mfd: RK808: Add new mfd driver for RK808
authorChris Zhong <zyw@rock-chips.com>
Wed, 3 Sep 2014 13:51:44 +0000 (21:51 +0800)
committerLee Jones <lee.jones@linaro.org>
Fri, 26 Sep 2014 07:15:56 +0000 (08:15 +0100)
The RK808 chip is a power management IC for multimedia and handheld
devices. It contains the following components:

- Regulators
- RTC
- Clkout

The RK808 core driver is registered as a platform driver and provides
communication through I2C with the host device for the different
components.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Zhang Qing <zhangqing@rock-chips.com>
Tested-by: Heiko <heiko@sntech.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
drivers/mfd/Kconfig
drivers/mfd/Makefile
drivers/mfd/rk808.c [new file with mode: 0644]
include/linux/mfd/rk808.h [new file with mode: 0644]

index 82f70dcab13672fc606ffe152500a15bbc50a39f..049796a282159b58443a289d56e054da6411bf5e 100644 (file)
@@ -597,6 +597,19 @@ config MFD_RC5T583
          Additional drivers must be enabled in order to use the
          different functionality of the device.
 
+config MFD_RK808
+       tristate "Rockchip RK808 Power Management chip"
+       depends on I2C && OF
+       select MFD_CORE
+       select REGMAP_I2C
+       select REGMAP_IRQ
+       help
+         If you say yes here you get support for the RK808
+         Power Management chips.
+         This driver provides common support for accessing the device
+         through I2C interface. The device supports multiple sub-devices
+         including interrupts, RTC, LDO & DCDC regulators, and onkey.
+
 config MFD_RN5T618
        tristate "Ricoh RN5T5618 PMIC"
        depends on I2C
index aa5a73a5ba475edd01d8b4510432cec510471bdb..bd111213bd58b5a944a993212856f32d06ba6ea3 100644 (file)
@@ -160,6 +160,7 @@ obj-$(CONFIG_MFD_INTEL_MSIC)        += intel_msic.o
 obj-$(CONFIG_MFD_PALMAS)       += palmas.o
 obj-$(CONFIG_MFD_VIPERBOARD)    += viperboard.o
 obj-$(CONFIG_MFD_RC5T583)      += rc5t583.o rc5t583-irq.o
+obj-$(CONFIG_MFD_RK808)                += rk808.o
 obj-$(CONFIG_MFD_RN5T618)      += rn5t618.o
 obj-$(CONFIG_MFD_SEC_CORE)     += sec-core.o sec-irq.o
 obj-$(CONFIG_MFD_SYSCON)       += syscon.o
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
new file mode 100644 (file)
index 0000000..0324422
--- /dev/null
@@ -0,0 +1,245 @@
+/*
+ * MFD core driver for Rockchip RK808
+ *
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * Author: Chris Zhong <zyw@rock-chips.com>
+ * Author: Zhang Qing <zhangqing@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/rk808.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+struct rk808_reg_data {
+       int addr;
+       int mask;
+       int value;
+};
+
+static const struct regmap_config rk808_regmap_config = {
+       .reg_bits = 8,
+       .val_bits = 8,
+       .max_register = RK808_IO_POL_REG,
+};
+
+static struct resource rtc_resources[] = {
+       {
+               .start  = RK808_IRQ_RTC_ALARM,
+               .end    = RK808_IRQ_RTC_ALARM,
+               .flags  = IORESOURCE_IRQ,
+       }
+};
+
+static const struct mfd_cell rk808s[] = {
+       { .name = "rk808-clkout", },
+       { .name = "rk808-regulator", },
+       {
+               .name = "rk808-rtc",
+               .num_resources = ARRAY_SIZE(rtc_resources),
+               .resources = &rtc_resources[0],
+       },
+};
+
+static const struct rk808_reg_data pre_init_reg[] = {
+       { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_150MA },
+       { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_200MA },
+       { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
+       { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK,  BUCK_ILMIN_200MA },
+       { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_200MA },
+       { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
+                                                   VB_LO_SEL_3500MV },
+};
+
+static const struct regmap_irq rk808_irqs[] = {
+       /* INT_STS */
+       [RK808_IRQ_VOUT_LO] = {
+               .mask = RK808_IRQ_VOUT_LO_MSK,
+               .reg_offset = 0,
+       },
+       [RK808_IRQ_VB_LO] = {
+               .mask = RK808_IRQ_VB_LO_MSK,
+               .reg_offset = 0,
+       },
+       [RK808_IRQ_PWRON] = {
+               .mask = RK808_IRQ_PWRON_MSK,
+               .reg_offset = 0,
+       },
+       [RK808_IRQ_PWRON_LP] = {
+               .mask = RK808_IRQ_PWRON_LP_MSK,
+               .reg_offset = 0,
+       },
+       [RK808_IRQ_HOTDIE] = {
+               .mask = RK808_IRQ_HOTDIE_MSK,
+               .reg_offset = 0,
+       },
+       [RK808_IRQ_RTC_ALARM] = {
+               .mask = RK808_IRQ_RTC_ALARM_MSK,
+               .reg_offset = 0,
+       },
+       [RK808_IRQ_RTC_PERIOD] = {
+               .mask = RK808_IRQ_RTC_PERIOD_MSK,
+               .reg_offset = 0,
+       },
+
+       /* INT_STS2 */
+       [RK808_IRQ_PLUG_IN_INT] = {
+               .mask = RK808_IRQ_PLUG_IN_INT_MSK,
+               .reg_offset = 1,
+       },
+       [RK808_IRQ_PLUG_OUT_INT] = {
+               .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
+               .reg_offset = 1,
+       },
+};
+
+static struct regmap_irq_chip rk808_irq_chip = {
+       .name = "rk808",
+       .irqs = rk808_irqs,
+       .num_irqs = ARRAY_SIZE(rk808_irqs),
+       .num_regs = 2,
+       .irq_reg_stride = 2,
+       .status_base = RK808_INT_STS_REG1,
+       .mask_base = RK808_INT_STS_MSK_REG1,
+       .ack_base = RK808_INT_STS_REG1,
+       .init_ack_masked = true,
+};
+
+static struct i2c_client *rk808_i2c_client;
+static void rk808_device_shutdown(void)
+{
+       int ret;
+       struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
+
+       if (!rk808) {
+               dev_warn(&rk808_i2c_client->dev,
+                        "have no rk808, so do nothing here\n");
+               return;
+       }
+
+       ret = regmap_update_bits(rk808->regmap,
+                                RK808_DEVCTRL_REG,
+                                DEV_OFF_RST, DEV_OFF_RST);
+       if (ret)
+               dev_err(&rk808_i2c_client->dev, "power off error!\n");
+}
+
+static int rk808_probe(struct i2c_client *client,
+                      const struct i2c_device_id *id)
+{
+       struct device_node *np = client->dev.of_node;
+       struct rk808 *rk808;
+       int pm_off = 0;
+       int ret;
+       int i;
+
+       if (!client->irq) {
+               dev_err(&client->dev, "No interrupt support, no core IRQ\n");
+               return -EINVAL;
+       }
+
+       rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
+       if (!rk808)
+               return -ENOMEM;
+
+       rk808->regmap = devm_regmap_init_i2c(client, &rk808_regmap_config);
+       if (IS_ERR(rk808->regmap)) {
+               dev_err(&client->dev, "regmap initialization failed\n");
+               return PTR_ERR(rk808->regmap);
+       }
+
+       for (i = 0; i < ARRAY_SIZE(pre_init_reg); i++) {
+               ret = regmap_update_bits(rk808->regmap, pre_init_reg[i].addr,
+                                        pre_init_reg[i].mask,
+                                        pre_init_reg[i].value);
+               if (ret) {
+                       dev_err(&client->dev,
+                               "0x%x write err\n", pre_init_reg[i].addr);
+                       return ret;
+               }
+       }
+
+       ret = regmap_add_irq_chip(rk808->regmap, client->irq,
+                                 IRQF_ONESHOT, -1,
+                                 &rk808_irq_chip, &rk808->irq_data);
+       if (ret) {
+               dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
+               return ret;
+       }
+
+       rk808->i2c = client;
+       i2c_set_clientdata(client, rk808);
+
+       ret = mfd_add_devices(&client->dev, -1,
+                             rk808s, ARRAY_SIZE(rk808s),
+                             NULL, 0, regmap_irq_get_domain(rk808->irq_data));
+       if (ret) {
+               dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
+               goto err_irq;
+       }
+
+       pm_off = of_property_read_bool(np,
+                               "rockchip,system-power-controller");
+       if (pm_off && !pm_power_off) {
+               rk808_i2c_client = client;
+               pm_power_off = rk808_device_shutdown;
+       }
+
+       return 0;
+
+err_irq:
+       regmap_del_irq_chip(client->irq, rk808->irq_data);
+       return ret;
+}
+
+static int rk808_remove(struct i2c_client *client)
+{
+       struct rk808 *rk808 = i2c_get_clientdata(client);
+
+       regmap_del_irq_chip(client->irq, rk808->irq_data);
+       mfd_remove_devices(&client->dev);
+       pm_power_off = NULL;
+
+       return 0;
+}
+
+static struct of_device_id rk808_of_match[] = {
+       { .compatible = "rockchip,rk808" },
+       { },
+};
+MODULE_DEVICE_TABLE(of, rk808_of_match);
+
+static const struct i2c_device_id rk808_ids[] = {
+       { "rk808" },
+       { },
+};
+MODULE_DEVICE_TABLE(i2c, rk808_ids);
+
+static struct i2c_driver rk808_i2c_driver = {
+       .driver = {
+               .name = "rk808",
+               .of_match_table = rk808_of_match,
+       },
+       .probe    = rk808_probe,
+       .remove   = rk808_remove,
+       .id_table = rk808_ids,
+};
+
+module_i2c_driver(rk808_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
+MODULE_DESCRIPTION("RK808 PMIC driver");
diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h
new file mode 100644 (file)
index 0000000..fb09312
--- /dev/null
@@ -0,0 +1,196 @@
+/*
+ * rk808.h for Rockchip RK808
+ *
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * Author: Chris Zhong <zyw@rock-chips.com>
+ * Author: Zhang Qing <zhangqing@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __LINUX_REGULATOR_rk808_H
+#define __LINUX_REGULATOR_rk808_H
+
+#include <linux/regulator/machine.h>
+#include <linux/regmap.h>
+
+/*
+ * rk808 Global Register Map.
+ */
+
+#define RK808_DCDC1    0 /* (0+RK808_START) */
+#define RK808_LDO1     4 /* (4+RK808_START) */
+#define RK808_NUM_REGULATORS   14
+
+enum rk808_reg {
+       RK808_ID_DCDC1,
+       RK808_ID_DCDC2,
+       RK808_ID_DCDC3,
+       RK808_ID_DCDC4,
+       RK808_ID_LDO1,
+       RK808_ID_LDO2,
+       RK808_ID_LDO3,
+       RK808_ID_LDO4,
+       RK808_ID_LDO5,
+       RK808_ID_LDO6,
+       RK808_ID_LDO7,
+       RK808_ID_LDO8,
+       RK808_ID_SWITCH1,
+       RK808_ID_SWITCH2,
+};
+
+#define RK808_SECONDS_REG      0x00
+#define RK808_MINUTES_REG      0x01
+#define RK808_HOURS_REG                0x02
+#define RK808_DAYS_REG         0x03
+#define RK808_MONTHS_REG       0x04
+#define RK808_YEARS_REG                0x05
+#define RK808_WEEKS_REG                0x06
+#define RK808_ALARM_SECONDS_REG        0x08
+#define RK808_ALARM_MINUTES_REG        0x09
+#define RK808_ALARM_HOURS_REG  0x0a
+#define RK808_ALARM_DAYS_REG   0x0b
+#define RK808_ALARM_MONTHS_REG 0x0c
+#define RK808_ALARM_YEARS_REG  0x0d
+#define RK808_RTC_CTRL_REG     0x10
+#define RK808_RTC_STATUS_REG   0x11
+#define RK808_RTC_INT_REG      0x12
+#define RK808_RTC_COMP_LSB_REG 0x13
+#define RK808_RTC_COMP_MSB_REG 0x14
+#define RK808_CLK32OUT_REG     0x20
+#define RK808_VB_MON_REG       0x21
+#define RK808_THERMAL_REG      0x22
+#define RK808_DCDC_EN_REG      0x23
+#define RK808_LDO_EN_REG       0x24
+#define RK808_SLEEP_SET_OFF_REG1       0x25
+#define RK808_SLEEP_SET_OFF_REG2       0x26
+#define RK808_DCDC_UV_STS_REG  0x27
+#define RK808_DCDC_UV_ACT_REG  0x28
+#define RK808_LDO_UV_STS_REG   0x29
+#define RK808_LDO_UV_ACT_REG   0x2a
+#define RK808_DCDC_PG_REG      0x2b
+#define RK808_LDO_PG_REG       0x2c
+#define RK808_VOUT_MON_TDB_REG 0x2d
+#define RK808_BUCK1_CONFIG_REG         0x2e
+#define RK808_BUCK1_ON_VSEL_REG                0x2f
+#define RK808_BUCK1_SLP_VSEL_REG       0x30
+#define RK808_BUCK1_DVS_VSEL_REG       0x31
+#define RK808_BUCK2_CONFIG_REG         0x32
+#define RK808_BUCK2_ON_VSEL_REG                0x33
+#define RK808_BUCK2_SLP_VSEL_REG       0x34
+#define RK808_BUCK2_DVS_VSEL_REG       0x35
+#define RK808_BUCK3_CONFIG_REG         0x36
+#define RK808_BUCK4_CONFIG_REG         0x37
+#define RK808_BUCK4_ON_VSEL_REG                0x38
+#define RK808_BUCK4_SLP_VSEL_REG       0x39
+#define RK808_BOOST_CONFIG_REG         0x3a
+#define RK808_LDO1_ON_VSEL_REG         0x3b
+#define RK808_LDO1_SLP_VSEL_REG                0x3c
+#define RK808_LDO2_ON_VSEL_REG         0x3d
+#define RK808_LDO2_SLP_VSEL_REG                0x3e
+#define RK808_LDO3_ON_VSEL_REG         0x3f
+#define RK808_LDO3_SLP_VSEL_REG                0x40
+#define RK808_LDO4_ON_VSEL_REG         0x41
+#define RK808_LDO4_SLP_VSEL_REG                0x42
+#define RK808_LDO5_ON_VSEL_REG         0x43
+#define RK808_LDO5_SLP_VSEL_REG                0x44
+#define RK808_LDO6_ON_VSEL_REG         0x45
+#define RK808_LDO6_SLP_VSEL_REG                0x46
+#define RK808_LDO7_ON_VSEL_REG         0x47
+#define RK808_LDO7_SLP_VSEL_REG                0x48
+#define RK808_LDO8_ON_VSEL_REG         0x49
+#define RK808_LDO8_SLP_VSEL_REG                0x4a
+#define RK808_DEVCTRL_REG      0x4b
+#define RK808_INT_STS_REG1     0x4c
+#define RK808_INT_STS_MSK_REG1 0x4d
+#define RK808_INT_STS_REG2     0x4e
+#define RK808_INT_STS_MSK_REG2 0x4f
+#define RK808_IO_POL_REG       0x50
+
+/* IRQ Definitions */
+#define RK808_IRQ_VOUT_LO      0
+#define RK808_IRQ_VB_LO                1
+#define RK808_IRQ_PWRON                2
+#define RK808_IRQ_PWRON_LP     3
+#define RK808_IRQ_HOTDIE       4
+#define RK808_IRQ_RTC_ALARM    5
+#define RK808_IRQ_RTC_PERIOD   6
+#define RK808_IRQ_PLUG_IN_INT  7
+#define RK808_IRQ_PLUG_OUT_INT 8
+#define RK808_NUM_IRQ          9
+
+#define RK808_IRQ_VOUT_LO_MSK          BIT(0)
+#define RK808_IRQ_VB_LO_MSK            BIT(1)
+#define RK808_IRQ_PWRON_MSK            BIT(2)
+#define RK808_IRQ_PWRON_LP_MSK         BIT(3)
+#define RK808_IRQ_HOTDIE_MSK           BIT(4)
+#define RK808_IRQ_RTC_ALARM_MSK                BIT(5)
+#define RK808_IRQ_RTC_PERIOD_MSK       BIT(6)
+#define RK808_IRQ_PLUG_IN_INT_MSK      BIT(0)
+#define RK808_IRQ_PLUG_OUT_INT_MSK     BIT(1)
+
+#define RK808_VBAT_LOW_2V8     0x00
+#define RK808_VBAT_LOW_2V9     0x01
+#define RK808_VBAT_LOW_3V0     0x02
+#define RK808_VBAT_LOW_3V1     0x03
+#define RK808_VBAT_LOW_3V2     0x04
+#define RK808_VBAT_LOW_3V3     0x05
+#define RK808_VBAT_LOW_3V4     0x06
+#define RK808_VBAT_LOW_3V5     0x07
+#define VBAT_LOW_VOL_MASK      (0x07 << 0)
+#define EN_VABT_LOW_SHUT_DOWN  (0x00 << 4)
+#define EN_VBAT_LOW_IRQ                (0x1 << 4)
+#define VBAT_LOW_ACT_MASK      (0x1 << 4)
+
+#define BUCK_ILMIN_MASK                (7 << 0)
+#define BOOST_ILMIN_MASK       (7 << 0)
+#define BUCK1_RATE_MASK                (3 << 3)
+#define BUCK2_RATE_MASK                (3 << 3)
+#define MASK_ALL       0xff
+
+#define SWITCH2_EN     BIT(6)
+#define SWITCH1_EN     BIT(5)
+#define DEV_OFF_RST    BIT(3)
+
+#define VB_LO_ACT              BIT(4)
+#define VB_LO_SEL_3500MV       (7 << 0)
+
+#define VOUT_LO_INT    BIT(0)
+#define CLK32KOUT2_EN  BIT(0)
+
+enum {
+       BUCK_ILMIN_50MA,
+       BUCK_ILMIN_100MA,
+       BUCK_ILMIN_150MA,
+       BUCK_ILMIN_200MA,
+       BUCK_ILMIN_250MA,
+       BUCK_ILMIN_300MA,
+       BUCK_ILMIN_350MA,
+       BUCK_ILMIN_400MA,
+};
+
+enum {
+       BOOST_ILMIN_75MA,
+       BOOST_ILMIN_100MA,
+       BOOST_ILMIN_125MA,
+       BOOST_ILMIN_150MA,
+       BOOST_ILMIN_175MA,
+       BOOST_ILMIN_200MA,
+       BOOST_ILMIN_225MA,
+       BOOST_ILMIN_250MA,
+};
+
+struct rk808 {
+       struct i2c_client *i2c;
+       struct regmap_irq_chip_data *irq_data;
+       struct regmap *regmap;
+};
+#endif /* __LINUX_REGULATOR_rk808_H */