[PATCH v4 3/7] clk: qcom: Add TCSR clock driver for Glymur SoC

[Taniya Das <taniya.das@oss.qualcomm.com>]

Add a clock driver for the TCSR clock controller found on Glymur SoC,
which provides refclks for PCIE, USB, and UFS subsystems.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 drivers/clk/qcom/Kconfig         |   8 +
 drivers/clk/qcom/Makefile        |   1 +
 drivers/clk/qcom/tcsrcc-glymur.c | 313 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 322 insertions(+)

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 6cb6cd3e1778ad3f2b6af3b8ebf22c7fb927cfe9..60fdda23674244adf9d7cefa896a887d9c8eb885 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -19,6 +19,14 @@ menuconfig COMMON_CLK_QCOM
 
 if COMMON_CLK_QCOM
 
+config CLK_GLYMUR_TCSRCC
+	tristate "GLYMUR TCSR Clock Controller"
+	depends on ARM64 || COMPILE_TEST
+	select QCOM_GDSC
+	help
+	  Support for the TCSR clock controller on GLYMUR devices.
+	  Say Y if you want to use peripheral devices such as USB/PCIe/EDP.
+
 config CLK_X1E80100_CAMCC
 	tristate "X1E80100 Camera Clock Controller"
 	depends on ARM64 || COMPILE_TEST
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index ddb7e06fae405de33c1cd4a68f4cf976f503c930..6a1099600fdd411c105489fb1bba6235dd77f380 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -21,6 +21,7 @@ clk-qcom-$(CONFIG_QCOM_GDSC) += gdsc.o
 obj-$(CONFIG_APQ_GCC_8084) += gcc-apq8084.o
 obj-$(CONFIG_APQ_MMCC_8084) += mmcc-apq8084.o
 obj-$(CONFIG_CLK_GFM_LPASS_SM8250) += lpass-gfm-sm8250.o
+obj-$(CONFIG_CLK_GLYMUR_TCSRCC) += tcsrcc-glymur.o
 obj-$(CONFIG_CLK_X1E80100_CAMCC) += camcc-x1e80100.o
 obj-$(CONFIG_CLK_X1E80100_DISPCC) += dispcc-x1e80100.o
 obj-$(CONFIG_CLK_X1E80100_GCC) += gcc-x1e80100.o
diff --git a/drivers/clk/qcom/tcsrcc-glymur.c b/drivers/clk/qcom/tcsrcc-glymur.c
new file mode 100644
index 0000000000000000000000000000000000000000..c1f8b6d10b7fd6eaef0149843594fc7eb6a620ec
--- /dev/null
+++ b/drivers/clk/qcom/tcsrcc-glymur.c
@@ -0,0 +1,313 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2025, Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,glymur-tcsr.h>
+
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-pll.h"
+#include "clk-rcg.h"
+#include "clk-regmap.h"
+#include "clk-regmap-divider.h"
+#include "clk-regmap-mux.h"
+#include "common.h"
+#include "gdsc.h"
+#include "reset.h"
+
+enum {
+	DT_BI_TCXO_PAD,
+};
+
+static struct clk_branch tcsr_edp_clkref_en = {
+	.halt_reg = 0x1c,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x1c,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_edp_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_pcie_1_clkref_en = {
+	.halt_reg = 0x4,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x4,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_pcie_1_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_pcie_2_clkref_en = {
+	.halt_reg = 0x8,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x8,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_pcie_2_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_pcie_3_clkref_en = {
+	.halt_reg = 0x10,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x10,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_pcie_3_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_pcie_4_clkref_en = {
+	.halt_reg = 0x14,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x14,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_pcie_4_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb2_1_clkref_en = {
+	.halt_reg = 0x28,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x28,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb2_1_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb2_2_clkref_en = {
+	.halt_reg = 0x2c,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x2c,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb2_2_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb2_3_clkref_en = {
+	.halt_reg = 0x30,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x30,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb2_3_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb2_4_clkref_en = {
+	.halt_reg = 0x44,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x44,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb2_4_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb3_0_clkref_en = {
+	.halt_reg = 0x20,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x20,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb3_0_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb3_1_clkref_en = {
+	.halt_reg = 0x24,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x24,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb3_1_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb4_1_clkref_en = {
+	.halt_reg = 0x0,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x0,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb4_1_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch tcsr_usb4_2_clkref_en = {
+	.halt_reg = 0x18,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x18,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_usb4_2_clkref_en",
+			.parent_data = &(const struct clk_parent_data){
+				.index = DT_BI_TCXO_PAD,
+			},
+			.num_parents = 1,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_regmap *tcsr_cc_glymur_clocks[] = {
+	[TCSR_EDP_CLKREF_EN] = &tcsr_edp_clkref_en.clkr,
+	[TCSR_PCIE_1_CLKREF_EN] = &tcsr_pcie_1_clkref_en.clkr,
+	[TCSR_PCIE_2_CLKREF_EN] = &tcsr_pcie_2_clkref_en.clkr,
+	[TCSR_PCIE_3_CLKREF_EN] = &tcsr_pcie_3_clkref_en.clkr,
+	[TCSR_PCIE_4_CLKREF_EN] = &tcsr_pcie_4_clkref_en.clkr,
+	[TCSR_USB2_1_CLKREF_EN] = &tcsr_usb2_1_clkref_en.clkr,
+	[TCSR_USB2_2_CLKREF_EN] = &tcsr_usb2_2_clkref_en.clkr,
+	[TCSR_USB2_3_CLKREF_EN] = &tcsr_usb2_3_clkref_en.clkr,
+	[TCSR_USB2_4_CLKREF_EN] = &tcsr_usb2_4_clkref_en.clkr,
+	[TCSR_USB3_0_CLKREF_EN] = &tcsr_usb3_0_clkref_en.clkr,
+	[TCSR_USB3_1_CLKREF_EN] = &tcsr_usb3_1_clkref_en.clkr,
+	[TCSR_USB4_1_CLKREF_EN] = &tcsr_usb4_1_clkref_en.clkr,
+	[TCSR_USB4_2_CLKREF_EN] = &tcsr_usb4_2_clkref_en.clkr,
+};
+
+static const struct regmap_config tcsr_cc_glymur_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0x44,
+	.fast_io = true,
+};
+
+static const struct qcom_cc_desc tcsr_cc_glymur_desc = {
+	.config = &tcsr_cc_glymur_regmap_config,
+	.clks = tcsr_cc_glymur_clocks,
+	.num_clks = ARRAY_SIZE(tcsr_cc_glymur_clocks),
+};
+
+static const struct of_device_id tcsr_cc_glymur_match_table[] = {
+	{ .compatible = "qcom,glymur-tcsr" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tcsr_cc_glymur_match_table);
+
+static int tcsr_cc_glymur_probe(struct platform_device *pdev)
+{
+	return qcom_cc_probe(pdev, &tcsr_cc_glymur_desc);
+}
+
+static struct platform_driver tcsr_cc_glymur_driver = {
+	.probe = tcsr_cc_glymur_probe,
+	.driver = {
+		.name = "tcsrcc-glymur",
+		.of_match_table = tcsr_cc_glymur_match_table,
+	},
+};
+
+static int __init tcsr_cc_glymur_init(void)
+{
+	return platform_driver_register(&tcsr_cc_glymur_driver);
+}
+subsys_initcall(tcsr_cc_glymur_init);
+
+static void __exit tcsr_cc_glymur_exit(void)
+{
+	platform_driver_unregister(&tcsr_cc_glymur_driver);
+}
+module_exit(tcsr_cc_glymur_exit);
+
+MODULE_DESCRIPTION("QTI TCSRCC GLYMUR Driver");
+MODULE_LICENSE("GPL");

-- 
2.34.1