Input: synaptics_i2c_rmi: Add support for panels with has-no-relative-data property.

Signed-off-by: Arve Hjønnevåg <arve@android.com>

diff --git a/drivers/input/touchscreen/synaptics_i2c_rmi.c b/drivers/input/touchscreen/synaptics_i2c_rmi.c
index b08c36cc334532f821d37f37074b571658271707..4ad4cc9cfec3e54953d04448b56706e0a33b80fd 100644 (file)
--- a/drivers/input/touchscreen/synaptics_i2c_rmi.c
+++ b/drivers/input/touchscreen/synaptics_i2c_rmi.c
@@ -31,6 +31,7 @@ struct synaptics_ts_data {
        struct i2c_client *client;
        struct input_dev *input_dev;
        int use_irq;
+       bool has_relative_report;
        struct hrtimer timer;
        struct work_struct  work;
        uint16_t max[2];
@@ -83,6 +84,7 @@ static void synaptics_ts_work_func(struct work_struct *work)
        uint8_t start_reg;
        uint8_t buf[15];
        struct synaptics_ts_data *ts = container_of(work, struct synaptics_ts_data, work);
+       int buf_len = ts->has_relative_report ? 15 : 13;
 
        msg[0].addr = ts->client->addr;
        msg[0].flags = 0;
@@ -91,7 +93,7 @@ static void synaptics_ts_work_func(struct work_struct *work)
        start_reg = 0x00;
        msg[1].addr = ts->client->addr;
        msg[1].flags = I2C_M_RD;
-       msg[1].len = sizeof(buf);
+       msg[1].len = buf_len;
        msg[1].buf = buf;
 
        /* printk("synaptics_ts_work_func\n"); */
@@ -107,7 +109,7 @@ static void synaptics_ts_work_func(struct work_struct *work)
                        /*        buf[4], buf[5], buf[6], buf[7], */
                        /*        buf[8], buf[9], buf[10], buf[11], */
                        /*        buf[12], buf[13], buf[14], ret); */
-                       if ((buf[14] & 0xc0) != 0x40) {
+                       if ((buf[buf_len - 1] & 0xc0) != 0x40) {
                                printk(KERN_WARNING "synaptics_ts_work_func:"
                                       " bad read %x %x %x %x %x %x %x %x %x"
                                       " %x %x %x %x %x %x, ret %d\n",
@@ -121,7 +123,7 @@ static void synaptics_ts_work_func(struct work_struct *work)
                                continue;
                        }
                        bad_data = 0;
-                       if ((buf[14] & 1) == 0) {
+                       if ((buf[buf_len - 1] & 1) == 0) {
                                /* printk("read %d coordinates\n", i); */
                                break;
                        } else {
@@ -392,6 +394,13 @@ static int synaptics_ts_probe(
                printk(KERN_ERR "i2c_smbus_write_byte_data failed for page select\n");
                goto err_detect_failed;
        }
+       ret = i2c_smbus_read_word_data(ts->client, 0x02);
+       if (ret < 0) {
+               printk(KERN_ERR "i2c_smbus_read_word_data failed\n");
+               goto err_detect_failed;
+       }
+       ts->has_relative_report = !(ret & 0x100);
+       printk(KERN_INFO "synaptics_ts_probe: Sensor properties %x\n", ret);
        ret = i2c_smbus_read_word_data(ts->client, 0x04);
        if (ret < 0) {
                printk(KERN_ERR "i2c_smbus_read_word_data failed\n");