xref: /openbmc/linux/include/linux/mfd/stmfx.h (revision 4d8a6ae2)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2019 STMicroelectronics
4  * Author(s): Amelie Delaunay <amelie.delaunay@st.com>.
5  */
6 
7 #ifndef MFD_STMFX_H
8 #define MFD_STMFX_H
9 
10 #include <linux/regmap.h>
11 
12 /* General */
13 #define STMFX_REG_CHIP_ID		0x00 /* R */
14 #define STMFX_REG_FW_VERSION_MSB	0x01 /* R */
15 #define STMFX_REG_FW_VERSION_LSB	0x02 /* R */
16 #define STMFX_REG_SYS_CTRL		0x40 /* RW */
17 /* IRQ output management */
18 #define STMFX_REG_IRQ_OUT_PIN		0x41 /* RW */
19 #define STMFX_REG_IRQ_SRC_EN		0x42 /* RW */
20 #define STMFX_REG_IRQ_PENDING		0x08 /* R */
21 #define STMFX_REG_IRQ_ACK		0x44 /* RW */
22 /* GPIO management */
23 #define STMFX_REG_IRQ_GPI_PENDING1	0x0C /* R */
24 #define STMFX_REG_IRQ_GPI_PENDING2	0x0D /* R */
25 #define STMFX_REG_IRQ_GPI_PENDING3	0x0E /* R */
26 #define STMFX_REG_GPIO_STATE1		0x10 /* R */
27 #define STMFX_REG_GPIO_STATE2		0x11 /* R */
28 #define STMFX_REG_GPIO_STATE3		0x12 /* R */
29 #define STMFX_REG_IRQ_GPI_SRC1		0x48 /* RW */
30 #define STMFX_REG_IRQ_GPI_SRC2		0x49 /* RW */
31 #define STMFX_REG_IRQ_GPI_SRC3		0x4A /* RW */
32 #define STMFX_REG_IRQ_GPI_EVT1		0x4C /* RW */
33 #define STMFX_REG_IRQ_GPI_EVT2		0x4D /* RW */
34 #define STMFX_REG_IRQ_GPI_EVT3		0x4E /* RW */
35 #define STMFX_REG_IRQ_GPI_TYPE1		0x50 /* RW */
36 #define STMFX_REG_IRQ_GPI_TYPE2		0x51 /* RW */
37 #define STMFX_REG_IRQ_GPI_TYPE3		0x52 /* RW */
38 #define STMFX_REG_IRQ_GPI_ACK1		0x54 /* RW */
39 #define STMFX_REG_IRQ_GPI_ACK2		0x55 /* RW */
40 #define STMFX_REG_IRQ_GPI_ACK3		0x56 /* RW */
41 #define STMFX_REG_GPIO_DIR1		0x60 /* RW */
42 #define STMFX_REG_GPIO_DIR2		0x61 /* RW */
43 #define STMFX_REG_GPIO_DIR3		0x62 /* RW */
44 #define STMFX_REG_GPIO_TYPE1		0x64 /* RW */
45 #define STMFX_REG_GPIO_TYPE2		0x65 /* RW */
46 #define STMFX_REG_GPIO_TYPE3		0x66 /* RW */
47 #define STMFX_REG_GPIO_PUPD1		0x68 /* RW */
48 #define STMFX_REG_GPIO_PUPD2		0x69 /* RW */
49 #define STMFX_REG_GPIO_PUPD3		0x6A /* RW */
50 #define STMFX_REG_GPO_SET1		0x6C /* RW */
51 #define STMFX_REG_GPO_SET2		0x6D /* RW */
52 #define STMFX_REG_GPO_SET3		0x6E /* RW */
53 #define STMFX_REG_GPO_CLR1		0x70 /* RW */
54 #define STMFX_REG_GPO_CLR2		0x71 /* RW */
55 #define STMFX_REG_GPO_CLR3		0x72 /* RW */
56 
57 #define STMFX_REG_MAX			0xB0
58 
59 /* MFX boot time is around 10ms, so after reset, we have to wait this delay */
60 #define STMFX_BOOT_TIME_MS 10
61 
62 /* STMFX_REG_CHIP_ID bitfields */
63 #define STMFX_REG_CHIP_ID_MASK		GENMASK(7, 0)
64 
65 /* STMFX_REG_SYS_CTRL bitfields */
66 #define STMFX_REG_SYS_CTRL_GPIO_EN	BIT(0)
67 #define STMFX_REG_SYS_CTRL_TS_EN	BIT(1)
68 #define STMFX_REG_SYS_CTRL_IDD_EN	BIT(2)
69 #define STMFX_REG_SYS_CTRL_ALTGPIO_EN	BIT(3)
70 #define STMFX_REG_SYS_CTRL_SWRST	BIT(7)
71 
72 /* STMFX_REG_IRQ_OUT_PIN bitfields */
73 #define STMFX_REG_IRQ_OUT_PIN_TYPE	BIT(0) /* 0-OD 1-PP */
74 #define STMFX_REG_IRQ_OUT_PIN_POL	BIT(1) /* 0-active LOW 1-active HIGH */
75 
76 /* STMFX_REG_IRQ_(SRC_EN/PENDING/ACK) bit shift */
77 enum stmfx_irqs {
78 	STMFX_REG_IRQ_SRC_EN_GPIO = 0,
79 	STMFX_REG_IRQ_SRC_EN_IDD,
80 	STMFX_REG_IRQ_SRC_EN_ERROR,
81 	STMFX_REG_IRQ_SRC_EN_TS_DET,
82 	STMFX_REG_IRQ_SRC_EN_TS_NE,
83 	STMFX_REG_IRQ_SRC_EN_TS_TH,
84 	STMFX_REG_IRQ_SRC_EN_TS_FULL,
85 	STMFX_REG_IRQ_SRC_EN_TS_OVF,
86 	STMFX_REG_IRQ_SRC_MAX,
87 };
88 
89 enum stmfx_functions {
90 	STMFX_FUNC_GPIO		= BIT(0), /* GPIO[15:0] */
91 	STMFX_FUNC_ALTGPIO_LOW	= BIT(1), /* aGPIO[3:0] */
92 	STMFX_FUNC_ALTGPIO_HIGH = BIT(2), /* aGPIO[7:4] */
93 	STMFX_FUNC_TS		= BIT(3),
94 	STMFX_FUNC_IDD		= BIT(4),
95 };
96 
97 /**
98  * struct stmfx_ddata - STMFX MFD structure
99  * @device:		device reference used for logs
100  * @map:		register map
101  * @vdd:		STMFX power supply
102  * @irq_domain:		IRQ domain
103  * @lock:		IRQ bus lock
104  * @irq_src:		cache of IRQ_SRC_EN register for bus_lock
105  * @bkp_sysctrl:	backup of SYS_CTRL register for suspend/resume
106  * @bkp_irqoutpin:	backup of IRQ_OUT_PIN register for suspend/resume
107  */
108 struct stmfx {
109 	struct device *dev;
110 	struct regmap *map;
111 	struct regulator *vdd;
112 	int irq;
113 	struct irq_domain *irq_domain;
114 	struct mutex lock; /* IRQ bus lock */
115 	u8 irq_src;
116 	u8 bkp_sysctrl;
117 	u8 bkp_irqoutpin;
118 };
119 
120 int stmfx_function_enable(struct stmfx *stmfx, u32 func);
121 int stmfx_function_disable(struct stmfx *stmfx, u32 func);
122 #endif
123