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Date: Wed, 24 Jan 2018 13:32:01 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Marcus Folkesson <marcus.folkesson@...il.com>
Cc: Simon Shields <simon@...eageos.org>,
Andi Shyti <andi.shyti@...sung.com>,
Rob Herring <robh@...nel.org>, linux-input@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 4/4 v2] Input: mms114 - add support for mms152
From: Simon Shields <simon@...eageos.org>
MMS152 has no configuration registers, but the packet format used in
interrupts is identical to mms114.
Signed-off-by: Simon Shields <simon@...eageos.org>
Patchwork-Id: 10125841
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
V2: Fixed issue pointed by Marcus Folkesson.
.../bindings/input/touchscreen/mms114.txt | 6 +
drivers/input/touchscreen/mms114.c | 92 ++++++++++++++++----
2 files changed, 77 insertions(+), 21 deletions(-)
diff --git a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
index 8f9f9f38eff4a..2cd954051d299 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
@@ -1,7 +1,9 @@
-* MELFAS MMS114 touchscreen controller
+* MELFAS MMS114/MMS152 touchscreen controller
Required properties:
-- compatible: must be "melfas,mms114"
+- compatible: should be one of:
+ - "melfas,mms114"
+ - "melfas,mms152"
- reg: I2C address of the chip
- interrupts: interrupt to which the chip is connected
- touchscreen-size-x: See [1]
diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index 69e4288bf8aa3..c54f4afe11037 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/i2c.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
@@ -33,6 +34,9 @@
#define MMS114_INFOMATION 0x10
#define MMS114_TSP_REV 0xF0
+#define MMS152_FW_REV 0xE1
+#define MMS152_COMPAT_GROUP 0xF2
+
/* Minimum delay time is 50us between stop and start signal of i2c */
#define MMS114_I2C_DELAY 50
@@ -50,12 +54,18 @@
#define MMS114_TYPE_TOUCHSCREEN 1
#define MMS114_TYPE_TOUCHKEY 2
+enum mms_type {
+ TYPE_MMS114 = 114,
+ TYPE_MMS152 = 152,
+};
+
struct mms114_data {
struct i2c_client *client;
struct input_dev *input_dev;
struct regulator *core_reg;
struct regulator *io_reg;
struct touchscreen_properties props;
+ enum mms_type type;
unsigned int contact_threshold;
unsigned int moving_threshold;
@@ -239,14 +249,33 @@ static int mms114_get_version(struct mms114_data *data)
{
struct device *dev = &data->client->dev;
u8 buf[6];
+ int group;
int error;
- error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
- if (error < 0)
- return error;
+ switch (data->type) {
+ case TYPE_MMS152:
+ error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf);
+ if (error)
+ return error;
+
+ group = i2c_smbus_read_byte_data(data->client,
+ MMS152_COMPAT_GROUP);
+ if (group < 0)
+ return group;
+
+ dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n",
+ buf[0], buf[1], buf[2], group);
+ break;
+
+ case TYPE_MMS114:
+ error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
+ if (error)
+ return error;
- dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
- buf[0], buf[1], buf[3]);
+ dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
+ buf[0], buf[1], buf[3]);
+ break;
+ }
return 0;
}
@@ -261,6 +290,10 @@ static int mms114_setup_regs(struct mms114_data *data)
if (error < 0)
return error;
+ /* MMS152 has no configuration or power on registers */
+ if (data->type == TYPE_MMS152)
+ return 0;
+
error = mms114_set_active(data, true);
if (error < 0)
return error;
@@ -395,6 +428,7 @@ static int mms114_probe(struct i2c_client *client,
{
struct mms114_data *data;
struct input_dev *input_dev;
+ const void *match_data;
int error;
if (!i2c_check_functionality(client->adapter,
@@ -415,6 +449,13 @@ static int mms114_probe(struct i2c_client *client,
data->client = client;
data->input_dev = input_dev;
+ /* FIXME: switch to device_get_match_data() when available */
+ match_data = of_device_get_match_data(&client->dev);
+ if (!match_data)
+ return -EINVAL;
+
+ data->type = (enum mms_type)match_data;
+
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
@@ -435,19 +476,26 @@ static int mms114_probe(struct i2c_client *client,
0, data->props.max_y, 0, 0);
}
- /*
- * The firmware handles movement and pressure fuzz, so
- * don't duplicate that in software.
- */
- data->moving_threshold = input_abs_get_fuzz(input_dev,
- ABS_MT_POSITION_X);
- data->contact_threshold = input_abs_get_fuzz(input_dev,
- ABS_MT_PRESSURE);
- input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
- input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
- input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
-
- input_dev->name = "MELFAS MMS114 Touchscreen";
+ if (data->type == TYPE_MMS114) {
+ /*
+ * The firmware handles movement and pressure fuzz, so
+ * don't duplicate that in software.
+ */
+ data->moving_threshold = input_abs_get_fuzz(input_dev,
+ ABS_MT_POSITION_X);
+ data->contact_threshold = input_abs_get_fuzz(input_dev,
+ ABS_MT_PRESSURE);
+ input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
+ input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
+ input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
+ }
+
+ input_dev->name = devm_kasprintf(&client->dev, GFP_KERNEL,
+ "MELFAS MMS%d Touchscreen",
+ data->type);
+ if (!input_dev->name)
+ return -ENOMEM;
+
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &client->dev;
input_dev->open = mms114_input_open;
@@ -549,7 +597,13 @@ MODULE_DEVICE_TABLE(i2c, mms114_id);
#ifdef CONFIG_OF
static const struct of_device_id mms114_dt_match[] = {
- { .compatible = "melfas,mms114" },
+ {
+ .compatible = "melfas,mms114",
+ .data = (void *)TYPE_MMS114,
+ }, {
+ .compatible = "melfas,mms152",
+ .data = (void *)TYPE_MMS152,
+ },
{ }
};
MODULE_DEVICE_TABLE(of, mms114_dt_match);
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