From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001 From: James <> Date: Wed, 4 Nov 2015 11:49:21 +0000 Subject: trunk-47381 --- ...k-Export-CPU-mux-clocks-for-CPU-frequency.patch | 199 +++++++++++++++++++++ 1 file changed, 199 insertions(+) create mode 100644 target/linux/mediatek/patches/0070-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch (limited to 'target/linux/mediatek/patches/0070-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch') diff --git a/target/linux/mediatek/patches/0070-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch b/target/linux/mediatek/patches/0070-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch new file mode 100644 index 0000000..87de0f9 --- /dev/null +++ b/target/linux/mediatek/patches/0070-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch @@ -0,0 +1,199 @@ +From ac825c0dd7370ae1b9a1a4346f895728e09d9cc7 Mon Sep 17 00:00:00 2001 +From: John Crispin +Date: Wed, 1 Jul 2015 07:58:44 +0200 +Subject: [PATCH 70/76] clk: mediatek: Export CPU mux clocks for CPU frequency + control + +This patch adds CPU mux clocks which are used by Mediatek cpufreq driver +for intermediate clock source switching. + +Changes in v3: +- Rebase to 4.2-rc1 +- Fix some issues of v2 + +Changes in v2: +- Remove use of .determine_rate callback + +Signed-off-by: Pi-Cheng Chen +--- + drivers/clk/mediatek/Makefile | 2 +- + drivers/clk/mediatek/clk-cpumux.c | 119 +++++++++++++++++++++++++++++++++++++ + drivers/clk/mediatek/clk-cpumux.h | 30 ++++++++++ + 3 files changed, 150 insertions(+), 1 deletion(-) + create mode 100644 drivers/clk/mediatek/clk-cpumux.c + create mode 100644 drivers/clk/mediatek/clk-cpumux.h + +diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile +index 19a3763..fe07e26 100644 +--- a/drivers/clk/mediatek/Makefile ++++ b/drivers/clk/mediatek/Makefile +@@ -1,4 +1,4 @@ +-obj-y += clk-mtk.o clk-pll.o clk-gate.o ++obj-y += clk-mtk.o clk-pll.o clk-gate.o clk-cpumux.o + obj-$(CONFIG_RESET_CONTROLLER) += reset.o + obj-y += clk-mt7623.o + obj-y += clk-mt8135.o +diff --git a/drivers/clk/mediatek/clk-cpumux.c b/drivers/clk/mediatek/clk-cpumux.c +new file mode 100644 +index 0000000..593df45 +--- /dev/null ++++ b/drivers/clk/mediatek/clk-cpumux.c +@@ -0,0 +1,119 @@ ++/* ++ * Copyright (c) 2015 Linaro Ltd. ++ * Author: Pi-Cheng Chen ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ */ ++ ++#include ++#include ++#include ++ ++#include "clk-mtk.h" ++#include "clk-cpumux.h" ++ ++static inline struct mtk_clk_cpumux *to_clk_mux(struct clk_hw *_hw) ++{ ++ return container_of(_hw, struct mtk_clk_cpumux, hw); ++} ++ ++static u8 clk_cpumux_get_parent(struct clk_hw *hw) ++{ ++ struct mtk_clk_cpumux *mux = to_clk_mux(hw); ++ int num_parents = __clk_get_num_parents(hw->clk); ++ unsigned int val; ++ ++ regmap_read(mux->regmap, mux->reg, &val); ++ ++ val >>= mux->shift; ++ val &= mux->mask; ++ ++ if (val >= num_parents) ++ return -EINVAL; ++ ++ return val; ++} ++ ++static int clk_cpumux_set_parent(struct clk_hw *hw, u8 index) ++{ ++ struct mtk_clk_cpumux *mux = to_clk_mux(hw); ++ u32 mask, val; ++ ++ val = index << mux->shift; ++ mask = mux->mask << mux->shift; ++ ++ return regmap_update_bits(mux->regmap, mux->reg, mask, val); ++} ++ ++static const struct clk_ops clk_cpumux_ops = { ++ .get_parent = clk_cpumux_get_parent, ++ .set_parent = clk_cpumux_set_parent, ++}; ++ ++static struct clk *mtk_clk_register_cpumux(const struct mtk_composite *mux, ++ struct regmap *regmap) ++{ ++ struct mtk_clk_cpumux *cpumux; ++ struct clk *clk; ++ struct clk_init_data init; ++ ++ cpumux = kzalloc(sizeof(*cpumux), GFP_KERNEL); ++ if (!cpumux) ++ return ERR_PTR(-ENOMEM); ++ ++ init.name = mux->name; ++ init.ops = &clk_cpumux_ops; ++ init.parent_names = mux->parent_names; ++ init.num_parents = mux->num_parents; ++ init.flags = mux->flags; ++ ++ cpumux->reg = mux->mux_reg; ++ cpumux->shift = mux->mux_shift; ++ cpumux->mask = BIT(mux->mux_width) - 1; ++ cpumux->regmap = regmap; ++ cpumux->hw.init = &init; ++ ++ clk = clk_register(NULL, &cpumux->hw); ++ if (IS_ERR(clk)) ++ kfree(cpumux); ++ ++ return clk; ++} ++ ++int mtk_clk_register_cpumuxes(struct device_node *node, ++ const struct mtk_composite *clks, int num, ++ struct clk_onecell_data *clk_data) ++{ ++ int i; ++ struct clk *clk; ++ struct regmap *regmap; ++ ++ regmap = syscon_node_to_regmap(node); ++ if (IS_ERR(regmap)) { ++ pr_err("Cannot find regmap for %s: %d\n", node->full_name, ++ PTR_ERR(regmap)); ++ return PTR_ERR(regmap); ++ } ++ ++ for (i = 0; i < num; i++) { ++ const struct mtk_composite *mux = &clks[i]; ++ ++ clk = mtk_clk_register_cpumux(mux, regmap); ++ if (IS_ERR(clk)) { ++ pr_err("Failed to register clk %s: %ld\n", ++ mux->name, PTR_ERR(clk)); ++ continue; ++ } ++ ++ clk_data->clks[mux->id] = clk; ++ } ++ ++ return 0; ++} +diff --git a/drivers/clk/mediatek/clk-cpumux.h b/drivers/clk/mediatek/clk-cpumux.h +new file mode 100644 +index 0000000..dddaad5 +--- /dev/null ++++ b/drivers/clk/mediatek/clk-cpumux.h +@@ -0,0 +1,30 @@ ++/* ++ * Copyright (c) 2015 Linaro Ltd. ++ * Author: Pi-Cheng Chen ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ */ ++ ++#ifndef __DRV_CLK_CPUMUX_H ++#define __DRV_CLK_CPUMUX_H ++ ++struct mtk_clk_cpumux { ++ struct clk_hw hw; ++ struct regmap *regmap; ++ u32 reg; ++ u32 mask; ++ u8 shift; ++}; ++ ++int mtk_clk_register_cpumuxes(struct device_node *node, ++ const struct mtk_composite *clks, int num, ++ struct clk_onecell_data *clk_data); ++ ++#endif /* __DRV_CLK_CPUMUX_H */ +-- +1.7.10.4 + -- cgit v1.2.3