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@@ -0,0 +1,85 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * MediaTek timer driver
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+ *
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+ * Copyright (C) 2018 MediaTek Inc.
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+ * Author: Ryder Lee <ryder.lee@mediatek.com>
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+ */
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+
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+#include <clk.h>
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+#include <common.h>
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+#include <dm.h>
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+#include <timer.h>
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+#include <asm/io.h>
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+
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+#define MTK_GPT4_CTRL 0x40
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+#define MTK_GPT4_CLK 0x44
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+#define MTK_GPT4_CNT 0x48
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+
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+#define GPT4_ENABLE BIT(0)
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+#define GPT4_CLEAR BIT(1)
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+#define GPT4_FREERUN GENMASK(5, 4)
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+#define GPT4_CLK_SYS 0x0
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+#define GPT4_CLK_DIV1 0x0
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+
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+struct mtk_timer_priv {
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+ void __iomem *base;
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+};
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+
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+static int mtk_timer_get_count(struct udevice *dev, u64 *count)
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+{
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+ struct mtk_timer_priv *priv = dev_get_priv(dev);
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+ u32 val = readl(priv->base + MTK_GPT4_CNT);
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+
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+ *count = timer_conv_64(val);
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+
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+ return 0;
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+}
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+
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+static int mtk_timer_probe(struct udevice *dev)
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+{
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+ struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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+ struct mtk_timer_priv *priv = dev_get_priv(dev);
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+ struct clk clk, parent;
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+ int ret;
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+
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+ priv->base = dev_read_addr_ptr(dev);
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+ if (!priv->base)
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+ return -ENOENT;
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+
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+ ret = clk_get_by_index(dev, 0, &clk);
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+ if (ret)
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+ return ret;
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+
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+ ret = clk_get_by_index(dev, 1, &parent);
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+ if (!ret) {
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+ ret = clk_set_parent(&clk, &parent);
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+ if (ret)
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+ return ret;
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+ }
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+
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+ uc_priv->clock_rate = clk_get_rate(&clk);
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+ if (!uc_priv->clock_rate)
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+ return -EINVAL;
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+
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+ return 0;
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+}
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+
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+static const struct timer_ops mtk_timer_ops = {
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+ .get_count = mtk_timer_get_count,
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+};
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+
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+static const struct udevice_id mtk_timer_ids[] = {
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+ { .compatible = "mediatek,timer" },
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+ { }
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+};
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+
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+U_BOOT_DRIVER(mtk_timer) = {
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+ .name = "mtk_timer",
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+ .id = UCLASS_TIMER,
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+ .of_match = mtk_timer_ids,
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+ .priv_auto_alloc_size = sizeof(struct mtk_timer_priv),
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+ .probe = mtk_timer_probe,
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+ .ops = &mtk_timer_ops,
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+ .flags = DM_FLAG_PRE_RELOC,
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+};
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