adafruit-mirror/zephyr
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 9

drivers: mfd: it8801_altctrl: Add alternate controller for MFD

Browse source 
IT8801 support GPIO alternate function switching.
Some GPIO pins can be switched as KSO or PWM function.

Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
This commit is contained in:
Tim Lin 2024-09-02 18:13:20 +08:00 committed by Benjamin Cabé
parent 3de8989852
commit 70739a1e74
9 changed files with 233 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/mfd/CMakeLists.txt
View file

@ -17,3 +17,4 @@ zephyr_library_sources_ifdef(CONFIG_NXP_LP_FLEXCOMM mfd_nxp_lp_flexcomm.c)
zephyr_library_sources_ifdef(CONFIG_MFD_BD8LB600FS mfd_bd8lb600fs.c)
zephyr_library_sources_ifdef(CONFIG_MFD_TLE9104 mfd_tle9104.c)
zephyr_library_sources_ifdef(CONFIG_MFD_ITE_IT8801 mfd_ite_it8801.c)
zephyr_library_sources_ifdef(CONFIG_MFD_ITE_IT8801_ALTCTRL mfd_it8801_altctrl.c)

8
drivers/mfd/Kconfig.it8801
View file

@ -9,3 +9,11 @@ config MFD_ITE_IT8801
help
Enable the ITE IT8801 ioexpander multi-function device driver.
This ioexpander provides a GPIO/PWM/Keyboard function via I2C bus.
if MFD_ITE_IT8801
config MFD_ITE_IT8801_ALTCTRL
bool "ITE IT8801 MFD alternate controller"
default y
endif # MFD_ITE_IT8801

66
drivers/mfd/mfd_it8801_altctrl.c Normal file
View file

@ -0,0 +1,66 @@
/*
* Copyright (c) 2024 ITE Corporation. All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT ite_it8801_altctrl
#include <zephyr/drivers/i2c.h>
#include <zephyr/drivers/mfd/mfd_ite_it8801.h>
#include <zephyr/dt-bindings/mfd/mfd_it8801_altctrl.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(mfd_it8801_altctrl, LOG_LEVEL_ERR);
struct mfd_altfunc_config {
/* gpiocr register */
uint8_t reg_gpiocr;
};
int mfd_it8801_configure_pins(const struct i2c_dt_spec *i2c_dev, const struct device *dev,
uint8_t pin, uint8_t func)
{
const struct mfd_altfunc_config *config = dev->config;
int ret;
uint8_t reg_gpiocr = config->reg_gpiocr + pin;
uint8_t alt_val;
switch (func) {
case IT8801_ALT_FUNC_1:
/* Func1: Default GPIO setting */
alt_val = IT8801_GPIOAFS_FUN1;
break;
case IT8801_ALT_FUNC_2:
/* Func2: KSO or PWM setting */
alt_val = IT8801_GPIOAFS_FUN2;
break;
case IT8801_ALT_FUNC_3:
/* Func3: PWM setting */
alt_val = IT8801_GPIOAFS_FUN3;
break;
case IT8801_ALT_DEFAULT:
alt_val = IT8801_GPIOAFS_FUN1;
break;
default:
LOG_ERR("This function is not supported.");
return -EINVAL;
}
/* Common settings for alternate function. */
ret = i2c_reg_update_byte_dt(i2c_dev, reg_gpiocr, GENMASK(7, 6), alt_val << 6);
if (ret != 0) {
LOG_ERR("Failed to update gpiocr (ret %d)", ret);
return ret;
}
return 0;
}
#define MFD_IT8801_ALTCTRL_INIT(inst) \
static const struct mfd_altfunc_config it8801_mfd_alt_cfg_##inst = { \
.reg_gpiocr = DT_INST_REG_ADDR(inst), \
}; \
DEVICE_DT_INST_DEFINE(inst, NULL, NULL, NULL, &it8801_mfd_alt_cfg_##inst, POST_KERNEL, \
CONFIG_MFD_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(MFD_IT8801_ALTCTRL_INIT)

12
dts/bindings/mfd/ite,it8801-altctrl.yaml Normal file
View file

@ -0,0 +1,12 @@
# Copyright (c) 2024 ITE Corporation. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
description: ITE IT8801 GPIO controller node
compatible: "ite,it8801-altctrl"
include: base.yaml
altctrl-cells:
- pin
- alt_func

13
dts/bindings/mfd/ite,it8801-mfd-map.yaml Normal file
View file

@ -0,0 +1,13 @@
# Copyright (c) 2024 ITE Corporation. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
description: ITE IT8801 alternate controller node
compatible: "ite,it8801-mfd-map"
child-binding:
description: Child node to present the mapping of IT8801 altternate function
properties:
altctrls:
type: phandle-array
required: true

30
dts/riscv/ite/it8801-mfd-gpiocr.dtsi Normal file
View file

@ -0,0 +1,30 @@
/*
* Copyright (c) 2024 ITE Corporation. All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
/ {
it8801-mfd {
#address-cells = <1>;
#size-cells = <1>;
it8801_gpio0: gpiocr@0a {
compatible = "ite,it8801-altctrl";
reg = <0x0a 8>;
#altctrl-cells = <2>;
};
it8801_gpio1: gpiocr@12 {
compatible = "ite,it8801-altctrl";
reg = <0x12 6>;
#altctrl-cells = <2>;
};
it8801_gpio2: gpiocr@1a {
compatible = "ite,it8801-altctrl";
reg = <0x1a 4>;
#altctrl-cells = <2>;
};
};
};

56
dts/riscv/ite/it8801-mfd-map.dtsi Normal file
View file

@ -0,0 +1,56 @@
/*
* Copyright (c) 2024 ITE Corporation. All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <ite/it8801-mfd-gpiocr.dtsi>
#include <zephyr/dt-bindings/mfd/mfd_it8801_altctrl.h>
/ {
/* GPIO pin mapping to alternate function */
it8801-mfd-map {
compatible = "ite,it8801-mfd-map";
/* PWM alternate function */
pwm1_gp12_default: pwm1_gp12_default {
altctrls = <&it8801_gpio1 2 IT8801_ALT_FUNC_2>;
};
pwm2_gp13_default: pwm2_gp13_default {
altctrls = <&it8801_gpio1 3 IT8801_ALT_FUNC_2>;
};
pwm3_gp14_default: pwm3_gp14_default {
altctrls = <&it8801_gpio1 4 IT8801_ALT_FUNC_2>;
};
pwm4_gp15_default: pwm4_gp15_default {
altctrls = <&it8801_gpio1 5 IT8801_ALT_FUNC_2>;
};
pwm7_gp20_default: pwm7_gp20_default {
altctrls = <&it8801_gpio2 0 IT8801_ALT_FUNC_2>;
};
pwm8_gp23_default: pwm8_gp23_default {
altctrls = <&it8801_gpio2 3 IT8801_ALT_FUNC_3>;
};
pwm9_gp22_default: pwm9_gp22_default {
altctrls = <&it8801_gpio2 2 IT8801_ALT_FUNC_3>;
};
/* Keyboard alternate function */
kso18_gp01_default: kso18_gp01_default {
altctrls = <&it8801_gpio0 1 IT8801_ALT_FUNC_2>;
};
kso19_gp00_default: kso19_gp00_default {
altctrls = <&it8801_gpio0 0 IT8801_ALT_FUNC_2>;
};
kso20_gp23_default: kso20_gp23_default {
altctrls = <&it8801_gpio2 3 IT8801_ALT_FUNC_2>;
};
kso21_gp22_default: kso21_gp22_default {
altctrls = <&it8801_gpio2 2 IT8801_ALT_FUNC_2>;
};
kso22_gp21_default: kso22_gp21_default {
altctrls = <&it8801_gpio2 1 IT8801_ALT_FUNC_2>;
};
};
};

30
include/zephyr/drivers/mfd/mfd_ite_it8801.h
View file

@ -87,6 +87,36 @@ static const struct it8801_vendor_id_t it8801_id_verify[] = {
#define IT8801_PWMMCR_MCR_BREATHING 2
#define IT8801_PWMMCR_MCR_ON 3
/*
* For IT8801 MFD alternate function controller
*/
#define IT8801_DT_INST_MFDCTRL(inst, idx) DT_INST_PHANDLE_BY_IDX(inst, mfdctrl, idx)
#define IT8801_DT_INST_MFDCTRL_LEN(inst) DT_INST_PROP_LEN_OR(inst, mfdctrl, 0)
#define IT8801_DEV_MFD(idx, inst) \
DEVICE_DT_GET(DT_PHANDLE(IT8801_DT_INST_MFDCTRL(inst, idx), altctrls))
#define IT8801_DEV_MFD_PIN(idx, inst) DT_PHA(IT8801_DT_INST_MFDCTRL(inst, idx), altctrls, pin)
#define IT8801_DEV_MFD_FUNC(idx, inst) DT_PHA(IT8801_DT_INST_MFDCTRL(inst, idx), altctrls, alt_func)
#define IT8801_DT_MFD_ITEMS_FUNC(idx, inst) \
{ \
.gpiocr = IT8801_DEV_MFD(idx, inst), \
.pin = IT8801_DEV_MFD_PIN(idx, inst), \
.alt_func = IT8801_DEV_MFD_FUNC(idx, inst), \
}
#define IT8801_DT_MFD_ITEMS_LIST(inst) \
{LISTIFY(IT8801_DT_INST_MFDCTRL_LEN(inst), \
IT8801_DT_MFD_ITEMS_FUNC, (,), \
inst) }
/*
* Configure alternate function pin
*/
int mfd_it8801_configure_pins(const struct i2c_dt_spec *i2c_dev, const struct device *dev,
uint8_t pin, uint8_t func);
/* Define the IT8801 MFD interrupt callback function handler */
typedef void (*it8801_callback_handler_t)(const struct device *dev);

17
include/zephyr/dt-bindings/mfd/mfd_it8801_altctrl.h Normal file
View file

@ -0,0 +1,17 @@
/*
* Copyright (c) 2024 ITE Technology Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_MFD_IT8801_ALTCTRL_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_MFD_IT8801_ALTCTRL_H_
/**
* @brief PIN alternate function.
*/
#define IT8801_ALT_FUNC_1 0U
#define IT8801_ALT_FUNC_2 1U
#define IT8801_ALT_FUNC_3 2U
#define IT8801_ALT_DEFAULT 3U
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_MFD_IT8801_ALTCTRL_H_ */