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authorDaniel Golle <daniel@makrotopia.org>2021-12-21 16:27:16 +0000
committerDaniel Golle <daniel@makrotopia.org>2021-12-21 16:41:10 +0000
commitf0c0b18234418c6ed6d35fcf1c6e5b0cbdceed49 (patch)
tree7c91e2c8fb138eb464d1a1efbf9200ed4cf700f4 /target/linux/mvebu/patches-5.10/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch
parentc46202fb34bbf6d1e159c1a1bbdec8a9ec726285 (diff)
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mvebu: puzzle-m902: add driver for MCU driving LEDs, fan and buzzer
Backport MFD driver for communicating with the on-board MCU found on IEI World Puzzle appliances. Improve the driver to support multiple LEDs, apply a default state and let MCU take care of blinking if timing is within supported range. Wire up LEDs and fan for Puzzle M902 in device tree. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Diffstat (limited to 'target/linux/mvebu/patches-5.10/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch')
-rw-r--r--target/linux/mvebu/patches-5.10/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch207
1 files changed, 207 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-5.10/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch b/target/linux/mvebu/patches-5.10/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch
new file mode 100644
index 0000000000..37f98b6ba8
--- /dev/null
+++ b/target/linux/mvebu/patches-5.10/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch
@@ -0,0 +1,207 @@
+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
+@@ -333,6 +333,14 @@ 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
+@@ -35,6 +35,7 @@ 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_KTD2692) += leds-ktd2692.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");