[PATCH v1 1/2] dt-bindings: clock: Add YAML schemas for LPASS clocks on SC7280

@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,sc7280-lpasscc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm LPASS Core Clock Controller Binding for SC7280
+
+maintainers:
+  - Taniya Das <tdas@codeaurora.org>
+
+description: |
+  Qualcomm LPASS core clock control module which supports the clocks and
+  power domains on SC7280.
+
+  See also:
+  - dt-bindings/clock/qcom,lpass-sc7280.h
+
+properties:
+  compatible:
+    enum:
+      - qcom,sc7280-lpasscc
+
+  clocks:
+    items:
+      - description: gcc_cfg_noc_lpass_clk from GCC
+
+  clock-names:
+    items:
+      - const: iface
+
+  '#clock-cells':
+    const: 1
+
+  reg:
+    minItems: 3
+    items:
+      - description: LPASS qdsp6ss register
+      - description: LPASS top-cc register
+      - description: LPASS cc register
+
+  reg-names:
+    items:
+      - const: qdsp6ss
+      - const: top_cc
+      - const: cc
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-sc7280.h>
+    #include <dt-bindings/clock/qcom,lpass-sc7280.h>
+    clock-controller@3000000 {
+      compatible = "qcom,sc7280-lpasscc";
+      reg = <0x03000000 0x40>, <0x03c04000 0x4>, <0x03389000 0x24>;
+      reg-names = "qdsp6ss", "top_cc", "cc";
+      clocks = <&gcc GCC_CFG_NOC_LPASS_CLK>;
+      clock-names = "iface";
+      #clock-cells = <1>;
+    };
+...

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_CLK_QCOM_LPASS_SC7280_H
+#define _DT_BINDINGS_CLK_QCOM_LPASS_SC7280_H
+
+#define LPASS_Q6SS_AHBM_CLK				0
+#define LPASS_Q6SS_AHBS_CLK				1
+#define LPASS_TOP_CC_LPI_Q6_AXIM_HS_CLK			2
+#define LPASS_QDSP6SS_XO_CLK				3
+#define LPASS_QDSP6SS_SLEEP_CLK				4
+#define LPASS_QDSP6SS_CORE_CLK				5
+
+#endif

@@ -394,6 +394,14 @@ config SC_LPASS_CORECC_7180
 	  Say Y if you want to use LPASS clocks and power domains of the LPASS
 	  core clock controller.
 
+config SC_LPASSCC_7280
+	tristate "SC7280 Low Power Audio Subsystem (LPAAS) Clock Controller"
+	select SC_GCC_7280
+	help
+	  Support for the LPASS clock controller on SC7280 devices.
+	  Say Y if you want to use the LPASS branch clocks of the LPASS clock
+	  controller to reset the LPASS subsystem.
+
 config SC_GPUCC_7180
 	tristate "SC7180 Graphics Clock Controller"
 	select SC_GCC_7180

@@ -66,6 +66,7 @@ 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-$(CONFIG_SC_LPASSCC_7280) += lpasscc-sc7280.o
 obj-$(CONFIG_SC_MSS_7180) += mss-sc7180.o
 obj-$(CONFIG_SC_VIDEOCC_7180) += videocc-sc7180.o
 obj-$(CONFIG_SC_VIDEOCC_7280) += videocc-sc7280.o

@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,lpass-sc7280.h>
+
+#include "clk-regmap.h"
+#include "clk-branch.h"
+#include "common.h"
+
+static struct clk_branch lpass_q6ss_ahbm_clk = {
+	.halt_reg = 0x1c,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x1c,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "lpass_q6ss_ahbm_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch lpass_q6ss_ahbs_clk = {
+	.halt_reg = 0x20,
+	.halt_check = BRANCH_HALT_VOTED,
+	.clkr = {
+		.enable_reg = 0x20,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "lpass_q6ss_ahbs_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch lpass_top_cc_lpi_q6_axim_hs_clk = {
+	.halt_reg = 0x0,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x0,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "lpass_top_cc_lpi_q6_axim_hs_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch lpass_qdsp6ss_core_clk = {
+	.halt_reg = 0x20,
+	/* CLK_OFF would not toggle until LPASS is out of reset */
+	.halt_check = BRANCH_HALT_SKIP,
+	.clkr = {
+		.enable_reg = 0x20,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "lpass_qdsp6ss_core_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch lpass_qdsp6ss_xo_clk = {
+	.halt_reg = 0x38,
+	/* CLK_OFF would not toggle until LPASS is out of reset */
+	.halt_check = BRANCH_HALT_SKIP,
+	.clkr = {
+		.enable_reg = 0x38,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "lpass_qdsp6ss_xo_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch lpass_qdsp6ss_sleep_clk = {
+	.halt_reg = 0x3c,
+	/* CLK_OFF would not toggle until LPASS is out of reset */
+	.halt_check = BRANCH_HALT_SKIP,
+	.clkr = {
+		.enable_reg = 0x3c,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "lpass_qdsp6ss_sleep_clk",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct regmap_config lpass_regmap_config = {
+	.reg_bits	= 32,
+	.reg_stride	= 4,
+	.val_bits	= 32,
+	.fast_io	= true,
+};
+
+static struct clk_regmap *lpass_cc_sc7280_clocks[] = {
+	[LPASS_Q6SS_AHBM_CLK] = &lpass_q6ss_ahbm_clk.clkr,
+	[LPASS_Q6SS_AHBS_CLK] = &lpass_q6ss_ahbs_clk.clkr,
+};
+
+static const struct qcom_cc_desc lpass_cc_sc7280_desc = {
+	.config = &lpass_regmap_config,
+	.clks = lpass_cc_sc7280_clocks,
+	.num_clks = ARRAY_SIZE(lpass_cc_sc7280_clocks),
+};
+
+static struct clk_regmap *lpass_cc_top_sc7280_clocks[] = {
+	[LPASS_TOP_CC_LPI_Q6_AXIM_HS_CLK] =
+				&lpass_top_cc_lpi_q6_axim_hs_clk.clkr,
+};
+
+static const struct qcom_cc_desc lpass_cc_top_sc7280_desc = {
+	.config = &lpass_regmap_config,
+	.clks = lpass_cc_top_sc7280_clocks,
+	.num_clks = ARRAY_SIZE(lpass_cc_top_sc7280_clocks),
+};
+
+static struct clk_regmap *lpass_qdsp6ss_sc7280_clocks[] = {
+	[LPASS_QDSP6SS_XO_CLK] = &lpass_qdsp6ss_xo_clk.clkr,
+	[LPASS_QDSP6SS_SLEEP_CLK] = &lpass_qdsp6ss_sleep_clk.clkr,
+	[LPASS_QDSP6SS_CORE_CLK] = &lpass_qdsp6ss_core_clk.clkr,
+};
+
+static const struct qcom_cc_desc lpass_qdsp6ss_sc7280_desc = {
+	.config = &lpass_regmap_config,
+	.clks = lpass_qdsp6ss_sc7280_clocks,
+	.num_clks = ARRAY_SIZE(lpass_qdsp6ss_sc7280_clocks),
+};
+
+static int lpass_cc_sc7280_probe(struct platform_device *pdev)
+{
+	const struct qcom_cc_desc *desc;
+	int ret;
+
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_clk_create(&pdev->dev);
+	if (ret)
+		goto disable_pm_runtime;
+
+	ret = pm_clk_add(&pdev->dev, "iface");
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to acquire iface clock\n");
+		goto destroy_pm_clk;
+	}
+
+	lpass_regmap_config.name = "qdsp6ss";
+	desc = &lpass_qdsp6ss_sc7280_desc;
+
+	ret = qcom_cc_probe_by_index(pdev, 0, desc);
+	if (ret)
+		goto destroy_pm_clk;
+
+	lpass_regmap_config.name = "top_cc";
+	desc = &lpass_cc_top_sc7280_desc;
+
+	ret = qcom_cc_probe_by_index(pdev, 1, desc);
+	if (ret)
+		goto destroy_pm_clk;
+
+	lpass_regmap_config.name = "cc";
+	desc = &lpass_cc_sc7280_desc;
+
+	ret = qcom_cc_probe_by_index(pdev, 2, desc);
+	if (ret)
+		goto destroy_pm_clk;
+
+	return 0;
+
+destroy_pm_clk:
+	pm_clk_destroy(&pdev->dev);
+
+disable_pm_runtime:
+	pm_runtime_disable(&pdev->dev);
+
+	return ret;
+}
+
+static const struct of_device_id lpass_cc_sc7280_match_table[] = {
+	{ .compatible = "qcom,sc7280-lpasscc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, lpass_cc_sc7280_match_table);
+
+static struct platform_driver lpass_cc_sc7280_driver = {
+	.probe		= lpass_cc_sc7280_probe,
+	.driver		= {
+		.name	= "sc7280-lpasscc",
+		.of_match_table = lpass_cc_sc7280_match_table,
+	},
+};
+
+static int __init lpass_cc_sc7280_init(void)
+{
+	return platform_driver_register(&lpass_cc_sc7280_driver);
+}
+subsys_initcall(lpass_cc_sc7280_init);
+
+static void __exit lpass_cc_sc7280_exit(void)
+{
+	platform_driver_unregister(&lpass_cc_sc7280_driver);
+}
+module_exit(lpass_cc_sc7280_exit);
+
+MODULE_DESCRIPTION("QTI LPASS_CC SC7280 Driver");
+MODULE_LICENSE("GPL v2");