Commit c18b443c authored by Michał Mirosław's avatar Michał Mirosław Committed by Dmitry Torokhov
Browse files

Input: elants - document some registers and values 



Add information found in downstream kernels, to make the code less
magic.

Signed-off-by: default avatarMichał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: default avatarDmitry Osipenko <digetx@gmail.com>
Tested-by: default avatarDmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/728fff020bc92be10d84cc2a7ea8af6fd99af96c.1607669375.git.mirq-linux@rere.qmqm.pl


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 3d722dd4

drivers/input/touchscreen/elants_i2c.c

+13 −5
Original line number Diff line number Diff line
@@ -82,7 +82,7 @@ 


#define HEADER_REPORT_10_FINGER	0x62



/* Header (4 bytes) plus 3 fill 10-finger packets */

/* Header (4 bytes) plus 3 full 10-finger packets */

#define MAX_PACKET_SIZE		169



#define BOOT_TIME_DELAY_MS	50
@@ -97,6 +97,10 @@ 
#define E_INFO_PHY_SCAN		0xD7

#define E_INFO_PHY_DRIVER	0xD8



/* FW write command, 0x54 0x?? 0x0, 0x01 */

#define E_POWER_STATE_SLEEP	0x50

#define E_POWER_STATE_RESUME	0x58



#define MAX_RETRIES		3

#define MAX_FW_UPDATE_RETRIES	30
@@ -269,8 +273,8 @@ static int elants_i2c_calibrate(struct elants_data *ts) 
{

	struct i2c_client *client = ts->client;

	int ret, error;

	static const u8 w_flashkey[] = { 0x54, 0xC0, 0xE1, 0x5A };

	static const u8 rek[] = { 0x54, 0x29, 0x00, 0x01 };

	static const u8 w_flashkey[] = { CMD_HEADER_WRITE, 0xC0, 0xE1, 0x5A };

	static const u8 rek[] = { CMD_HEADER_WRITE, 0x29, 0x00, 0x01 };

	static const u8 rek_resp[] = { CMD_HEADER_REK, 0x66, 0x66, 0x66 };



	disable_irq(client->irq);
@@ -1388,7 +1392,9 @@ static int __maybe_unused elants_i2c_suspend(struct device *dev) 
{

	struct i2c_client *client = to_i2c_client(dev);

	struct elants_data *ts = i2c_get_clientdata(client);

	const u8 set_sleep_cmd[] = { 0x54, 0x50, 0x00, 0x01 };

	const u8 set_sleep_cmd[] = {

		CMD_HEADER_WRITE, E_POWER_STATE_SLEEP, 0x00, 0x01

	};

	int retry_cnt;

	int error;
@@ -1425,7 +1431,9 @@ static int __maybe_unused elants_i2c_resume(struct device *dev) 
{

	struct i2c_client *client = to_i2c_client(dev);

	struct elants_data *ts = i2c_get_clientdata(client);

	const u8 set_active_cmd[] = { 0x54, 0x58, 0x00, 0x01 };

	const u8 set_active_cmd[] = {

		CMD_HEADER_WRITE, E_POWER_STATE_RESUME, 0x00, 0x01

	};

	int retry_cnt;

	int error;