1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/i3c/master/aspeed-i3c-global.c b/drivers/i3c/master/aspeed-i3c-global.c
new file mode 100644
index 000000000000..0283a3d7977f
--- /dev/null
+++ b/drivers/i3c/master/aspeed-i3c-global.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2019 ASPEED Technology Inc.
+
+#include <linux/clk.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+#include <linux/reset.h>
+#include <linux/delay.h>
+
+#define ASPEED_I3CG_CTRL(x)		(0x10 + (x*0x10))
+#define ASPEED_I3CG_SET(x)		(0x14 + (x*0x10))
+
+struct aspeed_i3c_global {
+	void __iomem		*base;
+	struct reset_control	*rst;
+};
+
+static int aspeed_i3c_global_probe(struct platform_device *pdev)
+{
+	struct aspeed_i3c_global *i3c_global;
+	struct device_node *node = pdev->dev.of_node;
+	int i = 0;
+
+	i3c_global = kzalloc(sizeof(*i3c_global), GFP_KERNEL);
+	if (!i3c_global)
+		return -ENOMEM;
+
+	i3c_global->base = of_iomap(node, 0);
+	if (!i3c_global->base) {
+		return -ENOMEM;
+	}
+
+	i3c_global->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+
+	if (IS_ERR(i3c_global->rst)) {
+		if (PTR_ERR(i3c_global->rst) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "missing or invalid reset controller device tree entry\n");
+		return PTR_ERR(i3c_global->rst);
+	}
+
+	reset_control_assert(i3c_global->rst);
+	udelay(3);
+	reset_control_deassert(i3c_global->rst);
+
+	/* init */
+	for(i = 0; i < 5; i++)
+		writel(0x000474c4, i3c_global->base + ASPEED_I3CG_SET(i));
+
+	return 0;
+}
+
+static const struct of_device_id aspeed_i3c_of_match[] = {
+	{ .compatible = "aspeed,ast2600-i3c-global", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, aspeed_i3c_of_match);
+
+static struct platform_driver aspeed_i3c_driver = {
+	.probe  = aspeed_i3c_global_probe,
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.of_match_table = aspeed_i3c_of_match,
+	},
+};
+module_platform_driver(aspeed_i3c_driver);
+
+MODULE_AUTHOR("Ryan Chen");
+MODULE_DESCRIPTION("ASPEED I3C Global Driver");
+MODULE_LICENSE("GPL v2");