Input: atmel_mxt_ts - read screen config from chip

By reading the touchscreen configuration from the settings that the
maXTouch chip is actually using, we can remove some platform data.

The matrix size is not used for anything, and results in some rather
confusing code to re-read it because it may change when configuration
is downloaded, so don't print it out.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Benson Leung <bleung@chromium.org>
Acked-by: Yufeng Shen <miletus@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/arch/arm/mach-s5pv210/mach-goni.c b/arch/arm/mach-s5pv210/mach-goni.c
index e549ecf..bb9354f 100644 (file)
--- a/arch/arm/mach-s5pv210/mach-goni.c
+++ b/arch/arm/mach-s5pv210/mach-goni.c
@@ -239,9 +239,6 @@ static void __init goni_radio_init(void)
 
 /* TSP */
 static struct mxt_platform_data qt602240_platform_data = {
-       .x_size         = 800,
-       .y_size         = 480,
-       .orient         = MXT_DIAGONAL,
        .irqflags       = IRQF_TRIGGER_FALLING,
 };
 

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 7a9197a..75493ca 100644 (file)
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -100,33 +100,16 @@
 
 /* MXT_TOUCH_MULTI_T9 field */
 #define MXT_TOUCH_CTRL         0
-#define MXT_TOUCH_XORIGIN      1
-#define MXT_TOUCH_YORIGIN      2
-#define MXT_TOUCH_XSIZE                3
-#define MXT_TOUCH_YSIZE                4
-#define MXT_TOUCH_BLEN         6
-#define MXT_TOUCH_TCHTHR       7
-#define MXT_TOUCH_TCHDI                8
-#define MXT_TOUCH_ORIENT       9
-#define MXT_TOUCH_MOVHYSTI     11
-#define MXT_TOUCH_MOVHYSTN     12
-#define MXT_TOUCH_NUMTOUCH     14
-#define MXT_TOUCH_MRGHYST      15
-#define MXT_TOUCH_MRGTHR       16
-#define MXT_TOUCH_AMPHYST      17
-#define MXT_TOUCH_XRANGE_LSB   18
-#define MXT_TOUCH_XRANGE_MSB   19
-#define MXT_TOUCH_YRANGE_LSB   20
-#define MXT_TOUCH_YRANGE_MSB   21
-#define MXT_TOUCH_XLOCLIP      22
-#define MXT_TOUCH_XHICLIP      23
-#define MXT_TOUCH_YLOCLIP      24
-#define MXT_TOUCH_YHICLIP      25
-#define MXT_TOUCH_XEDGECTRL    26
-#define MXT_TOUCH_XEDGEDIST    27
-#define MXT_TOUCH_YEDGECTRL    28
-#define MXT_TOUCH_YEDGEDIST    29
-#define MXT_TOUCH_JUMPLIMIT    30
+#define MXT_T9_ORIENT          9
+#define MXT_T9_RANGE           18
+
+struct t9_range {
+       u16 x;
+       u16 y;
+} __packed;
+
+/* Touch orient bits */
+#define MXT_XY_SWITCH          (1 << 0)
 
 /* MXT_PROCI_GRIPFACE_T20 field */
 #define MXT_GRIPFACE_CTRL      0
@@ -211,11 +194,6 @@
 #define MXT_PRESS              (1 << 6)
 #define MXT_DETECT             (1 << 7)
 
-/* Touch orient bits */
-#define MXT_XY_SWITCH          (1 << 0)
-#define MXT_X_INVERT           (1 << 1)
-#define MXT_Y_INVERT           (1 << 2)
-
 /* Touchscreen absolute values */
 #define MXT_MAX_AREA           0xff
 
@@ -580,11 +558,6 @@ static int __mxt_read_reg(struct i2c_client *client,
        return ret;
 }
 
-static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
-{
-       return __mxt_read_reg(client, reg, 1, val);
-}
-
 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
                           const void *val)
 {
@@ -1029,12 +1002,59 @@ static void mxt_free_object_table(struct mxt_data *data)
        data->T19_reportid = 0;
 }
 
+static int mxt_read_t9_resolution(struct mxt_data *data)
+{
+       struct i2c_client *client = data->client;
+       int error;
+       struct t9_range range;
+       unsigned char orient;
+       struct mxt_object *object;
+
+       object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
+       if (!object)
+               return -EINVAL;
+
+       error = __mxt_read_reg(client,
+                              object->start_address + MXT_T9_RANGE,
+                              sizeof(range), &range);
+       if (error)
+               return error;
+
+       le16_to_cpus(&range.x);
+       le16_to_cpus(&range.y);
+
+       error =  __mxt_read_reg(client,
+                               object->start_address + MXT_T9_ORIENT,
+                               1, &orient);
+       if (error)
+               return error;
+
+       /* Handle default values */
+       if (range.x == 0)
+               range.x = 1023;
+
+       if (range.y == 0)
+               range.y = 1023;
+
+       if (orient & MXT_XY_SWITCH) {
+               data->max_x = range.y;
+               data->max_y = range.x;
+       } else {
+               data->max_x = range.x;
+               data->max_y = range.y;
+       }
+
+       dev_dbg(&client->dev,
+               "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
+
+       return 0;
+}
+
 static int mxt_initialize(struct mxt_data *data)
 {
        struct i2c_client *client = data->client;
        struct mxt_info *info = &data->info;
        int error;
-       u8 val;
 
        error = mxt_get_info(data);
        if (error)
@@ -1063,26 +1083,16 @@ static int mxt_initialize(struct mxt_data *data)
                goto err_free_object_table;
        }
 
-       /* Update matrix size at info struct */
-       error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
-       if (error)
-               goto err_free_object_table;
-       info->matrix_xsize = val;
-
-       error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
-       if (error)
+       error = mxt_read_t9_resolution(data);
+       if (error) {
+               dev_err(&client->dev, "Failed to initialize T9 resolution\n");
                goto err_free_object_table;
-       info->matrix_ysize = val;
-
-       dev_info(&client->dev,
-                       "Family: %u Variant: %u Firmware V%u.%u.%02X\n",
-                       info->family_id, info->variant_id, info->version >> 4,
-                       info->version & 0xf, info->build);
+       }
 
        dev_info(&client->dev,
-                       "Matrix X Size: %u Matrix Y Size: %u Objects: %u\n",
-                       info->matrix_xsize, info->matrix_ysize,
-                       info->object_num);
+                "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
+                info->family_id, info->variant_id, info->version >> 4,
+                info->version & 0xf, info->build, info->object_num);
 
        return 0;
 
@@ -1091,20 +1101,6 @@ err_free_object_table:
        return error;
 }
 
-static void mxt_calc_resolution(struct mxt_data *data)
-{
-       unsigned int max_x = data->pdata->x_size - 1;
-       unsigned int max_y = data->pdata->y_size - 1;
-
-       if (data->pdata->orient & MXT_XY_SWITCH) {
-               data->max_x = max_y;
-               data->max_y = max_x;
-       } else {
-               data->max_x = max_x;
-               data->max_y = max_y;
-       }
-}
-
 /* Firmware Version is returned as Major.Minor.Build */
 static ssize_t mxt_fw_version_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
@@ -1430,8 +1426,6 @@ static int mxt_probe(struct i2c_client *client,
        init_completion(&data->reset_completion);
        init_completion(&data->crc_completion);
 
-       mxt_calc_resolution(data);
-
        error = mxt_initialize(data);
        if (error)
                goto err_free_mem;

diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 8b7523a..7f1a2e2 100644 (file)
--- a/drivers/platform/chrome/chromeos_laptop.c
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -94,9 +94,6 @@ static int mxt_t19_keys[] = {
 };
 
 static struct mxt_platform_data atmel_224s_tp_platform_data = {
-       .x_size                 = 102*20,
-       .y_size                 = 68*20,
-       .orient                 = MXT_VERTICAL_FLIP,
        .irqflags               = IRQF_TRIGGER_FALLING,
        .t19_num_keys           = ARRAY_SIZE(mxt_t19_keys),
        .t19_keymap             = mxt_t19_keys,
@@ -111,9 +108,6 @@ static struct i2c_board_info atmel_224s_tp_device = {
 };
 
 static struct mxt_platform_data atmel_1664s_platform_data = {
-       .x_size                 = 1700,
-       .y_size                 = 2560,
-       .orient                 = MXT_ROTATED_90_COUNTER,
        .irqflags               = IRQF_TRIGGER_FALLING,
        .config                 = NULL,
        .config_length          = 0,

diff --git a/include/linux/i2c/atmel_mxt_ts.h b/include/linux/i2c/atmel_mxt_ts.h
index 9f92135..3891dc1 100644 (file)
--- a/include/linux/i2c/atmel_mxt_ts.h
+++ b/include/linux/i2c/atmel_mxt_ts.h
@@ -15,26 +15,11 @@
 
 #include <linux/types.h>
 
-/* Orient */
-#define MXT_NORMAL             0x0
-#define MXT_DIAGONAL           0x1
-#define MXT_HORIZONTAL_FLIP    0x2
-#define MXT_ROTATED_90_COUNTER 0x3
-#define MXT_VERTICAL_FLIP      0x4
-#define MXT_ROTATED_90         0x5
-#define MXT_ROTATED_180                0x6
-#define MXT_DIAGONAL_COUNTER   0x7
-
 /* The platform data for the Atmel maXTouch touchscreen driver */
 struct mxt_platform_data {
        const u8 *config;
        size_t config_length;
        u32 config_crc;
-
-       unsigned int x_size;
-       unsigned int y_size;
-       unsigned char orient;
-
        unsigned long irqflags;
        u8 t19_num_keys;
        const unsigned int *t19_keymap;