drivers/power/pmic: Add tps65910 driver

Add a driver for the TPS65910 PMIC that is found in the AM335x GP EVM,
AM335x EVM SK and others.

Signed-off-by: Philip, Avinash <avinashphilip@ti.com>
[trini: Split and rework Avinash's changes into new drivers/power
framework]
Signed-off-by: Tom Rini <trini@ti.com>

diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index ac2b625..11b3d03 100644 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -14,6 +14,7 @@ COBJS-$(CONFIG_POWER_MAX8997) += pmic_max8997.o
 COBJS-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o
 COBJS-$(CONFIG_POWER_MAX77686) += pmic_max77686.o
 COBJS-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o
+COBJS-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
 
 COBJS  := $(COBJS-y)
 SRCS   := $(COBJS:.o=.c)

diff --git a/drivers/power/pmic/pmic_tps65910.c b/drivers/power/pmic/pmic_tps65910.c
new file mode 100644 (file)
index 0000000..7ee1160
--- /dev/null
+++ b/drivers/power/pmic/pmic_tps65910.c
@@ -0,0 +1,83 @@
+/*
+ * (C) Copyright 2011-2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <power/tps65910.h>
+
+/*
+ * tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C
+ *                             interface.
+ * @return:                   0 on success, not 0 on failure
+ */
+int tps65910_set_i2c_control(void)
+{
+       int ret;
+       uchar buf;
+
+       /* VDD1/2 voltage selection register access by control i/f */
+       ret = i2c_read(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
+                      &buf, 1);
+
+       if (ret)
+               return ret;
+
+       buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
+
+       return i2c_write(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
+                        &buf, 1);
+}
+
+/*
+ * tps65910_voltage_update() - Voltage switching for MPU frequency switching.
+ * @module:                   mpu - 0, core - 1
+ * @vddx_op_vol_sel:          vdd voltage to set
+ * @return:                   0 on success, not 0 on failure
+ */
+int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
+{
+       uchar buf;
+       unsigned int reg_offset;
+       int ret;
+
+       if (module == MPU)
+               reg_offset = TPS65910_VDD1_OP_REG;
+       else
+               reg_offset = TPS65910_VDD2_OP_REG;
+
+       /* Select VDDx OP   */
+       ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
+       if (ret)
+               return ret;
+
+       buf &= ~TPS65910_OP_REG_CMD_MASK;
+
+       ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
+       if (ret)
+               return ret;
+
+       /* Configure VDDx OP  Voltage */
+       ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
+       if (ret)
+               return ret;
+
+       buf &= ~TPS65910_OP_REG_SEL_MASK;
+       buf |= vddx_op_vol_sel;
+
+       ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
+       if (ret)
+               return ret;
+
+       ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
+       if (ret)
+               return ret;
+
+       if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
+               return 1;
+
+       return 0;
+}

diff --git a/include/power/tps65910.h b/include/power/tps65910.h
new file mode 100644 (file)
index 0000000..ca84301
--- /dev/null
+++ b/include/power/tps65910.h
@@ -0,0 +1,77 @@
+/*
+ * (C) Copyright 2011-2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ *
+ * For more details, please see the TRM at http://www.ti.com/product/tps65910
+ */
+#ifndef __POWER_TPS65910_H__
+#define __POWER_TPS65910_H__
+
+#define MPU     0
+#define CORE    1
+
+#define TPS65910_SR_I2C_ADDR                           0x12
+#define TPS65910_CTRL_I2C_ADDR                         0x2D
+
+/* PMIC Register offsets */
+enum {
+       TPS65910_VDD1_REG                               = 0x21,
+       TPS65910_VDD1_OP_REG                            = 0x22,
+       TPS65910_VDD2_REG                               = 0x24,
+       TPS65910_VDD2_OP_REG                            = 0x25,
+       TPS65910_DEVCTRL_REG                            = 0x3F,
+};
+
+/* VDD2 & VDD1 control register (VDD2_REG & VDD1_REG) */
+#define TPS65910_VGAIN_SEL_MASK                                (0x3 << 6)
+#define TPS65910_ILMAX_MASK                            (0x1 << 5)
+#define TPS65910_TSTEP_MASK                            (0x7 << 2)
+#define TPS65910_ST_MASK                               (0x3)
+
+#define TPS65910_REG_VGAIN_SEL_X1                      (0x0 << 6)
+#define TPS65910_REG_VGAIN_SEL_X1_0                    (0x1 << 6)
+#define TPS65910_REG_VGAIN_SEL_X3                      (0x2 << 6)
+#define TPS65910_REG_VGAIN_SEL_X4                      (0x3 << 6)
+
+#define TPS65910_REG_ILMAX_1_0_A                       (0x0 << 5)
+#define TPS65910_REG_ILMAX_1_5_A                       (0x1 << 5)
+
+#define TPS65910_REG_TSTEP_                            (0x0 << 2)
+#define TPS65910_REG_TSTEP_12_5                                (0x1 << 2)
+#define TPS65910_REG_TSTEP_9_4                         (0x2 << 2)
+#define TPS65910_REG_TSTEP_7_5                         (0x3 << 2)
+#define TPS65910_REG_TSTEP_6_25                                (0x4 << 2)
+#define TPS65910_REG_TSTEP_4_7                         (0x5 << 2)
+#define TPS65910_REG_TSTEP_3_12                                (0x6 << 2)
+#define TPS65910_REG_TSTEP_2_5                         (0x7 << 2)
+
+#define TPS65910_REG_ST_OFF                            (0x0)
+#define TPS65910_REG_ST_ON_HI_POW                      (0x1)
+#define TPS65910_REG_ST_OFF_1                          (0x2)
+#define TPS65910_REG_ST_ON_LOW_POW                     (0x3)
+
+
+/* VDD2 & VDD1 voltage selection register. (VDD2_OP_REG & VDD1_OP_REG) */
+#define TPS65910_OP_REG_SEL                            (0x7F)
+
+#define TPS65910_OP_REG_CMD_MASK                       (0x1 << 7)
+#define TPS65910_OP_REG_CMD_OP                         (0x0 << 7)
+#define TPS65910_OP_REG_CMD_SR                         (0x1 << 7)
+
+#define TPS65910_OP_REG_SEL_MASK                       (0x7F)
+#define TPS65910_OP_REG_SEL_0_9_5                      (0x1F)  /* 0.9500 V */
+#define TPS65910_OP_REG_SEL_1_1_3                      (0x2E)  /* 1.1375 V */
+#define TPS65910_OP_REG_SEL_1_2_0                      (0x33)  /* 1.2000 V */
+#define TPS65910_OP_REG_SEL_1_2_6                      (0x38)  /* 1.2625 V */
+#define TPS65910_OP_REG_SEL_1_3_2_5                    (0x3D)  /* 1.3250 V */
+
+/* Device control register . (DEVCTRL_REG) */
+#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_MASK           (0x1 << 4)
+#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_SR_I2C     (0x0 << 4)
+#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C    (0x1 << 4)
+
+int tps65910_set_i2c_control(void);
+int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel);
+#endif /* __POWER_TPS65910_H__ */