linux-kernel - [PATCH 5/6] misc/pvpanic: add pvpanic mmio driver

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Date:   Tue, 22 Jan 2019 03:25:10 +0800
From:   Peng Hao <peng.hao2@....com.cn>
To:     gregkh@...uxfoundation.org, arnd@...db.de,
        andy.shevchenko@...il.com
Cc:     linux-kernel@...r.kernel.org, Peng Hao <peng.hao2@....com.cn>
Subject: [PATCH 5/6]  misc/pvpanic: add pvpanic mmio driver

Add pvpanic mmio driver to pvpanic driver framework.

Signed-off-by: Peng Hao <peng.hao2@....com.cn>
---
 drivers/misc/pvpanic/Kconfig      |  4 +++
 drivers/misc/pvpanic/Makefile     |  1 +
 drivers/misc/pvpanic/pvpanic-of.c | 53 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 drivers/misc/pvpanic/pvpanic-of.c

diff --git a/drivers/misc/pvpanic/Kconfig b/drivers/misc/pvpanic/Kconfig
index d274130..47f8709 100644
--- a/drivers/misc/pvpanic/Kconfig
+++ b/drivers/misc/pvpanic/Kconfig
@@ -13,4 +13,8 @@ config PVPANIC_ACPI
 	depends on ACPI
 	default PVPANIC
 
+config PVPANIC_OF
+	tristate "pvpanic mmio driver"
+	depends on OF
+
 endif
diff --git a/drivers/misc/pvpanic/Makefile b/drivers/misc/pvpanic/Makefile
index c5b73ca..63ef0db 100644
--- a/drivers/misc/pvpanic/Makefile
+++ b/drivers/misc/pvpanic/Makefile
@@ -4,3 +4,4 @@
 
 obj-$(CONFIG_PVPANIC)            += pvpanic.o
 obj-$(CONFIG_PVPANIC_ACPI)	 += pvpanic-acpi.o
+obj-$(CONFIG_PVPANIC_OF)	 += pvpanic-of.o
diff --git a/drivers/misc/pvpanic/pvpanic-of.c b/drivers/misc/pvpanic/pvpanic-of.c
new file mode 100644
index 0000000..73ca5f3
--- /dev/null
+++ b/drivers/misc/pvpanic/pvpanic-of.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  pvpanic of driver.
+ *
+ *  Copyright (C) 2019 ZTE Ltd.
+ *  Author: Peng Hao <peng.hao2@....com.cn>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include "pvpanic.h"
+
+static int pvpanic_mmio_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
+
+	ret = pvpanic_add_device(&pdev->dev, res);
+	if (ret)
+		return -ENODEV;
+
+	return 0;
+}
+
+static int pvpanic_mmio_remove(struct platform_device *pdev)
+{
+	pvpanic_remove_device();
+	return 0;
+}
+
+static const struct of_device_id pvpanic_mmio_match[] = {
+	{ .compatible = "qemu,pvpanic-mmio", },
+	{}
+};
+
+static struct platform_driver pvpanic_mmio_driver = {
+	.driver = {
+		.name = "pvpanic-mmio",
+		.of_match_table = pvpanic_mmio_match,
+	},
+	.probe = pvpanic_mmio_probe,
+	.remove = pvpanic_mmio_remove,
+};
+
+module_platform_driver(pvpanic_mmio_driver);
-- 
1.8.3.1