clk: qcom: Add graphics clock controller driver for SC7280

Add support for the graphics clock controller found on SC7280
based devices. This would allow graphics drivers to probe and
control their clocks.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
Link: https://lore.kernel.org/r/1626189143-12957-6-git-send-email-tdas@codeaurora.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

3 files changed, 500 insertions, 0 deletions

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index d7a8ce7a6e6f..80b2b6b70d68 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -385,6 +385,14 @@ config SC_GPUCC_7180
 	  Say Y if you want to support graphics controller devices and
 	  functionality such as 3D graphics.
 
+config SC_GPUCC_7280
+	tristate "SC7280 Graphics Clock Controller"
+	select SC_GCC_7280
+	help
+	  Support for the graphics clock controller on SC7280 devices.
+	  Say Y if you want to support graphics controller devices and
+	  functionality such as 3D graphics.
+
 config SC_MSS_7180
 	tristate "SC7180 Modem Clock Controller"
 	select SC_GCC_7180
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 871758d39786..9d5f9db40d3d 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_SC_GCC_7180) += gcc-sc7180.o
 obj-$(CONFIG_SC_GCC_7280) += gcc-sc7280.o
 obj-$(CONFIG_SC_GCC_8180X) += gcc-sc8180x.o
 obj-$(CONFIG_SC_GPUCC_7180) += gpucc-sc7180.o
+obj-$(CONFIG_SC_GPUCC_7280) += gpucc-sc7280.o
 obj-$(CONFIG_SC_LPASS_CORECC_7180) += lpasscorecc-sc7180.o
 obj-$(CONFIG_SC_MSS_7180) += mss-sc7180.o
 obj-$(CONFIG_SC_VIDEOCC_7180) += videocc-sc7180.o
diff --git a/drivers/clk/qcom/gpucc-sc7280.c b/drivers/clk/qcom/gpucc-sc7280.c
new file mode 100644
index 000000000000..9a832f2bcf49
--- /dev/null
+++ b/drivers/clk/qcom/gpucc-sc7280.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,gpucc-sc7280.h>
+
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-rcg.h"
+#include "clk-regmap-divider.h"
+#include "common.h"
+#include "reset.h"
+#include "gdsc.h"
+
+enum {
+	P_BI_TCXO,
+	P_GCC_GPU_GPLL0_CLK_SRC,
+	P_GCC_GPU_GPLL0_DIV_CLK_SRC,
+	P_GPU_CC_PLL0_OUT_MAIN,
+	P_GPU_CC_PLL1_OUT_MAIN,
+};
+
+static const struct pll_vco lucid_vco[] = {
+	{ 249600000, 2000000000, 0 },
+};
+
+static struct clk_alpha_pll gpu_cc_pll0 = {
+	.offset = 0x0,
+	.vco_table = lucid_vco,
+	.num_vco = ARRAY_SIZE(lucid_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID],
+	.clkr = {
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_pll0",
+			.parent_data = &(const struct clk_parent_data){
+				.fw_name = "bi_tcxo",
+			},
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_lucid_ops,
+		},
+	},
+};
+
+/* 500MHz Configuration */
+static const struct alpha_pll_config gpu_cc_pll1_config = {
+	.l = 0x1A,
+	.alpha = 0xAAA,
+	.config_ctl_val = 0x20485699,
+	.config_ctl_hi_val = 0x00002261,
+	.config_ctl_hi1_val = 0x329A299C,
+	.user_ctl_val = 0x00000001,
+	.user_ctl_hi_val = 0x00000805,
+	.user_ctl_hi1_val = 0x00000000,
+};
+
+static struct clk_alpha_pll gpu_cc_pll1 = {
+	.offset = 0x100,
+	.vco_table = lucid_vco,
+	.num_vco = ARRAY_SIZE(lucid_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID],
+	.clkr = {
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_pll1",
+			.parent_data = &(const struct clk_parent_data){
+				.fw_name = "bi_tcxo",
+			},
+			.num_parents = 1,
+			.ops = &clk_alpha_pll_lucid_ops,
+		},
+	},
+};
+
+static const struct parent_map gpu_cc_parent_map_0[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_GPU_CC_PLL0_OUT_MAIN, 1 },
+	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
+	{ P_GCC_GPU_GPLL0_CLK_SRC, 5 },
+	{ P_GCC_GPU_GPLL0_DIV_CLK_SRC, 6 },
+};
+
+static const struct clk_parent_data gpu_cc_parent_data_0[] = {
+	{ .fw_name = "bi_tcxo" },
+	{ .hw = &gpu_cc_pll0.clkr.hw },
+	{ .hw = &gpu_cc_pll1.clkr.hw },
+	{ .fw_name = "gcc_gpu_gpll0_clk_src" },
+	{ .fw_name = "gcc_gpu_gpll0_div_clk_src" },
+};
+
+static const struct parent_map gpu_cc_parent_map_1[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
+	{ P_GCC_GPU_GPLL0_CLK_SRC, 5 },
+	{ P_GCC_GPU_GPLL0_DIV_CLK_SRC, 6 },
+};
+
+static const struct clk_parent_data gpu_cc_parent_data_1[] = {
+	{ .fw_name = "bi_tcxo", },
+	{ .hw = &gpu_cc_pll1.clkr.hw },
+	{ .fw_name = "gcc_gpu_gpll0_clk_src", },
+	{ .fw_name = "gcc_gpu_gpll0_div_clk_src", },
+};
+
+static const struct freq_tbl ftbl_gpu_cc_gmu_clk_src[] = {
+	F(19200000, P_BI_TCXO, 1, 0, 0),
+	F(200000000, P_GCC_GPU_GPLL0_DIV_CLK_SRC, 1.5, 0, 0),
+	F(500000000, P_GPU_CC_PLL1_OUT_MAIN, 1, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 gpu_cc_gmu_clk_src = {
+	.cmd_rcgr = 0x1120,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = gpu_cc_parent_map_0,
+	.freq_tbl = ftbl_gpu_cc_gmu_clk_src,
+	.clkr.hw.init = &(struct clk_init_data){
+		.name = "gpu_cc_gmu_clk_src",
+		.parent_data = gpu_cc_parent_data_0,
+		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_0),
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static const struct freq_tbl ftbl_gpu_cc_hub_clk_src[] = {
+	F(150000000, P_GCC_GPU_GPLL0_DIV_CLK_SRC, 2, 0, 0),
+	F(240000000, P_GCC_GPU_GPLL0_CLK_SRC, 2.5, 0, 0),
+	F(300000000, P_GCC_GPU_GPLL0_CLK_SRC, 2, 0, 0),
+	{ }
+};
+
+static struct clk_rcg2 gpu_cc_hub_clk_src = {
+	.cmd_rcgr = 0x117c,
+	.mnd_width = 0,
+	.hid_width = 5,
+	.parent_map = gpu_cc_parent_map_1,
+	.freq_tbl = ftbl_gpu_cc_hub_clk_src,
+	.clkr.hw.init = &(struct clk_init_data){
+		.name = "gpu_cc_hub_clk_src",
+		.parent_data = gpu_cc_parent_data_1,
+		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_1),
+		.ops = &clk_rcg2_shared_ops,
+	},
+};
+
+static struct clk_regmap_div gpu_cc_hub_ahb_div_clk_src = {
+	.reg = 0x11c0,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(struct clk_init_data) {
+		.name = "gpu_cc_hub_ahb_div_clk_src",
+		.parent_hws = (const struct clk_hw*[]){
+			&gpu_cc_hub_clk_src.clkr.hw,
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_regmap_div_ro_ops,
+	},
+};
+
+static struct clk_regmap_div gpu_cc_hub_cx_int_div_clk_src = {
+	.reg = 0x11bc,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(struct clk_init_data) {
+		.name = "gpu_cc_hub_cx_int_div_clk_src",
+		.parent_hws = (const struct clk_hw*[]){
+			&gpu_cc_hub_clk_src.clkr.hw,
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_regmap_div_ro_ops,
+	},
+};
+
+static struct clk_branch gpu_cc_ahb_clk = {
+	.halt_reg = 0x1078,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x1078,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_ahb_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_hub_ahb_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_crc_ahb_clk = {
+	.halt_reg = 0x107c,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x107c,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_crc_ahb_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_hub_ahb_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cx_gmu_clk = {
+	.halt_reg = 0x1098,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x1098,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_cx_gmu_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_gmu_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cx_snoc_dvm_clk = {
+	.halt_reg = 0x108c,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x108c,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_cx_snoc_dvm_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cxo_aon_clk = {
+	.halt_reg = 0x1004,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x1004,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_cxo_aon_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cxo_clk = {
+	.halt_reg = 0x109c,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x109c,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_cxo_clk",
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_gx_gmu_clk = {
+	.halt_reg = 0x1064,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x1064,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_gx_gmu_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_gmu_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_hlos1_vote_gpu_smmu_clk = {
+	.halt_reg = 0x5000,
+	.halt_check = BRANCH_VOTED,
+	.clkr = {
+		.enable_reg = 0x5000,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_hlos1_vote_gpu_smmu_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_hub_aon_clk = {
+	.halt_reg = 0x1178,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x1178,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_hub_aon_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_hub_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_hub_cx_int_clk = {
+	.halt_reg = 0x1204,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x1204,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_hub_cx_int_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_hub_cx_int_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_mnd1x_0_gfx3d_clk = {
+	.halt_reg = 0x802c,
+	.halt_check = BRANCH_HALT_SKIP,
+	.clkr = {
+		.enable_reg = 0x802c,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_mnd1x_0_gfx3d_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_mnd1x_1_gfx3d_clk = {
+	.halt_reg = 0x8030,
+	.halt_check = BRANCH_HALT_SKIP,
+	.clkr = {
+		.enable_reg = 0x8030,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_mnd1x_1_gfx3d_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_sleep_clk = {
+	.halt_reg = 0x1090,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x1090,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_sleep_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct gdsc cx_gdsc = {
+	.gdscr = 0x106c,
+	.gds_hw_ctrl = 0x1540,
+	.pd = {
+		.name = "cx_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = VOTABLE | RETAIN_FF_ENABLE,
+};
+
+static struct gdsc gx_gdsc = {
+	.gdscr = 0x100c,
+	.clamp_io_ctrl = 0x1508,
+	.pd = {
+		.name = "gx_gdsc",
+		.power_on = gdsc_gx_do_nothing_enable,
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = CLAMP_IO | RETAIN_FF_ENABLE,
+};
+
+static struct gdsc *gpu_cc_sc7180_gdscs[] = {
+	[GPU_CC_CX_GDSC] = &cx_gdsc,
+	[GPU_CC_GX_GDSC] = &gx_gdsc,
+};
+
+static struct clk_regmap *gpu_cc_sc7280_clocks[] = {
+	[GPU_CC_AHB_CLK] = &gpu_cc_ahb_clk.clkr,
+	[GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
+	[GPU_CC_CX_GMU_CLK] = &gpu_cc_cx_gmu_clk.clkr,
+	[GPU_CC_CX_SNOC_DVM_CLK] = &gpu_cc_cx_snoc_dvm_clk.clkr,
+	[GPU_CC_CXO_AON_CLK] = &gpu_cc_cxo_aon_clk.clkr,
+	[GPU_CC_CXO_CLK] = &gpu_cc_cxo_clk.clkr,
+	[GPU_CC_GMU_CLK_SRC] = &gpu_cc_gmu_clk_src.clkr,
+	[GPU_CC_GX_GMU_CLK] = &gpu_cc_gx_gmu_clk.clkr,
+	[GPU_CC_HLOS1_VOTE_GPU_SMMU_CLK] = &gpu_cc_hlos1_vote_gpu_smmu_clk.clkr,
+	[GPU_CC_HUB_AHB_DIV_CLK_SRC] = &gpu_cc_hub_ahb_div_clk_src.clkr,
+	[GPU_CC_HUB_AON_CLK] = &gpu_cc_hub_aon_clk.clkr,
+	[GPU_CC_HUB_CLK_SRC] = &gpu_cc_hub_clk_src.clkr,
+	[GPU_CC_HUB_CX_INT_CLK] = &gpu_cc_hub_cx_int_clk.clkr,
+	[GPU_CC_HUB_CX_INT_DIV_CLK_SRC] = &gpu_cc_hub_cx_int_div_clk_src.clkr,
+	[GPU_CC_MND1X_0_GFX3D_CLK] = &gpu_cc_mnd1x_0_gfx3d_clk.clkr,
+	[GPU_CC_MND1X_1_GFX3D_CLK] = &gpu_cc_mnd1x_1_gfx3d_clk.clkr,
+	[GPU_CC_PLL0] = &gpu_cc_pll0.clkr,
+	[GPU_CC_PLL1] = &gpu_cc_pll1.clkr,
+	[GPU_CC_SLEEP_CLK] = &gpu_cc_sleep_clk.clkr,
+};
+
+static const struct regmap_config gpu_cc_sc7280_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0x8030,
+	.fast_io = true,
+};
+
+static const struct qcom_cc_desc gpu_cc_sc7280_desc = {
+	.config = &gpu_cc_sc7280_regmap_config,
+	.clks = gpu_cc_sc7280_clocks,
+	.num_clks = ARRAY_SIZE(gpu_cc_sc7280_clocks),
+	.gdscs = gpu_cc_sc7180_gdscs,
+	.num_gdscs = ARRAY_SIZE(gpu_cc_sc7180_gdscs),
+};
+
+static const struct of_device_id gpu_cc_sc7280_match_table[] = {
+	{ .compatible = "qcom,sc7280-gpucc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, gpu_cc_sc7280_match_table);
+
+static int gpu_cc_sc7280_probe(struct platform_device *pdev)
+{
+	struct regmap *regmap;
+
+	regmap = qcom_cc_map(pdev, &gpu_cc_sc7280_desc);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	clk_lucid_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll1_config);
+
+	/*
+	 * Keep the clocks always-ON
+	 * GPU_CC_CB_CLK, GPUCC_CX_GMU_CLK
+	 */
+	regmap_update_bits(regmap, 0x1170, BIT(0), BIT(0));
+	regmap_update_bits(regmap, 0x1098, BIT(0), BIT(0));
+
+	return qcom_cc_really_probe(pdev, &gpu_cc_sc7280_desc, regmap);
+}
+
+static struct platform_driver gpu_cc_sc7280_driver = {
+	.probe = gpu_cc_sc7280_probe,
+	.driver = {
+		.name = "gpu_cc-sc7280",
+		.of_match_table = gpu_cc_sc7280_match_table,
+	},
+};
+
+static int __init gpu_cc_sc7280_init(void)
+{
+	return platform_driver_register(&gpu_cc_sc7280_driver);
+}
+subsys_initcall(gpu_cc_sc7280_init);
+
+static void __exit gpu_cc_sc7280_exit(void)
+{
+	platform_driver_unregister(&gpu_cc_sc7280_driver);
+}
+module_exit(gpu_cc_sc7280_exit);
+
+MODULE_DESCRIPTION("QTI GPU_CC SC7280 Driver");
+MODULE_LICENSE("GPL v2");