Hi Tirupathi,
+static irqreturn_t pm8941_resinkey_irq(int irq, void *_data)
+{
+ struct pm8941_pwrkey *pwrkey = _data;
+ unsigned int sts;
+ int error;
+ u32 key_code = pwrkey->resin_key_code;
+
+ error = regmap_read(pwrkey->regmap,
+ pwrkey->baseaddr + PON_RT_STS, &sts);
+ if (error)
+ return IRQ_HANDLED;
+
+ input_report_key(pwrkey->input, key_code, !!(sts & PON_RESIN_N_SET));
+ input_sync(pwrkey->input);
+
+ return IRQ_HANDLED;
+}
+
static int __maybe_unused pm8941_pwrkey_suspend(struct device *dev)
{
struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev);
@@ -153,9 +175,56 @@ static int __maybe_unused pm8941_pwrkey_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(pm8941_pwr_key_pm_ops,
pm8941_pwrkey_suspend, pm8941_pwrkey_resume);
+static int pm8941_resin_key_init(struct pm8941_pwrkey *pwrkey,
+ struct device_node *np)
+{
+ int error, irq;
+ bool pull_up;
+
+ /*
+ * Get the standard-key parameters. This might not be
+ * specified if there is no key mapping on the reset line.
+ */
+ error = of_property_read_u32(np, "linux,code", &pwrkey->resin_key_code);
+ if (error) {
+ dev_err(pwrkey->dev, "failed to read key-code for resin key\n");
+ return error;
+ }
+
+ pull_up = of_property_read_bool(np, "bias-pull-up");
+
+ irq = irq_of_parse_and_map(np, 0);
+ if (irq < 0) {
+ dev_err(pwrkey->dev, "failed to get resin irq\n");
+ return -EINVAL;
+ }
+
+ /* Register key configuration */
+ input_set_capability(pwrkey->input, EV_KEY, pwrkey->resin_key_code);
+
+ error = regmap_update_bits(pwrkey->regmap,
+ pwrkey->baseaddr + PON_PULL_CTL,
+ PON_RESIN_PULL_UP,
+ pull_up ? PON_RESIN_PULL_UP : 0);
+ if (error) {
+ dev_err(pwrkey->dev, "failed to set resin pull: %d\n", error);
+ return error;
+ }
+
+ error = devm_request_threaded_irq(pwrkey->dev, irq, NULL,
+ pm8941_resinkey_irq, IRQF_ONESHOT,
+ "pm8941_resinkey", pwrkey);
+ if (error)
+ dev_err(pwrkey->dev, "failed requesting resin key IRQ: %d\n",
+ error);
+
+ return error;
+}
+
static int pm8941_pwrkey_probe(struct platform_device *pdev)
{
struct pm8941_pwrkey *pwrkey;
+ struct device_node *np = NULL;
bool pull_up;
u32 req_delay;
int error;
@@ -241,6 +310,18 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
return error;
}
+ np = of_find_node_by_name(pdev->dev.of_node, "resin");
+ if (np) {
+ /* resin key capabilities are defined in device node */
+ error = pm8941_resin_key_init(pwrkey, np);
What happens if interrupts comes as soon as you have done the
key_init(..) here? I see that you are registering the input device after
it, right? Looks like you should do this at the end of probe?
+ of_node_put(np);
+ if (error) {
+ dev_err(&pdev->dev, "failed resin key initialization: %d\n",
+ error);
+ return error;
+ }
+ }
+
error = input_register_device(pwrkey->input);
if (error) {
dev_err(&pdev->dev, "failed to register input device: %d\n",
--
---Trilok Soni
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a
Linux Foundation Collaborative Project
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