motor: max77693: expose min/max/default/threshold in sysfs

based off a similar patch for klte by Kevin Haggerty

Change-Id: If2b4f1f2c0310fc0a6c3fe49fd680973dce28ef5

1 files changed, 58 insertions, 0 deletions

diff --git a/drivers/motor/max77693_haptic.c b/drivers/motor/max77693_haptic.c
index beb7f2a5c8e..9c83c2597ab 100644
--- a/drivers/motor/max77693_haptic.c
+++ b/drivers/motor/max77693_haptic.c
@@ -24,6 +24,11 @@
 #include <linux/mfd/max77693.h>
 #include <linux/mfd/max77693-private.h>
 
+#define PWM_MIN 0
+#define PWM_DEFAULT 50
+#define PWM_THRESH 75
+#define PWM_MAX 100
+
 static unsigned long pwm_val = 50; /* duty in percent */
 static int pwm_duty = 27787; /* duty value, 37050=100%, 27787=50%, 18525=0% */
 
@@ -301,6 +306,42 @@ ssize_t pwm_value_store(struct device *dev,
 static DEVICE_ATTR(pwm_value, S_IRUGO | S_IWUSR,
 		pwm_value_show, pwm_value_store);
 
+static ssize_t pwm_default_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%u\n", PWM_DEFAULT);
+}
+
+static DEVICE_ATTR(pwm_default, S_IRUGO,
+		pwm_default_show, NULL);
+
+static ssize_t pwm_max_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%u\n", PWM_MAX);
+}
+
+static DEVICE_ATTR(pwm_max, S_IRUGO,
+		pwm_max_show, NULL);
+
+static ssize_t pwm_min_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%u\n", PWM_MIN);
+}
+
+static DEVICE_ATTR(pwm_min, S_IRUGO,
+		pwm_min_show, NULL);
+
+static ssize_t pwm_threshold_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%u\n", PWM_THRESH);
+}
+
+static DEVICE_ATTR(pwm_threshold, S_IRUGO,
+		pwm_threshold_show, NULL);
+
 static int max77693_haptic_probe(struct platform_device *pdev)
 {
 	int error = 0;
@@ -378,6 +419,23 @@ static int max77693_haptic_probe(struct platform_device *pdev)
 	if (error < 0) {
 		pr_err("[VIB] create sysfs fail: pwm_value\n");
 	}
+	error = device_create_file(hap_data->tout_dev.dev, &dev_attr_pwm_max);
+	if (error < 0) {
+		pr_err("[VIB] create sysfs fail: pwm_max\n");
+	}
+	error = device_create_file(hap_data->tout_dev.dev, &dev_attr_pwm_min);
+	if (error < 0) {
+		pr_err("[VIB] create sysfs fail: pwm_min\n");
+	}
+	error = device_create_file(hap_data->tout_dev.dev, &dev_attr_pwm_default);
+	if (error < 0) {
+		pr_err("[VIB] create sysfs fail: pwm_default\n");
+	}
+	error = device_create_file(hap_data->tout_dev.dev, &dev_attr_pwm_threshold);
+	if (error < 0) {
+		pr_err("[VIB] create sysfs fail: pwm_threshold\n");
+	}
+
 #endif
 	pr_debug("[VIB] -- %s\n", __func__);