summaryrefslogtreecommitdiffstats
path: root/drivers/clk/mediatek/clk-pll.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/clk/mediatek/clk-pll.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/clk/mediatek/clk-pll.h')
-rw-r--r--drivers/clk/mediatek/clk-pll.h112
1 files changed, 112 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-pll.h b/drivers/clk/mediatek/clk-pll.h
new file mode 100644
index 0000000000..f17278ff15
--- /dev/null
+++ b/drivers/clk/mediatek/clk-pll.h
@@ -0,0 +1,112 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: James Liao <jamesjj.liao@mediatek.com>
+ */
+
+#ifndef __DRV_CLK_MTK_PLL_H
+#define __DRV_CLK_MTK_PLL_H
+
+#include <linux/clk-provider.h>
+#include <linux/types.h>
+
+struct clk_ops;
+struct clk_hw_onecell_data;
+struct device_node;
+
+struct mtk_pll_div_table {
+ u32 div;
+ unsigned long freq;
+};
+
+#define HAVE_RST_BAR BIT(0)
+#define PLL_AO BIT(1)
+#define POSTDIV_MASK GENMASK(2, 0)
+
+struct mtk_pll_data {
+ int id;
+ const char *name;
+ u32 reg;
+ u32 pwr_reg;
+ u32 en_mask;
+ u32 pd_reg;
+ u32 tuner_reg;
+ u32 tuner_en_reg;
+ u8 tuner_en_bit;
+ int pd_shift;
+ unsigned int flags;
+ const struct clk_ops *ops;
+ u32 rst_bar_mask;
+ unsigned long fmin;
+ unsigned long fmax;
+ int pcwbits;
+ int pcwibits;
+ u32 pcw_reg;
+ int pcw_shift;
+ u32 pcw_chg_reg;
+ const struct mtk_pll_div_table *div_table;
+ const char *parent_name;
+ u32 en_reg;
+ u8 pll_en_bit; /* Assume 0, indicates BIT(0) by default */
+};
+
+/*
+ * MediaTek PLLs are configured through their pcw value. The pcw value describes
+ * a divider in the PLL feedback loop which consists of 7 bits for the integer
+ * part and the remaining bits (if present) for the fractional part. Also they
+ * have a 3 bit power-of-two post divider.
+ */
+
+struct mtk_clk_pll {
+ struct clk_hw hw;
+ void __iomem *base_addr;
+ void __iomem *pd_addr;
+ void __iomem *pwr_addr;
+ void __iomem *tuner_addr;
+ void __iomem *tuner_en_addr;
+ void __iomem *pcw_addr;
+ void __iomem *pcw_chg_addr;
+ void __iomem *en_addr;
+ const struct mtk_pll_data *data;
+};
+
+int mtk_clk_register_plls(struct device_node *node,
+ const struct mtk_pll_data *plls, int num_plls,
+ struct clk_hw_onecell_data *clk_data);
+void mtk_clk_unregister_plls(const struct mtk_pll_data *plls, int num_plls,
+ struct clk_hw_onecell_data *clk_data);
+
+extern const struct clk_ops mtk_pll_ops;
+
+static inline struct mtk_clk_pll *to_mtk_clk_pll(struct clk_hw *hw)
+{
+ return container_of(hw, struct mtk_clk_pll, hw);
+}
+
+int mtk_pll_is_prepared(struct clk_hw *hw);
+
+int mtk_pll_prepare(struct clk_hw *hw);
+
+void mtk_pll_unprepare(struct clk_hw *hw);
+
+unsigned long mtk_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate);
+
+void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv,
+ u32 freq, u32 fin);
+int mtk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate);
+long mtk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate);
+
+struct clk_hw *mtk_clk_register_pll_ops(struct mtk_clk_pll *pll,
+ const struct mtk_pll_data *data,
+ void __iomem *base,
+ const struct clk_ops *pll_ops);
+struct clk_hw *mtk_clk_register_pll(const struct mtk_pll_data *data,
+ void __iomem *base);
+void mtk_clk_unregister_pll(struct clk_hw *hw);
+
+__iomem void *mtk_clk_pll_get_base(struct clk_hw *hw,
+ const struct mtk_pll_data *data);
+
+#endif /* __DRV_CLK_MTK_PLL_H */