clk: qcom: sc8280xp: add lpass csr driver

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

4 files changed, 119 insertions, 0 deletions

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 70d43f0a8919..24b89b5ec8c5 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -410,6 +410,14 @@ config SC_DISPCC_8280XP
 	  Say Y if you want to support display devices and functionality such as
 	  splash screen.
 
+config SC_LPASSCSR_8280XP
+	tristate "SC8280 Low Power Audio Subsystem (LPASS) Clock Controller"
+	select SC_GCC_8280XP
+	help
+	  Support for the LPASS clock controller on SC8280XP devices.
+	  Say Y if you want to use the LPASS branch clocks of the LPASS clock
+	  controller to reset the LPASS subsystem.
+
 config SC_GCC_7180
 	tristate "SC7180 Global Clock Controller"
 	select QCOM_GDSC
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index f18c446a97ea..3797ea9502b2 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_SC_CAMCC_7280) += camcc-sc7280.o
 obj-$(CONFIG_SC_DISPCC_7180) += dispcc-sc7180.o
 obj-$(CONFIG_SC_DISPCC_7280) += dispcc-sc7280.o
 obj-$(CONFIG_SC_DISPCC_8280XP) += dispcc-sc8280xp.o
+obj-$(CONFIG_SC_LPASSCSR_8280XP) += lpass-csr-sc8280xp.o
 obj-$(CONFIG_SC_GCC_7180) += gcc-sc7180.o
 obj-$(CONFIG_SC_GCC_7280) += gcc-sc7280.o
 obj-$(CONFIG_SC_GCC_8180X) += gcc-sc8180x.o
diff --git a/drivers/clk/qcom/lpass-csr-sc8280xp.c b/drivers/clk/qcom/lpass-csr-sc8280xp.c
new file mode 100644
index 000000000000..88a86b22b787
--- /dev/null
+++ b/drivers/clk/qcom/lpass-csr-sc8280xp.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022, Linaro Limited
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <dt-bindings/clock/qcom,lpass-csr-sc8280xp.h>
+#include "common.h"
+#include "reset.h"
+
+static const struct qcom_reset_map lpass_audio_csr_sc8280xp_resets[] = {
+	[LPASS_AUDIO_SWR_RX_CGCR] =  { 0xa0, 1 },
+	[LPASS_AUDIO_SWR_WSA_CGCR] = { 0xb0, 1 },
+	[LPASS_AUDIO_SWR_WSA2_CGCR] =  { 0xd8, 1 },
+};
+
+static struct regmap_config lpass_audio_csr_sc8280xp_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_audio_csr_reset_sc8280xp_desc = {
+	.config = &lpass_audio_csr_sc8280xp_regmap_config,
+	.resets = lpass_audio_csr_sc8280xp_resets,
+	.num_resets = ARRAY_SIZE(lpass_audio_csr_sc8280xp_resets),
+};
+
+static const struct qcom_reset_map lpass_tcsr_sc8280xp_resets[] = {
+	[LPASS_AUDIO_SWR_TX_CGCR] = { 0xc010, 1 },
+};
+
+static struct regmap_config lpass_tcsr_sc8280xp_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.name = "lpass-tcsr",
+	.max_register = 0x21000,
+};
+
+static const struct qcom_cc_desc lpass_tcsr_reset_sc8280xp_desc = {
+	.config = &lpass_tcsr_sc8280xp_regmap_config,
+	.resets = lpass_tcsr_sc8280xp_resets,
+	.num_resets = ARRAY_SIZE(lpass_tcsr_sc8280xp_resets),
+};
+
+static const struct of_device_id lpass_audio_csr_sc8280xp_match_table[] = {
+	{	.compatible = "qcom,sc8280xp-lpass-audio-csr",
+		.data = &lpass_audio_csr_reset_sc8280xp_desc,
+	}, {
+		.compatible = "qcom,sc8280xp-lpass-tcsr",
+		.data = &lpass_tcsr_reset_sc8280xp_desc,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, lpass_audio_csr_sc8280xp_match_table);
+
+static int lpass_audio_csr_sc8280xp_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 lpass_audio_csr_sc8280xp_driver = {
+	.probe = lpass_audio_csr_sc8280xp_probe,
+	.driver = {
+		.name = "lpass-csr-sc8280xp",
+		.of_match_table = lpass_audio_csr_sc8280xp_match_table,
+	},
+};
+
+static int __init lpass_audio_csr_sc8280xp_init(void)
+{
+	return platform_driver_register(&lpass_audio_csr_sc8280xp_driver);
+}
+subsys_initcall(lpass_audio_csr_sc8280xp_init);
+
+static void __exit lpass_audio_csr_sc8280xp_exit(void)
+{
+	platform_driver_unregister(&lpass_audio_csr_sc8280xp_driver);
+}
+module_exit(lpass_audio_csr_sc8280xp_exit);
+
+MODULE_DESCRIPTION("QTI LPASS CSR SC8280XP Driver");
+MODULE_LICENSE("GPL");
diff --git a/include/dt-bindings/clock/qcom,lpass-csr-sc8280xp.h b/include/dt-bindings/clock/qcom,lpass-csr-sc8280xp.h
new file mode 100644
index 000000000000..bfdc26e7df74
--- /dev/null
+++ b/include/dt-bindings/clock/qcom,lpass-csr-sc8280xp.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (c) 2022, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_CLK_QCOM_LPASS_AUDIO_CC_SC8280XP_H
+#define _DT_BINDINGS_CLK_QCOM_LPASS_AUDIO_CC_SC8280XP_H
+
+/* LPASS AUDIO CC CSR */
+#define LPASS_AUDIO_SWR_RX_CGCR				0
+#define LPASS_AUDIO_SWR_WSA_CGCR			1
+#define LPASS_AUDIO_SWR_WSA2_CGCR			2
+
+/* LPASS TCSR */
+#define LPASS_AUDIO_SWR_TX_CGCR				0
+
+#endif