linux-kernel - [PATCH v1 2/2] clk: qcom: Add SM6115 LPASSCC

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Message-ID: <20241017005800.1175419-3-alexey.klimov@linaro.org>
Date: Thu, 17 Oct 2024 01:58:00 +0100
From: Alexey Klimov <alexey.klimov@...aro.org>
To: konradybcio@...nel.org,
	konrad.dybcio@....qualcomm.com,
	andersson@...nel.org,
	mturquette@...libre.com,
	sboyd@...nel.org,
	krzk+dt@...nel.org
Cc: robh@...nel.org,
	conor+dt@...nel.org,
	srinivas.kandagatla@...aro.org,
	linux-arm-msm@...r.kernel.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/2] clk: qcom: Add SM6115 LPASSCC

From: Konrad Dybcio <konrad.dybcio@...aro.org>

SM6115 (and its derivatives or similar SoCs) has an LPASS clock
controller block which provides audio-related resets.

Add the required code to support them.

Cc: Konrad Dybcio <konradybcio@...nel.org>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
[alexey.klimov] fixed compilation errors after rebase,
slightly changed the commit message
Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
---
 drivers/clk/qcom/Kconfig          |  9 ++++
 drivers/clk/qcom/Makefile         |  1 +
 drivers/clk/qcom/lpasscc-sm6115.c | 85 +++++++++++++++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 drivers/clk/qcom/lpasscc-sm6115.c

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 30eb8236c9d8..b6b68fc5c3f7 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -1173,6 +1173,15 @@ config SM_GPUCC_8650
 	  Say Y if you want to support graphics controller devices and
 	  functionality such as 3D graphics.
 
+config SM_LPASSCC_6115
+	tristate "SM6115 Low Power Audio Subsystem (LPASS) Clock Controller"
+	depends on ARM64 || COMPILE_TEST
+	select SM_GCC_6115
+	help
+	  Support for the LPASS clock controller on SM6115 devices.
+	  Say Y if you want to toggle LPASS-adjacent resets within
+	  this clock controller to reset the LPASS subsystem.
+
 config SM_TCSRCC_8550
 	tristate "SM8550 TCSR Clock Controller"
 	depends on ARM64 || COMPILE_TEST
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 2b378667a63f..16e65148066e 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -147,6 +147,7 @@ obj-$(CONFIG_SM_GPUCC_8350) += gpucc-sm8350.o
 obj-$(CONFIG_SM_GPUCC_8450) += gpucc-sm8450.o
 obj-$(CONFIG_SM_GPUCC_8550) += gpucc-sm8550.o
 obj-$(CONFIG_SM_GPUCC_8650) += gpucc-sm8650.o
+obj-$(CONFIG_SM_LPASSCC_6115) += lpasscc-sm6115.o
 obj-$(CONFIG_SM_TCSRCC_8550) += tcsrcc-sm8550.o
 obj-$(CONFIG_SM_TCSRCC_8650) += tcsrcc-sm8650.o
 obj-$(CONFIG_SM_VIDEOCC_7150) += videocc-sm7150.o
diff --git a/drivers/clk/qcom/lpasscc-sm6115.c b/drivers/clk/qcom/lpasscc-sm6115.c
new file mode 100644
index 000000000000..8ffdab71b948
--- /dev/null
+++ b/drivers/clk/qcom/lpasscc-sm6115.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022, 2023 Linaro Limited
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,sm6115-lpasscc.h>
+
+#include "common.h"
+#include "reset.h"
+
+static const struct qcom_reset_map lpass_audiocc_sm6115_resets[] = {
+	[LPASS_AUDIO_SWR_RX_CGCR] =  { .reg = 0x98, .bit = 1, .udelay = 500 },
+};
+
+static struct regmap_config lpass_audiocc_sm6115_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.name = "lpass-audio-csr",
+	.max_register = 0x1000,
+};
+
+static const struct qcom_cc_desc lpass_audiocc_sm6115_reset_desc = {
+	.config = &lpass_audiocc_sm6115_regmap_config,
+	.resets = lpass_audiocc_sm6115_resets,
+	.num_resets = ARRAY_SIZE(lpass_audiocc_sm6115_resets),
+};
+
+static const struct qcom_reset_map lpasscc_sm6115_resets[] = {
+	[LPASS_SWR_TX_CONFIG_CGCR] = { .reg = 0x100, .bit = 1, .udelay = 500 },
+};
+
+static struct regmap_config lpasscc_sm6115_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.name = "lpass-tcsr",
+	.max_register = 0x1000,
+};
+
+static const struct qcom_cc_desc lpasscc_sm6115_reset_desc = {
+	.config = &lpasscc_sm6115_regmap_config,
+	.resets = lpasscc_sm6115_resets,
+	.num_resets = ARRAY_SIZE(lpasscc_sm6115_resets),
+};
+
+static const struct of_device_id lpasscc_sm6115_match_table[] = {
+	{
+		.compatible = "qcom,sm6115-lpassaudiocc",
+		.data = &lpass_audiocc_sm6115_reset_desc,
+	}, {
+		.compatible = "qcom,sm6115-lpasscc",
+		.data = &lpasscc_sm6115_reset_desc,
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, lpasscc_sm6115_match_table);
+
+static int lpasscc_sm6115_probe(struct platform_device *pdev)
+{
+	const struct qcom_cc_desc *desc = of_device_get_match_data(&pdev->dev);
+
+	return qcom_cc_probe_by_index(pdev, 0, desc);
+}
+
+static struct platform_driver lpasscc_sm6115_driver = {
+	.probe = lpasscc_sm6115_probe,
+	.driver = {
+		.name = "lpasscc-sm6115",
+		.of_match_table = lpasscc_sm6115_match_table,
+	},
+};
+
+module_platform_driver(lpasscc_sm6115_driver);
+
+MODULE_DESCRIPTION("QTI LPASSCC SM6115 Driver");
+MODULE_LICENSE("GPL");
-- 
2.45.2