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Message-Id: <20180411141340.30939-2-lukma@denx.de>
Date: Wed, 11 Apr 2018 16:13:40 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
Sascha Hauer <s.hauer@...gutronix.de>,
Lukasz Majewski <lukma@...x.de>
Subject: [PATCH 2/2] input: touchscreen mc13xxx: Add mc34708 support
From: Sascha Hauer <s.hauer@...gutronix.de>
The mc34708 has a different bit to enable pen detection. This
adds the driver data and devtype necessary to probe the device
and to distinguish between the mc13783 and the mc34708.
Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
Changes from the original patch:
- Simplify the mcXXXXX_set_pen_detection functions
- Fix checkpatch warnings
---
drivers/input/touchscreen/mc13783_ts.c | 65 +++++++++++++++++++++++++++++++---
1 file changed, 61 insertions(+), 4 deletions(-)
diff --git a/drivers/input/touchscreen/mc13783_ts.c b/drivers/input/touchscreen/mc13783_ts.c
index 610f10e6aadf..9fcc7069f633 100644
--- a/drivers/input/touchscreen/mc13783_ts.c
+++ b/drivers/input/touchscreen/mc13783_ts.c
@@ -33,6 +33,8 @@ MODULE_PARM_DESC(sample_tolerance,
"is supposed to be wrong and is discarded. Set to 0 to "
"disable this check.");
+struct mc13xxx_driver_data;
+
struct mc13783_ts_priv {
struct input_dev *idev;
struct mc13xxx *mc13xxx;
@@ -40,6 +42,43 @@ struct mc13783_ts_priv {
unsigned int sample[4];
u8 ato;
bool atox;
+ struct mc13xxx_driver_data *drvdata;
+};
+
+enum mc13xxx_type {
+ MC13XXX_TYPE_MC13783,
+ MC13XXX_TYPE_MC34708,
+};
+
+struct mc13xxx_driver_data {
+ int (*set_pen_detection)(struct mc13783_ts_priv *priv, bool enable);
+ enum mc13xxx_type type;
+};
+
+static int mc13783_set_pen_detection(struct mc13783_ts_priv *priv, bool enable)
+{
+ return mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0,
+ MC13XXX_ADC0_TSMOD_MASK,
+ enable ? MC13XXX_ADC0_TSMOD0 : 0);
+}
+
+#define MC34708_ADC0_TSPENDETEN (1 << 20)
+
+static int mc34708_set_pen_detection(struct mc13783_ts_priv *priv, bool enable)
+{
+ return mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0,
+ MC34708_ADC0_TSPENDETEN,
+ enable ? MC34708_ADC0_TSPENDETEN : 0);
+}
+
+static struct mc13xxx_driver_data mc13783_driver_data = {
+ .type = MC13XXX_TYPE_MC13783,
+ .set_pen_detection = mc13783_set_pen_detection,
+};
+
+static struct mc13xxx_driver_data mc34708_driver_data = {
+ .type = MC13XXX_TYPE_MC34708,
+ .set_pen_detection = mc34708_set_pen_detection,
};
static irqreturn_t mc13783_ts_handler(int irq, void *data)
@@ -96,6 +135,10 @@ static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv)
cr0 = (cr0 + cr1) / 2;
+ if (priv->drvdata->type == MC13XXX_TYPE_MC34708)
+ if (cr0 > 4080)
+ cr0 = 0;
+
if (!cr0 || !sample_tolerance ||
(x2 - x0 < sample_tolerance &&
y2 - y0 < sample_tolerance)) {
@@ -148,8 +191,7 @@ static int mc13783_ts_open(struct input_dev *dev)
if (ret)
goto out;
- ret = mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0,
- MC13XXX_ADC0_TSMOD_MASK, MC13XXX_ADC0_TSMOD0);
+ ret = priv->drvdata->set_pen_detection(priv, 1);
if (ret)
mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TS, priv);
out:
@@ -162,8 +204,7 @@ static void mc13783_ts_close(struct input_dev *dev)
struct mc13783_ts_priv *priv = input_get_drvdata(dev);
mc13xxx_lock(priv->mc13xxx);
- mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0,
- MC13XXX_ADC0_TSMOD_MASK, 0);
+ priv->drvdata->set_pen_detection(priv, 0);
mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TS, priv);
mc13xxx_unlock(priv->mc13xxx);
@@ -175,6 +216,7 @@ static int __init mc13783_ts_probe(struct platform_device *pdev)
struct mc13783_ts_priv *priv;
struct mc13xxx_ts_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct input_dev *idev;
+ const struct platform_device_id *id = platform_get_device_id(pdev);
int ret = -ENOMEM;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -185,6 +227,7 @@ static int __init mc13783_ts_probe(struct platform_device *pdev)
INIT_DELAYED_WORK(&priv->work, mc13783_ts_work);
priv->mc13xxx = dev_get_drvdata(pdev->dev.parent);
priv->idev = idev;
+ priv->drvdata = (void *)id->driver_data;
if (pdata) {
priv->atox = pdata->atox;
@@ -231,7 +274,21 @@ static int mc13783_ts_remove(struct platform_device *pdev)
return 0;
}
+static const struct platform_device_id mc13xxx_ts_idtable[] = {
+ {
+ .name = "mc13783-ts",
+ .driver_data = (kernel_ulong_t)&mc13783_driver_data,
+ }, {
+ .name = "mc34708-ts",
+ .driver_data = (kernel_ulong_t)&mc34708_driver_data,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(platform, mc13xxx_ts_idtable);
+
static struct platform_driver mc13783_ts_driver = {
+ .id_table = mc13xxx_ts_idtable,
.remove = mc13783_ts_remove,
.driver = {
.name = MC13783_TS_NAME,
--
2.11.0
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