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-rw-r--r--drivers/input/touchscreen/Kconfig1
-rw-r--r--drivers/input/touchscreen/sun4i-ts.c139
2 files changed, 109 insertions, 31 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 41f8b596dc42..746d3c568e49 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -900,6 +900,7 @@ config TOUCHSCREEN_STMPE
config TOUCHSCREEN_SUN4I
tristate "Allwinner sun4i resistive touchscreen controller support"
depends on ARCH_SUNXI || COMPILE_TEST
+ depends on HWMON
help
This selects support for the resistive touchscreen controller
found on Allwinner sunxi SoCs.
diff --git a/drivers/input/touchscreen/sun4i-ts.c b/drivers/input/touchscreen/sun4i-ts.c
index fc03a5fcd8f8..2ba826024954 100644
--- a/drivers/input/touchscreen/sun4i-ts.c
+++ b/drivers/input/touchscreen/sun4i-ts.c
@@ -3,6 +3,9 @@
*
* Copyright (C) 2013 - 2014 Hans de Goede <hdegoede@redhat.com>
*
+ * The hwmon parts are based on work by Corentin LABBE which is:
+ * Copyright (C) 2013 Corentin LABBE <clabbe.montjoie@gmail.com>
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
@@ -30,6 +33,7 @@
*/
#include <linux/err.h>
+#include <linux/hwmon.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
@@ -106,14 +110,12 @@ struct sun4i_ts_data {
void __iomem *base;
unsigned int irq;
bool ignore_fifo_data;
+ int temp_data;
};
-static irqreturn_t sun4i_ts_irq(int irq, void *dev_id)
+static void sun4i_ts_irq_handle_input(struct sun4i_ts_data *ts, u32 reg_val)
{
- struct sun4i_ts_data *ts = dev_id;
- u32 reg_val, x, y;
-
- reg_val = readl(ts->base + TP_INT_FIFOS);
+ u32 x, y;
if (reg_val & FIFO_DATA_PENDING) {
x = readl(ts->base + TP_DATA);
@@ -139,6 +141,20 @@ static irqreturn_t sun4i_ts_irq(int irq, void *dev_id)
input_report_key(ts->input, BTN_TOUCH, 0);
input_sync(ts->input);
}
+}
+
+static irqreturn_t sun4i_ts_irq(int irq, void *dev_id)
+{
+ struct sun4i_ts_data *ts = dev_id;
+ u32 reg_val;
+
+ reg_val = readl(ts->base + TP_INT_FIFOS);
+
+ if (reg_val & TEMP_DATA_PENDING)
+ ts->temp_data = readl(ts->base + TEMP_DATA);
+
+ if (ts->input)
+ sun4i_ts_irq_handle_input(ts, reg_val);
writel(reg_val, ts->base + TP_INT_FIFOS);
@@ -149,9 +165,9 @@ static int sun4i_ts_open(struct input_dev *dev)
{
struct sun4i_ts_data *ts = input_get_drvdata(dev);
- /* Flush, set trig level to 1, enable data and up irqs */
- writel(DATA_IRQ_EN(1) | FIFO_TRIG(1) | FIFO_FLUSH(1) | TP_UP_IRQ_EN(1),
- ts->base + TP_INT_FIFOC);
+ /* Flush, set trig level to 1, enable temp, data and up irqs */
+ writel(TEMP_IRQ_EN(1) | DATA_IRQ_EN(1) | FIFO_TRIG(1) | FIFO_FLUSH(1) |
+ TP_UP_IRQ_EN(1), ts->base + TP_INT_FIFOC);
return 0;
}
@@ -160,15 +176,46 @@ static void sun4i_ts_close(struct input_dev *dev)
{
struct sun4i_ts_data *ts = input_get_drvdata(dev);
- /* Deactivate all IRQs */
- writel(0, ts->base + TP_INT_FIFOC);
+ /* Deactivate all input IRQs */
+ writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC);
+}
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sun4i_ts_data *ts = dev_get_drvdata(dev);
+
+ /* No temp_data until the first irq */
+ if (ts->temp_data == -1)
+ return -EAGAIN;
+
+ return sprintf(buf, "%d\n", (ts->temp_data - 1447) * 100);
+}
+
+static ssize_t show_temp_label(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ return sprintf(buf, "SoC temperature\n");
}
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
+static DEVICE_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL);
+
+static struct attribute *sun4i_ts_attrs[] = {
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp1_label.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(sun4i_ts);
+
static int sun4i_ts_probe(struct platform_device *pdev)
{
struct sun4i_ts_data *ts;
struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct device *hwmon;
int error;
+ bool ts_attached;
ts = devm_kzalloc(dev, sizeof(struct sun4i_ts_data), GFP_KERNEL);
if (!ts)
@@ -176,24 +223,28 @@ static int sun4i_ts_probe(struct platform_device *pdev)
ts->dev = dev;
ts->ignore_fifo_data = true;
-
- ts->input = devm_input_allocate_device(dev);
- if (!ts->input)
- return -ENOMEM;
-
- ts->input->name = pdev->name;
- ts->input->phys = "sun4i_ts/input0";
- ts->input->open = sun4i_ts_open;
- ts->input->close = sun4i_ts_close;
- ts->input->id.bustype = BUS_HOST;
- ts->input->id.vendor = 0x0001;
- ts->input->id.product = 0x0001;
- ts->input->id.version = 0x0100;
- ts->input->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS);
- __set_bit(BTN_TOUCH, ts->input->keybit);
- input_set_abs_params(ts->input, ABS_X, 0, 4095, 0, 0);
- input_set_abs_params(ts->input, ABS_Y, 0, 4095, 0, 0);
- input_set_drvdata(ts->input, ts);
+ ts->temp_data = -1;
+
+ ts_attached = of_property_read_bool(np, "allwinner,ts-attached");
+ if (ts_attached) {
+ ts->input = devm_input_allocate_device(dev);
+ if (!ts->input)
+ return -ENOMEM;
+
+ ts->input->name = pdev->name;
+ ts->input->phys = "sun4i_ts/input0";
+ ts->input->open = sun4i_ts_open;
+ ts->input->close = sun4i_ts_close;
+ ts->input->id.bustype = BUS_HOST;
+ ts->input->id.vendor = 0x0001;
+ ts->input->id.product = 0x0001;
+ ts->input->id.version = 0x0100;
+ ts->input->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS);
+ __set_bit(BTN_TOUCH, ts->input->keybit);
+ input_set_abs_params(ts->input, ABS_X, 0, 4095, 0, 0);
+ input_set_abs_params(ts->input, ABS_Y, 0, 4095, 0, 0);
+ input_set_drvdata(ts->input, ts);
+ }
ts->base = devm_ioremap_resource(dev,
platform_get_resource(pdev, IORESOURCE_MEM, 0));
@@ -232,14 +283,39 @@ static int sun4i_ts_probe(struct platform_device *pdev)
writel(STYLUS_UP_DEBOUN(5) | STYLUS_UP_DEBOUN_EN(1) | TP_MODE_EN(1),
ts->base + TP_CTRL1);
- error = input_register_device(ts->input);
- if (error)
- return error;
+ hwmon = devm_hwmon_device_register_with_groups(ts->dev, "sun4i_ts",
+ ts, sun4i_ts_groups);
+ if (IS_ERR(hwmon))
+ return PTR_ERR(hwmon);
+
+ writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC);
+
+ if (ts_attached) {
+ error = input_register_device(ts->input);
+ if (error) {
+ writel(0, ts->base + TP_INT_FIFOC);
+ return error;
+ }
+ }
platform_set_drvdata(pdev, ts);
return 0;
}
+static int sun4i_ts_remove(struct platform_device *pdev)
+{
+ struct sun4i_ts_data *ts = platform_get_drvdata(pdev);
+
+ /* Explicit unregister to avoid open/close changing the imask later */
+ if (ts->input)
+ input_unregister_device(ts->input);
+
+ /* Deactivate all IRQs */
+ writel(0, ts->base + TP_INT_FIFOC);
+
+ return 0;
+}
+
static const struct of_device_id sun4i_ts_of_match[] = {
{ .compatible = "allwinner,sun4i-a10-ts", },
{ /* sentinel */ }
@@ -253,6 +329,7 @@ static struct platform_driver sun4i_ts_driver = {
.of_match_table = of_match_ptr(sun4i_ts_of_match),
},
.probe = sun4i_ts_probe,
+ .remove = sun4i_ts_remove,
};
module_platform_driver(sun4i_ts_driver);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-20 22:03:59 +0200