Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 207 insertions, 0 deletions

diff --git a/drivers/input/misc/sirfsoc-onkey.c b/drivers/input/misc/sirfsoc-onkey.c
new file mode 100644
index 000000000..60e1f31ee
--- /dev/null
+++ b/drivers/input/misc/sirfsoc-onkey.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Power key driver for SiRF PrimaII
+ *
+ * Copyright (c) 2013 - 2014 Cambridge Silicon Radio Limited, a CSR plc group
+ * company.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/rtc/sirfsoc_rtciobrg.h>
+#include <linux/of.h>
+#include <linux/workqueue.h>
+
+struct sirfsoc_pwrc_drvdata {
+	u32			pwrc_base;
+	struct input_dev	*input;
+	struct delayed_work	work;
+};
+
+#define PWRC_ON_KEY_BIT			(1 << 0)
+
+#define PWRC_INT_STATUS			0xc
+#define PWRC_INT_MASK			0x10
+#define PWRC_PIN_STATUS			0x14
+#define PWRC_KEY_DETECT_UP_TIME		20	/* ms*/
+
+static int sirfsoc_pwrc_is_on_key_down(struct sirfsoc_pwrc_drvdata *pwrcdrv)
+{
+	u32 state = sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base +
+							PWRC_PIN_STATUS);
+	return !(state & PWRC_ON_KEY_BIT); /* ON_KEY is active low */
+}
+
+static void sirfsoc_pwrc_report_event(struct work_struct *work)
+{
+	struct sirfsoc_pwrc_drvdata *pwrcdrv =
+		container_of(work, struct sirfsoc_pwrc_drvdata, work.work);
+
+	if (sirfsoc_pwrc_is_on_key_down(pwrcdrv)) {
+		schedule_delayed_work(&pwrcdrv->work,
+			msecs_to_jiffies(PWRC_KEY_DETECT_UP_TIME));
+	} else {
+		input_event(pwrcdrv->input, EV_KEY, KEY_POWER, 0);
+		input_sync(pwrcdrv->input);
+	}
+}
+
+static irqreturn_t sirfsoc_pwrc_isr(int irq, void *dev_id)
+{
+	struct sirfsoc_pwrc_drvdata *pwrcdrv = dev_id;
+	u32 int_status;
+
+	int_status = sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base +
+							PWRC_INT_STATUS);
+	sirfsoc_rtc_iobrg_writel(int_status & ~PWRC_ON_KEY_BIT,
+				 pwrcdrv->pwrc_base + PWRC_INT_STATUS);
+
+	input_event(pwrcdrv->input, EV_KEY, KEY_POWER, 1);
+	input_sync(pwrcdrv->input);
+	schedule_delayed_work(&pwrcdrv->work,
+			      msecs_to_jiffies(PWRC_KEY_DETECT_UP_TIME));
+
+	return IRQ_HANDLED;
+}
+
+static void sirfsoc_pwrc_toggle_interrupts(struct sirfsoc_pwrc_drvdata *pwrcdrv,
+					   bool enable)
+{
+	u32 int_mask;
+
+	int_mask = sirfsoc_rtc_iobrg_readl(pwrcdrv->pwrc_base + PWRC_INT_MASK);
+	if (enable)
+		int_mask |= PWRC_ON_KEY_BIT;
+	else
+		int_mask &= ~PWRC_ON_KEY_BIT;
+	sirfsoc_rtc_iobrg_writel(int_mask, pwrcdrv->pwrc_base + PWRC_INT_MASK);
+}
+
+static int sirfsoc_pwrc_open(struct input_dev *input)
+{
+	struct sirfsoc_pwrc_drvdata *pwrcdrv = input_get_drvdata(input);
+
+	sirfsoc_pwrc_toggle_interrupts(pwrcdrv, true);
+
+	return 0;
+}
+
+static void sirfsoc_pwrc_close(struct input_dev *input)
+{
+	struct sirfsoc_pwrc_drvdata *pwrcdrv = input_get_drvdata(input);
+
+	sirfsoc_pwrc_toggle_interrupts(pwrcdrv, false);
+	cancel_delayed_work_sync(&pwrcdrv->work);
+}
+
+static const struct of_device_id sirfsoc_pwrc_of_match[] = {
+	{ .compatible = "sirf,prima2-pwrc" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, sirfsoc_pwrc_of_match);
+
+static int sirfsoc_pwrc_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct sirfsoc_pwrc_drvdata *pwrcdrv;
+	int irq;
+	int error;
+
+	pwrcdrv = devm_kzalloc(&pdev->dev, sizeof(struct sirfsoc_pwrc_drvdata),
+			       GFP_KERNEL);
+	if (!pwrcdrv) {
+		dev_info(&pdev->dev, "Not enough memory for the device data\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * We can't use of_iomap because pwrc is not mapped in memory,
+	 * the so-called base address is only offset in rtciobrg
+	 */
+	error = of_property_read_u32(np, "reg", &pwrcdrv->pwrc_base);
+	if (error) {
+		dev_err(&pdev->dev,
+			"unable to find base address of pwrc node in dtb\n");
+		return error;
+	}
+
+	pwrcdrv->input = devm_input_allocate_device(&pdev->dev);
+	if (!pwrcdrv->input)
+		return -ENOMEM;
+
+	pwrcdrv->input->name = "sirfsoc pwrckey";
+	pwrcdrv->input->phys = "pwrc/input0";
+	pwrcdrv->input->evbit[0] = BIT_MASK(EV_KEY);
+	input_set_capability(pwrcdrv->input, EV_KEY, KEY_POWER);
+
+	INIT_DELAYED_WORK(&pwrcdrv->work, sirfsoc_pwrc_report_event);
+
+	pwrcdrv->input->open = sirfsoc_pwrc_open;
+	pwrcdrv->input->close = sirfsoc_pwrc_close;
+
+	input_set_drvdata(pwrcdrv->input, pwrcdrv);
+
+	/* Make sure the device is quiesced */
+	sirfsoc_pwrc_toggle_interrupts(pwrcdrv, false);
+
+	irq = platform_get_irq(pdev, 0);
+	error = devm_request_irq(&pdev->dev, irq,
+				 sirfsoc_pwrc_isr, 0,
+				 "sirfsoc_pwrc_int", pwrcdrv);
+	if (error) {
+		dev_err(&pdev->dev, "unable to claim irq %d, error: %d\n",
+			irq, error);
+		return error;
+	}
+
+	error = input_register_device(pwrcdrv->input);
+	if (error) {
+		dev_err(&pdev->dev,
+			"unable to register input device, error: %d\n",
+			error);
+		return error;
+	}
+
+	dev_set_drvdata(&pdev->dev, pwrcdrv);
+	device_init_wakeup(&pdev->dev, 1);
+
+	return 0;
+}
+
+static int __maybe_unused sirfsoc_pwrc_resume(struct device *dev)
+{
+	struct sirfsoc_pwrc_drvdata *pwrcdrv = dev_get_drvdata(dev);
+	struct input_dev *input = pwrcdrv->input;
+
+	/*
+	 * Do not mask pwrc interrupt as we want pwrc work as a wakeup source
+	 * if users touch X_ONKEY_B, see arch/arm/mach-prima2/pm.c
+	 */
+	mutex_lock(&input->mutex);
+	if (input->users)
+		sirfsoc_pwrc_toggle_interrupts(pwrcdrv, true);
+	mutex_unlock(&input->mutex);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(sirfsoc_pwrc_pm_ops, NULL, sirfsoc_pwrc_resume);
+
+static struct platform_driver sirfsoc_pwrc_driver = {
+	.probe		= sirfsoc_pwrc_probe,
+	.driver		= {
+		.name	= "sirfsoc-pwrc",
+		.pm	= &sirfsoc_pwrc_pm_ops,
+		.of_match_table = sirfsoc_pwrc_of_match,
+	}
+};
+
+module_platform_driver(sirfsoc_pwrc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Binghua Duan <Binghua.Duan@csr.com>, Xianglong Du <Xianglong.Du@csr.com>");
+MODULE_DESCRIPTION("CSR Prima2 PWRC Driver");
+MODULE_ALIAS("platform:sirfsoc-pwrc");