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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c 
 kernel/drivers/mfd/sprd-sc27xx-spi.c
....@@ -1,23 +1,18 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright (C) 2017 Spreadtrum Communications Inc.
3
- *
4
- * This software is licensed under the terms of the GNU General Public
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- * License version 2, as published by the Free Software Foundation, and
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- * may be copied, distributed, and modified under those terms.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
124  */
135 
146 #include <linux/interrupt.h>
157 #include <linux/kernel.h>
168 #include <linux/module.h>
179 #include <linux/mfd/core.h>
10
+#include <linux/mfd/sc27xx-pmic.h>
1811 #include <linux/of_device.h>
12
+#include <linux/of_platform.h>
1913 #include <linux/regmap.h>
2014 #include <linux/spi/spi.h>
15
+#include <uapi/linux/usb/charger.h>
2116 
2217 #define SPRD_PMIC_INT_MASK_STATUS	0x0
2318 #define SPRD_PMIC_INT_RAW_STATUS	0x4
....@@ -25,6 +20,16 @@
2520 
2621 #define SPRD_SC2731_IRQ_BASE		0x140
2722 #define SPRD_SC2731_IRQ_NUMS		16
23
+#define SPRD_SC2731_CHG_DET		0xedc
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+
25
+/* PMIC charger detection definition */
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+#define SPRD_PMIC_CHG_DET_DELAY_US	200000
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+#define SPRD_PMIC_CHG_DET_TIMEOUT	2000000
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+#define SPRD_PMIC_CHG_DET_DONE		BIT(11)
29
+#define SPRD_PMIC_SDP_TYPE		BIT(7)
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+#define SPRD_PMIC_DCP_TYPE		BIT(6)
31
+#define SPRD_PMIC_CDP_TYPE		BIT(5)
32
+#define SPRD_PMIC_CHG_TYPE_MASK		GENMASK(7, 5)
2833 
2934 struct sprd_pmic {
3035 	struct regmap *regmap;
....@@ -32,12 +37,14 @@
3237 	struct regmap_irq *irqs;
3338 	struct regmap_irq_chip irq_chip;
3439 	struct regmap_irq_chip_data *irq_data;
40
+	const struct sprd_pmic_data *pdata;
3541 	int irq;
3642 };
3743 
3844 struct sprd_pmic_data {
3945 	u32 irq_base;
4046 	u32 num_irqs;
47
+	u32 charger_det;
4148 };
4249 
4350 /*
....@@ -48,74 +55,45 @@
4855 static const struct sprd_pmic_data sc2731_data = {
4956 	.irq_base = SPRD_SC2731_IRQ_BASE,
5057 	.num_irqs = SPRD_SC2731_IRQ_NUMS,
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+	.charger_det = SPRD_SC2731_CHG_DET,
5159 };
5260 
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-static const struct mfd_cell sprd_pmic_devs[] = {
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-	{
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-		.name = "sc27xx-wdt",
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-		.of_compatible = "sprd,sc27xx-wdt",
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-	}, {
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-		.name = "sc27xx-rtc",
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-		.of_compatible = "sprd,sc27xx-rtc",
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-	}, {
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-		.name = "sc27xx-charger",
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-		.of_compatible = "sprd,sc27xx-charger",
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-	}, {
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-		.name = "sc27xx-chg-timer",
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-		.of_compatible = "sprd,sc27xx-chg-timer",
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-	}, {
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-		.name = "sc27xx-fast-chg",
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-		.of_compatible = "sprd,sc27xx-fast-chg",
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-	}, {
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-		.name = "sc27xx-chg-wdt",
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-		.of_compatible = "sprd,sc27xx-chg-wdt",
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-	}, {
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-		.name = "sc27xx-typec",
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-		.of_compatible = "sprd,sc27xx-typec",
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-	}, {
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-		.name = "sc27xx-flash",
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-		.of_compatible = "sprd,sc27xx-flash",
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-	}, {
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-		.name = "sc27xx-eic",
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-		.of_compatible = "sprd,sc27xx-eic",
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-	}, {
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-		.name = "sc27xx-efuse",
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-		.of_compatible = "sprd,sc27xx-efuse",
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-	}, {
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-		.name = "sc27xx-thermal",
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-		.of_compatible = "sprd,sc27xx-thermal",
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-	}, {
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-		.name = "sc27xx-adc",
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-		.of_compatible = "sprd,sc27xx-adc",
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-	}, {
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-		.name = "sc27xx-audio-codec",
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-		.of_compatible = "sprd,sc27xx-audio-codec",
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-	}, {
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-		.name = "sc27xx-regulator",
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-		.of_compatible = "sprd,sc27xx-regulator",
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-	}, {
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-		.name = "sc27xx-vibrator",
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-		.of_compatible = "sprd,sc27xx-vibrator",
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-	}, {
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-		.name = "sc27xx-keypad-led",
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-		.of_compatible = "sprd,sc27xx-keypad-led",
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-	}, {
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-		.name = "sc27xx-bltc",
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-		.of_compatible = "sprd,sc27xx-bltc",
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-	}, {
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-		.name = "sc27xx-fgu",
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-		.of_compatible = "sprd,sc27xx-fgu",
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-	}, {
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-		.name = "sc27xx-7sreset",
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-		.of_compatible = "sprd,sc27xx-7sreset",
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-	}, {
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-		.name = "sc27xx-poweroff",
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-		.of_compatible = "sprd,sc27xx-poweroff",
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-	}, {
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-		.name = "sc27xx-syscon",
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-		.of_compatible = "sprd,sc27xx-syscon",
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-	},
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-};
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+enum usb_charger_type sprd_pmic_detect_charger_type(struct device *dev)
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+{
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+	struct spi_device *spi = to_spi_device(dev);
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+	struct sprd_pmic *ddata = spi_get_drvdata(spi);
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+	const struct sprd_pmic_data *pdata = ddata->pdata;
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+	enum usb_charger_type type;
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+	u32 val;
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+	int ret;
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+
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+	ret = regmap_read_poll_timeout(ddata->regmap, pdata->charger_det, val,
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+				       (val & SPRD_PMIC_CHG_DET_DONE),
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+				       SPRD_PMIC_CHG_DET_DELAY_US,
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+				       SPRD_PMIC_CHG_DET_TIMEOUT);
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+	if (ret) {
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+		dev_err(&spi->dev, "failed to detect charger type\n");
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+		return UNKNOWN_TYPE;
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+	}
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+
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+	switch (val & SPRD_PMIC_CHG_TYPE_MASK) {
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+	case SPRD_PMIC_CDP_TYPE:
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+		type = CDP_TYPE;
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+		break;
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+	case SPRD_PMIC_DCP_TYPE:
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+		type = DCP_TYPE;
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+		break;
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+	case SPRD_PMIC_SDP_TYPE:
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+		type = SDP_TYPE;
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+		break;
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+	default:
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+		type = UNKNOWN_TYPE;
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+		break;
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+	}
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+
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+	return type;
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+}
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+EXPORT_SYMBOL_GPL(sprd_pmic_detect_charger_type);
11997 
12098 static int sprd_pmic_spi_write(void *context, const void *data, size_t count)
12199 {
....@@ -189,6 +167,7 @@
189167 	spi_set_drvdata(spi, ddata);
190168 	ddata->dev = &spi->dev;
191169 	ddata->irq = spi->irq;
170
+	ddata->pdata = pdata;
192171 
193172 	ddata->irq_chip.name = dev_name(&spi->dev);
194173 	ddata->irq_chip.status_base =
....@@ -206,10 +185,8 @@
206185 		return -ENOMEM;
207186 
208187 	ddata->irq_chip.irqs = ddata->irqs;
209
-	for (i = 0; i < pdata->num_irqs; i++) {
210
-		ddata->irqs[i].reg_offset = i / pdata->num_irqs;
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-		ddata->irqs[i].mask = BIT(i % pdata->num_irqs);
212
-	}
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+	for (i = 0; i < pdata->num_irqs; i++)
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+		ddata->irqs[i].mask = BIT(i);
213190 
214191 	ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq,
215192 				       IRQF_ONESHOT, 0,
....@@ -219,12 +196,9 @@
219196 		return ret;
220197 	}
221198 
222
-	ret = devm_mfd_add_devices(&spi->dev, PLATFORM_DEVID_AUTO,
223
-				   sprd_pmic_devs, ARRAY_SIZE(sprd_pmic_devs),
224
-				   NULL, 0,
225
-				   regmap_irq_get_domain(ddata->irq_data));
199
+	ret = devm_of_platform_populate(&spi->dev);
226200 	if (ret) {
227
-		dev_err(&spi->dev, "Failed to register device %d\n", ret);
201
+		dev_err(&spi->dev, "Failed to populate sub-devices %d\n", ret);
228202 		return ret;
229203 	}
230204 
....@@ -265,7 +239,6 @@
265239 static struct spi_driver sprd_pmic_driver = {
266240 	.driver = {
267241 		.name = "sc27xx-pmic",
268
-		.bus = &spi_bus_type,
269242 		.of_match_table = sprd_pmic_match,
270243 		.pm = &sprd_pmic_pm_ops,
271244 	},