input: sensor: add cm36283 devicetree support

Add Capella cm36283 ambient light/proximity sensor devicetree support to make it compatible with the current Linux kernel structure. Change-Id: I23d7916480d1924b4a0a8121b2a587993a1d4b61 Signed-off-by: Oliver Wang <mengmeng@codeaurora.org>
2024-11-01 02:21:16 +00:00 · 2013-08-23 13:42:10 +08:00 · 2013-08-23 13:42:10 +08:00 · e63fc3c340
commit e63fc3c340
parent 574a33be22
4 changed files with 152 additions and 7 deletions
--- a/Documentation/devicetree/bindings/input/misc/cm36283.txt
+++ b/Documentation/devicetree/bindings/input/misc/cm36283.txt
@ -0,0 +1,40 @@
+Capella cm36283 L/P sensor
+
+Required properties:
+
+ - compatible		: Should be "capella,cm36283".
+ - reg				: i2c slave address of the device.
+ - interrupt-parent	: Parent of interrupt.
+ - interrupts		: L/P sample interrupt to indicate new data ready.
+ - vdd-supply		: Power supply needed to power up the device.
+ - vio-supply		: IO power supply needed for IO and I2C.
+ - capella,interrupt-gpio	: The gpio pin for the interrupt.
+ - capella,levels	: The adc value for light sensor to trigger different light level.
+ - capella,ps_close_thd_set	: The threshold adc value for proximity sensor to trigger close  interrupt.
+ - capella,ps_away_thd_set: The threshold adc value for proximity sensor to trigger away interrupt.
+ - capella,ls_cmd	: The initial value to configure cm36283 ALS_CONF register.
+ - capella,ps_conf1_val	: The initial value to configure cm36283 PS_CONF1 register.
+ - capella,ps_conf3_val	: The initial value to configure cm36283 PS_CONF3 register.
+
+Optional properties:
+
+ - capella,use-polling	: Property to specify if using polling instead of interrupt for adc value report.
+
+Example:
+
+		capella@60 {
+				compatible = "capella,cm36283";
+				reg = <0x60>;
+				interrupt-parent = <&msmgpio>;
+				interrupts = <80 0x2>;
+				vdd-supply = <&pm8110_l19>;
+				vio-supply = <&pm8110_l14>;
+				capella,use-polling;
+				capella,interrupt-gpio = <80>;
+				capella,levels = <0x0A 0xA0 0xE1 0x140 0x280 0x500 0xA28 0x16A8 0x1F40 0x2800>;
+				capella,ps_close_thd_set = <0xa>;
+				capella,ps_away_thd_set = <0x5>;
+				capella,ls_cmd = <0x44>;  /* PS_IT=160ms, INT_PERS=2*/
+				capella,ps_conf1_val = <0x0006>;  /*CM36283_PS_ITB_1_2 | CM36283_PS_DR_1_40| CM36283_PS_IT_1T | CM36283_PS_PERS_2 | CM36283_PS_RES_1*/
+				capella,ps_conf3_val = <0x3010>;  /* CM36283_PS_MS_NORMAL | CM36283_PS_PROL_255 | CM36283_PS_SMART_PERS_ENABLE, */
+		};
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@ -13,6 +13,7 @@ arm	ARM Ltd.
 atmel	Atmel Corporation
 bosch	Bosch Sensortec GmbH
 brcm	Broadcom Corporation
+capella	Capella Microsystems, Inc.
 cavium	Cavium, Inc.
 chrp	Common Hardware Reference Platform
 cirrus	Cirrus Logic, Inc.
--- a/drivers/input/misc/cm36283.c
+++ b/drivers/input/misc/cm36283.c
@ -2,7 +2,9 @@
 *
 * Copyright (C) 2012 Capella Microsystems Inc.
 * Author: Frank Hsieh <pengyueh@gmail.com>
- *                                    
+ *
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
@ -32,6 +34,7 @@
 #include <linux/wakelock.h>
 #include <linux/jiffies.h>
 #include <linux/cm36283.h>
+#include <linux/of_gpio.h>

 #include <asm/uaccess.h>
 #include <asm/mach-types.h>
@ -1274,6 +1277,78 @@ static void cm36283_late_resume(struct early_suspend *h)
 }
 #endif

+static int cm36283_parse_dt(struct device *dev,
+				struct cm36283_platform_data *pdata)
+{
+	struct device_node *np = dev->of_node;
+	u32	levels[CM36283_LEVELS_SIZE], i;
+	u32 temp_val;
+	int rc;
+
+	rc = of_get_named_gpio_flags(np, "capella,interrupt-gpio",
+			0, NULL);
+	if (rc < 0) {
+		dev_err(dev, "Unable to read interrupt pin number\n");
+		return rc;
+	} else {
+		pdata->intr = rc;
+	}
+
+	rc = of_property_read_u32_array(np, "capella,levels", levels,
+			CM36283_LEVELS_SIZE);
+	if (rc) {
+		dev_err(dev, "Unable to read levels data\n");
+		return rc;
+	} else {
+		for (i = 0; i < CM36283_LEVELS_SIZE; i++)
+			pdata->levels[i] = levels[i];
+	}
+
+	rc = of_property_read_u32(np, "capella,ps_close_thd_set", &temp_val);
+	if (rc) {
+		dev_err(dev, "Unable to read ps_close_thd_set\n");
+		return rc;
+	} else {
+		pdata->ps_close_thd_set = (u8)temp_val;
+	}
+
+	rc = of_property_read_u32(np, "capella,ps_away_thd_set", &temp_val);
+	if (rc) {
+		dev_err(dev, "Unable to read ps_away_thd_set\n");
+		return rc;
+	} else {
+		pdata->ps_away_thd_set = (u8)temp_val;
+	}
+
+	rc = of_property_read_u32(np, "capella,ls_cmd", &temp_val);
+	if (rc) {
+		dev_err(dev, "Unable to read ls_cmd\n");
+		return rc;
+	} else {
+		pdata->ls_cmd = (u16)temp_val;
+	}
+
+	rc = of_property_read_u32(np, "capella,ps_conf1_val", &temp_val);
+	if (rc) {
+		dev_err(dev, "Unable to read ps_conf1_val\n");
+		return rc;
+	} else {
+		pdata->ps_conf1_val = (u16)temp_val;
+	}
+
+	rc = of_property_read_u32(np, "capella,ps_conf3_val", &temp_val);
+	if (rc) {
+		dev_err(dev, "Unable to read ps_conf3_val\n");
+		return rc;
+	} else {
+		pdata->ps_conf3_val = (u16)temp_val;
+	}
+
+	pdata->polling = of_property_read_bool(np, "capella,use-polling");
+
+	return 0;
+}
+
 static int cm36283_probe(struct i2c_client *client,
 	const struct i2c_device_id *id)
 {
@ -1291,12 +1366,29 @@ static int cm36283_probe(struct i2c_client *client,
 	/*D("[CM36283] %s: client->irq = %d\n", __func__, client->irq);*/

 	lpi->i2c_client = client;
-	pdata = client->dev.platform_data;
-	if (!pdata) {
-		pr_err("[PS][CM36283 error]%s: Assign platform_data error!!\n",
-			__func__);
-		ret = -EBUSY;
-		goto err_platform_data_null;
+
+	if (client->dev.of_node) {
+		pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+		if (!pdata) {
+			dev_err(&client->dev, "Failed to allocate memory for pdata\n");
+			ret = -ENOMEM;
+			goto err_platform_data_null;
+		}
+
+		ret = cm36283_parse_dt(&client->dev, pdata);
+		pdata->slave_addr = client->addr;
+		if (ret) {
+			dev_err(&client->dev, "Failed to get pdata from device tree\n");
+			goto err_parse_dt;
+		}
+	} else {
+		pdata = client->dev.platform_data;
+		if (!pdata) {
+			dev_err(&client->dev, "%s: Assign platform_data error!!\n",
+					__func__);
+			ret = -EBUSY;
+			goto err_platform_data_null;
+		}
 	}

 	lpi->irq = client->irq;
@ -1502,6 +1594,9 @@ err_lightsensor_setup:
 	mutex_destroy(&als_enable_mutex);
 	mutex_destroy(&als_disable_mutex);
 	mutex_destroy(&als_get_adc_mutex);
+err_parse_dt:
+	if (client->dev.of_node && (pdata != NULL))
+		devm_kfree(&client->dev, pdata);
 err_platform_data_null:
 	kfree(lpi);
 	return ret;
@ -1769,6 +1864,11 @@ static const struct i2c_device_id cm36283_i2c_id[] = {
 	{}
 };

+static struct of_device_id cm36283_match_table[] = {
+	{ .compatible = "capella,cm36283",},
+	{ },
+};
+
 static struct i2c_driver cm36283_driver = {
 	.id_table = cm36283_i2c_id,
 	.probe = cm36283_probe,
@ -1776,6 +1876,7 @@ static struct i2c_driver cm36283_driver = {
 		.name = CM36283_I2C_NAME,
 		.owner = THIS_MODULE,
 		.pm = &cm36283_pm,
+		.of_match_table = cm36283_match_table,
 	},
 };

--- a/include/linux/cm36283.h
+++ b/include/linux/cm36283.h
@ -120,6 +120,8 @@
 extern unsigned int ps_kparam1;
 extern unsigned int ps_kparam2;

+#define CM36283_LEVELS_SIZE		10
+
 struct cm36283_platform_data {
 	int intr;
 	uint16_t levels[10];
@ -131,6 +133,7 @@ struct cm36283_platform_data {
 	uint16_t ls_cmd;
 	uint16_t ps_conf1_val;
 	uint16_t ps_conf3_val;	
+	bool polling;
 };

 #endif