UBUNTU: ODM: gpio: add driver for AAEON devices
BugLink: https://bugs.launchpad.net/bugs/1929504 This patch add support for the GPIO pins whose control are transported to BIOS through ASUS WMI interface. Signed-off-by: Kunyang_Fan <kunyang_fan@asus.com> Review-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Review-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com> Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com> Acked-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com> Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
This commit is contained in:
Kunyang_Fan
committed by
Paolo Pisati
Paolo Pisati
parent
0cf5311691
commit
93d1e6cb39
@@ -1586,6 +1586,18 @@ endmenu
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menu "PCI GPIO expanders"
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depends on PCI
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config GPIO_AAEON
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tristate "AAEON GPIO support"
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depends on ASUS_WMI
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depends on UBUNTU_ODM_DRIVERS
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select MFD_AAEON
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help
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Say yes here to support GPIO pins on Single Board Computers produced
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by AAEON.
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This driver leverages the ASUS WMI interface to access device
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resources.
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config GPIO_AMD8111
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tristate "AMD 8111 GPIO driver"
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depends on X86 || COMPILE_TEST
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@@ -24,6 +24,7 @@ obj-$(CONFIG_GPIO_104_IDI_48) += gpio-104-idi-48.o
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obj-$(CONFIG_GPIO_104_IDIO_16) += gpio-104-idio-16.o
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obj-$(CONFIG_GPIO_74X164) += gpio-74x164.o
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obj-$(CONFIG_GPIO_74XX_MMIO) += gpio-74xx-mmio.o
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obj-$(CONFIG_GPIO_AAEON) += gpio-aaeon.o
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obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o
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obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o
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obj-$(CONFIG_GPIO_AGGREGATOR) += gpio-aggregator.o
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@@ -0,0 +1,205 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* AAEON GPIO driver
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* Copyright (c) 2021, AAEON Ltd.
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*
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* Author: Edward Lin <edward1_lin@aaeon.com.tw>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/acpi.h>
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#include <linux/bitops.h>
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#include <linux/gpio/driver.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/platform_data/x86/asus-wmi.h>
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#include <linux/platform_device.h>
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#define DRVNAME "gpio_aaeon"
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#define ASUS_NB_WMI_EVENT_GUID "0B3CBB35-E3C2-45ED-91C2-4C5A6D195D1C"
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#define AAEON_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
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#define GET_GPIO_NUMBER_ID 0x00010000
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#define GET_LEVEL_METHOD_ID 0x00010001
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#define SET_LEVEL_METHOD_ID 0x00010002
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#define GET_DIRECTION_METHOD_ID 0x00010003
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#define SET_DIRECTION_METHOD_ID 0x00010004
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#define GET_SIO_NUMBER_METHOD_ID 0xF0010
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struct aaeon_gpio_bank {
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struct gpio_chip chip;
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unsigned int regbase;
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struct aaeon_gpio_data *data;
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};
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struct aaeon_gpio_data {
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int nr_bank;
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struct aaeon_gpio_bank *bank;
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};
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static int aaeon_gpio_get_number(void);
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static int aaeon_gpio_get_direction(struct gpio_chip *chip,
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unsigned int offset);
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static int aaeon_gpio_output_set_direction(struct gpio_chip *chip,
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unsigned int offset, int value);
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static int aaeon_gpio_input_set_direction(struct gpio_chip *chip,
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unsigned int offset);
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static int aaeon_gpio_get(struct gpio_chip *chip,
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unsigned int offset);
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static void aaeon_gpio_set(struct gpio_chip *chip, unsigned int offset,
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int value);
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#define AAEON_GPIO_BANK(_base, _ngpio, _regbase) \
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{ \
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.chip = { \
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.label = DRVNAME, \
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.owner = THIS_MODULE, \
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.get_direction = aaeon_gpio_get_direction, \
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.direction_input = aaeon_gpio_input_set_direction, \
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.direction_output = aaeon_gpio_output_set_direction, \
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.get = aaeon_gpio_get, \
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.set = aaeon_gpio_set, \
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.base = _base, \
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.ngpio = _ngpio, \
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.can_sleep = true, \
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}, \
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.regbase = _regbase, \
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}
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static struct aaeon_gpio_bank aaeon_gpio_bank[] = {
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AAEON_GPIO_BANK(0, 0, 0xF0),
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};
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static int aaeon_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
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{
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int err, retval;
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u32 dev_id = 0x0;
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dev_id |= offset;
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err = asus_wmi_evaluate_method(GET_DIRECTION_METHOD_ID, dev_id,
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0, &retval);
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if (err)
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return err;
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return retval;
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}
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static int aaeon_gpio_input_set_direction(struct gpio_chip *chip,
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unsigned int offset)
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{
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int err, retval;
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u32 dev_id;
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dev_id = BIT(16) | offset;
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err = asus_wmi_evaluate_method(SET_DIRECTION_METHOD_ID, dev_id,
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0, &retval);
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if (err)
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return err;
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return retval;
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}
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static int aaeon_gpio_output_set_direction(struct gpio_chip *chip,
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unsigned int offset, int value)
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{
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int err, retval;
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u32 dev_id = 0x0;
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dev_id |= offset;
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err = asus_wmi_evaluate_method(SET_DIRECTION_METHOD_ID, dev_id,
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0, &retval);
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if (err)
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return err;
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return retval;
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}
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static int aaeon_gpio_get(struct gpio_chip *chip, unsigned int offset)
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{
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int err, retval;
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u32 dev_id = 0x0;
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dev_id |= offset;
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err = asus_wmi_evaluate_method(GET_LEVEL_METHOD_ID, dev_id, 0, &retval);
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if (err)
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return err;
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return retval;
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}
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static void aaeon_gpio_set(struct gpio_chip *chip, unsigned int offset,
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int value)
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{
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int retval;
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u32 dev_id = offset;
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if (value)
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dev_id = BIT(16) | dev_id;
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asus_wmi_evaluate_method(SET_LEVEL_METHOD_ID, dev_id, 0, &retval);
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}
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static int aaeon_gpio_get_number(void)
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{
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int err, retval;
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err = asus_wmi_evaluate_method(GET_GPIO_NUMBER_ID,
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GET_SIO_NUMBER_METHOD_ID,
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0, &retval);
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if (err)
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return err;
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return retval;
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}
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static int __init aaeon_gpio_probe(struct platform_device *pdev)
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{
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int err, i;
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int dio_number = 0;
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struct aaeon_gpio_data *data;
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struct aaeon_gpio_bank *bank;
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/* Prevent other drivers adding this platfom device */
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if (!wmi_has_guid(AAEON_WMI_MGMT_GUID)) {
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pr_debug("AAEON Management GUID not found\n");
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return -ENODEV;
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}
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dio_number = aaeon_gpio_get_number();
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if (dio_number < 0)
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return -ENODEV;
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->nr_bank = ARRAY_SIZE(aaeon_gpio_bank);
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data->bank = aaeon_gpio_bank;
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platform_set_drvdata(pdev, data);
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bank = &data->bank[0];
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bank->chip.parent = &pdev->dev;
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bank->chip.ngpio = dio_number;
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bank->data = data;
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err = devm_gpiochip_add_data(&pdev->dev, &bank->chip, bank);
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if (err)
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pr_debug("Failed to register gpiochip %d: %d\n", i, err);
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return err;
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}
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static struct platform_driver aaeon_gpio_driver = {
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.driver = {
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.name = "gpio-aaeon",
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},
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};
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module_platform_driver_probe(aaeon_gpio_driver, aaeon_gpio_probe);
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MODULE_ALIAS("platform:gpio-aaeon");
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MODULE_DESCRIPTION("AAEON GPIO Driver");
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MODULE_AUTHOR("Edward Lin <edward1_lin@aaeon.com.tw>");
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MODULE_LICENSE("GPL v2");
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