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05cd4a59f0
Linux 5.15 on Marvell EBU, here we go! Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
208 lines
6.5 KiB
Diff
208 lines
6.5 KiB
Diff
From f3b44eb69cc561cf05d00506dcec0dd9be003ed8 Mon Sep 17 00:00:00 2001
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From: Luka Kovacic <luka.kovacic () sartura ! hr>
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Date: Tue, 24 Aug 2021 12:44:35 +0000
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Subject: [PATCH 4/7] drivers: leds: Add the IEI WT61P803 PUZZLE LED driver
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Add support for the IEI WT61P803 PUZZLE LED driver.
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Currently only the front panel power LED is supported,
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since it is the only LED on this board wired through the
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MCU.
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The LED is wired directly to the on-board MCU controller
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and is toggled using an MCU command.
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Support for more LEDs is going to be added in case more
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boards implement this microcontroller, as LEDs use many
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different GPIOs.
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This driver depends on the IEI WT61P803 PUZZLE MFD driver.
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Signed-off-by: Luka Kovacic <luka.kovacic@sartura.hr>
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Signed-off-by: Pavo Banicevic <pavo.banicevic@sartura.hr>
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Cc: Luka Perkov <luka.perkov@sartura.hr>
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Cc: Robert Marko <robert.marko@sartura.hr>
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---
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drivers/leds/Kconfig | 8 ++
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drivers/leds/Makefile | 1 +
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drivers/leds/leds-iei-wt61p803-puzzle.c | 147 ++++++++++++++++++++++++
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3 files changed, 156 insertions(+)
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create mode 100644 drivers/leds/leds-iei-wt61p803-puzzle.c
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--- a/drivers/leds/Kconfig
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+++ b/drivers/leds/Kconfig
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@@ -333,6 +333,14 @@ config LEDS_IPAQ_MICRO
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Choose this option if you want to use the notification LED on
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Compaq/HP iPAQ h3100 and h3600.
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+config LEDS_IEI_WT61P803_PUZZLE
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+ tristate "LED Support for the IEI WT61P803 PUZZLE MCU"
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+ depends on LEDS_CLASS
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+ depends on MFD_IEI_WT61P803_PUZZLE
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+ help
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+ This option enables support for LEDs controlled by the IEI WT61P803
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+ M801 MCU.
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+
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config LEDS_HP6XX
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tristate "LED Support for the HP Jornada 6xx"
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depends on LEDS_CLASS
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--- a/drivers/leds/Makefile
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+++ b/drivers/leds/Makefile
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@@ -35,6 +35,7 @@ obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.
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obj-$(CONFIG_LEDS_INTEL_SS4200) += leds-ss4200.o
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obj-$(CONFIG_LEDS_IP30) += leds-ip30.o
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obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
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+obj-$(CONFIG_LEDS_IEI_WT61P803_PUZZLE) += leds-iei-wt61p803-puzzle.o
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obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o
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obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o
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obj-$(CONFIG_LEDS_KTD2692) += leds-ktd2692.o
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--- /dev/null
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+++ b/drivers/leds/leds-iei-wt61p803-puzzle.c
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@@ -0,0 +1,147 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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+/* IEI WT61P803 PUZZLE MCU LED Driver
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+ *
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+ * Copyright (C) 2020 Sartura Ltd.
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+ * Author: Luka Kovacic <luka.kovacic@sartura.hr>
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+ */
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+
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+#include <linux/leds.h>
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+#include <linux/mfd/iei-wt61p803-puzzle.h>
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+#include <linux/mod_devicetable.h>
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+#include <linux/module.h>
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+#include <linux/platform_device.h>
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+#include <linux/property.h>
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+#include <linux/slab.h>
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+
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+enum iei_wt61p803_puzzle_led_state {
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+ IEI_LED_OFF = 0x30,
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+ IEI_LED_ON = 0x31,
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+ IEI_LED_BLINK_5HZ = 0x32,
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+ IEI_LED_BLINK_1HZ = 0x33,
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+};
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+
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+/**
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+ * struct iei_wt61p803_puzzle_led - MCU LED Driver
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+ * @cdev: LED classdev
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+ * @mcu: MCU struct pointer
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+ * @response_buffer Global MCU response buffer
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+ * @lock: General mutex lock to protect simultaneous R/W access to led_power_state
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+ * @led_power_state: State of the front panel power LED
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+ */
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+struct iei_wt61p803_puzzle_led {
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+ struct led_classdev cdev;
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+ struct iei_wt61p803_puzzle *mcu;
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+ unsigned char response_buffer[IEI_WT61P803_PUZZLE_BUF_SIZE];
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+ struct mutex lock; /* mutex to protect led_power_state */
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+ int led_power_state;
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+};
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+
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+static inline struct iei_wt61p803_puzzle_led *cdev_to_iei_wt61p803_puzzle_led
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+ (struct led_classdev *led_cdev)
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+{
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+ return container_of(led_cdev, struct iei_wt61p803_puzzle_led, cdev);
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+}
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+
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+static int iei_wt61p803_puzzle_led_brightness_set_blocking(struct led_classdev *cdev,
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+ enum led_brightness brightness)
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+{
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+ struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
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+ unsigned char *resp_buf = priv->response_buffer;
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+ unsigned char led_power_cmd[5] = {};
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+ size_t reply_size;
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+ int ret;
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+
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+ led_power_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
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+ led_power_cmd[1] = IEI_WT61P803_PUZZLE_CMD_LED;
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+ led_power_cmd[2] = IEI_WT61P803_PUZZLE_CMD_LED_POWER;
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+ led_power_cmd[3] = brightness == LED_OFF ? IEI_LED_OFF : IEI_LED_ON;
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+
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+ ret = iei_wt61p803_puzzle_write_command(priv->mcu, led_power_cmd,
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+ sizeof(led_power_cmd),
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+ resp_buf,
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+ &reply_size);
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+ if (ret)
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+ return ret;
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+
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+ if (reply_size != 3)
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+ return -EIO;
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+
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+ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
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+ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
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+ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK))
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+ return -EIO;
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+
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+ mutex_lock(&priv->lock);
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+ priv->led_power_state = brightness;
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+ mutex_unlock(&priv->lock);
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+
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+ return 0;
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+}
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+
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+static enum led_brightness iei_wt61p803_puzzle_led_brightness_get(struct led_classdev *cdev)
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+{
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+ struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
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+ int led_state;
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+
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+ mutex_lock(&priv->lock);
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+ led_state = priv->led_power_state;
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+ mutex_unlock(&priv->lock);
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+
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+ return led_state;
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+}
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+
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+static int iei_wt61p803_puzzle_led_probe(struct platform_device *pdev)
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+{
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+ struct device *dev = &pdev->dev;
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+ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev->parent);
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+ struct iei_wt61p803_puzzle_led *priv;
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+ struct led_init_data init_data = {};
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+ struct fwnode_handle *child;
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+ int ret;
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+
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+ if (device_get_child_node_count(dev) != 1)
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+ return -EINVAL;
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+
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+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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+ if (!priv)
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+ return -ENOMEM;
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+
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+ priv->mcu = mcu;
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+ priv->led_power_state = 1;
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+ mutex_init(&priv->lock);
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+ dev_set_drvdata(dev, priv);
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+
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+ child = device_get_next_child_node(dev, NULL);
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+ init_data.fwnode = child;
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+
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+ priv->cdev.brightness_set_blocking = iei_wt61p803_puzzle_led_brightness_set_blocking;
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+ priv->cdev.brightness_get = iei_wt61p803_puzzle_led_brightness_get;
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+ priv->cdev.max_brightness = 1;
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+
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+ ret = devm_led_classdev_register_ext(dev, &priv->cdev, &init_data);
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+ if (ret)
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+ dev_err(dev, "Could not register LED\n");
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+
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+ fwnode_handle_put(child);
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+ return ret;
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+}
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+
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+static const struct of_device_id iei_wt61p803_puzzle_led_of_match[] = {
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+ { .compatible = "iei,wt61p803-puzzle-leds" },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(of, iei_wt61p803_puzzle_led_of_match);
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+
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+static struct platform_driver iei_wt61p803_puzzle_led_driver = {
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+ .driver = {
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+ .name = "iei-wt61p803-puzzle-led",
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+ .of_match_table = iei_wt61p803_puzzle_led_of_match,
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+ },
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+ .probe = iei_wt61p803_puzzle_led_probe,
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+};
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+module_platform_driver(iei_wt61p803_puzzle_led_driver);
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+
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+MODULE_DESCRIPTION("IEI WT61P803 PUZZLE front panel LED driver");
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+MODULE_AUTHOR("Luka Kovacic <luka.kovacic@sartura.hr>");
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+MODULE_LICENSE("GPL v2");
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+MODULE_ALIAS("platform:leds-iei-wt61p803-puzzle");
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