[PATCH v4 2/5] soc: sophgo: sg2044: Add support for SG2044 TOP syscon device

Inochi Amaoto
2025-04-13T22:45:41Z

The SG2044 TOP device provide PLL clock function in its area.
Add a mfd definition for it.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/sophgo/Kconfig | 21 ++++++++++++++
drivers/soc/sophgo/Makefile | 3 ++
drivers/soc/sophgo/sg2044-topsys.c | 45 ++++++++++++++++++++++++++++++
5 files changed, 71 insertions(+)
create mode 100644 drivers/soc/sophgo/Kconfig
create mode 100644 drivers/soc/sophgo/Makefile
create mode 100644 drivers/soc/sophgo/sg2044-topsys.c

diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index 6a8daeb8c4b9..11e2383c0654 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -23,6 +23,7 @@ source "drivers/soc/qcom/Kconfig"
source "drivers/soc/renesas/Kconfig"
source "drivers/soc/rockchip/Kconfig"
source "drivers/soc/samsung/Kconfig"
+source "drivers/soc/sophgo/Kconfig"
source "drivers/soc/sunxi/Kconfig"
source "drivers/soc/tegra/Kconfig"
source "drivers/soc/ti/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 2037a8695cb2..0381a0abdec8 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -29,6 +29,7 @@ obj-y += qcom/
obj-y += renesas/
obj-y += rockchip/
obj-$(CONFIG_SOC_SAMSUNG) += samsung/
+obj-y += sophgo/
obj-y += sunxi/
obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-y += ti/
diff --git a/drivers/soc/sophgo/Kconfig b/drivers/soc/sophgo/Kconfig
new file mode 100644
index 000000000000..d97de4a41d5e
--- /dev/null
+++ b/drivers/soc/sophgo/Kconfig
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Sophgo SoC drivers
+#
+
+if ARCH_SOPHGO || COMPILE_TEST
+menu "Sophgo SoC drivers"
+
+config SOPHGO_SG2044_TOPSYS
+ tristate "Sophgo SG2044 TOP syscon driver"
+ select MFD_CORE
+ help
+ This is the core driver for the Sophgo SG2044 TOP system
+ controller device. This driver provide PLL clock device
+ for the SoC.
+
+ This driver can also be built as a module. If so, the module
+ will be called sg2044-topsys.
+
+endmenu
+endif
diff --git a/drivers/soc/sophgo/Makefile b/drivers/soc/sophgo/Makefile
new file mode 100644
index 000000000000..171a2922d75b
--- /dev/null
+++ b/drivers/soc/sophgo/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_SOPHGO_SG2044_TOPSYS) += sg2044-topsys.o
diff --git a/drivers/soc/sophgo/sg2044-topsys.c b/drivers/soc/sophgo/sg2044-topsys.c
new file mode 100644
index 000000000000..179f2620b2a9
--- /dev/null
+++ b/drivers/soc/sophgo/sg2044-topsys.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sophgo SG2044 multi-function system controller driver
+ *
+ * Copyright (C) 2025 Inochi Amaoto <inochiama@gmail.com>
+ */
+
+#include <linux/mfd/core.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/resource.h>
+
+static const struct mfd_cell sg2044_topsys_subdev[] = {
+ {
+ .name = "sg2044-pll",
+ },
+};
+
+static int sg2044_topsys_probe(struct platform_device *pdev)
+{
+ return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO,
+ sg2044_topsys_subdev,
+ ARRAY_SIZE(sg2044_topsys_subdev),
+ NULL, 0, NULL);
+}
+
+static const struct of_device_id sg2044_topsys_of_match[] = {
+ { .compatible = "sophgo,sg2044-top-syscon" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sg2044_topsys_of_match);
+
+static struct platform_driver sg2044_topsys_driver = {
+ .probe = sg2044_topsys_probe,
+ .driver = {
+ .name = "sg2044-topsys",
+ .of_match_table = sg2044_topsys_of_match,
+ },
+};
+module_platform_driver(sg2044_topsys_driver);
+
+MODULE_AUTHOR("Inochi Amaoto <inochiama@gmail.com>");
+MODULE_DESCRIPTION("Sophgo SG2044 multi-function system controller driver");
+MODULE_LICENSE("GPL");
--
2.49.0