Support was added based on Goodix GitHub repo [1]. There are two major differences between gt1151 and currently supported devices (gt9x): * CONFIG_DATA register has 0x8050 address instead of 0x8047, * config data checksum has 16-bit width instead of 8-bit. Also update goodix_i2c_test() function, so it reads ID register (which has the same address for all devices) instead of CONFIG_DATA (because its address is known only after reading ID of the device). [1] https://github.com/goodix/gt1x_driver_generic Signed-off-by: Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx> --- Patch was developed and tested on top of 4.14-rc4 using custom board. .../bindings/input/touchscreen/goodix.txt | 3 +- drivers/input/touchscreen/goodix.c | 88 +++++++++++++++++----- 2 files changed, 70 insertions(+), 21 deletions(-) diff --git a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt index c98757a69110..0c369d8ebcab 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt +++ b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt @@ -2,7 +2,8 @@ Device tree bindings for Goodix GT9xx series touchscreen controller Required properties: - - compatible : Should be "goodix,gt911" + - compatible : Should be "goodix,gt1151" + or "goodix,gt911" or "goodix,gt9110" or "goodix,gt912" or "goodix,gt927" diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c index 32d2762448aa..9d50d9688975 100644 --- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -41,6 +41,7 @@ struct goodix_ts_data { bool inverted_y; unsigned int max_touch_num; unsigned int int_trigger_type; + u16 reg_config_data; int cfg_len; struct gpio_desc *gpiod_int; struct gpio_desc *gpiod_rst; @@ -69,7 +70,8 @@ struct goodix_ts_data { #define GOODIX_CMD_SCREEN_OFF 0x05 #define GOODIX_READ_COOR_ADDR 0x814E -#define GOODIX_REG_CONFIG_DATA 0x8047 +#define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 +#define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 #define GOODIX_REG_ID 0x8140 #define RESOLUTION_LOC 1 @@ -193,6 +195,16 @@ static int goodix_get_cfg_len(u16 id) } } +static int goodix_get_reg_config_data(u16 id) +{ + switch (id) { + case 1151: + return GOODIX_GT1X_REG_CONFIG_DATA; + default: + return GOODIX_GT9X_REG_CONFIG_DATA; + } +} + static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) { int touch_num; @@ -311,25 +323,12 @@ static int goodix_request_irq(struct goodix_ts_data *ts) ts->irq_flags, ts->client->name, ts); } -/** - * goodix_check_cfg - Checks if config fw is valid - * - * @ts: goodix_ts_data pointer - * @cfg: firmware config data - */ -static int goodix_check_cfg(struct goodix_ts_data *ts, - const struct firmware *cfg) +static int goodix_check_cfg_8(struct goodix_ts_data *ts, + const struct firmware *cfg) { - int i, raw_cfg_len; + int i, raw_cfg_len = cfg->size - 2; u8 check_sum = 0; - if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { - dev_err(&ts->client->dev, - "The length of the config fw is not correct"); - return -EINVAL; - } - - raw_cfg_len = cfg->size - 2; for (i = 0; i < raw_cfg_len; i++) check_sum += cfg->data[i]; check_sum = (~check_sum) + 1; @@ -348,6 +347,53 @@ static int goodix_check_cfg(struct goodix_ts_data *ts, return 0; } +static int goodix_check_cfg_16(struct goodix_ts_data *ts, + const struct firmware *cfg) +{ + int i, raw_cfg_len = cfg->size - 3; + u16 check_sum = 0; + + for (i = 0; i < raw_cfg_len; i += 2) + check_sum += get_unaligned_be16(&cfg->data[i]); + check_sum = (~check_sum) + 1; + if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { + dev_err(&ts->client->dev, + "The checksum of the config fw is not correct"); + return -EINVAL; + } + + if (cfg->data[raw_cfg_len + 2] != 1) { + dev_err(&ts->client->dev, + "Config fw must have Config_Fresh register set"); + return -EINVAL; + } + + return 0; +} + +/** + * goodix_check_cfg - Checks if config fw is valid + * + * @ts: goodix_ts_data pointer + * @cfg: firmware config data + */ +static int goodix_check_cfg(struct goodix_ts_data *ts, + const struct firmware *cfg) +{ + if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { + dev_err(&ts->client->dev, + "The length of the config fw is not correct"); + return -EINVAL; + } + + switch (ts->id) { + case 1151: + return goodix_check_cfg_16(ts, cfg); + default: + return goodix_check_cfg_8(ts, cfg); + } +} + /** * goodix_send_cfg - Write fw config to device * @@ -363,7 +409,7 @@ static int goodix_send_cfg(struct goodix_ts_data *ts, if (error) return error; - error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data, + error = goodix_i2c_write(ts->client, ts->reg_config_data, cfg->data, cfg->size); if (error) { dev_err(&ts->client->dev, "Failed to write config data: %d", @@ -490,7 +536,7 @@ static void goodix_read_config(struct goodix_ts_data *ts) u8 config[GOODIX_CONFIG_MAX_LENGTH]; int error; - error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA, + error = goodix_i2c_read(ts->client, ts->reg_config_data, config, ts->cfg_len); if (error) { dev_warn(&ts->client->dev, @@ -571,7 +617,7 @@ static int goodix_i2c_test(struct i2c_client *client) u8 test; while (retry++ < 2) { - error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA, + error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); if (!error) return 0; @@ -741,6 +787,7 @@ static int goodix_ts_probe(struct i2c_client *client, return error; } + ts->reg_config_data = goodix_get_reg_config_data(ts->id); ts->cfg_len = goodix_get_cfg_len(ts->id); if (ts->gpiod_int && ts->gpiod_rst) { @@ -870,6 +917,7 @@ MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); #ifdef CONFIG_OF static const struct of_device_id goodix_of_match[] = { + { .compatible = "goodix,gt1151" }, { .compatible = "goodix,gt911" }, { .compatible = "goodix,gt9110" }, { .compatible = "goodix,gt912" }, -- 2.14.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
