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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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7636f090d0
There are three variants of which Huawei released the first two simultaneously. Huawei Matebook E Go LTE(sc8180x), codename seems to be gaokun2. Huawei Matebook E Go(sc8280xp@3.0GHz), codename must be gaokun3. (see [1]) Huawei Matebook E Go 2023(sc8280xp@2.69GHz), codename should be also gaokun3. Adding support for the latter two variants for now, this driver should also work for the sc8180x variant according to acpi table files, but I don't have the device to test yet. Different from other Qualcomm Snapdragon sc8280xp based machines, the Huawei Matebook E Go uses an embedded controller while others use a system called PMIC GLink. This embedded controller can be used to perform a set of various functions, including, but not limited to: - Battery and charger monitoring; - Charge control and smart charge; - Fn_lock settings; - Tablet lid status; - Temperature sensors; - USB Type-C notifications (ports orientation, DP alt mode HPD); - USB Type-C PD (according to observation, up to 48w). Add a driver for the EC which creates devices for UCSI and power supply devices. This driver is inspired by the following drivers: drivers/platform/arm64/acer-aspire1-ec.c drivers/platform/arm64/lenovo-yoga-c630.c drivers/platform/x86/huawei-wmi.c Also thanks for reviewers' working. They have made this patch improve a lot. [1] https://bugzilla.kernel.org/show_bug.cgi?id=219645 Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20250214180656.28599-3-mitltlatltl@gmail.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Huawei Matebook E Go Embedded Controller
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*
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* Copyright (C) 2024-2025 Pengyu Luo <mitltlatltl@gmail.com>
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*/
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#ifndef __HUAWEI_GAOKUN_EC_H__
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#define __HUAWEI_GAOKUN_EC_H__
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#define GAOKUN_UCSI_CCI_SIZE 4
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#define GAOKUN_UCSI_MSGI_SIZE 16
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#define GAOKUN_UCSI_READ_SIZE (GAOKUN_UCSI_CCI_SIZE + GAOKUN_UCSI_MSGI_SIZE)
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#define GAOKUN_UCSI_WRITE_SIZE 24 /* 8B CTRL, 16B MSGO */
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#define GAOKUN_UCSI_NO_PORT_UPDATE (-1)
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#define GAOKUN_SMART_CHARGE_DATA_SIZE 4 /* mode, delay, start, end */
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/* -------------------------------------------------------------------------- */
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struct gaokun_ec;
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struct gaokun_ucsi_reg;
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struct notifier_block;
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#define GAOKUN_MOD_NAME "huawei_gaokun_ec"
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#define GAOKUN_DEV_PSY "psy"
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#define GAOKUN_DEV_UCSI "ucsi"
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/* -------------------------------------------------------------------------- */
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/* Common API */
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int gaokun_ec_register_notify(struct gaokun_ec *ec,
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struct notifier_block *nb);
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void gaokun_ec_unregister_notify(struct gaokun_ec *ec,
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struct notifier_block *nb);
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int gaokun_ec_read(struct gaokun_ec *ec, const u8 *req,
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size_t resp_len, u8 *resp);
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int gaokun_ec_write(struct gaokun_ec *ec, const u8 *req);
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int gaokun_ec_read_byte(struct gaokun_ec *ec, const u8 *req, u8 *byte);
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/* -------------------------------------------------------------------------- */
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/* API for PSY */
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int gaokun_ec_psy_multi_read(struct gaokun_ec *ec, u8 reg,
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size_t resp_len, u8 *resp);
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static inline int gaokun_ec_psy_read_byte(struct gaokun_ec *ec,
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u8 reg, u8 *byte)
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{
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return gaokun_ec_psy_multi_read(ec, reg, sizeof(*byte), byte);
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}
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static inline int gaokun_ec_psy_read_word(struct gaokun_ec *ec,
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u8 reg, u16 *word)
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{
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return gaokun_ec_psy_multi_read(ec, reg, sizeof(*word), (u8 *)word);
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}
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int gaokun_ec_psy_get_smart_charge(struct gaokun_ec *ec,
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u8 resp[GAOKUN_SMART_CHARGE_DATA_SIZE]);
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int gaokun_ec_psy_set_smart_charge(struct gaokun_ec *ec,
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const u8 req[GAOKUN_SMART_CHARGE_DATA_SIZE]);
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int gaokun_ec_psy_get_smart_charge_enable(struct gaokun_ec *ec, bool *on);
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int gaokun_ec_psy_set_smart_charge_enable(struct gaokun_ec *ec, bool on);
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/* -------------------------------------------------------------------------- */
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/* API for UCSI */
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int gaokun_ec_ucsi_read(struct gaokun_ec *ec, u8 resp[GAOKUN_UCSI_READ_SIZE]);
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int gaokun_ec_ucsi_write(struct gaokun_ec *ec,
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const u8 req[GAOKUN_UCSI_WRITE_SIZE]);
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int gaokun_ec_ucsi_get_reg(struct gaokun_ec *ec, struct gaokun_ucsi_reg *ureg);
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int gaokun_ec_ucsi_pan_ack(struct gaokun_ec *ec, int port_id);
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#endif /* __HUAWEI_GAOKUN_EC_H__ */
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