+++ /dev/null
-From f3b44eb69cc561cf05d00506dcec0dd9be003ed8 Mon Sep 17 00:00:00 2001
-From: Luka Kovacic <luka.kovacic () sartura ! hr>
-Date: Tue, 24 Aug 2021 12:44:35 +0000
-Subject: [PATCH 4/7] drivers: leds: Add the IEI WT61P803 PUZZLE LED driver
-
-Add support for the IEI WT61P803 PUZZLE LED driver.
-Currently only the front panel power LED is supported,
-since it is the only LED on this board wired through the
-MCU.
-
-The LED is wired directly to the on-board MCU controller
-and is toggled using an MCU command.
-
-Support for more LEDs is going to be added in case more
-boards implement this microcontroller, as LEDs use many
-different GPIOs.
-
-This driver depends on the IEI WT61P803 PUZZLE MFD driver.
-
-Signed-off-by: Luka Kovacic <luka.kovacic@sartura.hr>
-Signed-off-by: Pavo Banicevic <pavo.banicevic@sartura.hr>
-Cc: Luka Perkov <luka.perkov@sartura.hr>
-Cc: Robert Marko <robert.marko@sartura.hr>
----
- drivers/leds/Kconfig | 8 ++
- drivers/leds/Makefile | 1 +
- drivers/leds/leds-iei-wt61p803-puzzle.c | 147 ++++++++++++++++++++++++
- 3 files changed, 156 insertions(+)
- create mode 100644 drivers/leds/leds-iei-wt61p803-puzzle.c
-
---- a/drivers/leds/Kconfig
-+++ b/drivers/leds/Kconfig
-@@ -300,6 +300,14 @@ config LEDS_IPAQ_MICRO
- Choose this option if you want to use the notification LED on
- Compaq/HP iPAQ h3100 and h3600.
-
-+config LEDS_IEI_WT61P803_PUZZLE
-+ tristate "LED Support for the IEI WT61P803 PUZZLE MCU"
-+ depends on LEDS_CLASS
-+ depends on MFD_IEI_WT61P803_PUZZLE
-+ help
-+ This option enables support for LEDs controlled by the IEI WT61P803
-+ M801 MCU.
-+
- config LEDS_HP6XX
- tristate "LED Support for the HP Jornada 6xx"
- depends on LEDS_CLASS
---- a/drivers/leds/Makefile
-+++ b/drivers/leds/Makefile
-@@ -32,6 +32,7 @@ obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.
- obj-$(CONFIG_LEDS_INTEL_SS4200) += leds-ss4200.o
- obj-$(CONFIG_LEDS_IP30) += leds-ip30.o
- obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
-+obj-$(CONFIG_LEDS_IEI_WT61P803_PUZZLE) += leds-iei-wt61p803-puzzle.o
- obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o
- obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o
- obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o
---- /dev/null
-+++ b/drivers/leds/leds-iei-wt61p803-puzzle.c
-@@ -0,0 +1,147 @@
-+// SPDX-License-Identifier: GPL-2.0-only
-+/* IEI WT61P803 PUZZLE MCU LED Driver
-+ *
-+ * Copyright (C) 2020 Sartura Ltd.
-+ * Author: Luka Kovacic <luka.kovacic@sartura.hr>
-+ */
-+
-+#include <linux/leds.h>
-+#include <linux/mfd/iei-wt61p803-puzzle.h>
-+#include <linux/mod_devicetable.h>
-+#include <linux/module.h>
-+#include <linux/platform_device.h>
-+#include <linux/property.h>
-+#include <linux/slab.h>
-+
-+enum iei_wt61p803_puzzle_led_state {
-+ IEI_LED_OFF = 0x30,
-+ IEI_LED_ON = 0x31,
-+ IEI_LED_BLINK_5HZ = 0x32,
-+ IEI_LED_BLINK_1HZ = 0x33,
-+};
-+
-+/**
-+ * struct iei_wt61p803_puzzle_led - MCU LED Driver
-+ * @cdev: LED classdev
-+ * @mcu: MCU struct pointer
-+ * @response_buffer Global MCU response buffer
-+ * @lock: General mutex lock to protect simultaneous R/W access to led_power_state
-+ * @led_power_state: State of the front panel power LED
-+ */
-+struct iei_wt61p803_puzzle_led {
-+ struct led_classdev cdev;
-+ struct iei_wt61p803_puzzle *mcu;
-+ unsigned char response_buffer[IEI_WT61P803_PUZZLE_BUF_SIZE];
-+ struct mutex lock; /* mutex to protect led_power_state */
-+ int led_power_state;
-+};
-+
-+static inline struct iei_wt61p803_puzzle_led *cdev_to_iei_wt61p803_puzzle_led
-+ (struct led_classdev *led_cdev)
-+{
-+ return container_of(led_cdev, struct iei_wt61p803_puzzle_led, cdev);
-+}
-+
-+static int iei_wt61p803_puzzle_led_brightness_set_blocking(struct led_classdev *cdev,
-+ enum led_brightness brightness)
-+{
-+ struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
-+ unsigned char *resp_buf = priv->response_buffer;
-+ unsigned char led_power_cmd[5] = {};
-+ size_t reply_size;
-+ int ret;
-+
-+ led_power_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
-+ led_power_cmd[1] = IEI_WT61P803_PUZZLE_CMD_LED;
-+ led_power_cmd[2] = IEI_WT61P803_PUZZLE_CMD_LED_POWER;
-+ led_power_cmd[3] = brightness == LED_OFF ? IEI_LED_OFF : IEI_LED_ON;
-+
-+ ret = iei_wt61p803_puzzle_write_command(priv->mcu, led_power_cmd,
-+ sizeof(led_power_cmd),
-+ resp_buf,
-+ &reply_size);
-+ if (ret)
-+ return ret;
-+
-+ if (reply_size != 3)
-+ return -EIO;
-+
-+ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
-+ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
-+ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK))
-+ return -EIO;
-+
-+ mutex_lock(&priv->lock);
-+ priv->led_power_state = brightness;
-+ mutex_unlock(&priv->lock);
-+
-+ return 0;
-+}
-+
-+static enum led_brightness iei_wt61p803_puzzle_led_brightness_get(struct led_classdev *cdev)
-+{
-+ struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
-+ int led_state;
-+
-+ mutex_lock(&priv->lock);
-+ led_state = priv->led_power_state;
-+ mutex_unlock(&priv->lock);
-+
-+ return led_state;
-+}
-+
-+static int iei_wt61p803_puzzle_led_probe(struct platform_device *pdev)
-+{
-+ struct device *dev = &pdev->dev;
-+ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev->parent);
-+ struct iei_wt61p803_puzzle_led *priv;
-+ struct led_init_data init_data = {};
-+ struct fwnode_handle *child;
-+ int ret;
-+
-+ if (device_get_child_node_count(dev) != 1)
-+ return -EINVAL;
-+
-+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
-+ if (!priv)
-+ return -ENOMEM;
-+
-+ priv->mcu = mcu;
-+ priv->led_power_state = 1;
-+ mutex_init(&priv->lock);
-+ dev_set_drvdata(dev, priv);
-+
-+ child = device_get_next_child_node(dev, NULL);
-+ init_data.fwnode = child;
-+
-+ priv->cdev.brightness_set_blocking = iei_wt61p803_puzzle_led_brightness_set_blocking;
-+ priv->cdev.brightness_get = iei_wt61p803_puzzle_led_brightness_get;
-+ priv->cdev.max_brightness = 1;
-+
-+ ret = devm_led_classdev_register_ext(dev, &priv->cdev, &init_data);
-+ if (ret)
-+ dev_err(dev, "Could not register LED\n");
-+
-+ fwnode_handle_put(child);
-+ return ret;
-+}
-+
-+static const struct of_device_id iei_wt61p803_puzzle_led_of_match[] = {
-+ { .compatible = "iei,wt61p803-puzzle-leds" },
-+ { }
-+};
-+MODULE_DEVICE_TABLE(of, iei_wt61p803_puzzle_led_of_match);
-+
-+static struct platform_driver iei_wt61p803_puzzle_led_driver = {
-+ .driver = {
-+ .name = "iei-wt61p803-puzzle-led",
-+ .of_match_table = iei_wt61p803_puzzle_led_of_match,
-+ },
-+ .probe = iei_wt61p803_puzzle_led_probe,
-+};
-+module_platform_driver(iei_wt61p803_puzzle_led_driver);
-+
-+MODULE_DESCRIPTION("IEI WT61P803 PUZZLE front panel LED driver");
-+MODULE_AUTHOR("Luka Kovacic <luka.kovacic@sartura.hr>");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS("platform:leds-iei-wt61p803-puzzle");
projects / openwrt / staging / pepe2k.git / blobdiff