2024-12-10 06:44:25 +03:00
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From 2f8a2543aa33103cf237853d5f2ca8999261dd0d Mon Sep 17 00:00:00 2001
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2024-10-29 05:12:06 +03:00
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From: Andrey Smirnov <andrew.smirnov@gmail.com>
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Date: Sun, 24 Sep 2023 15:02:33 -0700
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Subject: [PATCH 6/6] mfd: steamdeck: Expose controller board power in sysfs
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As of version 118 Deck's BIOS implements "SCBP" method that allows
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gating power of the controller board (VBUS). Add a basic WO method to
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our root MFD device to allow toggling that.
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Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
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(cherry picked from commit f97f32718acc10cbb51fef925842392e80904d74)
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Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
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Signed-off-by: Alexandre Frade <kernel@xanmod.org>
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---
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drivers/mfd/steamdeck.c | 20 ++++++++++++++++++++
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1 file changed, 20 insertions(+)
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--- a/drivers/mfd/steamdeck.c
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+++ b/drivers/mfd/steamdeck.c
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@@ -41,9 +41,29 @@ struct steamdeck {
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STEAMDECK_ATTR_RO(firmware_version, "PDFW");
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STEAMDECK_ATTR_RO(board_id, "BOID");
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+static ssize_t controller_board_power_store(struct device *dev,
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+ struct device_attribute *attr,
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+ const char *buf, size_t count)
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+{
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+ struct steamdeck *sd = dev_get_drvdata(dev);
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+ bool enabled;
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+ ssize_t ret = kstrtobool(buf, &enabled);
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+
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+ if (ret)
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+ return ret;
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+
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+ if (ACPI_FAILURE(acpi_execute_simple_method(sd->adev->handle,
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+ "SCBP", enabled)))
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+ return -EIO;
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+
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+ return count;
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+}
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+static DEVICE_ATTR_WO(controller_board_power);
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+
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static struct attribute *steamdeck_attrs[] = {
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&dev_attr_firmware_version.attr,
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&dev_attr_board_id.attr,
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+ &dev_attr_controller_board_power.attr,
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NULL
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};
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