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path: root/drivers/input/misc/pm8941-pwrkey.c
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Diffstat (limited to 'drivers/input/misc/pm8941-pwrkey.c')
-rw-r--r--drivers/input/misc/pm8941-pwrkey.c70
1 files changed, 57 insertions, 13 deletions
diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c
index 18ad956454f1..48153e0ca19a 100644
--- a/drivers/input/misc/pm8941-pwrkey.c
+++ b/drivers/input/misc/pm8941-pwrkey.c
@@ -20,6 +20,7 @@
#include <linux/log2.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
@@ -28,6 +29,7 @@
#define PON_RT_STS 0x10
#define PON_KPDPWR_N_SET BIT(0)
+#define PON_RESIN_N_SET BIT(1)
#define PON_PS_HOLD_RST_CTL 0x5a
#define PON_PS_HOLD_RST_CTL2 0x5b
@@ -38,10 +40,15 @@
#define PON_PULL_CTL 0x70
#define PON_KPDPWR_PULL_UP BIT(1)
+#define PON_RESIN_PULL_UP BIT(0)
#define PON_DBC_CTL 0x71
#define PON_DBC_DELAY_MASK 0x7
+struct pm8941_data {
+ unsigned int pull_up_bit;
+ unsigned int status_bit;
+};
struct pm8941_pwrkey {
struct device *dev;
@@ -52,6 +59,9 @@ struct pm8941_pwrkey {
unsigned int revision;
struct notifier_block reboot_notifier;
+
+ u32 code;
+ const struct pm8941_data *data;
};
static int pm8941_reboot_notify(struct notifier_block *nb,
@@ -124,7 +134,8 @@ static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data)
if (error)
return IRQ_HANDLED;
- input_report_key(pwrkey->input, KEY_POWER, !!(sts & PON_KPDPWR_N_SET));
+ input_report_key(pwrkey->input, pwrkey->code,
+ sts & pwrkey->data->status_bit);
input_sync(pwrkey->input);
return IRQ_HANDLED;
@@ -157,6 +168,7 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
{
struct pm8941_pwrkey *pwrkey;
bool pull_up;
+ struct device *parent;
u32 req_delay;
int error;
@@ -175,12 +187,30 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
return -ENOMEM;
pwrkey->dev = &pdev->dev;
+ pwrkey->data = of_device_get_match_data(&pdev->dev);
- pwrkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ parent = pdev->dev.parent;
+ pwrkey->regmap = dev_get_regmap(parent, NULL);
if (!pwrkey->regmap) {
- dev_err(&pdev->dev, "failed to locate regmap\n");
- return -ENODEV;
+ /*
+ * We failed to get regmap for parent. Let's see if we are
+ * a child of pon node and read regmap and reg from its
+ * parent.
+ */
+ pwrkey->regmap = dev_get_regmap(parent->parent, NULL);
+ if (!pwrkey->regmap) {
+ dev_err(&pdev->dev, "failed to locate regmap\n");
+ return -ENODEV;
+ }
+
+ error = of_property_read_u32(parent->of_node,
+ "reg", &pwrkey->baseaddr);
+ } else {
+ error = of_property_read_u32(pdev->dev.of_node, "reg",
+ &pwrkey->baseaddr);
}
+ if (error)
+ return error;
pwrkey->irq = platform_get_irq(pdev, 0);
if (pwrkey->irq < 0) {
@@ -188,11 +218,6 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
return pwrkey->irq;
}
- error = of_property_read_u32(pdev->dev.of_node, "reg",
- &pwrkey->baseaddr);
- if (error)
- return error;
-
error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2,
&pwrkey->revision);
if (error) {
@@ -200,13 +225,21 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
return error;
}
+ error = of_property_read_u32(pdev->dev.of_node, "linux,code",
+ &pwrkey->code);
+ if (error) {
+ dev_dbg(&pdev->dev,
+ "no linux,code assuming power (%d)\n", error);
+ pwrkey->code = KEY_POWER;
+ }
+
pwrkey->input = devm_input_allocate_device(&pdev->dev);
if (!pwrkey->input) {
dev_dbg(&pdev->dev, "unable to allocate input device\n");
return -ENOMEM;
}
- input_set_capability(pwrkey->input, EV_KEY, KEY_POWER);
+ input_set_capability(pwrkey->input, EV_KEY, pwrkey->code);
pwrkey->input->name = "pm8941_pwrkey";
pwrkey->input->phys = "pm8941_pwrkey/input0";
@@ -225,8 +258,8 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
error = regmap_update_bits(pwrkey->regmap,
pwrkey->baseaddr + PON_PULL_CTL,
- PON_KPDPWR_PULL_UP,
- pull_up ? PON_KPDPWR_PULL_UP : 0);
+ pwrkey->data->pull_up_bit,
+ pull_up ? pwrkey->data->pull_up_bit : 0);
if (error) {
dev_err(&pdev->dev, "failed to set pull: %d\n", error);
return error;
@@ -271,8 +304,19 @@ static int pm8941_pwrkey_remove(struct platform_device *pdev)
return 0;
}
+static const struct pm8941_data pwrkey_data = {
+ .pull_up_bit = PON_KPDPWR_PULL_UP,
+ .status_bit = PON_KPDPWR_N_SET,
+};
+
+static const struct pm8941_data resin_data = {
+ .pull_up_bit = PON_RESIN_PULL_UP,
+ .status_bit = PON_RESIN_N_SET,
+};
+
static const struct of_device_id pm8941_pwr_key_id_table[] = {
- { .compatible = "qcom,pm8941-pwrkey" },
+ { .compatible = "qcom,pm8941-pwrkey", .data = &pwrkey_data },
+ { .compatible = "qcom,pm8941-resin", .data = &resin_data },
{ }
};
MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table);