[PATCH 0/3] Add support for Goodix GT917S touch controller

[PATCH 0/3] Add support for Goodix GT917S touch controller

[Icenowy Zheng]

This patchset introduces support for Goodix GT917S touch controller.

The major difference with other touch controllers from Goodix is that
the ID string is no longer number-only (it contains a 'S'), so an
additional patch is introduced for migrating the ID to a string.

Icenowy Zheng (3):
  dt-bindings: input: touchscreen: add compatible string for Goodix
    GT917S
  Input: goodix - use string-based chip ID
  Input: goodix - Add support for Goodix GT917S

 .../bindings/input/touchscreen/goodix.txt     |  1 +
 drivers/input/touchscreen/goodix.c            | 41 +++++++++----------
 2 files changed, 21 insertions(+), 21 deletions(-)

-- 
2.23.0

[PATCH 1/3] dt-bindings: input: touchscreen: add compatible string for Goodix GT917S

[Icenowy Zheng]

Goodix GT917S is a new touchscreen chip from Goodix.

Add its compatible string to the device tree binding.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
 Documentation/devicetree/bindings/input/touchscreen/goodix.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt
index fc03ea4cf5ab..c5447b136eb3 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt
@@ -8,6 +8,7 @@ Required properties:
 				 or "goodix,gt911"
 				 or "goodix,gt9110"
 				 or "goodix,gt912"
+				 or "goodix,gt917s"
 				 or "goodix,gt927"
 				 or "goodix,gt9271"
 				 or "goodix,gt928"
-- 
2.23.0

[PATCH 2/3] Input: goodix - use string-based chip ID

[Icenowy Zheng]

For Goodix GT917S chip, the chip ID string is "917S", which contains not
only numbers now.

Use string-based chip ID in the driver to support this chip and further
chips with alphanumber ID.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
 drivers/input/touchscreen/goodix.c | 39 ++++++++++++++----------------
 1 file changed, 18 insertions(+), 21 deletions(-)

diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 0403102e807e..bfd067d7145e 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -48,7 +48,7 @@ struct goodix_ts_data {
 	struct regulator *vddio;
 	struct gpio_desc *gpiod_int;
 	struct gpio_desc *gpiod_rst;
-	u16 id;
+	char id[5];
 	u16 version;
 	const char *cfg_name;
 	struct completion firmware_loading_complete;
@@ -235,28 +235,25 @@ static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
 	return goodix_i2c_write(client, reg, &value, sizeof(value));
 }
 
-static const struct goodix_chip_data *goodix_get_chip_data(u16 id)
+static const struct goodix_chip_data *goodix_get_chip_data(const char *id)
 {
-	switch (id) {
-	case 1151:
-	case 5663:
-	case 5688:
+	if (!strcmp(id, "1151") ||
+	    !strcmp(id, "5663") ||
+	    !strcmp(id, "5688"))
 		return &gt1x_chip_data;
 
-	case 911:
-	case 9271:
-	case 9110:
-	case 927:
-	case 928:
+	if (!strcmp(id, "911") ||
+	    !strcmp(id, "9271") ||
+	    !strcmp(id, "9110") ||
+	    !strcmp(id, "927") ||
+	    !strcmp(id, "928"))
 		return &gt911_chip_data;
 
-	case 912:
-	case 967:
+	if (!strcmp(id, "912") ||
+	    !strcmp(id, "967"))
 		return &gt967_chip_data;
 
-	default:
-		return &gt9x_chip_data;
-	}
+	return &gt9x_chip_data;
 }
 
 static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
@@ -673,12 +670,11 @@ static int goodix_read_version(struct goodix_ts_data *ts)
 
 	memcpy(id_str, buf, 4);
 	id_str[4] = 0;
-	if (kstrtou16(id_str, 10, &ts->id))
-		ts->id = 0x1001;
+	strscpy(ts->id, id_str, 5);
 
 	ts->version = get_unaligned_le16(&buf[4]);
 
-	dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id,
+	dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id,
 		 ts->version);
 
 	return 0;
@@ -736,7 +732,8 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
 	ts->input_dev->phys = "input/ts";
 	ts->input_dev->id.bustype = BUS_I2C;
 	ts->input_dev->id.vendor = 0x0416;
-	ts->input_dev->id.product = ts->id;
+	if (kstrtou16(ts->id, 10, &ts->input_dev->id.product))
+		ts->input_dev->id.product = 0x1001;
 	ts->input_dev->id.version = ts->version;
 
 	/* Capacitive Windows/Home button on some devices */
@@ -915,7 +912,7 @@ static int goodix_ts_probe(struct i2c_client *client,
 	if (ts->gpiod_int && ts->gpiod_rst) {
 		/* update device config */
 		ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL,
-					      "goodix_%d_cfg.bin", ts->id);
+					      "goodix_%s_cfg.bin", ts->id);
 		if (!ts->cfg_name)
 			return -ENOMEM;
 
-- 
2.23.0

[PATCH 3/3] Input: goodix - Add support for Goodix GT917S

[Icenowy Zheng]

Goodix GT917S is a touchscreen chip from Goodix that is in the GT1x
family.

Add its support by assigning the gt1x config to it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
 drivers/input/touchscreen/goodix.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index bfd067d7145e..43d8e1b8fb7f 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -239,7 +239,8 @@ static const struct goodix_chip_data *goodix_get_chip_data(const char *id)
 {
 	if (!strcmp(id, "1151") ||
 	    !strcmp(id, "5663") ||
-	    !strcmp(id, "5688"))
+	    !strcmp(id, "5688") ||
+	    !strcmp(id, "917S"))
 		return &gt1x_chip_data;
 
 	if (!strcmp(id, "911") ||
@@ -1047,6 +1048,7 @@ static const struct of_device_id goodix_of_match[] = {
 	{ .compatible = "goodix,gt911" },
 	{ .compatible = "goodix,gt9110" },
 	{ .compatible = "goodix,gt912" },
+	{ .compatible = "goodix,gt917s" },
 	{ .compatible = "goodix,gt927" },
 	{ .compatible = "goodix,gt9271" },
 	{ .compatible = "goodix,gt928" },
-- 
2.23.0

Re: [PATCH 2/3] Input: goodix - use string-based chip ID

[Dmitry Torokhov]

On Sat, Jan 11, 2020 at 12:26:07AM +0800, Icenowy Zheng wrote:
> For Goodix GT917S chip, the chip ID string is "917S", which contains not
> only numbers now.
> 
> Use string-based chip ID in the driver to support this chip and further
> chips with alphanumber ID.
> 
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> ---
>  drivers/input/touchscreen/goodix.c | 39 ++++++++++++++----------------
>  1 file changed, 18 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
> index 0403102e807e..bfd067d7145e 100644
> --- a/drivers/input/touchscreen/goodix.c
> +++ b/drivers/input/touchscreen/goodix.c
> @@ -48,7 +48,7 @@ struct goodix_ts_data {
>  	struct regulator *vddio;
>  	struct gpio_desc *gpiod_int;
>  	struct gpio_desc *gpiod_rst;
> -	u16 id;
> +	char id[5];
>  	u16 version;
>  	const char *cfg_name;
>  	struct completion firmware_loading_complete;
> @@ -235,28 +235,25 @@ static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
>  	return goodix_i2c_write(client, reg, &value, sizeof(value));
>  }
>  
> -static const struct goodix_chip_data *goodix_get_chip_data(u16 id)
> +static const struct goodix_chip_data *goodix_get_chip_data(const char *id)
>  {
> -	switch (id) {
> -	case 1151:
> -	case 5663:
> -	case 5688:
> +	if (!strcmp(id, "1151") ||
> +	    !strcmp(id, "5663") ||
> +	    !strcmp(id, "5688"))
>  		return &gt1x_chip_data;
>  
> -	case 911:
> -	case 9271:
> -	case 9110:
> -	case 927:
> -	case 928:
> +	if (!strcmp(id, "911") ||
> +	    !strcmp(id, "9271") ||
> +	    !strcmp(id, "9110") ||
> +	    !strcmp(id, "927") ||
> +	    !strcmp(id, "928"))
>  		return &gt911_chip_data;
>  
> -	case 912:
> -	case 967:
> +	if (!strcmp(id, "912") ||
> +	    !strcmp(id, "967"))
>  		return &gt967_chip_data;
>  
> -	default:
> -		return &gt9x_chip_data;
> -	}
> +	return &gt9x_chip_data;

I wonder if with strings it would not be simpler to have a id -> pointer
mapping table and loop over it.

Thanks.

-- 
Dmitry

Re: [PATCH 1/3] dt-bindings: input: touchscreen: add compatible string for Goodix GT917S

[Rob Herring]

On Sat, Jan 11, 2020 at 12:26:06AM +0800, Icenowy Zheng wrote:
> Goodix GT917S is a new touchscreen chip from Goodix.
> 
> Add its compatible string to the device tree binding.
> 
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> ---
>  Documentation/devicetree/bindings/input/touchscreen/goodix.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt
> index fc03ea4cf5ab..c5447b136eb3 100644
> --- a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt
> +++ b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt
> @@ -8,6 +8,7 @@ Required properties:
>  				 or "goodix,gt911"
>  				 or "goodix,gt9110"
>  				 or "goodix,gt912"
> +				 or "goodix,gt917s"

This binding is getting converted to schema, so you'll probably need to 
respin. In any case,

Acked-by: Rob Herring <robh@kernel.org>

>  				 or "goodix,gt927"
>  				 or "goodix,gt9271"
>  				 or "goodix,gt928"
> -- 
> 2.23.0
>