Re: [PATCH v2 1/9] input: elants: document some registers and values

[Dmitry Osipenko]

11.12.2019 19:03, MichaÅ MirosÅaw ÐÐÑÐÑ:
> Add information found in downstream kernels, to make the code less
> magic.
> 
> Signed-off-by: MichaÅ MirosÅaw <mirq-linux@xxxxxxxxxxxx>
> ---
>  drivers/input/touchscreen/elants_i2c.c | 29 +++++++++++++++++++++-----
>  1 file changed, 24 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
> index d4ad24ea54c8..887888c53996 100644
> --- a/drivers/input/touchscreen/elants_i2c.c
> +++ b/drivers/input/touchscreen/elants_i2c.c
> @@ -77,7 +77,11 @@
>  
>  #define HEADER_REPORT_10_FINGER	0x62
>  
> -/* Header (4 bytes) plus 3 fill 10-finger packets */
> +/* Power state */
> +#define PWR_STATE_DEEP_SLEEP	0
> +#define PWR_STATE_NORMAL	1
> +
> +/* Header (4 bytes) plus 3 full 10-finger packets */
>  #define MAX_PACKET_SIZE		169
>  
>  #define BOOT_TIME_DELAY_MS	50
> @@ -87,10 +91,21 @@
>  #define E_ELAN_INFO_BC_VER	0x10
>  #define E_ELAN_INFO_TEST_VER	0xE0
>  #define E_ELAN_INFO_FW_ID	0xF0
> +#define E_POWER_MODE		0x40
> +#define E_POWER_STATE		0x50
> +#define E_INFO_X_RES		0x60
> +#define E_INFO_Y_RES		0x63
>  #define E_INFO_OSR		0xD6
>  #define E_INFO_PHY_SCAN		0xD7
>  #define E_INFO_PHY_DRIVER	0xD8

> +/* FW write command, 0x54 0x?? 0x0, 0x01 */
> +#define E_POWER_MODE_BATTERY	0x40
> +#define E_POWER_MODE_AC		0x41

These commands are not utilized yet, but perhaps it's okay to add the
definitions if you're going to add support for power source switching.

> +#define E_POWER_MODE_USB	0x42
> +#define E_POWER_STATE_SLEEP	0x50
> +#define E_POWER_STATE_RESUME	0x58
> +
>  #define MAX_RETRIES		3
>  #define MAX_FW_UPDATE_RETRIES	30
>  
> @@ -231,8 +246,8 @@ 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);
> @@ -1295,7 +1310,9 @@ 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;
>  
> @@ -1332,7 +1349,9 @@ 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;
>  
> 

Reviewed-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Tested-by: Dmitry Osipenko <digetx@xxxxxxxxx>