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linux/drivers/mfd/mt6360-core.c
Krzysztof Kozlowski 4194783812 mfd: mt6360: Use scoped variables with memory allocators to simplify error paths 
Allocate the memory with scoped/cleanup.h to reduce error handling and
make the code a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240707114823.9175-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>
2024-08-30 09:40:13 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2020 MediaTek Inc.
*
* Author: Gene Chen <gene_chen@richtek.com>
*/
#include <linux/cleanup.h>
#include <linux/crc8.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
enum {
MT6360_SLAVE_TCPC = 0,
MT6360_SLAVE_PMIC,
MT6360_SLAVE_LDO,
MT6360_SLAVE_PMU,
MT6360_SLAVE_MAX,
};
struct mt6360_ddata {
struct i2c_client *i2c[MT6360_SLAVE_MAX];
struct device *dev;
struct regmap *regmap;
struct regmap_irq_chip_data *irq_data;
unsigned int chip_rev;
u8 crc8_tbl[CRC8_TABLE_SIZE];
};
#define MT6360_TCPC_SLAVEID 0x4E
#define MT6360_PMIC_SLAVEID 0x1A
#define MT6360_LDO_SLAVEID 0x64
#define MT6360_PMU_SLAVEID 0x34
#define MT6360_REG_TCPCSTART 0x00
#define MT6360_REG_TCPCEND 0xFF
#define MT6360_REG_PMICSTART 0x100
#define MT6360_REG_PMICEND 0x13B
#define MT6360_REG_LDOSTART 0x200
#define MT6360_REG_LDOEND 0x21C
#define MT6360_REG_PMUSTART 0x300
#define MT6360_PMU_DEV_INFO 0x300
#define MT6360_PMU_CHG_IRQ1 0x3D0
#define MT6360_PMU_CHG_MASK1 0x3F0
#define MT6360_REG_PMUEND 0x3FF
#define MT6360_PMU_IRQ_REGNUM 16
#define CHIP_VEN_MASK 0xF0
#define CHIP_VEN_MT6360 0x50
#define CHIP_REV_MASK 0x0F
#define MT6360_ADDRESS_MASK 0x3F
#define MT6360_DATA_SIZE_1_BYTE 0x00
#define MT6360_DATA_SIZE_2_BYTES 0x40
#define MT6360_DATA_SIZE_3_BYTES 0x80
#define MT6360_DATA_SIZE_4_BYTES 0xC0
#define MT6360_CRC8_POLYNOMIAL 0x7
#define MT6360_CRC_I2C_ADDR_SIZE 1
#define MT6360_CRC_REG_ADDR_SIZE 1
/* prealloca read size = i2c device addr + i2c reg addr + val ... + crc8 */
#define MT6360_ALLOC_READ_SIZE(_size) (_size + 3)
/* prealloca write size = i2c device addr + i2c reg addr + val ... + crc8 + dummy byte */
#define MT6360_ALLOC_WRITE_SIZE(_size) (_size + 4)
#define MT6360_CRC_PREDATA_OFFSET (MT6360_CRC_I2C_ADDR_SIZE + MT6360_CRC_REG_ADDR_SIZE)
#define MT6360_CRC_CRC8_SIZE 1
#define MT6360_CRC_DUMMY_BYTE_SIZE 1
#define MT6360_REGMAP_REG_BYTE_SIZE 2
#define I2C_ADDR_XLATE_8BIT(_addr, _rw) (((_addr & 0x7F) << 1) + _rw)
/* reg 0 -> 0 ~ 7 */
#define MT6360_CHG_TREG_EVT 4
#define MT6360_CHG_AICR_EVT 5
#define MT6360_CHG_MIVR_EVT 6
#define MT6360_PWR_RDY_EVT 7
/* REG 1 -> 8 ~ 15 */
#define MT6360_CHG_BATSYSUV_EVT 9
#define MT6360_FLED_CHG_VINOVP_EVT 11
#define MT6360_CHG_VSYSUV_EVT 12
#define MT6360_CHG_VSYSOV_EVT 13
#define MT6360_CHG_VBATOV_EVT 14
#define MT6360_CHG_VBUSOV_EVT 15
/* REG 2 -> 16 ~ 23 */
/* REG 3 -> 24 ~ 31 */
#define MT6360_WD_PMU_DET 25
#define MT6360_WD_PMU_DONE 26
#define MT6360_CHG_TMRI 27
#define MT6360_CHG_ADPBADI 29
#define MT6360_CHG_RVPI 30
#define MT6360_OTPI 31
/* REG 4 -> 32 ~ 39 */
#define MT6360_CHG_AICCMEASL 32
#define MT6360_CHGDET_DONEI 34
#define MT6360_WDTMRI 35
#define MT6360_SSFINISHI 36
#define MT6360_CHG_RECHGI 37
#define MT6360_CHG_TERMI 38
#define MT6360_CHG_IEOCI 39
/* REG 5 -> 40 ~ 47 */
#define MT6360_PUMPX_DONEI 40
#define MT6360_BAT_OVP_ADC_EVT 41
#define MT6360_TYPEC_OTP_EVT 42
#define MT6360_ADC_WAKEUP_EVT 43
#define MT6360_ADC_DONEI 44
#define MT6360_BST_BATUVI 45
#define MT6360_BST_VBUSOVI 46
#define MT6360_BST_OLPI 47
/* REG 6 -> 48 ~ 55 */
#define MT6360_ATTACH_I 48
#define MT6360_DETACH_I 49
#define MT6360_QC30_STPDONE 51
#define MT6360_QC_VBUSDET_DONE 52
#define MT6360_HVDCP_DET 53
#define MT6360_CHGDETI 54
#define MT6360_DCDTI 55
/* REG 7 -> 56 ~ 63 */
#define MT6360_FOD_DONE_EVT 56
#define MT6360_FOD_OV_EVT 57
#define MT6360_CHRDET_UVP_EVT 58
#define MT6360_CHRDET_OVP_EVT 59
#define MT6360_CHRDET_EXT_EVT 60
#define MT6360_FOD_LR_EVT 61
#define MT6360_FOD_HR_EVT 62
#define MT6360_FOD_DISCHG_FAIL_EVT 63
/* REG 8 -> 64 ~ 71 */
#define MT6360_USBID_EVT 64
#define MT6360_APWDTRST_EVT 65
#define MT6360_EN_EVT 66
#define MT6360_QONB_RST_EVT 67
#define MT6360_MRSTB_EVT 68
#define MT6360_OTP_EVT 69
#define MT6360_VDDAOV_EVT 70
#define MT6360_SYSUV_EVT 71
/* REG 9 -> 72 ~ 79 */
#define MT6360_FLED_STRBPIN_EVT 72
#define MT6360_FLED_TORPIN_EVT 73
#define MT6360_FLED_TX_EVT 74
#define MT6360_FLED_LVF_EVT 75
#define MT6360_FLED2_SHORT_EVT 78
#define MT6360_FLED1_SHORT_EVT 79
/* REG 10 -> 80 ~ 87 */
#define MT6360_FLED2_STRB_EVT 80
#define MT6360_FLED1_STRB_EVT 81
#define MT6360_FLED2_STRB_TO_EVT 82
#define MT6360_FLED1_STRB_TO_EVT 83
#define MT6360_FLED2_TOR_EVT 84
#define MT6360_FLED1_TOR_EVT 85
/* REG 11 -> 88 ~ 95 */
/* REG 12 -> 96 ~ 103 */
#define MT6360_BUCK1_PGB_EVT 96
#define MT6360_BUCK1_OC_EVT 100
#define MT6360_BUCK1_OV_EVT 101
#define MT6360_BUCK1_UV_EVT 102
/* REG 13 -> 104 ~ 111 */
#define MT6360_BUCK2_PGB_EVT 104
#define MT6360_BUCK2_OC_EVT 108
#define MT6360_BUCK2_OV_EVT 109
#define MT6360_BUCK2_UV_EVT 110
/* REG 14 -> 112 ~ 119 */
#define MT6360_LDO1_OC_EVT 113
#define MT6360_LDO2_OC_EVT 114
#define MT6360_LDO3_OC_EVT 115
#define MT6360_LDO5_OC_EVT 117
#define MT6360_LDO6_OC_EVT 118
#define MT6360_LDO7_OC_EVT 119
/* REG 15 -> 120 ~ 127 */
#define MT6360_LDO1_PGB_EVT 121
#define MT6360_LDO2_PGB_EVT 122
#define MT6360_LDO3_PGB_EVT 123
#define MT6360_LDO5_PGB_EVT 125
#define MT6360_LDO6_PGB_EVT 126
#define MT6360_LDO7_PGB_EVT 127
static const struct regmap_irq mt6360_irqs[] = {
REGMAP_IRQ_REG_LINE(MT6360_CHG_TREG_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_AICR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_MIVR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_PWR_RDY_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_BATSYSUV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED_CHG_VINOVP_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_VSYSUV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_VSYSOV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_VBATOV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_VBUSOV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_WD_PMU_DET, 8),
REGMAP_IRQ_REG_LINE(MT6360_WD_PMU_DONE, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_TMRI, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_ADPBADI, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_RVPI, 8),
REGMAP_IRQ_REG_LINE(MT6360_OTPI, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_AICCMEASL, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHGDET_DONEI, 8),
REGMAP_IRQ_REG_LINE(MT6360_WDTMRI, 8),
REGMAP_IRQ_REG_LINE(MT6360_SSFINISHI, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_RECHGI, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_TERMI, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_IEOCI, 8),
REGMAP_IRQ_REG_LINE(MT6360_PUMPX_DONEI, 8),
REGMAP_IRQ_REG_LINE(MT6360_BAT_OVP_ADC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_TYPEC_OTP_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_ADC_WAKEUP_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_ADC_DONEI, 8),
REGMAP_IRQ_REG_LINE(MT6360_BST_BATUVI, 8),
REGMAP_IRQ_REG_LINE(MT6360_BST_VBUSOVI, 8),
REGMAP_IRQ_REG_LINE(MT6360_BST_OLPI, 8),
REGMAP_IRQ_REG_LINE(MT6360_ATTACH_I, 8),
REGMAP_IRQ_REG_LINE(MT6360_DETACH_I, 8),
REGMAP_IRQ_REG_LINE(MT6360_QC30_STPDONE, 8),
REGMAP_IRQ_REG_LINE(MT6360_QC_VBUSDET_DONE, 8),
REGMAP_IRQ_REG_LINE(MT6360_HVDCP_DET, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHGDETI, 8),
REGMAP_IRQ_REG_LINE(MT6360_DCDTI, 8),
REGMAP_IRQ_REG_LINE(MT6360_FOD_DONE_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FOD_OV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHRDET_UVP_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHRDET_OVP_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHRDET_EXT_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FOD_LR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FOD_HR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FOD_DISCHG_FAIL_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_USBID_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_APWDTRST_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_EN_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_QONB_RST_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_MRSTB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_OTP_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_VDDAOV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_SYSUV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED_STRBPIN_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED_TORPIN_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED_TX_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED_LVF_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED2_SHORT_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED1_SHORT_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED2_STRB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED1_STRB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED2_STRB_TO_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED1_STRB_TO_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED2_TOR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_FLED1_TOR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK1_PGB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK1_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK1_OV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK1_UV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK2_PGB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK2_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK2_OV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_BUCK2_UV_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO1_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO2_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO3_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO5_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO6_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO7_OC_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO1_PGB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO2_PGB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO3_PGB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO5_PGB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO6_PGB_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO7_PGB_EVT, 8),
};
static const struct regmap_irq_chip mt6360_irq_chip = {
.name = "mt6360_irqs",
.irqs = mt6360_irqs,
.num_irqs = ARRAY_SIZE(mt6360_irqs),
.num_regs = MT6360_PMU_IRQ_REGNUM,
.mask_base = MT6360_PMU_CHG_MASK1,
.status_base = MT6360_PMU_CHG_IRQ1,
.ack_base = MT6360_PMU_CHG_IRQ1,
.init_ack_masked = true,
.use_ack = true,
};
static const struct resource mt6360_adc_resources[] = {
DEFINE_RES_IRQ_NAMED(MT6360_ADC_DONEI, "adc_donei"),
};
static const struct resource mt6360_chg_resources[] = {
DEFINE_RES_IRQ_NAMED(MT6360_CHG_TREG_EVT, "chg_treg_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_PWR_RDY_EVT, "pwr_rdy_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_BATSYSUV_EVT, "chg_batsysuv_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_VSYSUV_EVT, "chg_vsysuv_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_VSYSOV_EVT, "chg_vsysov_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_VBATOV_EVT, "chg_vbatov_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_VBUSOV_EVT, "chg_vbusov_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_AICCMEASL, "chg_aiccmeasl"),
DEFINE_RES_IRQ_NAMED(MT6360_WDTMRI, "wdtmri"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_RECHGI, "chg_rechgi"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_TERMI, "chg_termi"),
DEFINE_RES_IRQ_NAMED(MT6360_CHG_IEOCI, "chg_ieoci"),
DEFINE_RES_IRQ_NAMED(MT6360_PUMPX_DONEI, "pumpx_donei"),
DEFINE_RES_IRQ_NAMED(MT6360_ATTACH_I, "attach_i"),
DEFINE_RES_IRQ_NAMED(MT6360_CHRDET_EXT_EVT, "chrdet_ext_evt"),
};
static const struct resource mt6360_led_resources[] = {
DEFINE_RES_IRQ_NAMED(MT6360_FLED_CHG_VINOVP_EVT, "fled_chg_vinovp_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_FLED_LVF_EVT, "fled_lvf_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_FLED2_SHORT_EVT, "fled2_short_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_FLED1_SHORT_EVT, "fled1_short_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_FLED2_STRB_TO_EVT, "fled2_strb_to_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_FLED1_STRB_TO_EVT, "fled1_strb_to_evt"),
};
static const struct resource mt6360_regulator_resources[] = {
DEFINE_RES_IRQ_NAMED(MT6360_BUCK1_PGB_EVT, "buck1_pgb_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_BUCK1_OC_EVT, "buck1_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_BUCK1_OV_EVT, "buck1_ov_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_BUCK1_UV_EVT, "buck1_uv_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_BUCK2_PGB_EVT, "buck2_pgb_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_BUCK2_OC_EVT, "buck2_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_BUCK2_OV_EVT, "buck2_ov_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_BUCK2_UV_EVT, "buck2_uv_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO1_OC_EVT, "ldo1_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO2_OC_EVT, "ldo2_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO3_OC_EVT, "ldo3_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO5_OC_EVT, "ldo5_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO6_OC_EVT, "ldo6_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO7_OC_EVT, "ldo7_oc_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO1_PGB_EVT, "ldo1_pgb_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO2_PGB_EVT, "ldo2_pgb_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO3_PGB_EVT, "ldo3_pgb_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO5_PGB_EVT, "ldo5_pgb_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO6_PGB_EVT, "ldo6_pgb_evt"),
DEFINE_RES_IRQ_NAMED(MT6360_LDO7_PGB_EVT, "ldo7_pgb_evt"),
};
static const struct mfd_cell mt6360_devs[] = {
MFD_CELL_OF("mt6360-adc", mt6360_adc_resources,
NULL, 0, 0, "mediatek,mt6360-adc"),
MFD_CELL_OF("mt6360-chg", mt6360_chg_resources,
NULL, 0, 0, "mediatek,mt6360-chg"),
MFD_CELL_OF("mt6360-led", mt6360_led_resources,
NULL, 0, 0, "mediatek,mt6360-led"),
MFD_CELL_RES("mt6360-regulator", mt6360_regulator_resources),
MFD_CELL_OF("mt6360-tcpc", NULL,
NULL, 0, 0, "mediatek,mt6360-tcpc"),
};
static int mt6360_check_vendor_info(struct mt6360_ddata *ddata)
{
u32 info;
int ret;
ret = regmap_read(ddata->regmap, MT6360_PMU_DEV_INFO, &info);
if (ret < 0)
return ret;
if ((info & CHIP_VEN_MASK) != CHIP_VEN_MT6360) {
dev_err(ddata->dev, "Device not supported\n");
return -ENODEV;
}
ddata->chip_rev = info & CHIP_REV_MASK;
return 0;
}
static const unsigned short mt6360_slave_addr[MT6360_SLAVE_MAX] = {
MT6360_TCPC_SLAVEID,
MT6360_PMIC_SLAVEID,
MT6360_LDO_SLAVEID,
MT6360_PMU_SLAVEID,
};
static int mt6360_xlate_pmicldo_addr(u8 *addr, int rw_size)
{
/* Address is already in encoded [5:0] */
*addr &= MT6360_ADDRESS_MASK;
switch (rw_size) {
case 1:
*addr |= MT6360_DATA_SIZE_1_BYTE;
break;
case 2:
*addr |= MT6360_DATA_SIZE_2_BYTES;
break;
case 3:
*addr |= MT6360_DATA_SIZE_3_BYTES;
break;
case 4:
*addr |= MT6360_DATA_SIZE_4_BYTES;
break;
default:
return -EINVAL;
}
return 0;
}
static int mt6360_regmap_read(void *context, const void *reg, size_t reg_size,
void *val, size_t val_size)
{
struct mt6360_ddata *ddata = context;
u8 bank = *(u8 *)reg;
u8 reg_addr = *(u8 *)(reg + 1);
struct i2c_client *i2c;
bool crc_needed = false;
int buf_len = MT6360_ALLOC_READ_SIZE(val_size);
int read_size = val_size;
u8 crc;
int ret;
if (bank >= MT6360_SLAVE_MAX)
return -EINVAL;
i2c = ddata->i2c[bank];
if (bank == MT6360_SLAVE_PMIC || bank == MT6360_SLAVE_LDO) {
crc_needed = true;
ret = mt6360_xlate_pmicldo_addr(&reg_addr, val_size);
if (ret < 0)
return ret;
read_size += MT6360_CRC_CRC8_SIZE;
}
u8 *buf __free(kfree) = kzalloc(buf_len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf[0] = I2C_ADDR_XLATE_8BIT(i2c->addr, I2C_SMBUS_READ);
buf[1] = reg_addr;
ret = i2c_smbus_read_i2c_block_data(i2c, reg_addr, read_size,
buf + MT6360_CRC_PREDATA_OFFSET);
if (ret < 0)
return ret;
else if (ret != read_size)
return -EIO;
if (crc_needed) {
crc = crc8(ddata->crc8_tbl, buf, val_size + MT6360_CRC_PREDATA_OFFSET, 0);
if (crc != buf[val_size + MT6360_CRC_PREDATA_OFFSET])
return -EIO;
}
memcpy(val, buf + MT6360_CRC_PREDATA_OFFSET, val_size);
return 0;
}
static int mt6360_regmap_write(void *context, const void *val, size_t val_size)
{
struct mt6360_ddata *ddata = context;
u8 bank = *(u8 *)val;
u8 reg_addr = *(u8 *)(val + 1);
struct i2c_client *i2c;
bool crc_needed = false;
u8 *buf;
int buf_len = MT6360_ALLOC_WRITE_SIZE(val_size);
int write_size = val_size - MT6360_REGMAP_REG_BYTE_SIZE;
int ret;
if (bank >= MT6360_SLAVE_MAX)
return -EINVAL;
i2c = ddata->i2c[bank];
if (bank == MT6360_SLAVE_PMIC || bank == MT6360_SLAVE_LDO) {
crc_needed = true;
ret = mt6360_xlate_pmicldo_addr(&reg_addr, val_size - MT6360_REGMAP_REG_BYTE_SIZE);
if (ret < 0)
return ret;
}
buf = kzalloc(buf_len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf[0] = I2C_ADDR_XLATE_8BIT(i2c->addr, I2C_SMBUS_WRITE);
buf[1] = reg_addr;
memcpy(buf + MT6360_CRC_PREDATA_OFFSET, val + MT6360_REGMAP_REG_BYTE_SIZE, write_size);
if (crc_needed) {
buf[val_size] = crc8(ddata->crc8_tbl, buf, val_size, 0);
write_size += (MT6360_CRC_CRC8_SIZE + MT6360_CRC_DUMMY_BYTE_SIZE);
}
ret = i2c_smbus_write_i2c_block_data(i2c, reg_addr, write_size,
buf + MT6360_CRC_PREDATA_OFFSET);
kfree(buf);
return ret;
}
static const struct regmap_bus mt6360_regmap_bus = {
.read = mt6360_regmap_read,
.write = mt6360_regmap_write,
/* Due to PMIC and LDO CRC access size limit */
.max_raw_read = 4,
.max_raw_write = 4,
};
static bool mt6360_is_readwrite_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case MT6360_REG_TCPCSTART ... MT6360_REG_TCPCEND:
fallthrough;
case MT6360_REG_PMICSTART ... MT6360_REG_PMICEND:
fallthrough;
case MT6360_REG_LDOSTART ... MT6360_REG_LDOEND:
fallthrough;
case MT6360_REG_PMUSTART ... MT6360_REG_PMUEND:
return true;
}
return false;
}
static const struct regmap_config mt6360_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.reg_format_endian = REGMAP_ENDIAN_BIG,
.max_register = MT6360_REG_PMUEND,
.writeable_reg = mt6360_is_readwrite_reg,
.readable_reg = mt6360_is_readwrite_reg,
};
static int mt6360_probe(struct i2c_client *client)
{
struct mt6360_ddata *ddata;
int i, ret;
ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
ddata->dev = &client->dev;
i2c_set_clientdata(client, ddata);
for (i = 0; i < MT6360_SLAVE_MAX - 1; i++) {
ddata->i2c[i] = devm_i2c_new_dummy_device(&client->dev,
client->adapter,
mt6360_slave_addr[i]);
if (IS_ERR(ddata->i2c[i])) {
dev_err(&client->dev,
"Failed to get new dummy I2C device for address 0x%x",
mt6360_slave_addr[i]);
return PTR_ERR(ddata->i2c[i]);
}
}
ddata->i2c[MT6360_SLAVE_MAX - 1] = client;
crc8_populate_msb(ddata->crc8_tbl, MT6360_CRC8_POLYNOMIAL);
ddata->regmap = devm_regmap_init(ddata->dev, &mt6360_regmap_bus, ddata,
&mt6360_regmap_config);
if (IS_ERR(ddata->regmap)) {
dev_err(&client->dev, "Failed to register regmap\n");
return PTR_ERR(ddata->regmap);
}
ret = mt6360_check_vendor_info(ddata);
if (ret)
return ret;
ret = devm_regmap_add_irq_chip(&client->dev, ddata->regmap, client->irq,
0, 0, &mt6360_irq_chip,
&ddata->irq_data);
if (ret) {
dev_err(&client->dev, "Failed to add Regmap IRQ Chip\n");
return ret;
}
ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO,
mt6360_devs, ARRAY_SIZE(mt6360_devs), NULL,
0, regmap_irq_get_domain(ddata->irq_data));
if (ret) {
dev_err(&client->dev,
"Failed to register subordinate devices\n");
return ret;
}
return 0;
}
static int __maybe_unused mt6360_suspend(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
if (device_may_wakeup(dev))
enable_irq_wake(i2c->irq);
return 0;
}
static int __maybe_unused mt6360_resume(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
if (device_may_wakeup(dev))
disable_irq_wake(i2c->irq);
return 0;
}
static SIMPLE_DEV_PM_OPS(mt6360_pm_ops, mt6360_suspend, mt6360_resume);
static const struct of_device_id __maybe_unused mt6360_of_id[] = {
{ .compatible = "mediatek,mt6360", },
{},
};
MODULE_DEVICE_TABLE(of, mt6360_of_id);
static struct i2c_driver mt6360_driver = {
.driver = {
.name = "mt6360",
.pm = &mt6360_pm_ops,
.of_match_table = of_match_ptr(mt6360_of_id),
},
.probe = mt6360_probe,
};
module_i2c_driver(mt6360_driver);
MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
MODULE_DESCRIPTION("MT6360 I2C Driver");
MODULE_LICENSE("GPL v2");
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