From 72b0c0cf9720cd139829610cfcd9ac294451a9f8 Mon Sep 17 00:00:00 2001 From: Simon Shields Date: Tue, 23 Jan 2018 12:02:39 -0800 Subject: [PATCH] Input: mms114 - add support for mms152 MMS152 has no configuration registers, but the packet format used in interrupts is identical to mms114. Signed-off-by: Simon Shields Reviewed-by: Andi Shyti Tested-by: Andi Shyti Signed-off-by: Dmitry Torokhov --- .../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 8f9f9f3..2cd9540 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 69e4288..c54f4af 100644 --- a/drivers/input/touchscreen/mms114.c +++ b/drivers/input/touchscreen/mms114.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -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); -- 2.7.4