Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 185 insertions, 0 deletions

diff --git a/drivers/input/keyboard/clps711x-keypad.c b/drivers/input/keyboard/clps711x-keypad.c
new file mode 100644
index 0000000000..4c1a3e611e
--- /dev/null
+++ b/drivers/input/keyboard/clps711x-keypad.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Cirrus Logic CLPS711X Keypad driver
+ *
+ * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru>
+ */
+
+#include <linux/input.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/gpio/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/sched.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/clps711x.h>
+
+#define CLPS711X_KEYPAD_COL_COUNT	8
+
+struct clps711x_gpio_data {
+	struct gpio_desc *desc;
+	DECLARE_BITMAP(last_state, CLPS711X_KEYPAD_COL_COUNT);
+};
+
+struct clps711x_keypad_data {
+	struct regmap			*syscon;
+	int				row_count;
+	unsigned int			row_shift;
+	struct clps711x_gpio_data	*gpio_data;
+};
+
+static void clps711x_keypad_poll(struct input_dev *input)
+{
+	const unsigned short *keycodes = input->keycode;
+	struct clps711x_keypad_data *priv = input_get_drvdata(input);
+	bool sync = false;
+	int col, row;
+
+	for (col = 0; col < CLPS711X_KEYPAD_COL_COUNT; col++) {
+		/* Assert column */
+		regmap_update_bits(priv->syscon, SYSCON_OFFSET,
+				   SYSCON1_KBDSCAN_MASK,
+				   SYSCON1_KBDSCAN(8 + col));
+
+		/* Scan rows */
+		for (row = 0; row < priv->row_count; row++) {
+			struct clps711x_gpio_data *data = &priv->gpio_data[row];
+			bool state, state1;
+
+			/* Read twice for protection against fluctuations */
+			do {
+				state = gpiod_get_value_cansleep(data->desc);
+				cond_resched();
+				state1 = gpiod_get_value_cansleep(data->desc);
+			} while (state != state1);
+
+			if (test_bit(col, data->last_state) != state) {
+				int code = MATRIX_SCAN_CODE(row, col,
+							    priv->row_shift);
+
+				if (state) {
+					set_bit(col, data->last_state);
+					input_event(input,
+						    EV_MSC, MSC_SCAN, code);
+				} else {
+					clear_bit(col, data->last_state);
+				}
+
+				if (keycodes[code])
+					input_report_key(input,
+							 keycodes[code], state);
+				sync = true;
+			}
+		}
+
+		/* Set all columns to low */
+		regmap_update_bits(priv->syscon, SYSCON_OFFSET,
+				   SYSCON1_KBDSCAN_MASK, SYSCON1_KBDSCAN(1));
+	}
+
+	if (sync)
+		input_sync(input);
+}
+
+static int clps711x_keypad_probe(struct platform_device *pdev)
+{
+	struct clps711x_keypad_data *priv;
+	struct device *dev = &pdev->dev;
+	struct input_dev *input;
+	u32 poll_interval;
+	int i, err;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+	if (IS_ERR(priv->syscon))
+		return PTR_ERR(priv->syscon);
+
+	priv->row_count = gpiod_count(dev, "row");
+	if (priv->row_count < 1)
+		return -EINVAL;
+
+	priv->gpio_data = devm_kcalloc(dev,
+				priv->row_count, sizeof(*priv->gpio_data),
+				GFP_KERNEL);
+	if (!priv->gpio_data)
+		return -ENOMEM;
+
+	priv->row_shift = get_count_order(CLPS711X_KEYPAD_COL_COUNT);
+
+	for (i = 0; i < priv->row_count; i++) {
+		struct clps711x_gpio_data *data = &priv->gpio_data[i];
+
+		data->desc = devm_gpiod_get_index(dev, "row", i, GPIOD_IN);
+		if (IS_ERR(data->desc))
+			return PTR_ERR(data->desc);
+	}
+
+	err = device_property_read_u32(dev, "poll-interval", &poll_interval);
+	if (err)
+		return err;
+
+	input = devm_input_allocate_device(dev);
+	if (!input)
+		return -ENOMEM;
+
+	input_set_drvdata(input, priv);
+
+	input->name		= pdev->name;
+	input->dev.parent	= dev;
+	input->id.bustype	= BUS_HOST;
+	input->id.vendor	= 0x0001;
+	input->id.product	= 0x0001;
+	input->id.version	= 0x0100;
+
+	err = matrix_keypad_build_keymap(NULL, NULL, priv->row_count,
+					 CLPS711X_KEYPAD_COL_COUNT,
+					 NULL, input);
+	if (err)
+		return err;
+
+	input_set_capability(input, EV_MSC, MSC_SCAN);
+	if (device_property_read_bool(dev, "autorepeat"))
+		__set_bit(EV_REP, input->evbit);
+
+	/* Set all columns to low */
+	regmap_update_bits(priv->syscon, SYSCON_OFFSET, SYSCON1_KBDSCAN_MASK,
+			   SYSCON1_KBDSCAN(1));
+
+
+	err = input_setup_polling(input, clps711x_keypad_poll);
+	if (err)
+		return err;
+
+	input_set_poll_interval(input, poll_interval);
+
+	err = input_register_device(input);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static const struct of_device_id clps711x_keypad_of_match[] = {
+	{ .compatible = "cirrus,ep7209-keypad", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, clps711x_keypad_of_match);
+
+static struct platform_driver clps711x_keypad_driver = {
+	.driver	= {
+		.name		= "clps711x-keypad",
+		.of_match_table	= clps711x_keypad_of_match,
+	},
+	.probe	= clps711x_keypad_probe,
+};
+module_platform_driver(clps711x_keypad_driver);
+
+MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
+MODULE_DESCRIPTION("Cirrus Logic CLPS711X Keypad driver");
+MODULE_LICENSE("GPL");