| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20250309202629.3516822-3-alexander.sverdlin@gmail.com>
Date: Sun, 9 Mar 2025 21:26:24 +0100
From: Alexander Sverdlin <alexander.sverdlin@...il.com>
To: sophgo@...ts.linux.dev,
devicetree@...r.kernel.org,
linux-rtc@...r.kernel.org
Cc: Alexander Sverdlin <alexander.sverdlin@...il.com>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Chen Wang <unicorn_wang@...look.com>,
Inochi Amaoto <inochiama@...il.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Jingbao Qiu <qiujingbao.dlmu@...il.com>,
Arnd Bergmann <arnd@...db.de>,
Yangyu Chen <cyy@...self.name>,
linux-kernel@...r.kernel.org
Subject: [PATCH v13 2/3] soc: sophgo: cv1800: rtcsys: New driver (handling RTC only)
Add driver for Sophgo CV1800 series SoC RTC subsystem. The RTC module
comprises a 32kHz oscillator, Power-on-Reset (PoR) sub-module, HW state
machine to control chip power-on, power-off and reset. Furthermore, the
8051 subsystem is located within RTCSYS including associated SRAM block.
This patch only populates RTC sub-device.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...il.com>
---
Changelog:
v13:
- Moved the driver from MFD into SOC subsystem
- Dropped unused "cv1800_rtcsys_rtc_subdev"
v12:
- new patch
MAINTAINERS | 1 +
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/sophgo/Kconfig | 24 ++++++++++++
drivers/soc/sophgo/Makefile | 3 ++
drivers/soc/sophgo/cv1800-rtcsys.c | 63 ++++++++++++++++++++++++++++++
6 files changed, 93 insertions(+)
create mode 100644 drivers/soc/sophgo/Kconfig
create mode 100644 drivers/soc/sophgo/Makefile
create mode 100644 drivers/soc/sophgo/cv1800-rtcsys.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 3eee238c2ea2..ac15e448fffb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22354,6 +22354,7 @@ L: sophgo@...ts.linux.dev
W: https://github.com/sophgo/linux/wiki
T: git https://github.com/sophgo/linux.git
S: Maintained
+F: drivers/soc/sophgo/cv1800-rtcsys.c
N: sophgo
K: sophgo
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..e50666e423a9
--- /dev/null
+++ b/drivers/soc/sophgo/Kconfig
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Sophgo/Cvitek SoC drivers
+#
+
+if ARCH_SOPHGO || COMPILE_TEST
+menu "Sophgo/Cvitek SoC drivers"
+
+config SOPHGO_CV1800_RTCSYS
+ tristate "Sophgo CV1800 RTC MFD"
+ default y if COMPILE_TEST
+ select MFD_CORE
+ help
+ If you say yes here you get support the RTC MFD driver for Sophgo
+ CV1800 series SoC. The RTC module comprises a 32kHz oscillator,
+ Power-on-Reset (PoR) sub-module, HW state machine to control chip
+ power-on, power-off and reset. Furthermore, the 8051 subsystem is
+ located within RTCSYS including associated SRAM block.
+
+ This driver can also be built as a module. If so, the module will be
+ called cv1800-rtcsys.
+
+endmenu
+endif
diff --git a/drivers/soc/sophgo/Makefile b/drivers/soc/sophgo/Makefile
new file mode 100644
index 000000000000..8f22b4e79311
--- /dev/null
+++ b/drivers/soc/sophgo/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_SOPHGO_CV1800_RTCSYS) += cv1800-rtcsys.o
diff --git a/drivers/soc/sophgo/cv1800-rtcsys.c b/drivers/soc/sophgo/cv1800-rtcsys.c
new file mode 100644
index 000000000000..cb271f02afcc
--- /dev/null
+++ b/drivers/soc/sophgo/cv1800-rtcsys.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Sophgo CV1800 series SoC RTC subsystem
+ *
+ * The RTC module comprises a 32kHz oscillator, Power-on-Reset (PoR) sub-module,
+ * HW state machine to control chip power-on, power-off and reset. Furthermore,
+ * the 8051 subsystem is located within RTCSYS including associated SRAM block.
+ *
+ * Copyright (C) 2025 Alexander Sverdlin <alexander.sverdlin@...il.com>
+ *
+ */
+
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/property.h>
+
+static struct resource cv1800_rtcsys_irq_resources[] = {
+ DEFINE_RES_IRQ_NAMED(0, "alarm"),
+};
+
+static const struct mfd_cell cv1800_rtcsys_subdev[] = {
+ {
+ .name = "cv1800-rtc",
+ .num_resources = 1,
+ .resources = &cv1800_rtcsys_irq_resources[0],
+ },
+};
+
+static int cv1800_rtcsys_probe(struct platform_device *pdev)
+{
+ int irq;
+
+ irq = platform_get_irq_byname(pdev, "alarm");
+ if (irq < 0)
+ return irq;
+ cv1800_rtcsys_irq_resources[0].start = irq;
+ cv1800_rtcsys_irq_resources[0].end = irq;
+
+ return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO,
+ cv1800_rtcsys_subdev,
+ ARRAY_SIZE(cv1800_rtcsys_subdev),
+ NULL, 0, NULL);
+}
+
+static const struct of_device_id cv1800_rtcsys_of_match[] = {
+ { .compatible = "sophgo,cv1800b-rtc" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, cv1800_rtcsys_of_match);
+
+static struct platform_driver cv1800_rtcsys_mfd = {
+ .probe = cv1800_rtcsys_probe,
+ .driver = {
+ .name = "cv1800_rtcsys",
+ .of_match_table = cv1800_rtcsys_of_match,
+ },
+};
+module_platform_driver(cv1800_rtcsys_mfd);
+
+MODULE_AUTHOR("Alexander Sverdlin <alexander.sverdlin@...il.com>");
+MODULE_DESCRIPTION("Sophgo CV1800 series SoC RTC subsystem driver");
+MODULE_LICENSE("GPL");
--
2.48.1
Powered by blists - more mailing lists