Extend the novatek touchscreen driver to support NT36672A chip which
is found in phones like qcom/sdm845-xiaomi-beryllium-tianma.dts.
Added devicetree support for the driver and used i2c chip data to handle
the variation in chip id and wake type. Also added vcc and iovcc
regulators which are used to power the touchscreen hardware.
Signed-off-by: Joel Selvaraj <[email protected]>
---
Changes in v5:
- Made the chip data a local variable as it is only used during probe.
- Handle the regulator disable correctly for all exit paths in probe.
- Link to v4: https://lore.kernel.org/r/20240601-nvt-ts-devicetree-regulator-support-v4-0-e0c0174464c4@gmail.com
Changes in v4:
- Use lowercase i2c device id as suggested by Hans de Goede.
- Disable the regulators after nvt_ts_read_data during probe.
- Link to v3: https://lore.kernel.org/r/20240526-nvt-ts-devicetree-regulator-support-v3-0-aa88d10ccd9a@gmail.com
Changes in v3:
- Fix indentation in the binding as suggested by Krzysztof Kozlowski.
- Picked up Krzysztof Kozlowski's Reviewed-by tag for the binding.
- Link to v2: https://lore.kernel.org/r/20240524-nvt-ts-devicetree-regulator-support-v2-0-b74947038c44@gmail.com
Changes in v2:
- The generic i2c device id is now replaced with the correct IC variant
provided by Hans de Goede
- Updated the bindings to reflect the latest changes and also incorporated
the suggestions provided by Krzysztof Kozlowski
- Link to v1: https://lore.kernel.org/r/20240521-nvt-ts-devicetree-regulator-support-v1-0-8d766c639dca@gmail.com
---
Joel Selvaraj (3):
Input: novatek-nvt-ts: replace generic i2c device id with specific IC variant
dt-bindings: input: document Novatek NVT touchscreen controller
Input: novatek-nvt-ts: add support for NT36672A touchscreen
.../bindings/input/touchscreen/novatek,nvt-ts.yaml | 62 ++++++++++++++++++++
MAINTAINERS | 1 +
drivers/input/touchscreen/novatek-nvt-ts.c | 67 ++++++++++++++++++++--
drivers/platform/x86/x86-android-tablets/other.c | 2 +-
4 files changed, 125 insertions(+), 7 deletions(-)
---
base-commit: 6578aac6a270bd6deb9f9319b991dd430de263dd
change-id: 20240518-nvt-ts-devicetree-regulator-support-ac9e49b78a16
Best regards,
--
Joel Selvaraj <[email protected]>
From: Joel Selvaraj <[email protected]>
Extend the novatek touchscreen driver to support NT36672A chip which
is found in phones like qcom/sdm845-xiaomi-beryllium-tianma.dts.
Added devicetree support for the driver and used i2c chip data to handle
the variation in chip id and wake type. Also added vcc and iovcc
regulators which are used to power the touchscreen hardware.
Signed-off-by: Joel Selvaraj <[email protected]>
---
drivers/input/touchscreen/novatek-nvt-ts.c | 67 +++++++++++++++++++++++++++---
1 file changed, 61 insertions(+), 6 deletions(-)
diff --git a/drivers/input/touchscreen/novatek-nvt-ts.c b/drivers/input/touchscreen/novatek-nvt-ts.c
index 9bee3a0c122fb..b9ff97bf4d880 100644
--- a/drivers/input/touchscreen/novatek-nvt-ts.c
+++ b/drivers/input/touchscreen/novatek-nvt-ts.c
@@ -31,9 +31,6 @@
#define NVT_TS_PARAMS_CHIP_ID 0x0e
#define NVT_TS_PARAMS_SIZE 0x0f
-#define NVT_TS_SUPPORTED_WAKE_TYPE 0x05
-#define NVT_TS_SUPPORTED_CHIP_ID 0x05
-
#define NVT_TS_MAX_TOUCHES 10
#define NVT_TS_MAX_SIZE 4096
@@ -51,10 +48,16 @@ static const int nvt_ts_irq_type[4] = {
IRQF_TRIGGER_HIGH
};
+struct nvt_ts_i2c_chip_data {
+ u8 wake_type;
+ u8 chip_id;
+};
+
struct nvt_ts_data {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data regulators[2];
struct touchscreen_properties prop;
int max_touches;
u8 buf[NVT_TS_TOUCH_SIZE * NVT_TS_MAX_TOUCHES];
@@ -142,6 +145,13 @@ static irqreturn_t nvt_ts_irq(int irq, void *dev_id)
static int nvt_ts_start(struct input_dev *dev)
{
struct nvt_ts_data *data = input_get_drvdata(dev);
+ int error;
+
+ error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), data->regulators);
+ if (error) {
+ dev_err(&data->client->dev, "failed to enable regulators\n");
+ return error;
+ }
enable_irq(data->client->irq);
gpiod_set_value_cansleep(data->reset_gpio, 0);
@@ -155,6 +165,7 @@ static void nvt_ts_stop(struct input_dev *dev)
disable_irq(data->client->irq);
gpiod_set_value_cansleep(data->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
}
static int nvt_ts_suspend(struct device *dev)
@@ -188,6 +199,7 @@ static int nvt_ts_probe(struct i2c_client *client)
struct device *dev = &client->dev;
int error, width, height, irq_type;
struct nvt_ts_data *data;
+ const struct nvt_ts_i2c_chip_data *chip;
struct input_dev *input;
if (!client->irq) {
@@ -199,12 +211,35 @@ static int nvt_ts_probe(struct i2c_client *client)
if (!data)
return -ENOMEM;
+ chip = device_get_match_data(&client->dev);
+ if (!chip)
+ return -EINVAL;
+
data->client = client;
i2c_set_clientdata(client, data);
+ /*
+ * VCC is the analog voltage supply
+ * IOVCC is the digital voltage supply
+ */
+ data->regulators[0].supply = "vcc";
+ data->regulators[1].supply = "iovcc";
+ error = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->regulators), data->regulators);
+ if (error) {
+ dev_err(dev, "cannot get regulators: %d\n", error);
+ return error;
+ }
+
+ error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), data->regulators);
+ if (error) {
+ dev_err(dev, "failed to enable regulators: %d\n", error);
+ return error;
+ }
+
data->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
error = PTR_ERR_OR_ZERO(data->reset_gpio);
if (error) {
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
dev_err(dev, "failed to request reset GPIO: %d\n", error);
return error;
}
@@ -214,6 +249,7 @@ static int nvt_ts_probe(struct i2c_client *client)
error = nvt_ts_read_data(data->client, NVT_TS_PARAMETERS_START,
data->buf, NVT_TS_PARAMS_SIZE);
gpiod_set_value_cansleep(data->reset_gpio, 1); /* Put back in reset */
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
if (error)
return error;
@@ -225,8 +261,8 @@ static int nvt_ts_probe(struct i2c_client *client)
if (width > NVT_TS_MAX_SIZE || height >= NVT_TS_MAX_SIZE ||
data->max_touches > NVT_TS_MAX_TOUCHES ||
irq_type >= ARRAY_SIZE(nvt_ts_irq_type) ||
- data->buf[NVT_TS_PARAMS_WAKE_TYPE] != NVT_TS_SUPPORTED_WAKE_TYPE ||
- data->buf[NVT_TS_PARAMS_CHIP_ID] != NVT_TS_SUPPORTED_CHIP_ID) {
+ data->buf[NVT_TS_PARAMS_WAKE_TYPE] != chip->wake_type ||
+ data->buf[NVT_TS_PARAMS_CHIP_ID] != chip->chip_id) {
dev_err(dev, "Unsupported touchscreen parameters: %*ph\n",
NVT_TS_PARAMS_SIZE, data->buf);
return -EIO;
@@ -277,8 +313,26 @@ static int nvt_ts_probe(struct i2c_client *client)
return 0;
}
+static const struct nvt_ts_i2c_chip_data nvt_nt11205_ts_data = {
+ .wake_type = 0x05,
+ .chip_id = 0x05,
+};
+
+static const struct nvt_ts_i2c_chip_data nvt_nt36672a_ts_data = {
+ .wake_type = 0x01,
+ .chip_id = 0x08,
+};
+
+static const struct of_device_id nvt_ts_of_match[] = {
+ { .compatible = "novatek,nt11205-ts", .data = &nvt_nt11205_ts_data },
+ { .compatible = "novatek,nt36672a-ts", .data = &nvt_nt36672a_ts_data },
+ { }
+};
+MODULE_DEVICE_TABLE(of, nvt_ts_of_match);
+
static const struct i2c_device_id nvt_ts_i2c_id[] = {
- { "nt11205-ts" },
+ { "nt11205-ts", (unsigned long) &nvt_nt11205_ts_data },
+ { "nt36672a-ts", (unsigned long) &nvt_nt36672a_ts_data },
{ }
};
MODULE_DEVICE_TABLE(i2c, nvt_ts_i2c_id);
@@ -287,6 +341,7 @@ static struct i2c_driver nvt_ts_driver = {
.driver = {
.name = "novatek-nvt-ts",
.pm = pm_sleep_ptr(&nvt_ts_pm_ops),
+ .of_match_table = nvt_ts_of_match,
},
.probe = nvt_ts_probe,
.id_table = nvt_ts_i2c_id,
--
2.45.1
From: Joel Selvaraj <[email protected]>
Document the Novatek NVT touchscreen controller present in devices like
qcom/sdm845-xiaomi-beryllium-tianma.dts. Also, include the devictree
binding file in the MAINTAINERS file.
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Joel Selvaraj <[email protected]>
---
.../bindings/input/touchscreen/novatek,nvt-ts.yaml | 62 ++++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 63 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/touchscreen/novatek,nvt-ts.yaml b/Documentation/devicetree/bindings/input/touchscreen/novatek,nvt-ts.yaml
new file mode 100644
index 0000000000000..bd6a60486d1f1
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/novatek,nvt-ts.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/novatek,nvt-ts.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Novatek NVT Touchscreen Controller
+
+maintainers:
+ - Hans de Goede <[email protected]>
+
+allOf:
+ - $ref: touchscreen.yaml#
+
+properties:
+ compatible:
+ enum:
+ - novatek,nt11205-ts
+ - novatek,nt36672a-ts
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ reset-gpios:
+ maxItems: 1
+
+ vcc-supply: true
+ iovcc-supply: true
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ touchscreen@1 {
+ compatible = "novatek,nt36672a-ts";
+ reg = <0x01>;
+ interrupts-extended = <&tlmm 31 IRQ_TYPE_EDGE_RISING>;
+ reset-gpios = <&tlmm 32 GPIO_ACTIVE_LOW>;
+ vcc-supply = <&vreg_l22a_2p85>;
+ iovcc-supply = <&vreg_l14a_1p8>;
+ pinctrl-0 = <&ts_int_default &ts_reset_default>;
+ pinctrl-1 = <&ts_int_sleep &ts_reset_sleep>;
+ pinctrl-names = "default", "sleep";
+ touchscreen-size-x = <1080>;
+ touchscreen-size-y = <2246>;
+ };
+ };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 90754a451bcfc..e1f744992b15f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15942,6 +15942,7 @@ NOVATEK NVT-TS I2C TOUCHSCREEN DRIVER
M: Hans de Goede <[email protected]>
L: [email protected]
S: Maintained
+F: Documentation/devicetree/bindings/input/touchscreen/novatek,nvt-ts.yaml
F: drivers/input/touchscreen/novatek-nvt-ts.c
NSDEPS
--
2.45.1
Hi,
On 6/1/24 10:44 PM, Joel Selvaraj via B4 Relay wrote:
> From: Joel Selvaraj <[email protected]>
>
> Extend the novatek touchscreen driver to support NT36672A chip which
> is found in phones like qcom/sdm845-xiaomi-beryllium-tianma.dts.
> Added devicetree support for the driver and used i2c chip data to handle
> the variation in chip id and wake type. Also added vcc and iovcc
> regulators which are used to power the touchscreen hardware.
>
> Signed-off-by: Joel Selvaraj <[email protected]>
Thanks, patch looks good to me:
Reviewed-by: Hans de Goede <[email protected]>
Regards,
Hans
> ---
> drivers/input/touchscreen/novatek-nvt-ts.c | 67 +++++++++++++++++++++++++++---
> 1 file changed, 61 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/input/touchscreen/novatek-nvt-ts.c b/drivers/input/touchscreen/novatek-nvt-ts.c
> index 9bee3a0c122fb..b9ff97bf4d880 100644
> --- a/drivers/input/touchscreen/novatek-nvt-ts.c
> +++ b/drivers/input/touchscreen/novatek-nvt-ts.c
> @@ -31,9 +31,6 @@
> #define NVT_TS_PARAMS_CHIP_ID 0x0e
> #define NVT_TS_PARAMS_SIZE 0x0f
>
> -#define NVT_TS_SUPPORTED_WAKE_TYPE 0x05
> -#define NVT_TS_SUPPORTED_CHIP_ID 0x05
> -
> #define NVT_TS_MAX_TOUCHES 10
> #define NVT_TS_MAX_SIZE 4096
>
> @@ -51,10 +48,16 @@ static const int nvt_ts_irq_type[4] = {
> IRQF_TRIGGER_HIGH
> };
>
> +struct nvt_ts_i2c_chip_data {
> + u8 wake_type;
> + u8 chip_id;
> +};
> +
> struct nvt_ts_data {
> struct i2c_client *client;
> struct input_dev *input;
> struct gpio_desc *reset_gpio;
> + struct regulator_bulk_data regulators[2];
> struct touchscreen_properties prop;
> int max_touches;
> u8 buf[NVT_TS_TOUCH_SIZE * NVT_TS_MAX_TOUCHES];
> @@ -142,6 +145,13 @@ static irqreturn_t nvt_ts_irq(int irq, void *dev_id)
> static int nvt_ts_start(struct input_dev *dev)
> {
> struct nvt_ts_data *data = input_get_drvdata(dev);
> + int error;
> +
> + error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), data->regulators);
> + if (error) {
> + dev_err(&data->client->dev, "failed to enable regulators\n");
> + return error;
> + }
>
> enable_irq(data->client->irq);
> gpiod_set_value_cansleep(data->reset_gpio, 0);
> @@ -155,6 +165,7 @@ static void nvt_ts_stop(struct input_dev *dev)
>
> disable_irq(data->client->irq);
> gpiod_set_value_cansleep(data->reset_gpio, 1);
> + regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
> }
>
> static int nvt_ts_suspend(struct device *dev)
> @@ -188,6 +199,7 @@ static int nvt_ts_probe(struct i2c_client *client)
> struct device *dev = &client->dev;
> int error, width, height, irq_type;
> struct nvt_ts_data *data;
> + const struct nvt_ts_i2c_chip_data *chip;
> struct input_dev *input;
>
> if (!client->irq) {
> @@ -199,12 +211,35 @@ static int nvt_ts_probe(struct i2c_client *client)
> if (!data)
> return -ENOMEM;
>
> + chip = device_get_match_data(&client->dev);
> + if (!chip)
> + return -EINVAL;
> +
> data->client = client;
> i2c_set_clientdata(client, data);
>
> + /*
> + * VCC is the analog voltage supply
> + * IOVCC is the digital voltage supply
> + */
> + data->regulators[0].supply = "vcc";
> + data->regulators[1].supply = "iovcc";
> + error = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->regulators), data->regulators);
> + if (error) {
> + dev_err(dev, "cannot get regulators: %d\n", error);
> + return error;
> + }
> +
> + error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), data->regulators);
> + if (error) {
> + dev_err(dev, "failed to enable regulators: %d\n", error);
> + return error;
> + }
> +
> data->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> error = PTR_ERR_OR_ZERO(data->reset_gpio);
> if (error) {
> + regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
> dev_err(dev, "failed to request reset GPIO: %d\n", error);
> return error;
> }
> @@ -214,6 +249,7 @@ static int nvt_ts_probe(struct i2c_client *client)
> error = nvt_ts_read_data(data->client, NVT_TS_PARAMETERS_START,
> data->buf, NVT_TS_PARAMS_SIZE);
> gpiod_set_value_cansleep(data->reset_gpio, 1); /* Put back in reset */
> + regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
> if (error)
> return error;
>
> @@ -225,8 +261,8 @@ static int nvt_ts_probe(struct i2c_client *client)
> if (width > NVT_TS_MAX_SIZE || height >= NVT_TS_MAX_SIZE ||
> data->max_touches > NVT_TS_MAX_TOUCHES ||
> irq_type >= ARRAY_SIZE(nvt_ts_irq_type) ||
> - data->buf[NVT_TS_PARAMS_WAKE_TYPE] != NVT_TS_SUPPORTED_WAKE_TYPE ||
> - data->buf[NVT_TS_PARAMS_CHIP_ID] != NVT_TS_SUPPORTED_CHIP_ID) {
> + data->buf[NVT_TS_PARAMS_WAKE_TYPE] != chip->wake_type ||
> + data->buf[NVT_TS_PARAMS_CHIP_ID] != chip->chip_id) {
> dev_err(dev, "Unsupported touchscreen parameters: %*ph\n",
> NVT_TS_PARAMS_SIZE, data->buf);
> return -EIO;
> @@ -277,8 +313,26 @@ static int nvt_ts_probe(struct i2c_client *client)
> return 0;
> }
>
> +static const struct nvt_ts_i2c_chip_data nvt_nt11205_ts_data = {
> + .wake_type = 0x05,
> + .chip_id = 0x05,
> +};
> +
> +static const struct nvt_ts_i2c_chip_data nvt_nt36672a_ts_data = {
> + .wake_type = 0x01,
> + .chip_id = 0x08,
> +};
> +
> +static const struct of_device_id nvt_ts_of_match[] = {
> + { .compatible = "novatek,nt11205-ts", .data = &nvt_nt11205_ts_data },
> + { .compatible = "novatek,nt36672a-ts", .data = &nvt_nt36672a_ts_data },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, nvt_ts_of_match);
> +
> static const struct i2c_device_id nvt_ts_i2c_id[] = {
> - { "nt11205-ts" },
> + { "nt11205-ts", (unsigned long) &nvt_nt11205_ts_data },
> + { "nt36672a-ts", (unsigned long) &nvt_nt36672a_ts_data },
> { }
> };
> MODULE_DEVICE_TABLE(i2c, nvt_ts_i2c_id);
> @@ -287,6 +341,7 @@ static struct i2c_driver nvt_ts_driver = {
> .driver = {
> .name = "novatek-nvt-ts",
> .pm = pm_sleep_ptr(&nvt_ts_pm_ops),
> + .of_match_table = nvt_ts_of_match,
> },
> .probe = nvt_ts_probe,
> .id_table = nvt_ts_i2c_id,
>