ioc: Add reset GPIO
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101117d0bc
@ -1,18 +1,41 @@
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diff --git a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
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index 5aff8ecc66cb..c8201e79dff3 100644
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index c8201e79dff3..5407742acad6 100644
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--- a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
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+++ b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
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@@ -211,9 +211,12 @@
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@@ -210,12 +210,22 @@ &uart0 {
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status = "okay";
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};
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+&pio {
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+ lw35ioc_pins: lw35ioc-pins {
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+ pins = "PA10";
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+ function = "gpio_out";
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+ };
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+};
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+
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&uart1 {
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+ status = "okay";
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&uart1_pins>;
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- status = "disabled";
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+ lw35ioc@0 {
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+ compatible = "brother,lw35";
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+ };
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lw35ioc@0 {
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compatible = "brother,lw35";
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&lw35ioc_pins>;
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+ rst-gpios = <&pio 0 10 GPIO_ACTIVE_LOW>;
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};
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};
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&uart2 {
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@@ -242,3 +252,13 @@ &usbphy {
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/* VBUS on USB host ports are always on */
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status = "okay";
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};
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+
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+&spi0 {
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+ status = "okay";
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+ lmg6202ulyt@0 {
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+ compatible = "hitachi,lmg6202ulyt";
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+ reg = <0x0>;
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+ spi-max-frequency = <2000000>;
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+ cs-gpios = <0>, <&pio 0 3 GPIO_ACTIVE_LOW>;
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+ };
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+};
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@ -7,6 +7,7 @@
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#include <linux/serdev.h>
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#include <linux/types.h>
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#include <linux/input.h>
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#include <linux/gpio/consumer.h>
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// #define ENABLE_DEBUG ENABLE_DEBUG
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@ -43,20 +44,25 @@ static int keycode_map[] = {
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KEY_SYSRQ
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};
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enum lw35ioc_state {SYNC, TYPE, KEYBOARD, PRINTER};
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enum lw35ioc_state {PASSIVE, PASSTHROUGH, ACTIVE};
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enum lw35ioc_packet_state {SYNC, TYPE, KEYBOARD, PRINTER};
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struct lw35ioc_packet {
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enum lw35ioc_state state;
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enum lw35ioc_packet_state state;
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};
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struct lw35ioc_priv {
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struct serdev_device *serdev;
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struct input_dev *input_dev;
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struct gpio_desc *gpio_rst; /* GPIO to reset both AVRs */
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enum lw35ioc_state state;
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struct lw35ioc_packet packet;
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};
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static int lw35ioc_receive_buf(struct serdev_device *serdev,
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static int lw35ioc_process_buf(struct serdev_device *serdev,
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const unsigned char *data,
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size_t count)
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{
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@ -107,6 +113,17 @@ static int lw35ioc_receive_buf(struct serdev_device *serdev,
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return i;
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}
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static int lw35ioc_receive_buf(struct serdev_device *serdev,
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const unsigned char *data,
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size_t count)
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{
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struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
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if (priv->state == ACTIVE)
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return lw35ioc_process_buf(serdev, data, count);
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return count; /* Pretend we read all data */
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}
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static void lw35ioc_write_wakeup(struct serdev_device *serdev)
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{
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dev_info(&serdev->dev, "Write wakeup\n");
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@ -118,6 +135,14 @@ static struct serdev_device_ops lw35ioc_serdev_ops = {
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.write_wakeup = lw35ioc_write_wakeup,
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};
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static void lw35ioc_set_hw_reset(struct serdev_device *serdev,
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int reset_active)
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{
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struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
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gpiod_set_value(priv->gpio_rst, !reset_active);
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}
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static int lw35ioc_probe(struct serdev_device *serdev)
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{
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struct lw35ioc_priv *priv = NULL;
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@ -128,6 +153,7 @@ static int lw35ioc_probe(struct serdev_device *serdev)
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printk(KERN_INFO "lw35ioc: probe\n");
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/* Allocate memory */
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priv = devm_kzalloc(&serdev->dev,
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sizeof(struct lw35ioc_priv),
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GFP_KERNEL);
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@ -135,11 +161,13 @@ static int lw35ioc_probe(struct serdev_device *serdev)
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printk(KERN_ERR "lw35ioc: Not enough memory.\n");
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return -ENOMEM;
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}
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priv->state = PASSIVE;
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priv->serdev = serdev;
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priv->packet.state = SYNC;
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serdev_device_set_drvdata(serdev, priv);
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serdev_device_set_client_ops(serdev, &lw35ioc_serdev_ops);
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/* Register input device */
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input_dev = devm_input_allocate_device(&serdev->dev);
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if (!input_dev) {
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dev_err(&serdev->dev, "Unable to allocate input device.\n");
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@ -156,25 +184,37 @@ static int lw35ioc_probe(struct serdev_device *serdev)
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ret = input_register_device(input_dev);
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if (ret) {
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dev_err(&serdev->dev, "Unable to register input device.\n");
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goto fail0;
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goto fail_input;
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}
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ret = serdev_device_open(serdev);
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if (ret) {
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dev_err(&serdev->dev, "Unable to open device.\n");
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goto fail1;
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goto fail_serdev;
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}
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speed = serdev_device_set_baudrate(serdev, speed);
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dev_info(&serdev->dev, "Using baudrate: %u\n", speed);
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/* Register GPIO */
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priv->gpio_rst = gpiod_get_index(&serdev->dev,
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"rst",
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0,
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GPIOD_OUT_LOW);
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lw35ioc_set_hw_reset(serdev, 0);
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if (IS_ERR(priv->gpio_rst)) {
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dev_err(&serdev->dev, "Unable to get reset GPIO.\n");
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ret = -ENODEV;
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goto fail_gpio;
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}
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dev_info(&serdev->dev, "Loaded driver.\n");
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return 0;
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fail1:
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fail_gpio:
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fail_serdev:
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input_unregister_device(input_dev);
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fail0:
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fail_input:
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devm_kfree(&serdev->dev, input_dev);
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return ret;
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}
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@ -183,6 +223,8 @@ static void lw35ioc_remove(struct serdev_device *serdev)
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{
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struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
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lw35ioc_set_hw_reset(serdev, 1);
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gpiod_put(priv->gpio_rst);
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serdev_device_close(priv->serdev);
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input_unregister_device(priv->input_dev);
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