANGE_STATUS),
+ },
+ .num_consumer_supplies = 1,
+ .consumer_supplies = &tps62352_core_consumers,
+};
+
+struct regulator_init_data vdd1_tps_regulator_data = {
+ .constraints = {
+ .min_uV = 750000,
+ .max_uV = 1537000,
+ .valid_ops_mask = (REGULATOR_CHANGE_VOLTAGE |
+ REGULATOR_CHANGE_STATUS),
+ },
+ .num_consumer_supplies = 1,
+ .consumer_supplies = &tps62352_mpu_consumers,
+};
+
+static struct i2c_board_info __initdata tps_6235x_i2c_board_info[] = {
+ {
+ I2C_BOARD_INFO("tps62352", 0x4A),
+ .flags = I2C_CLIENT_WAKE,
+ .platform_data = &vdd2_tps_regulator_data,
+ },
+ {
+ I2C_BOARD_INFO("tps62353", 0x48),
+ .flags = I2C_CLIENT_WAKE,
+ .platform_data = &vdd1_tps_regulator_data,
+ },
+};
+#endif
static int __init omap3_evm_i2c_init(void)
{
+#if defined(CONFIG_OMAP3EVM_PR785)
+ omap_register_i2c_bus(1, 2600, tps_6235x_i2c_board_info,
+ ARRAY_SIZE(tps_6235x_i2c_board_info));
+#endif
+#if defined(CONFIG_TWL4030_CORE)
omap_register_i2c_bus(1, 2600, omap3evm_i2c_boardinfo,
ARRAY_SIZE(omap3evm_i2c_boardinfo));
+#endif
omap_register_i2c_bus(2, 400, NULL, 0);
omap_register_i2c_bus(3, 400, NULL, 0);
return 0;
}
+/*
+ * Read a value from a register in an tps_6235x device.
+ * The value is returned in 'val'.
+ * Returns zero if successful, or non-zero otherwise.
+ */
+int tps_6235x_read_reg(struct i2c_client *client, u8 reg, u8 *val)
+{
+ u8 data;
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ if (reg > TPS6235X_REG_MAX)
+ return -1;
+
+ data = i2c_smbus_read_byte_data(client, reg);
+ *val = data;
+ return 0;
+}
+
+/*
+ * Write a value to a register in an tps_6235x device.
+ * Returns zero if successful, or non-zero otherwise.
+ */
+int tps_6235x_write_reg(struct i2c_client *client, u8 reg, u8 val)
+{
+ int err;
+ int retry = 0;
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ if (reg > TPS6235X_REG_MAX)
+ return -1;
+
+again:
+ err = i2c_smbus_write_byte_data(client, reg, val);
+ if (err >= 0)
+ return 0;
+
+ dev_err(&client->dev,
+ "wrote 0x%.2x to offset 0x%.2x error %d\n", val, reg, err);
+
+ /* Try 3 times */
+ if (retry <= 3) {
+ dev_info(&client->dev, "retry ... %d\n", retry);
+ retry++;
+ schedule_timeout(msecs_to_jiffies(20));
+ goto again;
+ }
+ return err;
+}
+
+/*-------------------------------------------------------------------*/
+
static struct platform_device omap3_evm_lcd_device = {
.name = "omap3evm_lcd",
.id = -1,
@@ -233,6 +350,7 @@ static struct platform_device *omap3_evm_devices[] __initdata = {
&omap3evm_smc911x_device,
};
+#if defined(CONFIG_TWL4030_CORE)
static struct twl4030_hsmmc_info mmc[] __initdata = {
{
.mmc = 1,
@@ -242,6 +360,20 @@ static struct twl4030_hsmmc_info mmc[] __initdata = {
},
{} /* Terminator */
};
+#endif
+
+static void omap_init_pr785(void)
+{
+ /* Initialize the mux settings for PR785 power module board */
+ if (cpu_is_omap343x()) {
+ omap_cfg_reg(AF26_34XX_GPIO0);
+ omap_cfg_reg(AF22_34XX_GPIO9);
+ omap_cfg_reg(AF6_34XX_GPIO140_UP);
+ omap_cfg_reg(AE6_34XX_GPIO141);
+ omap_cfg_reg(AF5_34XX_GPIO142);
+ omap_cfg_reg(AE5_34XX_GPIO143);
+ }
+}
static void __init omap3_evm_init(void)
{
@@ -255,7 +387,12 @@ static void __init omap3_evm_init(void)
ARRAY_SIZE(omap3evm_spi_board_info));
omap_serial_init();
+#if defined(CONFIG_TWL4030_CORE)
twl4030_mmc_init(mmc);
+#endif
+#if defined(CONFIG_OMAP3EVM_PR785)
+ omap_init_pr785();
+#endif
usb_musb_init();
usb_ehci_init();
omap3evm_flash_init();
diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c
index 437f520..d907889 100644
--- a/arch/arm/mach-omap2/mmc-twl4030.c
+++ b/arch/arm/mach-omap2/mmc-twl4030.c
@@ -168,7 +168,7 @@ static int twl_mmc_resume(struct device *dev, int slot)
*/
static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd)
{
- int ret;
+ int ret = 0;
u8 vmmc, dev_grp_val;
switch (1 << vdd) {
@@ -223,6 +223,7 @@ static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd)
else
dev_grp_val = LDO_CLR; /* Power down */
+#if defined(CONFIG_TWL4030_CORE)
ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
dev_grp_val, c->twl_vmmc_dev_grp);
if (ret)
@@ -231,6 +232,7 @@ static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd)
ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
vmmc, c->twl_mmc_dedicated);
+#endif
return ret;
}
diff --git a/arch/arm/plat-omap/i2c.c b/arch/arm/plat-omap/i2c.c
index 89a6ab0..bc6b2cc 100644
--- a/arch/arm/plat-omap/i2c.c
+++ b/arch/arm/plat-omap/i2c.c
@@ -27,6 +27,8 @@
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <mach/mux.h>
+#include <linux/string.h>
+#include <linux/regulator/machine.h>
#define OMAP_I2C_SIZE 0x3f
#define OMAP1_I2C_BASE 0xfffb3800
@@ -97,6 +99,13 @@ static const int omap34xx_pins[][2] = {
static const int omap34xx_pins[][2] = {};
#endif
+struct platform_device *vdd2_platform_device;
+struct platform_device *vdd1_platform_device;
+extern struct regulator_init_data vdd2_tps_regulator_data;
+extern struct regulator_init_data vdd1_tps_regulator_data;
+extern struct regulator_consumer_supply tps62352_core_consumers;
+extern struct regulator_consumer_supply tps62352_mpu_consumers;
+
static void __init omap_i2c_mux_pins(int bus)
{
int scl, sda;
@@ -118,6 +127,51 @@ static void __init omap_i2c_mux_pins(int bus)
omap_cfg_reg(scl);
}
+/* This is the callback function used to find the correct
+ * i2c platform child for the regulator consumer
+*/
+int omap_i2c_match_child(struct device *dev, void *data)
+{
+ struct regulator_init_data *reg_init_data = dev->platform_data;
+ char *name = data;
+
+ /* Child does not match */
+ if (strcmp(name, reg_init_data->consumer_supplies->supply))
+ return 0;
+ else
+ return 1;
+}
+
+int omap_i2c_register_child(struct platform_device *pdev_parent,
+ const char *name, struct platform_device **pdev)
+{
+ int ret = 0;
+
+ *pdev = platform_device_alloc(name, -1);
+ if (pdev == NULL) {
+ dev_err(&(*pdev)->dev, "Failed to alloc i2c-child %s\n", name);
+ return -1;
+ }
+
+ (*pdev)->dev.parent = &pdev_parent->dev;
+ if (strcmp(name, "vdd2_consumer") == 0) {
+ tps62352_core_consumers.dev = &(*pdev)->dev;
+ (*pdev)->dev.platform_data = &vdd2_tps_regulator_data;
+ } else if (strcmp(name, "vdd1_consumer") == 0) {
+ tps62352_mpu_consumers.dev = &(*pdev)->dev;
+ (*pdev)->dev.platform_data = &vdd1_tps_regulator_data;
+ }
+
+ ret = platform_device_add(*pdev);
+ if (ret != 0) {
+ dev_err(&(*pdev)->dev, "Failed to register %s: %d\n",
+ name, ret);
+ platform_device_put(*pdev);
+ *pdev = NULL;
+ }
+ return ret;
+}
+
int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len)
@@ -160,5 +214,12 @@ int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
}
omap_i2c_mux_pins(bus_id - 1);
- return platform_device_register(pdev);
+ platform_device_register(pdev);
+ if (bus_id == 1) {
+ omap_i2c_register_child(pdev, "vdd2_consumer", \
+ &vdd2_platform_device);
+ omap_i2c_register_child(pdev, "vdd1_consumer", \
+ &vdd1_platform_device);
+ }
+ return 0;
}
diff --git a/drivers/video/omap/lcd_omap3evm.c b/drivers/video/omap/lcd_omap3evm.c
index 1c3d814..4f373b2 100644
--- a/drivers/video/omap/lcd_omap3evm.c
+++ b/drivers/video/omap/lcd_omap3evm.c
@@ -66,9 +66,11 @@ static int omap3evm_panel_init(struct lcd_panel *panel,
gpio_direction_output(LCD_PANEL_LR, 1);
gpio_direction_output(LCD_PANEL_UD, 1);
+#if defined(CONFIG_TWL4030_CORE)
twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
+#endif
bklight_level = 100;
return 0;
@@ -97,6 +99,7 @@ static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
unsigned int level)
{
+#if defined(CONFIG_TWL4030_CORE)
u8 c;
if ((level >= 0) && (level <= 100)) {
c = (125 * (100 - level)) / 100 + 2;
@@ -104,6 +107,9 @@ static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
bklight_level = level;
}
return 0;
+#endif
+ /* Fix this once patch fix is sent out for TPS-boards */
+ return -1;
}
static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel)
--
1.5.6
--
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