GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/clk/imx/clk-imx8.c

@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2018 NXP
+ * Peng Fan <peng.fan@nxp.com>
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <asm/arch/sci/sci.h>
+#include <asm/arch/clock.h>
+#include <dt-bindings/clock/imx8qxp-clock.h>
+#include <dt-bindings/soc/imx_rsrc.h>
+#include <misc.h>
+
+#include "clk-imx8.h"
+
+__weak ulong imx8_clk_get_rate(struct clk *clk)
+{
+	return 0;
+}
+
+__weak ulong imx8_clk_set_rate(struct clk *clk, unsigned long rate)
+{
+	return 0;
+}
+
+__weak int __imx8_clk_enable(struct clk *clk, bool enable)
+{
+	return -ENOTSUPP;
+}
+
+static int imx8_clk_disable(struct clk *clk)
+{
+	return __imx8_clk_enable(clk, 0);
+}
+
+static int imx8_clk_enable(struct clk *clk)
+{
+	return __imx8_clk_enable(clk, 1);
+}
+
+#if CONFIG_IS_ENABLED(CMD_CLK)
+int soc_clk_dump(void)
+{
+	struct udevice *dev;
+	struct clk clk;
+	unsigned long rate;
+	int i, ret;
+
+	ret = uclass_get_device_by_driver(UCLASS_CLK,
+					  DM_GET_DRIVER(imx8_clk), &dev);
+	if (ret)
+		return ret;
+
+	printf("Clk\t\tHz\n");
+
+	for (i = 0; i < num_clks; i++) {
+		clk.id = imx8_clk_names[i].id;
+		ret = clk_request(dev, &clk);
+		if (ret < 0) {
+			debug("%s clk_request() failed: %d\n", __func__, ret);
+			continue;
+		}
+
+		ret = clk_get_rate(&clk);
+		rate = ret;
+
+		clk_free(&clk);
+
+		if (ret == -ENOTSUPP) {
+			printf("clk ID %lu not supported yet\n",
+			       imx8_clk_names[i].id);
+			continue;
+		}
+		if (ret < 0) {
+			printf("%s %lu: get_rate err: %d\n",
+			       __func__, imx8_clk_names[i].id, ret);
+			continue;
+		}
+
+		printf("%s(%3lu):\t%lu\n",
+		       imx8_clk_names[i].name, imx8_clk_names[i].id, rate);
+	}
+
+	return 0;
+}
+#endif
+
+static struct clk_ops imx8_clk_ops = {
+	.set_rate = imx8_clk_set_rate,
+	.get_rate = imx8_clk_get_rate,
+	.enable = imx8_clk_enable,
+	.disable = imx8_clk_disable,
+};
+
+static int imx8_clk_probe(struct udevice *dev)
+{
+	return 0;
+}
+
+static const struct udevice_id imx8_clk_ids[] = {
+	{ .compatible = "fsl,imx8qxp-clk" },
+	{ .compatible = "fsl,imx8qm-clk" },
+	{ },
+};
+
+U_BOOT_DRIVER(imx8_clk) = {
+	.name = "clk_imx8",
+	.id = UCLASS_CLK,
+	.of_match = imx8_clk_ids,
+	.ops = &imx8_clk_ops,
+	.probe = imx8_clk_probe,
+	.flags = DM_FLAG_PRE_RELOC,
+};