[PATCH v2 3/4] clk: qcom: Add lpass audio clock controller driver for Glymur

[Srinivas Kandagatla]

Add support for the lpass audio clock controller found on Glymur based
devices. This would allow lpass peripheral loader drivers to control the
clocks and bring the subsystems out of reset.

Currently this patch only supports resets as the Q6DSP is in control of
LPASS IP which manages most of the clocks via Q6PRM service on GPR rpmsg
channel.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxxxxxxxx>
Reviewed-by: Abel Vesa <abel.vesa@xxxxxxxxxxxxxxxx>
---
 drivers/clk/qcom/Kconfig          | 11 +++++
 drivers/clk/qcom/Makefile         |  1 +
 drivers/clk/qcom/lpasscc-glymur.c | 68 +++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+)
 create mode 100644 drivers/clk/qcom/lpasscc-glymur.c

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 3bf39a2c54c8..c9f5daed0e14 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -1264,6 +1264,17 @@ config SC_LPASSCC_8280XP
 	  Say Y if you want to use the LPASS branch clocks of the LPASS clock
 	  controller to reset the LPASS subsystem.
 
+config SC_LPASSCC_GLYMUR
+	tristate "GLYMUR Low Power Audio Subsystem (LPASS) Clock Controller"
+	depends on ARM64 || COMPILE_TEST
+	default m if ARCH_QCOM
+	help
+	  Support for the LPASS clock controller on Glymur devices.
+	  Say Y if you want to use the LPASS branch clocks of the LPASS clock
+	  controller to reset the LPASS subsystem.  Required for the LPASS
+	  audio macros and the SoundWire compute-mode controller to leave
+	  reset on Glymur.
+
 config SC_LPASS_CORECC_7180
 	tristate "SC7180 LPASS Core Clock Controller"
 	depends on ARM64 || COMPILE_TEST
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index bd70e18a7118..2bad94a1d982 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -150,6 +150,7 @@ obj-$(CONFIG_SC_LPASSCC_7280) += lpasscc-sc7280.o
 obj-$(CONFIG_SC_LPASSCC_8280XP) += lpasscc-sc8280xp.o
 obj-$(CONFIG_SC_LPASS_CORECC_7180) += lpasscorecc-sc7180.o
 obj-$(CONFIG_SC_LPASS_CORECC_7280) += lpasscorecc-sc7280.o lpassaudiocc-sc7280.o
+obj-$(CONFIG_SC_LPASSCC_GLYMUR) += lpasscc-glymur.o
 obj-$(CONFIG_SC_VIDEOCC_7180) += videocc-sc7180.o
 obj-$(CONFIG_SC_VIDEOCC_7280) += videocc-sc7280.o
 obj-$(CONFIG_SDM_CAMCC_845) += camcc-sdm845.o
diff --git a/drivers/clk/qcom/lpasscc-glymur.c b/drivers/clk/qcom/lpasscc-glymur.c
new file mode 100644
index 000000000000..356625dce99e
--- /dev/null
+++ b/drivers/clk/qcom/lpasscc-glymur.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,glymur-lpasscc.h>
+
+#include "common.h"
+#include "reset.h"
+
+static const struct qcom_reset_map lpass_audiocc_glymur_resets[] = {
+	[LPASS_AUDIO_SWR_RX_CGCR] = { 0xa0, 1 },
+	[LPASS_AUDIO_SWR_WSA1_CGCR] = { 0xb0, 1 },
+	[LPASS_AUDIO_SWR_WSA2_CGCR] = { 0xd8, 1 },
+	[LPASS_AUDIO_SWR_WSA3_CGCR] = { 0x300c, 1 },
+	[LPASS_AUDIO_SWR_WSA4_CGCR] = { 0x301c, 1 },
+};
+
+static const struct regmap_config lpass_audiocc_glymur_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_glymur_reset_desc = {
+	.config = &lpass_audiocc_glymur_regmap_config,
+	.resets = lpass_audiocc_glymur_resets,
+	.num_resets = ARRAY_SIZE(lpass_audiocc_glymur_resets),
+};
+
+static const struct of_device_id lpasscc_glymur_match_table[] = {
+	{
+		.compatible = "qcom,glymur-lpassaudiocc",
+		.data = &lpass_audiocc_glymur_reset_desc,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, lpasscc_glymur_match_table);
+
+static int lpasscc_glymur_probe(struct platform_device *pdev)
+{
+	const struct qcom_cc_desc *desc = device_get_match_data(&pdev->dev);
+
+	return qcom_cc_probe_by_index(pdev, 0, desc);
+}
+
+static struct platform_driver lpasscc_glymur_driver = {
+	.probe = lpasscc_glymur_probe,
+	.driver = {
+		.name = "lpasscc-glymur",
+		.of_match_table = lpasscc_glymur_match_table,
+	},
+};
+
+module_platform_driver(lpasscc_glymur_driver);
+
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("QTI LPASSCC Glymur Driver");
+MODULE_LICENSE("GPL");
-- 
2.53.0