clk: qcom: Add Hawi TCSR clock controller driver

Add support for the TCSR clock controller found on the Qualcomm Hawi SoC.
This controller provides reference clocks for various peripherals
including PCIe, UFS, and USB.

Reviewed-by: Taniya Das <taniya.das@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Mike Tipton <mike.tipton@oss.qualcomm.com>
Signed-off-by: Vivek Aknurwar <vivek.aknurwar@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260506-clk-hawi-v3-5-530b538679f1@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

drivers/clk/qcom/Kconfig

@@ -296,6 +296,13 @@ config QCOM_CLK_RPMH
 	 Say Y if you want to support the clocks exposed by RPMh on
 	 platforms such as SDM845.
 
+config CLK_HAWI_TCSRCC
+	tristate "Hawi TCSR Clock Controller"
+	depends on ARM64 || COMPILE_TEST
+	help
+	  Support for the TCSR clock controller on Hawi devices.
+	  Say Y if you want to use peripheral devices such as PCIe, USB, UFS.
+
 config APQ_GCC_8084
 	tristate "APQ8084 Global Clock Controller"
 	depends on ARM || COMPILE_TEST

drivers/clk/qcom/Makefile

@@ -29,6 +29,7 @@ obj-$(CONFIG_CLK_GLYMUR_GCC) += gcc-glymur.o
 obj-$(CONFIG_CLK_GLYMUR_GPUCC) += gpucc-glymur.o gxclkctl-kaanapali.o
 obj-$(CONFIG_CLK_GLYMUR_TCSRCC) += tcsrcc-glymur.o
 obj-$(CONFIG_CLK_GLYMUR_VIDEOCC) += videocc-glymur.o
+obj-$(CONFIG_CLK_HAWI_TCSRCC) += tcsrcc-hawi.o
 obj-$(CONFIG_CLK_KAANAPALI_CAMCC) += cambistmclkcc-kaanapali.o camcc-kaanapali.o
 obj-$(CONFIG_CLK_KAANAPALI_DISPCC) += dispcc-kaanapali.o
 obj-$(CONFIG_CLK_KAANAPALI_GCC) += gcc-kaanapali.o

drivers/clk/qcom/tcsrcc-hawi.c

@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 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,hawi-tcsrcc.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 "reset.h"
+
+enum {
+	DT_BI_TCXO_PAD,
+};
+
+static struct clk_branch tcsr_pcie_0_clkref_en = {
+	.halt_reg = 0x4c,
+	.halt_check = BRANCH_HALT_DELAY,
+	.clkr = {
+		.enable_reg = 0x4c,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data) {
+			.name = "tcsr_pcie_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_pcie_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_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_ufs_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_ufs_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_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_usb2_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_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_usb3_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_hawi_clocks[] = {
+	[TCSR_PCIE_0_CLKREF_EN] = &tcsr_pcie_0_clkref_en.clkr,
+	[TCSR_PCIE_1_CLKREF_EN] = &tcsr_pcie_1_clkref_en.clkr,
+	[TCSR_UFS_CLKREF_EN] = &tcsr_ufs_clkref_en.clkr,
+	[TCSR_USB2_CLKREF_EN] = &tcsr_usb2_clkref_en.clkr,
+	[TCSR_USB3_CLKREF_EN] = &tcsr_usb3_clkref_en.clkr,
+};
+
+static const struct regmap_config tcsr_cc_hawi_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0x4c,
+	.fast_io = true,
+};
+
+static const struct qcom_cc_desc tcsr_cc_hawi_desc = {
+	.config = &tcsr_cc_hawi_regmap_config,
+	.clks = tcsr_cc_hawi_clocks,
+	.num_clks = ARRAY_SIZE(tcsr_cc_hawi_clocks),
+};
+
+static const struct of_device_id tcsr_cc_hawi_match_table[] = {
+	{ .compatible = "qcom,hawi-tcsrcc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tcsr_cc_hawi_match_table);
+
+static int tcsr_cc_hawi_probe(struct platform_device *pdev)
+{
+	return qcom_cc_probe(pdev, &tcsr_cc_hawi_desc);
+}
+
+static struct platform_driver tcsr_cc_hawi_driver = {
+	.probe = tcsr_cc_hawi_probe,
+	.driver = {
+		.name = "tcsrcc-hawi",
+		.of_match_table = tcsr_cc_hawi_match_table,
+	},
+};
+
+module_platform_driver(tcsr_cc_hawi_driver);
+
+MODULE_DESCRIPTION("QTI TCSRCC HAWI Driver");
+MODULE_LICENSE("GPL");