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Subject[PATCH v3 07/14] mfd: mt6370: Add Mediatek MT6370 support
Date
From: ChiYuan Huang <cy_huang@richtek.com>

Add Mediatek MT6370 MFD support.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---

v3
- Refine Kconfig help text
- Refine error message of unknown vendor ID in
mt6370_check_vendor_info()
- Refine return value handling of mt6370_regmap_read()
- Refine all probe error by using dev_err_probe()
- Refine "bank_idx" and "bank_addr" in mt6370_regmap_read() and
mt6370_regmap_write()
- Add "#define VENID*" and drop the comments in
mt6370_check_vendor_info()
- Drop "MFD" in MODULE_DESCRIPTION()
---
drivers/mfd/Kconfig | 13 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/mt6370.c | 358 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 372 insertions(+)
create mode 100644 drivers/mfd/mt6370.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3b59456..4c900c4 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -937,6 +937,19 @@ config MFD_MT6360
PMIC part includes 2-channel BUCKs and 2-channel LDOs
LDO part includes 4-channel LDOs

+config MFD_MT6370
+ tristate "Mediatek MT6370 SubPMIC"
+ select MFD_CORE
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ depends on I2C
+ help
+ Say Y here to enable MT6370 SubPMIC functional support.
+ It consists of a single cell battery charger with ADC monitoring, RGB
+ LEDs, dual channel flashlight, WLED backlight driver, display bias
+ voltage supply, one general purpose LDO, and the USB Type-C & PD
+ controller complies with the latest USB Type-C and PD standards.
+
config MFD_MT6397
tristate "MediaTek MT6397 PMIC Support"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 858cacf..62b2712 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -242,6 +242,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC_BXTWC) += intel_soc_pmic_bxtwc.o
obj-$(CONFIG_INTEL_SOC_PMIC_CHTWC) += intel_soc_pmic_chtwc.o
obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI) += intel_soc_pmic_chtdc_ti.o
obj-$(CONFIG_MFD_MT6360) += mt6360-core.o
+obj-$(CONFIG_MFD_MT6370) += mt6370.o
mt6397-objs := mt6397-core.o mt6397-irq.o mt6358-irq.o
obj-$(CONFIG_MFD_MT6397) += mt6397.o
obj-$(CONFIG_INTEL_SOC_PMIC_MRFLD) += intel_soc_pmic_mrfld.o
diff --git a/drivers/mfd/mt6370.c b/drivers/mfd/mt6370.c
new file mode 100644
index 0000000..49f02b1
--- /dev/null
+++ b/drivers/mfd/mt6370.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bits.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+enum {
+ MT6370_USBC_I2C = 0,
+ MT6370_PMU_I2C,
+ MT6370_MAX_I2C
+};
+
+#define MT6370_REG_DEV_INFO 0x100
+#define MT6370_REG_CHG_IRQ1 0x1C0
+#define MT6370_REG_CHG_MASK1 0x1E0
+
+#define MT6370_VENID_MASK GENMASK(7, 4)
+
+#define MT6370_NUM_IRQREGS 16
+#define MT6370_USBC_I2CADDR 0x4E
+#define MT6370_REG_ADDRLEN 2
+#define MT6370_REG_MAXADDR 0x1FF
+
+#define MT6370_VENID_RT5081 0x8
+#define MT6370_VENID_RT5081A 0xA
+#define MT6370_VENID_MT6370 0xE
+#define MT6370_VENID_MT6371 0xF
+#define MT6370_VENID_MT6372P 0x9
+#define MT6370_VENID_MT6372CP 0xB
+
+/* IRQ definitions */
+#define MT6370_IRQ_DIRCHGON 0
+#define MT6370_IRQ_CHG_TREG 4
+#define MT6370_IRQ_CHG_AICR 5
+#define MT6370_IRQ_CHG_MIVR 6
+#define MT6370_IRQ_PWR_RDY 7
+#define MT6370_IRQ_FL_CHG_VINOVP 11
+#define MT6370_IRQ_CHG_VSYSUV 12
+#define MT6370_IRQ_CHG_VSYSOV 13
+#define MT6370_IRQ_CHG_VBATOV 14
+#define MT6370_IRQ_CHG_VINOVPCHG 15
+#define MT6370_IRQ_TS_BAT_COLD 20
+#define MT6370_IRQ_TS_BAT_COOL 21
+#define MT6370_IRQ_TS_BAT_WARM 22
+#define MT6370_IRQ_TS_BAT_HOT 23
+#define MT6370_IRQ_TS_STATC 24
+#define MT6370_IRQ_CHG_FAULT 25
+#define MT6370_IRQ_CHG_STATC 26
+#define MT6370_IRQ_CHG_TMR 27
+#define MT6370_IRQ_CHG_BATABS 28
+#define MT6370_IRQ_CHG_ADPBAD 29
+#define MT6370_IRQ_CHG_RVP 30
+#define MT6370_IRQ_TSHUTDOWN 31
+#define MT6370_IRQ_CHG_IINMEAS 32
+#define MT6370_IRQ_CHG_ICCMEAS 33
+#define MT6370_IRQ_CHGDET_DONE 34
+#define MT6370_IRQ_WDTMR 35
+#define MT6370_IRQ_SSFINISH 36
+#define MT6370_IRQ_CHG_RECHG 37
+#define MT6370_IRQ_CHG_TERM 38
+#define MT6370_IRQ_CHG_IEOC 39
+#define MT6370_IRQ_ADC_DONE 40
+#define MT6370_IRQ_PUMPX_DONE 41
+#define MT6370_IRQ_BST_BATUV 45
+#define MT6370_IRQ_BST_MIDOV 46
+#define MT6370_IRQ_BST_OLP 47
+#define MT6370_IRQ_ATTACH 48
+#define MT6370_IRQ_DETACH 49
+#define MT6370_IRQ_HVDCP_STPDONE 51
+#define MT6370_IRQ_HVDCP_VBUSDET_DONE 52
+#define MT6370_IRQ_HVDCP_DET 53
+#define MT6370_IRQ_CHGDET 54
+#define MT6370_IRQ_DCDT 55
+#define MT6370_IRQ_DIRCHG_VGOK 59
+#define MT6370_IRQ_DIRCHG_WDTMR 60
+#define MT6370_IRQ_DIRCHG_UC 61
+#define MT6370_IRQ_DIRCHG_OC 62
+#define MT6370_IRQ_DIRCHG_OV 63
+#define MT6370_IRQ_OVPCTRL_SWON 67
+#define MT6370_IRQ_OVPCTRL_UVP_D 68
+#define MT6370_IRQ_OVPCTRL_UVP 69
+#define MT6370_IRQ_OVPCTRL_OVP_D 70
+#define MT6370_IRQ_OVPCTRL_OVP 71
+#define MT6370_IRQ_FLED_STRBPIN 72
+#define MT6370_IRQ_FLED_TORPIN 73
+#define MT6370_IRQ_FLED_TX 74
+#define MT6370_IRQ_FLED_LVF 75
+#define MT6370_IRQ_FLED2_SHORT 78
+#define MT6370_IRQ_FLED1_SHORT 79
+#define MT6370_IRQ_FLED2_STRB 80
+#define MT6370_IRQ_FLED1_STRB 81
+#define mT6370_IRQ_FLED2_STRB_TO 82
+#define MT6370_IRQ_FLED1_STRB_TO 83
+#define MT6370_IRQ_FLED2_TOR 84
+#define MT6370_IRQ_FLED1_TOR 85
+#define MT6370_IRQ_OTP 93
+#define MT6370_IRQ_VDDA_OVP 94
+#define MT6370_IRQ_VDDA_UV 95
+#define MT6370_IRQ_LDO_OC 103
+#define MT6370_IRQ_BLED_OCP 118
+#define MT6370_IRQ_BLED_OVP 119
+#define MT6370_IRQ_DSV_VNEG_OCP 123
+#define MT6370_IRQ_DSV_VPOS_OCP 124
+#define MT6370_IRQ_DSV_BST_OCP 125
+#define MT6370_IRQ_DSV_VNEG_SCP 126
+#define MT6370_IRQ_DSV_VPOS_SCP 127
+
+struct mt6370_info {
+ struct i2c_client *i2c[MT6370_MAX_I2C];
+ struct device *dev;
+ struct regmap *regmap;
+ struct regmap_irq_chip_data *irq_data;
+};
+
+static const struct regmap_irq mt6370_irqs[] = {
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHGON, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TREG, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_AICR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_MIVR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_PWR_RDY, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FL_CHG_VINOVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSUV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSOV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VBATOV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VINOVPCHG, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COLD, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COOL, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_WARM, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_HOT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_STATC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_FAULT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_STATC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TMR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_BATABS, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ADPBAD, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_TSHUTDOWN, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IINMEAS, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ICCMEAS, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_WDTMR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_SSFINISH, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RECHG, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TERM, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IEOC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_ADC_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_PUMPX_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_BATUV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_MIDOV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_OLP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_ATTACH, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DETACH, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_STPDONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_VBUSDET_DONE, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_DET, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DCDT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_VGOK, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_WDTMR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_UC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_SWON, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP_D, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP_D, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_STRBPIN, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TORPIN, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TX, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_LVF, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_SHORT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_SHORT, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_STRB, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB, 8),
+ REGMAP_IRQ_REG_LINE(mT6370_IRQ_FLED2_STRB_TO, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB_TO, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_TOR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_TOR, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_OTP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_OVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_UV, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_LDO_OC, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OVP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_BST_OCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_SCP, 8),
+ REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_SCP, 8)
+};
+
+static const struct regmap_irq_chip mt6370_irq_chip = {
+ .name = "mt6370-irqs",
+ .status_base = MT6370_REG_CHG_IRQ1,
+ .mask_base = MT6370_REG_CHG_MASK1,
+ .num_regs = MT6370_NUM_IRQREGS,
+ .irqs = mt6370_irqs,
+ .num_irqs = ARRAY_SIZE(mt6370_irqs),
+};
+
+static const struct resource mt6370_regulator_irqs[] = {
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_SCP, "db_vpos_scp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_SCP, "db_vneg_scp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_BST_OCP, "db_vbst_ocp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_OCP, "db_vpos_ocp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_OCP, "db_vneg_ocp"),
+ DEFINE_RES_IRQ_NAMED(MT6370_IRQ_LDO_OC, "ldo_oc")
+};
+
+static const struct mfd_cell mt6370_devices[] = {
+ MFD_CELL_OF("adc", NULL, NULL, 0, 0, "mediatek,mt6370-adc"),
+ MFD_CELL_OF("charger", NULL, NULL, 0, 0, "mediatek,mt6370-charger"),
+ MFD_CELL_OF("backlight", NULL, NULL, 0, 0, "mediatek,mt6370-backlight"),
+ MFD_CELL_OF("flashlight", NULL, NULL, 0, 0, "mediatek,mt6370-flashlight"),
+ MFD_CELL_OF("indicator", NULL, NULL, 0, 0, "mediatek,mt6370-indicator"),
+ MFD_CELL_OF("tcpc", NULL, NULL, 0, 0, "mediatek,mt6370-tcpc"),
+ MFD_CELL_RES("regulator", mt6370_regulator_irqs)
+};
+
+static int mt6370_check_vendor_info(struct mt6370_info *info)
+{
+ unsigned int devinfo;
+ int ret;
+
+ ret = regmap_read(info->regmap, MT6370_REG_DEV_INFO, &devinfo);
+ if (ret)
+ return ret;
+
+ switch (FIELD_GET(MT6370_VENID_MASK, devinfo)) {
+ case MT6370_VENID_RT5081:
+ case MT6370_VENID_RT5081A:
+ case MT6370_VENID_MT6370:
+ case MT6370_VENID_MT6371:
+ case MT6370_VENID_MT6372P:
+ case MT6370_VENID_MT6372CP:
+ break;
+ default:
+ dev_err(info->dev, "Unknown Vendor ID 0x%02x\n", devinfo);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int mt6370_regmap_read(void *context, const void *reg_buf,
+ size_t reg_size, void *val_buf, size_t val_size)
+{
+ struct mt6370_info *info = context;
+ u8 bank_idx, bank_addr;
+ int ret;
+
+ bank_idx = *(u8 *)reg_buf;
+ bank_addr = *(u8 *)(reg_buf + 1);
+
+ ret = i2c_smbus_read_i2c_block_data(info->i2c[bank_idx], bank_addr,
+ val_size, val_buf);
+ if (ret < 0)
+ return ret;
+ else if (ret != val_size)
+ return -EIO;
+
+ return 0;
+}
+
+static int mt6370_regmap_write(void *context, const void *data, size_t count)
+{
+ struct mt6370_info *info = context;
+ u8 bank_idx, bank_addr;
+ int len = count - MT6370_REG_ADDRLEN;
+
+ bank_idx = *(u8 *)data;
+ bank_addr = *(u8 *)(data + 1);
+
+ return i2c_smbus_write_i2c_block_data(info->i2c[bank_idx], bank_addr,
+ len, data + MT6370_REG_ADDRLEN);
+}
+
+static const struct regmap_bus mt6370_regmap_bus = {
+ .read = mt6370_regmap_read,
+ .write = mt6370_regmap_write,
+};
+
+static const struct regmap_config mt6370_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .max_register = MT6370_REG_MAXADDR,
+};
+
+static int mt6370_probe(struct i2c_client *i2c)
+{
+ struct mt6370_info *info;
+ struct i2c_client *usbc_i2c;
+ int ret;
+
+ info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &i2c->dev;
+
+ usbc_i2c = devm_i2c_new_dummy_device(&i2c->dev, i2c->adapter,
+ MT6370_USBC_I2CADDR);
+ if (IS_ERR(usbc_i2c))
+ return dev_err_probe(&i2c->dev, PTR_ERR(usbc_i2c),
+ "Failed to register USBC I2C client\n");
+
+ /* Assign I2C client for PMU and TypeC */
+ info->i2c[MT6370_PMU_I2C] = i2c;
+ info->i2c[MT6370_USBC_I2C] = usbc_i2c;
+
+ info->regmap = devm_regmap_init(&i2c->dev, &mt6370_regmap_bus, info,
+ &mt6370_regmap_config);
+ if (IS_ERR(info->regmap))
+ return dev_err_probe(&i2c->dev, PTR_ERR(info->regmap),
+ "Failed to register regmap\n");
+
+ ret = mt6370_check_vendor_info(info);
+ if (ret)
+ return dev_err_probe(&i2c->dev, ret,
+ "Failed to check vendor info\n");
+
+ ret = devm_regmap_add_irq_chip(&i2c->dev, info->regmap, i2c->irq,
+ IRQF_ONESHOT, -1, &mt6370_irq_chip,
+ &info->irq_data);
+ if (ret)
+ return dev_err_probe(&i2c->dev, ret,
+ "Failed to add irq chip\n");
+
+ return devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
+ mt6370_devices, ARRAY_SIZE(mt6370_devices),
+ NULL, 0,
+ regmap_irq_get_domain(info->irq_data));
+}
+
+static const struct of_device_id mt6370_match_table[] = {
+ { .compatible = "mediatek,mt6370", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6370_match_table);
+
+static struct i2c_driver mt6370_driver = {
+ .driver = {
+ .name = "mt6370",
+ .of_match_table = mt6370_match_table,
+ },
+ .probe_new = mt6370_probe,
+};
+module_i2c_driver(mt6370_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("MT6370 I2C Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
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