Merge branch 'for-6.6/elan' into for-linus

Make use of panel follower for the Ilitek ili9882t
driver by Cong Yang
This commit is contained in:
Benjamin Tissoires 2023-08-31 10:38:51 +02:00
commit 1e5d726003
2 changed files with 105 additions and 12 deletions

View File

@ -0,0 +1,67 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/ilitek,ili9882t.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Ilitek ili9882t touchscreen controller
maintainers:
- Cong Yang <yangcong5@huaqin.corp-partner.google.com>
description:
Supports the Ilitek ili9882t touchscreen controller.
This touchscreen controller uses the i2c-hid protocol with a reset GPIO.
allOf:
- $ref: /schemas/input/touchscreen/touchscreen.yaml#
properties:
compatible:
const: ilitek,ili9882t
reg:
const: 0x41
interrupts:
maxItems: 1
panel: true
reset-gpios:
maxItems: 1
description: Reset GPIO.
vccio-supply:
description: The 1.8V supply to the touchscreen.
required:
- compatible
- reg
- interrupts
- panel
- vccio-supply
additionalProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
touchscreen: touchscreen@41 {
compatible = "ilitek,ili9882t";
reg = <0x41>;
interrupt-parent = <&pio>;
interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
panel = <&panel>;
reset-gpios = <&pio 60 GPIO_ACTIVE_LOW>;
vccio-supply = <&mt6366_vio18_reg>;
};
};

View File

@ -18,9 +18,11 @@
#include "i2c-hid.h"
struct elan_i2c_hid_chip_data {
unsigned int post_gpio_reset_delay_ms;
unsigned int post_gpio_reset_on_delay_ms;
unsigned int post_gpio_reset_off_delay_ms;
unsigned int post_power_delay_ms;
u16 hid_descriptor_address;
const char *main_supply_name;
};
struct i2c_hid_of_elan {
@ -38,9 +40,11 @@ static int elan_i2c_hid_power_up(struct i2chid_ops *ops)
container_of(ops, struct i2c_hid_of_elan, ops);
int ret;
ret = regulator_enable(ihid_elan->vcc33);
if (ret)
return ret;
if (ihid_elan->vcc33) {
ret = regulator_enable(ihid_elan->vcc33);
if (ret)
return ret;
}
ret = regulator_enable(ihid_elan->vccio);
if (ret) {
@ -52,8 +56,8 @@ static int elan_i2c_hid_power_up(struct i2chid_ops *ops)
msleep(ihid_elan->chip_data->post_power_delay_ms);
gpiod_set_value_cansleep(ihid_elan->reset_gpio, 0);
if (ihid_elan->chip_data->post_gpio_reset_delay_ms)
msleep(ihid_elan->chip_data->post_gpio_reset_delay_ms);
if (ihid_elan->chip_data->post_gpio_reset_on_delay_ms)
msleep(ihid_elan->chip_data->post_gpio_reset_on_delay_ms);
return 0;
}
@ -64,8 +68,12 @@ static void elan_i2c_hid_power_down(struct i2chid_ops *ops)
container_of(ops, struct i2c_hid_of_elan, ops);
gpiod_set_value_cansleep(ihid_elan->reset_gpio, 1);
if (ihid_elan->chip_data->post_gpio_reset_off_delay_ms)
msleep(ihid_elan->chip_data->post_gpio_reset_off_delay_ms);
regulator_disable(ihid_elan->vccio);
regulator_disable(ihid_elan->vcc33);
if (ihid_elan->vcc33)
regulator_disable(ihid_elan->vcc33);
}
static int i2c_hid_of_elan_probe(struct i2c_client *client)
@ -89,24 +97,42 @@ static int i2c_hid_of_elan_probe(struct i2c_client *client)
if (IS_ERR(ihid_elan->vccio))
return PTR_ERR(ihid_elan->vccio);
ihid_elan->vcc33 = devm_regulator_get(&client->dev, "vcc33");
if (IS_ERR(ihid_elan->vcc33))
return PTR_ERR(ihid_elan->vcc33);
ihid_elan->chip_data = device_get_match_data(&client->dev);
if (ihid_elan->chip_data->main_supply_name) {
ihid_elan->vcc33 = devm_regulator_get(&client->dev,
ihid_elan->chip_data->main_supply_name);
if (IS_ERR(ihid_elan->vcc33))
return PTR_ERR(ihid_elan->vcc33);
}
return i2c_hid_core_probe(client, &ihid_elan->ops,
ihid_elan->chip_data->hid_descriptor_address, 0);
}
static const struct elan_i2c_hid_chip_data elan_ekth6915_chip_data = {
.post_power_delay_ms = 1,
.post_gpio_reset_delay_ms = 300,
.post_gpio_reset_on_delay_ms = 300,
.hid_descriptor_address = 0x0001,
.main_supply_name = "vcc33",
};
static const struct elan_i2c_hid_chip_data ilitek_ili9882t_chip_data = {
.post_power_delay_ms = 1,
.post_gpio_reset_on_delay_ms = 200,
.post_gpio_reset_off_delay_ms = 65,
.hid_descriptor_address = 0x0001,
/*
* this touchscreen is tightly integrated with the panel and assumes
* that the relevant power rails (other than the IO rail) have already
* been turned on by the panel driver because we're a panel follower.
*/
.main_supply_name = NULL,
};
static const struct of_device_id elan_i2c_hid_of_match[] = {
{ .compatible = "elan,ekth6915", .data = &elan_ekth6915_chip_data },
{ .compatible = "ilitek,ili9882t", .data = &ilitek_ili9882t_chip_data },
{ }
};
MODULE_DEVICE_TABLE(of, elan_i2c_hid_of_match);