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Date:   Fri,  1 Mar 2019 11:21:40 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     jbrunet@...libre.com
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        linux-clk@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] clk: meson: g12a: add cpu clocks

Add the Amlogic G12A Family CPU Clock tree in read/only for now.

The CPU clock can either use the SYS_PLL for > 1GHz frequencies or
use a couple of div+mux from 1GHz/667MHz/24MHz source with 2 non-glitch
muxes.

Proper DVFS support will come in a second time.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/clk/meson/g12a.c | 348 +++++++++++++++++++++++++++++++++++++++
 drivers/clk/meson/g12a.h |   1 +
 2 files changed, 349 insertions(+)

diff --git a/drivers/clk/meson/g12a.c b/drivers/clk/meson/g12a.c
index 0e1ce8c03259..4c938f1b8421 100644
--- a/drivers/clk/meson/g12a.c
+++ b/drivers/clk/meson/g12a.c
@@ -150,6 +150,316 @@ static struct clk_regmap g12a_sys_pll = {
 	},
 };
 
+static struct clk_regmap g12a_sys_pll_div16_en = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.bit_idx = 24,
+	},
+	.hw.init = &(struct clk_init_data) {
+		.name = "sys_pll_div16_en",
+		.ops = &clk_regmap_gate_ops,
+		.parent_names = (const char *[]){ "sys_pll" },
+		.num_parents = 1,
+		/*
+		 * This clock is used to debug the sys_pll range
+		 * Linux should not change it at runtime
+		 */
+		.flags = CLK_IGNORE_UNUSED,
+	},
+};
+
+static struct clk_fixed_factor g12a_sys_pll_div16 = {
+	.mult = 1,
+	.div = 16,
+	.hw.init = &(struct clk_init_data){
+		.name = "sys_pll_div16",
+		.ops = &clk_fixed_factor_ops,
+		.parent_names = (const char *[]){ "sys_pll_div16_en" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_dyn0_sel = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.mask = 0x3,
+		.shift = 0,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_dyn0_sel",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_names = (const char *[]){ IN_PREFIX "xtal",
+						  "fclk_div2",
+						  "fclk_div3" },
+		.num_parents = 3,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_dyn0_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.shift = 4,
+		.width = 6,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_dyn0_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk_dyn0_sel" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_dyn0 = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.mask = 0x1,
+		.shift = 2,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_dyn0",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk_dyn0_sel",
+						  "cpu_clk_dyn0_div" },
+		.num_parents = 2,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_dyn1_sel = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.mask = 0x3,
+		.shift = 16,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_dyn1_sel",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_names = (const char *[]){ IN_PREFIX "xtal",
+						  "fclk_div2",
+						  "fclk_div3" },
+		.num_parents = 3,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_dyn1_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.shift = 20,
+		.width = 6,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_dyn1_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk_dyn1_sel" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_dyn1 = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.mask = 0x1,
+		.shift = 18,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_dyn1",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk_dyn1_sel",
+						  "cpu_clk_dyn1_div" },
+		.num_parents = 2,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_dyn = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.mask = 0x1,
+		.shift = 10,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_dyn",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk_dyn0",
+						  "cpu_clk_dyn1" },
+		.num_parents = 2,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL0,
+		.mask = 0x1,
+		.shift = 11,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk_dyn",
+						  "sys_pll" },
+		.num_parents = 2,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_div16_en = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.bit_idx = 1,
+	},
+	.hw.init = &(struct clk_init_data) {
+		.name = "cpu_clk_div16_en",
+		.ops = &clk_regmap_gate_ops,
+		.parent_names = (const char *[]){ "cpu_clk" },
+		.num_parents = 1,
+		/*
+		 * This clock is used to debug the cpu_clk range
+		 * Linux should not change it at runtime
+		 */
+		.flags = CLK_IGNORE_UNUSED,
+	},
+};
+
+static struct clk_fixed_factor g12a_cpu_clk_div16 = {
+	.mult = 1,
+	.div = 16,
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_div16",
+		.ops = &clk_fixed_factor_ops,
+		.parent_names = (const char *[]){ "cpu_clk_div16_en" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_apb_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.shift = 3,
+		.width = 3,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_apb_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_apb = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.bit_idx = 1,
+	},
+	.hw.init = &(struct clk_init_data) {
+		.name = "cpu_clk_apb",
+		.ops = &clk_regmap_gate_ops,
+		.parent_names = (const char *[]){ "cpu_clk_apb_div" },
+		.num_parents = 1,
+		/*
+		 * This clock is set by the ROM monitor code,
+		 * Linux should not change it at runtime
+		 */
+		.flags = CLK_IGNORE_UNUSED,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_atb_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.shift = 6,
+		.width = 3,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_atb_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_atb = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.bit_idx = 17,
+	},
+	.hw.init = &(struct clk_init_data) {
+		.name = "cpu_clk_atb",
+		.ops = &clk_regmap_gate_ops,
+		.parent_names = (const char *[]){ "cpu_clk_atb_div" },
+		.num_parents = 1,
+		/*
+		 * This clock is set by the ROM monitor code,
+		 * Linux should not change it at runtime
+		 */
+		.flags = CLK_IGNORE_UNUSED,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_axi_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.shift = 9,
+		.width = 3,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_axi_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_axi = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.bit_idx = 18,
+	},
+	.hw.init = &(struct clk_init_data) {
+		.name = "cpu_clk_axi",
+		.ops = &clk_regmap_gate_ops,
+		.parent_names = (const char *[]){ "cpu_clk_axi_div" },
+		.num_parents = 1,
+		/*
+		 * This clock is set by the ROM monitor code,
+		 * Linux should not change it at runtime
+		 */
+		.flags = CLK_IGNORE_UNUSED,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_trace_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.shift = 20,
+		.width = 3,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "cpu_clk_trace_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "cpu_clk" },
+		.num_parents = 1,
+	},
+};
+
+static struct clk_regmap g12a_cpu_clk_trace = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL1,
+		.bit_idx = 23,
+	},
+	.hw.init = &(struct clk_init_data) {
+		.name = "cpu_clk_trace",
+		.ops = &clk_regmap_gate_ops,
+		.parent_names = (const char *[]){ "cpu_clk_trace_div" },
+		.num_parents = 1,
+		/*
+		 * This clock is set by the ROM monitor code,
+		 * Linux should not change it at runtime
+		 */
+		.flags = CLK_IGNORE_UNUSED,
+	},
+};
+
 static const struct pll_mult_range g12a_gp0_pll_mult_range = {
 	.min = 55,
 	.max = 255,
@@ -2167,6 +2477,26 @@ static struct clk_hw_onecell_data g12a_hw_onecell_data = {
 		[CLKID_MALI]			= &g12a_mali.hw,
 		[CLKID_MPLL_5OM_DIV]		= &g12a_mpll_50m_div.hw,
 		[CLKID_MPLL_5OM]		= &g12a_mpll_50m.hw,
+		[CLKID_SYS_PLL_DIV16_EN]	= &g12a_sys_pll_div16_en.hw,
+		[CLKID_SYS_PLL_DIV16]		= &g12a_sys_pll_div16.hw,
+		[CLKID_CPU_CLK_DYN0_SEL]	= &g12a_cpu_clk_dyn0_sel.hw,
+		[CLKID_CPU_CLK_DYN0_DIV]	= &g12a_cpu_clk_dyn0_div.hw,
+		[CLKID_CPU_CLK_DYN0]		= &g12a_cpu_clk_dyn0.hw,
+		[CLKID_CPU_CLK_DYN1_SEL]	= &g12a_cpu_clk_dyn1_sel.hw,
+		[CLKID_CPU_CLK_DYN1_DIV]	= &g12a_cpu_clk_dyn1_div.hw,
+		[CLKID_CPU_CLK_DYN1]		= &g12a_cpu_clk_dyn1.hw,
+		[CLKID_CPU_CLK_DYN]		= &g12a_cpu_clk_dyn.hw,
+		[CLKID_CPU_CLK]			= &g12a_cpu_clk.hw,
+		[CLKID_CPU_CLK_DIV16_EN]	= &g12a_cpu_clk_div16_en.hw,
+		[CLKID_CPU_CLK_DIV16]		= &g12a_cpu_clk_div16.hw,
+		[CLKID_CPU_CLK_APB_DIV]		= &g12a_cpu_clk_apb_div.hw,
+		[CLKID_CPU_CLK_APB]		= &g12a_cpu_clk_apb.hw,
+		[CLKID_CPU_CLK_ATB_DIV]		= &g12a_cpu_clk_atb_div.hw,
+		[CLKID_CPU_CLK_ATB]		= &g12a_cpu_clk_atb.hw,
+		[CLKID_CPU_CLK_AXI_DIV]		= &g12a_cpu_clk_axi_div.hw,
+		[CLKID_CPU_CLK_AXI]		= &g12a_cpu_clk_axi.hw,
+		[CLKID_CPU_CLK_TRACE_DIV]	= &g12a_cpu_clk_trace_div.hw,
+		[CLKID_CPU_CLK_TRACE]		= &g12a_cpu_clk_trace.hw,
 		[NR_CLKS]			= NULL,
 	},
 	.num = NR_CLKS,
@@ -2335,6 +2665,24 @@ static struct clk_regmap *const g12a_clk_regmaps[] = {
 	&g12a_mali_1,
 	&g12a_mali,
 	&g12a_mpll_50m,
+	&g12a_sys_pll_div16_en,
+	&g12a_cpu_clk_dyn0_sel,
+	&g12a_cpu_clk_dyn0_div,
+	&g12a_cpu_clk_dyn0,
+	&g12a_cpu_clk_dyn1_sel,
+	&g12a_cpu_clk_dyn1_div,
+	&g12a_cpu_clk_dyn1,
+	&g12a_cpu_clk_dyn,
+	&g12a_cpu_clk,
+	&g12a_cpu_clk_div16_en,
+	&g12a_cpu_clk_apb_div,
+	&g12a_cpu_clk_apb,
+	&g12a_cpu_clk_atb_div,
+	&g12a_cpu_clk_atb,
+	&g12a_cpu_clk_axi_div,
+	&g12a_cpu_clk_axi,
+	&g12a_cpu_clk_trace_div,
+	&g12a_cpu_clk_trace,
 };
 
 static const struct meson_eeclkc_data g12a_clkc_data = {
diff --git a/drivers/clk/meson/g12a.h b/drivers/clk/meson/g12a.h
index 4854750df902..0ba3bfe4d46d 100644
--- a/drivers/clk/meson/g12a.h
+++ b/drivers/clk/meson/g12a.h
@@ -50,6 +50,7 @@
 #define HHI_GCLK_MPEG2			0x148
 #define HHI_GCLK_OTHER			0x150
 #define HHI_GCLK_OTHER2			0x154
+#define HHI_SYS_CPU_CLK_CNTL1		0x15c
 #define HHI_VID_CLK_DIV			0x164
 #define HHI_MPEG_CLK_CNTL		0x174
 #define HHI_AUD_CLK_CNTL		0x178
-- 
2.20.1

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