forked from ~ljy/RK356X_SDK_RELEASE
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2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/drivers/input/keyboard/snvs_pwrkey.c
....@@ -3,6 +3,7 @@
33 // Driver for the IMX SNVS ON/OFF Power Key
44 // Copyright (C) 2015 Freescale Semiconductor, Inc. All Rights Reserved.
55 
6
+#include <linux/clk.h>
67 #include <linux/device.h>
78 #include <linux/err.h>
89 #include <linux/init.h>
....@@ -15,18 +16,20 @@
1516 #include <linux/of.h>
1617 #include <linux/of_address.h>
1718 #include <linux/platform_device.h>
19
+#include <linux/pm_wakeirq.h>
1820 #include <linux/mfd/syscon.h>
1921 #include <linux/regmap.h>
2022 
21
-#define SNVS_LPSR_REG	0x4C	/* LP Status Register */
22
-#define SNVS_LPCR_REG	0x38	/* LP Control Register */
23
-#define SNVS_HPSR_REG	0x14
24
-#define SNVS_HPSR_BTN	BIT(6)
25
-#define SNVS_LPSR_SPO	BIT(18)
26
-#define SNVS_LPCR_DEP_EN BIT(5)
23
+#define SNVS_HPVIDR1_REG	0xBF8
24
+#define SNVS_LPSR_REG		0x4C	/* LP Status Register */
25
+#define SNVS_LPCR_REG		0x38	/* LP Control Register */
26
+#define SNVS_HPSR_REG		0x14
27
+#define SNVS_HPSR_BTN		BIT(6)
28
+#define SNVS_LPSR_SPO		BIT(18)
29
+#define SNVS_LPCR_DEP_EN	BIT(5)
2730 
28
-#define DEBOUNCE_TIME 30
29
-#define REPEAT_INTERVAL 60
31
+#define DEBOUNCE_TIME		30
32
+#define REPEAT_INTERVAL		60
3033 
3134 struct pwrkey_drv_data {
3235 	struct regmap *snvs;
....@@ -36,6 +39,7 @@
3639 	int wakeup;
3740 	struct timer_list check_timer;
3841 	struct input_dev *input;
42
+	u8 minor_rev;
3943 };
4044 
4145 static void imx_imx_snvs_check_for_events(struct timer_list *t)
....@@ -66,18 +70,39 @@
6670 {
6771 	struct platform_device *pdev = dev_id;
6872 	struct pwrkey_drv_data *pdata = platform_get_drvdata(pdev);
73
+	struct input_dev *input = pdata->input;
6974 	u32 lp_status;
7075 
71
-	pm_wakeup_event(pdata->input->dev.parent, 0);
76
+	pm_wakeup_event(input->dev.parent, 0);
7277 
7378 	regmap_read(pdata->snvs, SNVS_LPSR_REG, &lp_status);
74
-	if (lp_status & SNVS_LPSR_SPO)
75
-		mod_timer(&pdata->check_timer, jiffies + msecs_to_jiffies(DEBOUNCE_TIME));
79
+	if (lp_status & SNVS_LPSR_SPO) {
80
+		if (pdata->minor_rev == 0) {
81
+			/*
82
+			 * The first generation i.MX6 SoCs only sends an
83
+			 * interrupt on button release. To mimic power-key
84
+			 * usage, we'll prepend a press event.
85
+			 */
86
+			input_report_key(input, pdata->keycode, 1);
87
+			input_sync(input);
88
+			input_report_key(input, pdata->keycode, 0);
89
+			input_sync(input);
90
+			pm_relax(input->dev.parent);
91
+		} else {
92
+			mod_timer(&pdata->check_timer,
93
+			          jiffies + msecs_to_jiffies(DEBOUNCE_TIME));
94
+		}
95
+	}
7696 
7797 	/* clear SPO status */
7898 	regmap_write(pdata->snvs, SNVS_LPSR_REG, SNVS_LPSR_SPO);
7999 
80100 	return IRQ_HANDLED;
101
+}
102
+
103
+static void imx_snvs_pwrkey_disable_clk(void *data)
104
+{
105
+	clk_disable_unprepare(data);
81106 }
82107 
83108 static void imx_snvs_pwrkey_act(void *pdata)
....@@ -89,10 +114,12 @@
89114 
90115 static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
91116 {
92
-	struct pwrkey_drv_data *pdata = NULL;
93
-	struct input_dev *input = NULL;
117
+	struct pwrkey_drv_data *pdata;
118
+	struct input_dev *input;
94119 	struct device_node *np;
120
+	struct clk *clk;
95121 	int error;
122
+	u32 vid;
96123 
97124 	/* Get SNVS register Page */
98125 	np = pdev->dev.of_node;
....@@ -114,13 +141,36 @@
114141 		dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n");
115142 	}
116143 
144
+	clk = devm_clk_get_optional(&pdev->dev, NULL);
145
+	if (IS_ERR(clk)) {
146
+		dev_err(&pdev->dev, "Failed to get snvs clock (%pe)\n", clk);
147
+		return PTR_ERR(clk);
148
+	}
149
+
150
+	error = clk_prepare_enable(clk);
151
+	if (error) {
152
+		dev_err(&pdev->dev, "Failed to enable snvs clock (%pe)\n",
153
+			ERR_PTR(error));
154
+		return error;
155
+	}
156
+
157
+	error = devm_add_action_or_reset(&pdev->dev,
158
+					 imx_snvs_pwrkey_disable_clk, clk);
159
+	if (error) {
160
+		dev_err(&pdev->dev,
161
+			"Failed to register clock cleanup handler (%pe)\n",
162
+			ERR_PTR(error));
163
+		return error;
164
+	}
165
+
117166 	pdata->wakeup = of_property_read_bool(np, "wakeup-source");
118167 
119168 	pdata->irq = platform_get_irq(pdev, 0);
120
-	if (pdata->irq < 0) {
121
-		dev_err(&pdev->dev, "no irq defined in platform data\n");
169
+	if (pdata->irq < 0)
122170 		return -EINVAL;
123
-	}
171
+
172
+	regmap_read(pdata->snvs, SNVS_HPVIDR1_REG, &vid);
173
+	pdata->minor_rev = vid & 0xff;
124174 
125175 	regmap_update_bits(pdata->snvs, SNVS_LPCR_REG, SNVS_LPCR_DEP_EN, SNVS_LPCR_DEP_EN);
126176 
....@@ -167,28 +217,9 @@
167217 	}
168218 
169219 	device_init_wakeup(&pdev->dev, pdata->wakeup);
170
-
171
-	return 0;
172
-}
173
-
174
-static int __maybe_unused imx_snvs_pwrkey_suspend(struct device *dev)
175
-{
176
-	struct platform_device *pdev = to_platform_device(dev);
177
-	struct pwrkey_drv_data *pdata = platform_get_drvdata(pdev);
178
-
179
-	if (device_may_wakeup(&pdev->dev))
180
-		enable_irq_wake(pdata->irq);
181
-
182
-	return 0;
183
-}
184
-
185
-static int __maybe_unused imx_snvs_pwrkey_resume(struct device *dev)
186
-{
187
-	struct platform_device *pdev = to_platform_device(dev);
188
-	struct pwrkey_drv_data *pdata = platform_get_drvdata(pdev);
189
-
190
-	if (device_may_wakeup(&pdev->dev))
191
-		disable_irq_wake(pdata->irq);
220
+	error = dev_pm_set_wake_irq(&pdev->dev, pdata->irq);
221
+	if (error)
222
+		dev_err(&pdev->dev, "irq wake enable failed.\n");
192223 
193224 	return 0;
194225 }
....@@ -199,13 +230,9 @@
199230 };
200231 MODULE_DEVICE_TABLE(of, imx_snvs_pwrkey_ids);
201232 
202
-static SIMPLE_DEV_PM_OPS(imx_snvs_pwrkey_pm_ops, imx_snvs_pwrkey_suspend,
203
-				imx_snvs_pwrkey_resume);
204
-
205233 static struct platform_driver imx_snvs_pwrkey_driver = {
206234 	.driver = {
207235 		.name = "snvs_pwrkey",
208
-		.pm     = &imx_snvs_pwrkey_pm_ops,
209236 		.of_match_table = imx_snvs_pwrkey_ids,
210237 	},
211238 	.probe = imx_snvs_pwrkey_probe,