1 // SPDX-License-Identifier: GPL-2.0
3 * Device driver for regulators in HISI PMIC IC
5 * Copyright (c) 2013 Linaro Ltd.
6 * Copyright (c) 2011 Hisilicon.
7 * Copyright (c) 2020-2021 Huawei Technologies Co., Ltd
10 #include <linux/bitops.h>
11 #include <linux/interrupt.h>
12 #include <linux/irq.h>
13 #include <linux/mfd/core.h>
14 #include <linux/mfd/hi6421-spmi-pmic.h>
15 #include <linux/module.h>
16 #include <linux/of_gpio.h>
17 #include <linux/platform_device.h>
18 #include <linux/slab.h>
19 #include <linux/spmi.h>
21 enum hi6421_spmi_pmic_irq_list {
39 #define HISI_IRQ_ARRAY 2
40 #define HISI_IRQ_NUM (HISI_IRQ_ARRAY * 8)
42 #define HISI_IRQ_KEY_NUM 0
45 #define HISI_IRQ_KEY_VALUE (BIT(POWERKEY_DOWN) | BIT(POWERKEY_UP))
46 #define HISI_MASK GENMASK(HISI_BITS - 1, 0)
49 * The IRQs are mapped as:
51 * ====================== ============= ============ =====
52 * IRQ MASK REGISTER IRQ REGISTER BIT
53 * ====================== ============= ============ =====
54 * OTMP 0x0202 0x212 bit 0
55 * VBUS_CONNECT 0x0202 0x212 bit 1
56 * VBUS_DISCONNECT 0x0202 0x212 bit 2
57 * ALARMON_R 0x0202 0x212 bit 3
58 * HOLD_6S 0x0202 0x212 bit 4
59 * HOLD_1S 0x0202 0x212 bit 5
60 * POWERKEY_UP 0x0202 0x212 bit 6
61 * POWERKEY_DOWN 0x0202 0x212 bit 7
63 * OCP_SCP_R 0x0203 0x213 bit 0
64 * COUL_R 0x0203 0x213 bit 1
65 * SIM0_HPD_R 0x0203 0x213 bit 2
66 * SIM0_HPD_F 0x0203 0x213 bit 3
67 * SIM1_HPD_R 0x0203 0x213 bit 4
68 * SIM1_HPD_F 0x0203 0x213 bit 5
69 * ====================== ============= ============ =====
71 #define SOC_PMIC_IRQ_MASK_0_ADDR 0x0202
72 #define SOC_PMIC_IRQ0_ADDR 0x0212
74 #define IRQ_MASK_REGISTER(irq_data) (SOC_PMIC_IRQ_MASK_0_ADDR + \
75 (irqd_to_hwirq(irq_data) >> 3))
76 #define IRQ_MASK_BIT(irq_data) BIT(irqd_to_hwirq(irq_data) & 0x07)
78 static const struct mfd_cell hi6421v600_devs[] = {
79 { .name = "hi6421v600-regulator", },
82 static irqreturn_t hi6421_spmi_irq_handler(int irq, void *priv)
84 struct hi6421_spmi_pmic *ddata = (struct hi6421_spmi_pmic *)priv;
85 unsigned long pending;
89 for (i = 0; i < HISI_IRQ_ARRAY; i++) {
90 regmap_read(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i, &in);
91 pending = HISI_MASK & in;
92 regmap_write(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i, pending);
94 if (i == HISI_IRQ_KEY_NUM &&
95 (pending & HISI_IRQ_KEY_VALUE) == HISI_IRQ_KEY_VALUE) {
96 generic_handle_irq(ddata->irqs[POWERKEY_DOWN]);
97 generic_handle_irq(ddata->irqs[POWERKEY_UP]);
98 pending &= (~HISI_IRQ_KEY_VALUE);
104 for_each_set_bit(offset, &pending, HISI_BITS)
105 generic_handle_irq(ddata->irqs[offset + i * HISI_BITS]);
111 static void hi6421_spmi_irq_mask(struct irq_data *d)
113 struct hi6421_spmi_pmic *ddata = irq_data_get_irq_chip_data(d);
118 offset = IRQ_MASK_REGISTER(d);
120 spin_lock_irqsave(&ddata->lock, flags);
122 regmap_read(ddata->regmap, offset, &data);
123 data |= IRQ_MASK_BIT(d);
124 regmap_write(ddata->regmap, offset, data);
126 spin_unlock_irqrestore(&ddata->lock, flags);
129 static void hi6421_spmi_irq_unmask(struct irq_data *d)
131 struct hi6421_spmi_pmic *ddata = irq_data_get_irq_chip_data(d);
135 offset = (irqd_to_hwirq(d) >> 3);
136 offset += SOC_PMIC_IRQ_MASK_0_ADDR;
138 spin_lock_irqsave(&ddata->lock, flags);
140 regmap_read(ddata->regmap, offset, &data);
141 data &= ~(1 << (irqd_to_hwirq(d) & 0x07));
142 regmap_write(ddata->regmap, offset, data);
144 spin_unlock_irqrestore(&ddata->lock, flags);
147 static struct irq_chip hi6421_spmi_pmu_irqchip = {
149 .irq_mask = hi6421_spmi_irq_mask,
150 .irq_unmask = hi6421_spmi_irq_unmask,
151 .irq_disable = hi6421_spmi_irq_mask,
152 .irq_enable = hi6421_spmi_irq_unmask,
155 static int hi6421_spmi_irq_map(struct irq_domain *d, unsigned int virq,
158 struct hi6421_spmi_pmic *ddata = d->host_data;
160 irq_set_chip_and_handler_name(virq, &hi6421_spmi_pmu_irqchip,
161 handle_simple_irq, "hisi");
162 irq_set_chip_data(virq, ddata);
163 irq_set_irq_type(virq, IRQ_TYPE_NONE);
168 static const struct irq_domain_ops hi6421_spmi_domain_ops = {
169 .map = hi6421_spmi_irq_map,
170 .xlate = irq_domain_xlate_twocell,
173 static void hi6421_spmi_pmic_irq_init(struct hi6421_spmi_pmic *ddata)
176 unsigned int pending;
178 for (i = 0; i < HISI_IRQ_ARRAY; i++)
179 regmap_write(ddata->regmap, SOC_PMIC_IRQ_MASK_0_ADDR + i,
182 for (i = 0; i < HISI_IRQ_ARRAY; i++) {
183 regmap_read(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i, &pending);
184 regmap_write(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i,
189 static const struct regmap_config regmap_config = {
191 .val_bits = HISI_BITS,
192 .max_register = 0xffff,
196 static int hi6421_spmi_pmic_probe(struct spmi_device *pdev)
198 struct device *dev = &pdev->dev;
199 struct device_node *np = dev->of_node;
200 struct hi6421_spmi_pmic *ddata;
204 ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
208 ddata->regmap = devm_regmap_init_spmi_ext(pdev, ®map_config);
209 if (IS_ERR(ddata->regmap))
210 return PTR_ERR(ddata->regmap);
212 spin_lock_init(&ddata->lock);
216 ddata->gpio = of_get_gpio(np, 0);
220 if (!gpio_is_valid(ddata->gpio))
223 ret = devm_gpio_request_one(dev, ddata->gpio, GPIOF_IN, "pmic");
225 dev_err(dev, "Failed to request gpio%d\n", ddata->gpio);
229 ddata->irq = gpio_to_irq(ddata->gpio);
231 hi6421_spmi_pmic_irq_init(ddata);
233 ddata->irqs = devm_kzalloc(dev, HISI_IRQ_NUM * sizeof(int), GFP_KERNEL);
237 ddata->domain = irq_domain_add_simple(np, HISI_IRQ_NUM, 0,
238 &hi6421_spmi_domain_ops, ddata);
239 if (!ddata->domain) {
240 dev_err(dev, "Failed to create IRQ domain\n");
244 for (i = 0; i < HISI_IRQ_NUM; i++) {
245 virq = irq_create_mapping(ddata->domain, i);
247 dev_err(dev, "Failed to map H/W IRQ\n");
250 ddata->irqs[i] = virq;
253 ret = request_threaded_irq(ddata->irq, hi6421_spmi_irq_handler, NULL,
254 IRQF_TRIGGER_LOW | IRQF_SHARED | IRQF_NO_SUSPEND,
257 dev_err(dev, "Failed to start IRQ handling thread: error %d\n",
262 dev_set_drvdata(&pdev->dev, ddata);
264 ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
265 hi6421v600_devs, ARRAY_SIZE(hi6421v600_devs),
268 dev_err(dev, "Failed to add child devices: %d\n", ret);
273 static void hi6421_spmi_pmic_remove(struct spmi_device *pdev)
275 struct hi6421_spmi_pmic *ddata = dev_get_drvdata(&pdev->dev);
277 free_irq(ddata->irq, ddata);
280 static const struct of_device_id pmic_spmi_id_table[] = {
281 { .compatible = "hisilicon,hi6421-spmi" },
284 MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
286 static struct spmi_driver hi6421_spmi_pmic_driver = {
288 .name = "hi6421-spmi-pmic",
289 .of_match_table = pmic_spmi_id_table,
291 .probe = hi6421_spmi_pmic_probe,
292 .remove = hi6421_spmi_pmic_remove,
294 module_spmi_driver(hi6421_spmi_pmic_driver);
296 MODULE_DESCRIPTION("HiSilicon Hi6421v600 SPMI PMIC driver");
297 MODULE_LICENSE("GPL v2");