clk: qcom: Add graphics clock controller driver for SM8150

Add support for the graphics clock controller found on SM8150
based devices.

This is initially copied from the downstream kernel, but has
been modified to more closely match the upstream sc7180 driver.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20200709135251.643-11-jonathan@marek.ca
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/qcom/Kconfig

@@ -419,6 +419,14 @@ config SM_GCC_8250
 	  Say Y if you want to use peripheral devices such as UART,
 	  SPI, I2C, USB, SD/UFS, PCIe etc.
 
+config SM_GPUCC_8150
+	tristate "SM8150 Graphics Clock Controller"
+	select SM_GCC_8150
+	help
+	  Support for the graphics clock controller on SM8150 devices.
+	  Say Y if you want to support graphics controller devices and
+	  functionality such as 3D graphics.
+
 config SPMI_PMIC_CLKDIV
 	tristate "SPMI PMIC clkdiv Support"
 	depends on SPMI || COMPILE_TEST

drivers/clk/qcom/Makefile

@@ -65,6 +65,7 @@ obj-$(CONFIG_SDM_LPASSCC_845) += lpasscc-sdm845.o
 obj-$(CONFIG_SDM_VIDEOCC_845) += videocc-sdm845.o
 obj-$(CONFIG_SM_GCC_8150) += gcc-sm8150.o
 obj-$(CONFIG_SM_GCC_8250) += gcc-sm8250.o
+obj-$(CONFIG_SM_GPUCC_8150) += gpucc-sm8150.o
 obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o
 obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
 obj-$(CONFIG_QCOM_HFPLL) += hfpll.o

drivers/clk/qcom/gpucc-sm8150.c

@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2017-2020, 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-sm8150.h>
+
+#include "common.h"
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-pll.h"
+#include "clk-rcg.h"
+#include "clk-regmap.h"
+#include "reset.h"
+#include "gdsc.h"
+
+enum {
+	P_BI_TCXO,
+	P_CORE_BI_PLL_TEST_SE,
+	P_GPLL0_OUT_MAIN,
+	P_GPLL0_OUT_MAIN_DIV,
+	P_GPU_CC_PLL1_OUT_MAIN,
+};
+
+static const struct pll_vco trion_vco[] = {
+	{ 249600000, 2000000000, 0 },
+};
+
+static struct alpha_pll_config gpu_cc_pll1_config = {
+	.l = 0x1a,
+	.alpha = 0xaaa,
+	.config_ctl_val = 0x20485699,
+	.config_ctl_hi_val = 0x00002267,
+	.config_ctl_hi1_val = 0x00000024,
+	.test_ctl_val = 0x00000000,
+	.test_ctl_hi_val = 0x00000002,
+	.test_ctl_hi1_val = 0x00000000,
+	.user_ctl_val = 0x00000000,
+	.user_ctl_hi_val = 0x00000805,
+	.user_ctl_hi1_val = 0x000000d0,
+};
+
+static struct clk_alpha_pll gpu_cc_pll1 = {
+	.offset = 0x100,
+	.vco_table = trion_vco,
+	.num_vco = ARRAY_SIZE(trion_vco),
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_TRION],
+	.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_trion_ops,
+		},
+	},
+};
+
+static const struct parent_map gpu_cc_parent_map_0[] = {
+	{ P_BI_TCXO, 0 },
+	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
+	{ P_GPLL0_OUT_MAIN, 5 },
+	{ P_GPLL0_OUT_MAIN_DIV, 6 },
+};
+
+static const struct clk_parent_data gpu_cc_parent_data_0[] = {
+	{ .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_GPLL0_OUT_MAIN_DIV, 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),
+		.flags = CLK_SET_RATE_PARENT,
+		.ops = &clk_rcg2_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",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_crc_ahb_clk = {
+	.halt_reg = 0x107c,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x107c,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_crc_ahb_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch gpu_cc_cx_apb_clk = {
+	.halt_reg = 0x1088,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x1088,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gpu_cc_cx_apb_clk",
+			.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_data =  &(const struct clk_parent_data){
+				.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_cx_snoc_dvm_clk = {
+	.halt_reg = 0x108c,
+	.halt_check = BRANCH_HALT,
+	.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,
+	.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_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_data =  &(const struct clk_parent_data){
+				.hw = &gpu_cc_gmu_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct gdsc gpu_cx_gdsc = {
+	.gdscr = 0x106c,
+	.gds_hw_ctrl = 0x1540,
+	.pd = {
+		.name = "gpu_cx_gdsc",
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = VOTABLE,
+};
+
+static struct gdsc gpu_gx_gdsc = {
+	.gdscr = 0x100c,
+	.clamp_io_ctrl = 0x1508,
+	.pd = {
+		.name = "gpu_gx_gdsc",
+		.power_on = gdsc_gx_do_nothing_enable,
+	},
+	.pwrsts = PWRSTS_OFF_ON,
+	.flags = CLAMP_IO | AON_RESET | POLL_CFG_GDSCR,
+};
+
+static struct clk_regmap *gpu_cc_sm8150_clocks[] = {
+	[GPU_CC_AHB_CLK] = &gpu_cc_ahb_clk.clkr,
+	[GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
+	[GPU_CC_CX_APB_CLK] = &gpu_cc_cx_apb_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_PLL1] = &gpu_cc_pll1.clkr,
+};
+
+static const struct qcom_reset_map gpu_cc_sm8150_resets[] = {
+	[GPUCC_GPU_CC_CX_BCR] = { 0x1068 },
+	[GPUCC_GPU_CC_GMU_BCR] = { 0x111c },
+	[GPUCC_GPU_CC_GX_BCR] = { 0x1008 },
+	[GPUCC_GPU_CC_SPDM_BCR] = { 0x1110 },
+	[GPUCC_GPU_CC_XO_BCR] = { 0x1000 },
+};
+
+static struct gdsc *gpu_cc_sm8150_gdscs[] = {
+	[GPU_CX_GDSC] = &gpu_cx_gdsc,
+	[GPU_GX_GDSC] = &gpu_gx_gdsc,
+};
+
+static const struct regmap_config gpu_cc_sm8150_regmap_config = {
+	.reg_bits	= 32,
+	.reg_stride	= 4,
+	.val_bits	= 32,
+	.max_register	= 0x8008,
+	.fast_io	= true,
+};
+
+static const struct qcom_cc_desc gpu_cc_sm8150_desc = {
+	.config = &gpu_cc_sm8150_regmap_config,
+	.clks = gpu_cc_sm8150_clocks,
+	.num_clks = ARRAY_SIZE(gpu_cc_sm8150_clocks),
+	.resets = gpu_cc_sm8150_resets,
+	.num_resets = ARRAY_SIZE(gpu_cc_sm8150_resets),
+	.gdscs = gpu_cc_sm8150_gdscs,
+	.num_gdscs = ARRAY_SIZE(gpu_cc_sm8150_gdscs),
+};
+
+static const struct of_device_id gpu_cc_sm8150_match_table[] = {
+	{ .compatible = "qcom,sm8150-gpucc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, gpu_cc_sm8150_match_table);
+
+static int gpu_cc_sm8150_probe(struct platform_device *pdev)
+{
+	struct regmap *regmap;
+
+	regmap = qcom_cc_map(pdev, &gpu_cc_sm8150_desc);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	clk_trion_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll1_config);
+
+	return qcom_cc_really_probe(pdev, &gpu_cc_sm8150_desc, regmap);
+}
+
+static struct platform_driver gpu_cc_sm8150_driver = {
+	.probe = gpu_cc_sm8150_probe,
+	.driver = {
+		.name = "sm8150-gpucc",
+		.of_match_table = gpu_cc_sm8150_match_table,
+	},
+};
+
+static int __init gpu_cc_sm8150_init(void)
+{
+	return platform_driver_register(&gpu_cc_sm8150_driver);
+}
+subsys_initcall(gpu_cc_sm8150_init);
+
+static void __exit gpu_cc_sm8150_exit(void)
+{
+	platform_driver_unregister(&gpu_cc_sm8150_driver);
+}
+module_exit(gpu_cc_sm8150_exit);
+
+MODULE_DESCRIPTION("QTI GPUCC SM8150 Driver");
+MODULE_LICENSE("GPL v2");