drivers/power/pmic: Add tps65217 driver

Add a driver for the TPS65217 PMIC that is found in the Beaglebone
family of boards.

Signed-off-by: Greg Guyotte <gguyotte@ti.com>
[trini: Split and rework Greg'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 f054470552e52ead7cd607d949b4c703208450ba..ac2b6252e250d5e19d0332d693b26f3716ffd579 100644 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -13,6 +13,7 @@ COBJS-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
 COBJS-$(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  := $(COBJS-y)
 SRCS   := $(COBJS:.o=.c)

diff --git a/drivers/power/pmic/pmic_tps65217.c b/drivers/power/pmic/pmic_tps65217.c
new file mode 100644 (file)
index 0000000..36e9024
--- /dev/null
+++ b/drivers/power/pmic/pmic_tps65217.c
@@ -0,0 +1,109 @@
+/*
+ * (C) Copyright 2011-2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <power/tps65217.h>
+
+/**
+ * tps65217_reg_read() - Generic function that can read a TPS65217 register
+ * @src_reg:            Source register address
+ * @src_val:            Address of destination variable
+ * @return:             0 for success, not 0 on failure.
+ */
+int tps65217_reg_read(uchar src_reg, uchar *src_val)
+{
+       return i2c_read(TPS65217_CHIP_PM, src_reg, 1, src_val, 1);
+}
+
+/**
+ *  tps65217_reg_write() - Generic function that can write a TPS65217 PMIC
+ *                        register or bit field regardless of protection
+ *                        level.
+ *
+ *  @prot_level:          Register password protection.  Use
+ *                        TPS65217_PROT_LEVEL_NONE,
+ *                        TPS65217_PROT_LEVEL_1 or TPS65217_PROT_LEVEL_2
+ *  @dest_reg:            Register address to write.
+ *  @dest_val:            Value to write.
+ *  @mask:                Bit mask (8 bits) to be applied.  Function will only
+ *                        change bits that are set in the bit mask.
+ *
+ *  @return:              0 for success, not 0 on failure, as per the i2c API
+ */
+int tps65217_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
+                      uchar mask)
+{
+       uchar read_val;
+       uchar xor_reg;
+       int ret;
+
+       /*
+        * If we are affecting only a bit field, read dest_reg and apply the
+        * mask
+        */
+       if (mask != TPS65217_MASK_ALL_BITS) {
+               ret = i2c_read(TPS65217_CHIP_PM, dest_reg, 1, &read_val, 1);
+               if (ret)
+                       return ret;
+               read_val &= (~mask);
+               read_val |= (dest_val & mask);
+               dest_val = read_val;
+       }
+
+       if (prot_level > 0) {
+               xor_reg = dest_reg ^ TPS65217_PASSWORD_UNLOCK;
+               ret = i2c_write(TPS65217_CHIP_PM, TPS65217_PASSWORD, 1,
+                               &xor_reg, 1);
+               if (ret)
+                       return ret;
+       }
+
+       ret = i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1);
+       if (ret)
+               return ret;
+
+       if (prot_level == TPS65217_PROT_LEVEL_2) {
+               ret = i2c_write(TPS65217_CHIP_PM, TPS65217_PASSWORD, 1,
+                               &xor_reg, 1);
+               if (ret)
+                       return ret;
+
+               ret = i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1);
+               if (ret)
+                       return ret;
+       }
+
+       return 0;
+}
+
+/**
+ * tps65217_voltage_update() - Function to change a voltage level, as this
+ *                            is a multi-step process.
+ * @dc_cntrl_reg:             DC voltage control register to change.
+ * @volt_sel:                 New value for the voltage register
+ * @return:                   0 for success, not 0 on failure.
+ */
+int tps65217_voltage_update(uchar dc_cntrl_reg, uchar volt_sel)
+{
+       if ((dc_cntrl_reg != TPS65217_DEFDCDC1) &&
+           (dc_cntrl_reg != TPS65217_DEFDCDC2) &&
+           (dc_cntrl_reg != TPS65217_DEFDCDC3))
+               return 1;
+
+       /* set voltage level */
+       if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, dc_cntrl_reg, volt_sel,
+                              TPS65217_MASK_ALL_BITS))
+               return 1;
+
+       /* set GO bit to initiate voltage transition */
+       if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, TPS65217_DEFSLEW,
+                              TPS65217_DCDC_GO, TPS65217_DCDC_GO))
+               return 1;
+
+       return 0;
+}

diff --git a/include/power/tps65217.h b/include/power/tps65217.h
new file mode 100644 (file)
index 0000000..e8c8475
--- /dev/null
+++ b/include/power/tps65217.h
@@ -0,0 +1,82 @@
+/*
+ * (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/tps65217a
+ */
+
+#ifndef __POWER_TPS65217_H__
+#define __POWER_TPS65217_H__
+
+/* I2C chip address */
+#define TPS65217_CHIP_PM                       0x24
+
+/* Registers */
+enum {
+       TPS65217_CHIPID                         = 0x00,
+       TPS65217_POWER_PATH,
+       TPS65217_INTERRUPT,
+       TPS65217_CHGCONFIG0,
+       TPS65217_CHGCONFIG1,
+       TPS65217_CHGCONFIG2,
+       TPS65217_CHGCONFIG3,
+       TPS65217_WLEDCTRL1,
+       TPS65217_WLEDCTRL2,
+       TPS65217_MUXCTRL,
+       TPS65217_STATUS,
+       TPS65217_PASSWORD,
+       TPS65217_PGOOD,
+       TPS65217_DEFPG,
+       TPS65217_DEFDCDC1,
+       TPS65217_DEFDCDC2,
+       TPS65217_DEFDCDC3,
+       TPS65217_DEFSLEW,
+       TPS65217_DEFLDO1,
+       TPS65217_DEFLDO2,
+       TPS65217_DEFLS1,
+       TPS65217_DEFLS2,
+       TPS65217_ENABLE,
+       TPS65217_DEFUVLO,
+       TPS65217_SEQ1,
+       TPS65217_SEQ2,
+       TPS65217_SEQ3,
+       TPS65217_SEQ4,
+       TPS65217_SEQ5,
+       TPS65217_SEQ6,
+       TPS65217_PMIC_NUM_OF_REGS,
+};
+
+#define TPS65217_PROT_LEVEL_NONE               0x00
+#define TPS65217_PROT_LEVEL_1                  0x01
+#define TPS65217_PROT_LEVEL_2                  0x02
+
+#define TPS65217_PASSWORD_LOCK_FOR_WRITE       0x00
+#define TPS65217_PASSWORD_UNLOCK               0x7D
+
+#define TPS65217_DCDC_GO                       0x80
+
+#define TPS65217_MASK_ALL_BITS                 0xFF
+
+#define TPS65217_USB_INPUT_CUR_LIMIT_MASK      0x03
+#define TPS65217_USB_INPUT_CUR_LIMIT_100MA     0x00
+#define TPS65217_USB_INPUT_CUR_LIMIT_500MA     0x01
+#define TPS65217_USB_INPUT_CUR_LIMIT_1300MA    0x02
+#define TPS65217_USB_INPUT_CUR_LIMIT_1800MA    0x03
+
+#define TPS65217_DCDC_VOLT_SEL_1275MV          0x0F
+#define TPS65217_DCDC_VOLT_SEL_1325MV          0x11
+
+#define TPS65217_LDO_MASK                      0x1F
+#define TPS65217_LDO_VOLTAGE_OUT_1_8           0x06
+#define TPS65217_LDO_VOLTAGE_OUT_3_3           0x1F
+
+#define TPS65217_PWR_SRC_USB_BITMASK           0x4
+#define TPS65217_PWR_SRC_AC_BITMASK            0x8
+
+int tps65217_reg_read(uchar src_reg, uchar *src_val);
+int tps65217_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
+                      uchar mask);
+int tps65217_voltage_update(uchar dc_cntrl_reg, uchar volt_sel);
+#endif /* __POWER_TPS65217_H__ */