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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / 9d19426ed8f8cb5d468659caddeeeef4b147669b / . / drivers / mfd / intel_soc_pmic_mrfld.c
blob: 26a1551c5faf3233bf49cf458595380acea67493 [file] [log] [blame]
Andy Shevchenkob9a801d2019-08-01 22:03:35 +0300[diff] [blame]1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Device access for Basin Cove PMIC
4 *
5 * Copyright (c) 2019, Intel Corporation.
6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 */
8
9#include <linux/acpi.h>
10#include <linux/interrupt.h>
11#include <linux/mfd/core.h>
12#include <linux/mfd/intel_soc_pmic.h>
13#include <linux/mfd/intel_soc_pmic_mrfld.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/regmap.h>
17
18#include <asm/intel_scu_ipc.h>
19
20/*
21 * Level 2 IRQs
22 *
23 * Firmware on the systems with Basin Cove PMIC services Level 1 IRQs
24 * without an assistance. Thus, each of the Level 1 IRQ is represented
25 * as a separate RTE in IOAPIC.
26 */
27static struct resource irq_level2_resources[] = {
28 DEFINE_RES_IRQ(0), /* power button */
29 DEFINE_RES_IRQ(0), /* TMU */
30 DEFINE_RES_IRQ(0), /* thermal */
31 DEFINE_RES_IRQ(0), /* BCU */
32 DEFINE_RES_IRQ(0), /* ADC */
33 DEFINE_RES_IRQ(0), /* charger */
34 DEFINE_RES_IRQ(0), /* GPIO */
35};
36
37static const struct mfd_cell bcove_dev[] = {
38 {
39 .name = "mrfld_bcove_pwrbtn",
40 .num_resources = 1,
41 .resources = &irq_level2_resources[0],
42 }, {
43 .name = "mrfld_bcove_tmu",
44 .num_resources = 1,
45 .resources = &irq_level2_resources[1],
46 }, {
47 .name = "mrfld_bcove_thermal",
48 .num_resources = 1,
49 .resources = &irq_level2_resources[2],
50 }, {
51 .name = "mrfld_bcove_bcu",
52 .num_resources = 1,
53 .resources = &irq_level2_resources[3],
54 }, {
55 .name = "mrfld_bcove_adc",
56 .num_resources = 1,
57 .resources = &irq_level2_resources[4],
58 }, {
59 .name = "mrfld_bcove_charger",
60 .num_resources = 1,
61 .resources = &irq_level2_resources[5],
62 }, {
63 .name = "mrfld_bcove_pwrsrc",
64 .num_resources = 1,
65 .resources = &irq_level2_resources[5],
66 }, {
67 .name = "mrfld_bcove_gpio",
68 .num_resources = 1,
69 .resources = &irq_level2_resources[6],
70 },
71 { .name = "mrfld_bcove_region", },
72};
73
74static int bcove_ipc_byte_reg_read(void *context, unsigned int reg,
75 unsigned int *val)
76{
77 u8 ipc_out;
78 int ret;
79
80 ret = intel_scu_ipc_ioread8(reg, &ipc_out);
81 if (ret)
82 return ret;
83
84 *val = ipc_out;
85 return 0;
86}
87
88static int bcove_ipc_byte_reg_write(void *context, unsigned int reg,
89 unsigned int val)
90{
91 u8 ipc_in = val;
92 int ret;
93
94 ret = intel_scu_ipc_iowrite8(reg, ipc_in);
95 if (ret)
96 return ret;
97
98 return 0;
99}
100
101static const struct regmap_config bcove_regmap_config = {
102 .reg_bits = 16,
103 .val_bits = 8,
104 .max_register = 0xff,
105 .reg_write = bcove_ipc_byte_reg_write,
106 .reg_read = bcove_ipc_byte_reg_read,
107};
108
109static int bcove_probe(struct platform_device *pdev)
110{
111 struct device *dev = &pdev->dev;
112 struct intel_soc_pmic *pmic;
113 unsigned int i;
114 int ret;
115
116 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
117 if (!pmic)
118 return -ENOMEM;
119
120 platform_set_drvdata(pdev, pmic);
121 pmic->dev = &pdev->dev;
122
123 pmic->regmap = devm_regmap_init(dev, NULL, pmic, &bcove_regmap_config);
124 if (IS_ERR(pmic->regmap))
125 return PTR_ERR(pmic->regmap);
126
127 for (i = 0; i < ARRAY_SIZE(irq_level2_resources); i++) {
128 ret = platform_get_irq(pdev, i);
129 if (ret < 0)
130 return ret;
131
132 irq_level2_resources[i].start = ret;
133 irq_level2_resources[i].end = ret;
134 }
135
136 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
137 bcove_dev, ARRAY_SIZE(bcove_dev),
138 NULL, 0, NULL);
139}
140
141static const struct acpi_device_id bcove_acpi_ids[] = {
142 { "INTC100E" },
143 {}
144};
145MODULE_DEVICE_TABLE(acpi, bcove_acpi_ids);
146
147static struct platform_driver bcove_driver = {
148 .driver = {
149 .name = "intel_soc_pmic_mrfld",
150 .acpi_match_table = bcove_acpi_ids,
151 },
152 .probe = bcove_probe,
153};
154module_platform_driver(bcove_driver);
155
156MODULE_DESCRIPTION("IPC driver for Intel SoC Basin Cove PMIC");
157MODULE_LICENSE("GPL v2");