File 0007-surface-sam.patch of Package linux-surface
From 487f40f72255d0ac23f35612c40812869b97f2c1 Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Fri, 17 Jun 2022 02:14:00 +0200
Subject: [PATCH] rtc: Add basic support for RTC via Surface System Aggregator
Module
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Patchset: surface-sam
---
drivers/rtc/Kconfig | 7 +++
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-surface.c | 129 ++++++++++++++++++++++++++++++++++++++
3 files changed, 137 insertions(+)
create mode 100644 drivers/rtc/rtc-surface.c
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 64f6e9756aff..bf05361f7f13 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1379,6 +1379,13 @@ config RTC_DRV_NTXEC
embedded controller found in certain e-book readers designed by the
original design manufacturer Netronix.
+config RTC_DRV_SURFACE
+ tristate "Microsoft Surface Aggregator RTC"
+ depends on SURFACE_AGGREGATOR
+ depends on SURFACE_AGGREGATOR_BUS
+ help
+ TODO
+
comment "on-CPU RTC drivers"
config RTC_DRV_ASM9260
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 789bddfea99d..a6df07332080 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -181,6 +181,7 @@ obj-$(CONFIG_RTC_DRV_SUN4V) += rtc-sun4v.o
obj-$(CONFIG_RTC_DRV_SUN6I) += rtc-sun6i.o
obj-$(CONFIG_RTC_DRV_SUNPLUS) += rtc-sunplus.o
obj-$(CONFIG_RTC_DRV_SUNXI) += rtc-sunxi.o
+obj-$(CONFIG_RTC_DRV_SURFACE) += rtc-surface.o
obj-$(CONFIG_RTC_DRV_TEGRA) += rtc-tegra.o
obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
obj-$(CONFIG_RTC_DRV_TI_K3) += rtc-ti-k3.o
diff --git a/drivers/rtc/rtc-surface.c b/drivers/rtc/rtc-surface.c
new file mode 100644
index 000000000000..f6c17c4e98d5
--- /dev/null
+++ b/drivers/rtc/rtc-surface.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AC driver for 7th-generation Microsoft Surface devices via Surface System
+ * Aggregator Module (SSAM).
+ *
+ * Copyright (C) 2019-2021 Maximilian Luz <luzmaximilian@gmail.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/rtc.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <linux/surface_aggregator/device.h>
+
+struct surface_rtc {
+ struct ssam_device *sdev;
+ struct rtc_device *rtc;
+};
+
+SSAM_DEFINE_SYNC_REQUEST_R(__ssam_rtc_get_unix_time, __le32, {
+ .target_category = SSAM_SSH_TC_SAM,
+ .target_id = SSAM_SSH_TID_SAM,
+ .instance_id = 0x00,
+ .command_id = 0x10,
+});
+
+SSAM_DEFINE_SYNC_REQUEST_W(__ssam_rtc_set_unix_time, __le32, {
+ .target_category = SSAM_SSH_TC_SAM,
+ .target_id = SSAM_SSH_TID_SAM,
+ .instance_id = 0x00,
+ .command_id = 0x0f,
+});
+
+static int ssam_rtc_get_unix_time(struct surface_rtc *srtc, u32 *time)
+{
+ __le32 time_le;
+ int status;
+
+ status = __ssam_rtc_get_unix_time(srtc->sdev->ctrl, &time_le);
+ if (status)
+ return status;
+
+ *time = le32_to_cpu(time_le);
+ return 0;
+}
+
+static int ssam_rtc_set_unix_time(struct surface_rtc *srtc, u32 time)
+{
+ __le32 time_le = cpu_to_le32(time);
+
+ return __ssam_rtc_set_unix_time(srtc->sdev->ctrl, &time_le);
+}
+
+static int surface_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct surface_rtc *srtc = dev_get_drvdata(dev);
+ int status;
+ u32 time;
+
+ status = ssam_rtc_get_unix_time(srtc, &time);
+ if (status)
+ return status;
+
+ rtc_time64_to_tm(time, tm);
+ return 0;
+}
+
+static int surface_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct surface_rtc *srtc = dev_get_drvdata(dev);
+ time64_t time = rtc_tm_to_time64(tm);
+
+ return ssam_rtc_set_unix_time(srtc, (u32)time);
+}
+
+static const struct rtc_class_ops surface_rtc_ops = {
+ .read_time = surface_rtc_read_time,
+ .set_time = surface_rtc_set_time,
+};
+
+static int surface_rtc_probe(struct ssam_device *sdev)
+{
+ struct surface_rtc *srtc;
+
+ srtc = devm_kzalloc(&sdev->dev, sizeof(*srtc), GFP_KERNEL);
+ if (!srtc)
+ return -ENOMEM;
+
+ srtc->sdev = sdev;
+
+ srtc->rtc = devm_rtc_allocate_device(&sdev->dev);
+ if (IS_ERR(srtc->rtc))
+ return PTR_ERR(srtc->rtc);
+
+ srtc->rtc->ops = &surface_rtc_ops;
+ srtc->rtc->range_max = U32_MAX;
+
+ ssam_device_set_drvdata(sdev, srtc);
+
+ return devm_rtc_register_device(srtc->rtc);
+}
+
+static void surface_rtc_remove(struct ssam_device *sdev)
+{
+ /* Device-managed allocations take care of everything... */
+}
+
+static const struct ssam_device_id surface_rtc_match[] = {
+ { SSAM_SDEV(SAM, SAM, 0x00, 0x00) },
+ { },
+};
+MODULE_DEVICE_TABLE(ssam, surface_rtc_match);
+
+static struct ssam_device_driver surface_rtc_driver = {
+ .probe = surface_rtc_probe,
+ .remove = surface_rtc_remove,
+ .match_table = surface_rtc_match,
+ .driver = {
+ .name = "surface_rtc",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ },
+};
+module_ssam_device_driver(surface_rtc_driver);
+
+MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");
+MODULE_DESCRIPTION("RTC driver for Surface System Aggregator Module");
+MODULE_LICENSE("GPL");
--
2.51.0
From 9977281edd9310d64900a4d4c1709823019b9a47 Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Sun, 20 Apr 2025 01:05:14 +0200
Subject: [PATCH] platform/surface: aggregator_registry: Add Surface Laptop 7
(ACPI)
Patchset: surface-sam
---
drivers/platform/surface/surface_aggregator_registry.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/platform/surface/surface_aggregator_registry.c b/drivers/platform/surface/surface_aggregator_registry.c
index a594d5fcfcfd..07b03aa4fa7f 100644
--- a/drivers/platform/surface/surface_aggregator_registry.c
+++ b/drivers/platform/surface/surface_aggregator_registry.c
@@ -460,6 +460,9 @@ static const struct acpi_device_id ssam_platform_hub_acpi_match[] = {
/* Surface Laptop 6 */
{ "MSHW0530", (unsigned long)ssam_node_group_sl6 },
+ /* Surface Laptop 7 */
+ { "MSHW0551", (unsigned long)ssam_node_group_sl7 },
+
/* Surface Laptop Go 1 */
{ "MSHW0118", (unsigned long)ssam_node_group_slg1 },
--
2.51.0
