diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0054-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch')
-rw-r--r-- | target/linux/mediatek/patches-4.4/0054-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0054-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch b/target/linux/mediatek/patches-4.4/0054-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch new file mode 100644 index 0000000000..d5af5f0c82 --- /dev/null +++ b/target/linux/mediatek/patches-4.4/0054-clk-mediatek-Export-CPU-mux-clocks-for-CPU-frequency.patch @@ -0,0 +1,287 @@ +From 1387d4f0ebf4b48c09f2ea0d27a02936c3fa0010 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Thu, 31 Mar 2016 02:26:37 +0200 +Subject: [PATCH 054/102] 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. + +Signed-off-by: Pi-Cheng Chen <pi-cheng.chen@linaro.org> +--- + drivers/clk/mediatek/Makefile | 2 +- + drivers/clk/mediatek/clk-cpumux.c | 127 ++++++++++++++++++++++++++++++++ + drivers/clk/mediatek/clk-cpumux.h | 22 ++++++ + drivers/clk/mediatek/clk-mt2701.c | 8 ++ + drivers/clk/mediatek/clk-mt8173.c | 23 ++++++ + include/dt-bindings/clock/mt2701-clk.h | 3 +- + include/dt-bindings/clock/mt8173-clk.h | 4 +- + 7 files changed, 186 insertions(+), 3 deletions(-) + create mode 100644 drivers/clk/mediatek/clk-cpumux.c + create mode 100644 drivers/clk/mediatek/clk-cpumux.h + +--- a/drivers/clk/mediatek/Makefile ++++ b/drivers/clk/mediatek/Makefile +@@ -1,4 +1,4 @@ +-obj-$(CONFIG_COMMON_CLK_MEDIATEK) += clk-mtk.o clk-pll.o clk-gate.o clk-apmixed.o ++obj-$(CONFIG_COMMON_CLK_MEDIATEK) += clk-mtk.o clk-pll.o clk-gate.o clk-apmixed.o clk-cpumux.o + obj-$(CONFIG_RESET_CONTROLLER) += reset.o + obj-$(CONFIG_COMMON_CLK_MT2701) += clk-mt2701.o + obj-$(CONFIG_COMMON_CLK_MT8135) += clk-mt8135.o +--- /dev/null ++++ b/drivers/clk/mediatek/clk-cpumux.c +@@ -0,0 +1,127 @@ ++/* ++ * Copyright (c) 2015 Linaro Ltd. ++ * Author: Pi-Cheng Chen <pi-cheng.chen@linaro.org> ++ * ++ * 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 <linux/clk-provider.h> ++#include <linux/mfd/syscon.h> ++#include <linux/slab.h> ++ ++#include "clk-mtk.h" ++#include "clk-cpumux.h" ++ ++struct mtk_clk_cpumux { ++ struct clk_hw hw; ++ struct regmap *regmap; ++ u32 reg; ++ u32 mask; ++ u8 shift; ++}; ++ ++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_hw_get_num_parents(hw); ++ 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 __init *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 __init 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: %ld\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; ++} +--- /dev/null ++++ b/drivers/clk/mediatek/clk-cpumux.h +@@ -0,0 +1,22 @@ ++/* ++ * Copyright (c) 2015 Linaro Ltd. ++ * Author: Pi-Cheng Chen <pi-cheng.chen@linaro.org> ++ * ++ * 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 ++ ++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 */ +--- a/drivers/clk/mediatek/clk-mt2701.c ++++ b/drivers/clk/mediatek/clk-mt2701.c +@@ -18,6 +18,7 @@ + + #include "clk-mtk.h" + #include "clk-gate.h" ++#include "clk-cpumux.h" + + #include <dt-bindings/clock/mt2701-clk.h> + +@@ -465,6 +466,10 @@ static const char * const cpu_parents[] + "mmpll" + }; + ++static const struct mtk_composite cpu_muxes[] __initconst = { ++ MUX(CLK_INFRA_CPUSEL, "infra_cpu_sel", cpu_parents, 0x0000, 2, 2), ++}; ++ + static const struct mtk_composite top_muxes[] __initconst = { + MUX_GATE(CLK_TOP_AXI_SEL, "axi_sel", axi_parents, + 0x0040, 0, 3, INVALID_MUX_GATE_BIT), +@@ -677,6 +682,9 @@ static void __init mtk_infrasys_init(str + mtk_clk_register_factors(infra_fixed_divs, ARRAY_SIZE(infra_fixed_divs), + clk_data); + ++ mtk_clk_register_cpumuxes(node, cpu_muxes, ARRAY_SIZE(cpu_muxes), ++ clk_data); ++ + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); + if (r) + pr_err("%s(): could not register clock provider: %d\n", +--- a/drivers/clk/mediatek/clk-mt8173.c ++++ b/drivers/clk/mediatek/clk-mt8173.c +@@ -18,6 +18,7 @@ + + #include "clk-mtk.h" + #include "clk-gate.h" ++#include "clk-cpumux.h" + + #include <dt-bindings/clock/mt8173-clk.h> + +@@ -526,6 +527,25 @@ static const char * const i2s3_b_ck_pare + "apll2_div5" + }; + ++static const char * const ca53_parents[] __initconst = { ++ "clk26m", ++ "armca7pll", ++ "mainpll", ++ "univpll" ++}; ++ ++static const char * const ca57_parents[] __initconst = { ++ "clk26m", ++ "armca15pll", ++ "mainpll", ++ "univpll" ++}; ++ ++static const struct mtk_composite cpu_muxes[] __initconst = { ++ MUX(CLK_INFRA_CA53SEL, "infra_ca53_sel", ca53_parents, 0x0000, 0, 2), ++ MUX(CLK_INFRA_CA57SEL, "infra_ca57_sel", ca57_parents, 0x0000, 2, 2), ++}; ++ + static const struct mtk_composite top_muxes[] __initconst = { + /* CLK_CFG_0 */ + MUX(CLK_TOP_AXI_SEL, "axi_sel", axi_parents, 0x0040, 0, 3), +@@ -945,6 +965,9 @@ static void __init mtk_infrasys_init(str + clk_data); + mtk_clk_register_factors(infra_divs, ARRAY_SIZE(infra_divs), clk_data); + ++ mtk_clk_register_cpumuxes(node, cpu_muxes, ARRAY_SIZE(cpu_muxes), ++ clk_data); ++ + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); + if (r) + pr_err("%s(): could not register clock provider: %d\n", +--- a/include/dt-bindings/clock/mt2701-clk.h ++++ b/include/dt-bindings/clock/mt2701-clk.h +@@ -217,7 +217,8 @@ + #define CLK_INFRA_PMICWRAP 17 + #define CLK_INFRA_DDCCI 18 + #define CLK_INFRA_CLK_13M 19 +-#define CLK_INFRA_NR 20 ++#define CLK_INFRA_CPUSEL 20 ++#define CLK_INFRA_NR 21 + + /* PERICFG */ + +--- a/include/dt-bindings/clock/mt8173-clk.h ++++ b/include/dt-bindings/clock/mt8173-clk.h +@@ -192,7 +192,9 @@ + #define CLK_INFRA_PMICSPI 10 + #define CLK_INFRA_PMICWRAP 11 + #define CLK_INFRA_CLK_13M 12 +-#define CLK_INFRA_NR_CLK 13 ++#define CLK_INFRA_CA53SEL 13 ++#define CLK_INFRA_CA57SEL 14 ++#define CLK_INFRA_NR_CLK 15 + + /* PERI_SYS */ + |