regulator: hi6421v530: add driver for hi6421v530 voltage regulator
authorWang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
Wed, 7 Jun 2017 07:06:03 +0000 (15:06 +0800)
committerMark Brown <broonie@kernel.org>
Wed, 7 Jun 2017 19:25:30 +0000 (20:25 +0100)
add the driver for hi6421v530 voltage regulator

Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
drivers/regulator/Kconfig
drivers/regulator/Makefile
drivers/regulator/hi6421v530-regulator.c [new file with mode: 0644]

index 48db87d6dfef4d0bc6f2037feeab7cf88c7949c5..78cd8d84a2cb0337120dabb652b4f9b0043731ac 100644 (file)
@@ -296,6 +296,16 @@ config REGULATOR_HI6421
          21 general purpose LDOs, 3 dedicated LDOs, and 5 BUCKs. All
          of them come with support to either ECO (idle) or sleep mode.
 
+config REGULATOR_HI6421V530
+       tristate "HiSilicon Hi6421v530 PMIC voltage regulator support"
+       depends on MFD_HI6421_PMIC && OF
+       help
+         This driver provides support for the voltage regulators on
+         HiSilicon Hi6421v530 PMU / Codec IC.
+         Hi6421v530 is a multi-function device which, on regulator part,
+         provides 5 general purpose LDOs, and all of them come with support
+         to either ECO (idle) or sleep mode.
+
 config REGULATOR_HI655X
        tristate "Hisilicon HI655X PMIC regulators support"
        depends on ARCH_HISI || COMPILE_TEST
index dc3503fb3e30c0980acc4fe850302d0e91fd20a8..36e2b750b188857166c8e974e7c1b3348d72cab7 100644 (file)
@@ -38,6 +38,7 @@ obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
 obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
 obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
 obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
+obj-$(CONFIG_REGULATOR_HI6421V530) += hi6421v530-regulator.o
 obj-$(CONFIG_REGULATOR_HI655X) += hi655x-regulator.o
 obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
 obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o
diff --git a/drivers/regulator/hi6421v530-regulator.c b/drivers/regulator/hi6421v530-regulator.c
new file mode 100644 (file)
index 0000000..46bbba9
--- /dev/null
@@ -0,0 +1,207 @@
+/*
+ * Device driver for regulators in Hi6421V530 IC
+ *
+ * Copyright (c) <2017> HiSilicon Technologies Co., Ltd.
+ *              http://www.hisilicon.com
+ * Copyright (c) <2017> Linaro Ltd.
+ *              http://www.linaro.org
+ *
+ * Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
+ *         Guodong Xu <guodong.xu@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/mfd/hi6421-pmic.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+
+/*
+ * struct hi6421v530_regulator_info - hi6421v530 regulator information
+ * @desc: regulator description
+ * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep
+ * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only
+ */
+struct hi6421v530_regulator_info {
+       struct regulator_desc rdesc;
+       u8 mode_mask;
+       u32 eco_microamp;
+};
+
+/* HI6421v530 regulators */
+enum hi6421v530_regulator_id {
+       HI6421V530_LDO3,
+       HI6421V530_LDO9,
+       HI6421V530_LDO11,
+       HI6421V530_LDO15,
+       HI6421V530_LDO16,
+};
+
+static const unsigned int ldo_3_voltages[] = {
+       1800000, 1825000, 1850000, 1875000,
+       1900000, 1925000, 1950000, 1975000,
+       2000000, 2025000, 2050000, 2075000,
+       2100000, 2125000, 2150000, 2200000,
+};
+
+static const unsigned int ldo_9_11_voltages[] = {
+       1750000, 1800000, 1825000, 2800000,
+       2850000, 2950000, 3000000, 3300000,
+};
+
+static const unsigned int ldo_15_16_voltages[] = {
+       1750000, 1800000, 2400000, 2600000,
+       2700000, 2850000, 2950000, 3000000,
+};
+
+static const struct regulator_ops hi6421v530_ldo_ops;
+
+#define HI6421V530_LDO_ENABLE_TIME (350)
+
+/*
+ * _id - LDO id name string
+ * v_table - voltage table
+ * vreg - voltage select register
+ * vmask - voltage select mask
+ * ereg - enable register
+ * emask - enable mask
+ * odelay - off/on delay time in uS
+ * ecomask - eco mode mask
+ * ecoamp - eco mode load uppler limit in uA
+ */
+#define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask,         \
+                  odelay, ecomask, ecoamp) {                           \
+       .rdesc = {                                                      \
+               .name            = #_ID,                                \
+               .of_match        = of_match_ptr(#_ID),                  \
+               .regulators_node = of_match_ptr("regulators"),          \
+               .ops             = &hi6421v530_ldo_ops,                 \
+               .type            = REGULATOR_VOLTAGE,                   \
+               .id              = HI6421V530_##_ID,                    \
+               .owner           = THIS_MODULE,                         \
+               .n_voltages      = ARRAY_SIZE(v_table),                 \
+               .volt_table      = v_table,                             \
+               .vsel_reg        = HI6421_REG_TO_BUS_ADDR(vreg),        \
+               .vsel_mask       = vmask,                               \
+               .enable_reg      = HI6421_REG_TO_BUS_ADDR(ereg),        \
+               .enable_mask     = emask,                               \
+               .enable_time     = HI6421V530_LDO_ENABLE_TIME,          \
+               .off_on_delay    = odelay,                              \
+       },                                                              \
+       .mode_mask      = ecomask,                                      \
+       .eco_microamp   = ecoamp,                                       \
+}
+
+/* HI6421V530 regulator information */
+
+static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = {
+       HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2,
+                  20000, 0x6, 8000),
+       HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2,
+                  40000, 0x6, 8000),
+       HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2,
+                  40000, 0x6, 8000),
+       HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2,
+                  40000, 0x6, 8000),
+       HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2,
+                  40000, 0x6, 8000),
+};
+
+static unsigned int hi6421v530_regulator_ldo_get_mode(
+                                       struct regulator_dev *rdev)
+{
+       struct hi6421v530_regulator_info *info;
+       unsigned int reg_val;
+
+       info = rdev_get_drvdata(rdev);
+       regmap_read(rdev->regmap, rdev->desc->enable_reg, &reg_val);
+
+       if (reg_val & (info->mode_mask))
+               return REGULATOR_MODE_IDLE;
+
+       return REGULATOR_MODE_NORMAL;
+}
+
+static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev,
+                                               unsigned int mode)
+{
+       struct hi6421v530_regulator_info *info;
+       unsigned int new_mode;
+
+       info = rdev_get_drvdata(rdev);
+       switch (mode) {
+       case REGULATOR_MODE_NORMAL:
+               new_mode = 0;
+               break;
+       case REGULATOR_MODE_IDLE:
+               new_mode = info->mode_mask;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+                          info->mode_mask, new_mode);
+
+       return 0;
+}
+
+
+static const struct regulator_ops hi6421v530_ldo_ops = {
+       .is_enabled = regulator_is_enabled_regmap,
+       .enable = regulator_enable_regmap,
+       .disable = regulator_disable_regmap,
+       .list_voltage = regulator_list_voltage_table,
+       .map_voltage = regulator_map_voltage_ascend,
+       .get_voltage_sel = regulator_get_voltage_sel_regmap,
+       .set_voltage_sel = regulator_set_voltage_sel_regmap,
+       .get_mode = hi6421v530_regulator_ldo_get_mode,
+       .set_mode = hi6421v530_regulator_ldo_set_mode,
+};
+
+static int hi6421v530_regulator_probe(struct platform_device *pdev)
+{
+       struct hi6421_pmic *pmic;
+       struct regulator_dev *rdev;
+       struct regulator_config config = { };
+       unsigned int i;
+
+       pmic = dev_get_drvdata(pdev->dev.parent);
+       if (!pmic) {
+               dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
+               return -ENODEV;
+       }
+
+       for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) {
+               config.dev = pdev->dev.parent;
+               config.regmap = pmic->regmap;
+               config.driver_data = &hi6421v530_regulator_info[i];
+
+               rdev = devm_regulator_register(&pdev->dev,
+                               &hi6421v530_regulator_info[i].rdesc,
+                               &config);
+               if (IS_ERR(rdev)) {
+                       dev_err(&pdev->dev, "failed to register regulator %s\n",
+                               hi6421v530_regulator_info[i].rdesc.name);
+                       return PTR_ERR(rdev);
+               }
+       }
+       return 0;
+}
+
+static struct platform_driver hi6421v530_regulator_driver = {
+       .driver = {
+               .name   = "hi6421v530-regulator",
+       },
+       .probe  = hi6421v530_regulator_probe,
+};
+module_platform_driver(hi6421v530_regulator_driver);
+
+MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>");
+MODULE_DESCRIPTION("Hi6421v530 regulator driver");
+MODULE_LICENSE("GPL v2");