97eda5dcc2
When STMFX supply is stopped, spurious interrupt can occur. To avoid that,
disable the interrupt in suspend before disabling the regulator and
re-enable it at the end of resume.
Fixes: 06252ade91 ("mfd: Add ST Multi-Function eXpander (STMFX) core driver")
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
125 lines
4 KiB
C
125 lines
4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2019 STMicroelectronics
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* Author(s): Amelie Delaunay <amelie.delaunay@st.com>.
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*/
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#ifndef MFD_STMFX_H
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#define MFD_STMFX_H
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#include <linux/regmap.h>
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/* General */
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#define STMFX_REG_CHIP_ID 0x00 /* R */
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#define STMFX_REG_FW_VERSION_MSB 0x01 /* R */
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#define STMFX_REG_FW_VERSION_LSB 0x02 /* R */
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#define STMFX_REG_SYS_CTRL 0x40 /* RW */
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/* IRQ output management */
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#define STMFX_REG_IRQ_OUT_PIN 0x41 /* RW */
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#define STMFX_REG_IRQ_SRC_EN 0x42 /* RW */
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#define STMFX_REG_IRQ_PENDING 0x08 /* R */
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#define STMFX_REG_IRQ_ACK 0x44 /* RW */
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/* GPIO management */
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#define STMFX_REG_IRQ_GPI_PENDING1 0x0C /* R */
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#define STMFX_REG_IRQ_GPI_PENDING2 0x0D /* R */
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#define STMFX_REG_IRQ_GPI_PENDING3 0x0E /* R */
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#define STMFX_REG_GPIO_STATE1 0x10 /* R */
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#define STMFX_REG_GPIO_STATE2 0x11 /* R */
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#define STMFX_REG_GPIO_STATE3 0x12 /* R */
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#define STMFX_REG_IRQ_GPI_SRC1 0x48 /* RW */
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#define STMFX_REG_IRQ_GPI_SRC2 0x49 /* RW */
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#define STMFX_REG_IRQ_GPI_SRC3 0x4A /* RW */
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#define STMFX_REG_IRQ_GPI_EVT1 0x4C /* RW */
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#define STMFX_REG_IRQ_GPI_EVT2 0x4D /* RW */
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#define STMFX_REG_IRQ_GPI_EVT3 0x4E /* RW */
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#define STMFX_REG_IRQ_GPI_TYPE1 0x50 /* RW */
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#define STMFX_REG_IRQ_GPI_TYPE2 0x51 /* RW */
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#define STMFX_REG_IRQ_GPI_TYPE3 0x52 /* RW */
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#define STMFX_REG_IRQ_GPI_ACK1 0x54 /* RW */
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#define STMFX_REG_IRQ_GPI_ACK2 0x55 /* RW */
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#define STMFX_REG_IRQ_GPI_ACK3 0x56 /* RW */
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#define STMFX_REG_GPIO_DIR1 0x60 /* RW */
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#define STMFX_REG_GPIO_DIR2 0x61 /* RW */
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#define STMFX_REG_GPIO_DIR3 0x62 /* RW */
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#define STMFX_REG_GPIO_TYPE1 0x64 /* RW */
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#define STMFX_REG_GPIO_TYPE2 0x65 /* RW */
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#define STMFX_REG_GPIO_TYPE3 0x66 /* RW */
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#define STMFX_REG_GPIO_PUPD1 0x68 /* RW */
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#define STMFX_REG_GPIO_PUPD2 0x69 /* RW */
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#define STMFX_REG_GPIO_PUPD3 0x6A /* RW */
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#define STMFX_REG_GPO_SET1 0x6C /* RW */
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#define STMFX_REG_GPO_SET2 0x6D /* RW */
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#define STMFX_REG_GPO_SET3 0x6E /* RW */
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#define STMFX_REG_GPO_CLR1 0x70 /* RW */
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#define STMFX_REG_GPO_CLR2 0x71 /* RW */
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#define STMFX_REG_GPO_CLR3 0x72 /* RW */
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#define STMFX_REG_MAX 0xB0
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/* MFX boot time is around 10ms, so after reset, we have to wait this delay */
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#define STMFX_BOOT_TIME_MS 10
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/* STMFX_REG_CHIP_ID bitfields */
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#define STMFX_REG_CHIP_ID_MASK GENMASK(7, 0)
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/* STMFX_REG_SYS_CTRL bitfields */
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#define STMFX_REG_SYS_CTRL_GPIO_EN BIT(0)
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#define STMFX_REG_SYS_CTRL_TS_EN BIT(1)
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#define STMFX_REG_SYS_CTRL_IDD_EN BIT(2)
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#define STMFX_REG_SYS_CTRL_ALTGPIO_EN BIT(3)
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#define STMFX_REG_SYS_CTRL_SWRST BIT(7)
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/* STMFX_REG_IRQ_OUT_PIN bitfields */
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#define STMFX_REG_IRQ_OUT_PIN_TYPE BIT(0) /* 0-OD 1-PP */
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#define STMFX_REG_IRQ_OUT_PIN_POL BIT(1) /* 0-active LOW 1-active HIGH */
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/* STMFX_REG_IRQ_(SRC_EN/PENDING/ACK) bit shift */
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enum stmfx_irqs {
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STMFX_REG_IRQ_SRC_EN_GPIO = 0,
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STMFX_REG_IRQ_SRC_EN_IDD,
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STMFX_REG_IRQ_SRC_EN_ERROR,
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STMFX_REG_IRQ_SRC_EN_TS_DET,
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STMFX_REG_IRQ_SRC_EN_TS_NE,
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STMFX_REG_IRQ_SRC_EN_TS_TH,
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STMFX_REG_IRQ_SRC_EN_TS_FULL,
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STMFX_REG_IRQ_SRC_EN_TS_OVF,
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STMFX_REG_IRQ_SRC_MAX,
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};
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enum stmfx_functions {
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STMFX_FUNC_GPIO = BIT(0), /* GPIO[15:0] */
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STMFX_FUNC_ALTGPIO_LOW = BIT(1), /* aGPIO[3:0] */
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STMFX_FUNC_ALTGPIO_HIGH = BIT(2), /* aGPIO[7:4] */
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STMFX_FUNC_TS = BIT(3),
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STMFX_FUNC_IDD = BIT(4),
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};
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/**
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* struct stmfx_ddata - STMFX MFD structure
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* @device: device reference used for logs
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* @map: register map
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* @vdd: STMFX power supply
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* @irq_domain: IRQ domain
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* @lock: IRQ bus lock
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* @irq_src: cache of IRQ_SRC_EN register for bus_lock
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* @bkp_sysctrl: backup of SYS_CTRL register for suspend/resume
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* @bkp_irqoutpin: backup of IRQ_OUT_PIN register for suspend/resume
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*/
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struct stmfx {
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struct device *dev;
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struct regmap *map;
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struct regulator *vdd;
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int irq;
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struct irq_domain *irq_domain;
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struct mutex lock; /* IRQ bus lock */
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u8 irq_src;
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#ifdef CONFIG_PM
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u8 bkp_sysctrl;
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u8 bkp_irqoutpin;
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#endif
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};
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int stmfx_function_enable(struct stmfx *stmfx, u32 func);
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int stmfx_function_disable(struct stmfx *stmfx, u32 func);
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#endif
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