clk: qcom: Add lpass clock controller driver for SC8280XP
authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Thu, 8 Jun 2023 12:53:12 +0000 (13:53 +0100)
committerBjorn Andersson <andersson@kernel.org>
Tue, 13 Jun 2023 18:14:04 +0000 (11:14 -0700)
Add support for the lpass clock controller found on SC8280XP 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@linaro.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230608125315.11454-4-srinivas.kandagatla@linaro.org
drivers/clk/qcom/Kconfig
drivers/clk/qcom/Makefile
drivers/clk/qcom/lpasscc-sc8280xp.c [new file with mode: 0644]

index 97f23f9..5797490 100644 (file)
@@ -550,6 +550,15 @@ config SC_LPASSCC_7280
          Say Y if you want to use the LPASS branch clocks of the LPASS clock
          controller to reset the LPASS subsystem.
 
+config SC_LPASSCC_8280XP
+       tristate "SC8280 Low Power Audio Subsystem (LPASS) Clock Controller"
+       depends on ARM64 || COMPILE_TEST
+       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_LPASS_CORECC_7180
        tristate "SC7180 LPASS Core Clock Controller"
        depends on ARM64 || COMPILE_TEST
index 75d0351..e6e2942 100644 (file)
@@ -81,6 +81,7 @@ obj-$(CONFIG_SC_GPUCC_7180) += gpucc-sc7180.o
 obj-$(CONFIG_SC_GPUCC_7280) += gpucc-sc7280.o
 obj-$(CONFIG_SC_GPUCC_8280XP) += gpucc-sc8280xp.o
 obj-$(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_MSS_7180) += mss-sc7180.o
diff --git a/drivers/clk/qcom/lpasscc-sc8280xp.c b/drivers/clk/qcom/lpasscc-sc8280xp.c
new file mode 100644 (file)
index 0000000..4a0470f
--- /dev/null
@@ -0,0 +1,64 @@
+// 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,sc8280xp-lpasscc.h>
+
+#include "common.h"
+#include "reset.h"
+
+static const struct qcom_reset_map lpasscc_sc8280xp_resets[] = {
+       [LPASS_AUDIO_SWR_TX_CGCR] = { 0xc010, 1 },
+};
+
+static struct regmap_config lpasscc_sc8280xp_regmap_config = {
+       .reg_bits = 32,
+       .reg_stride = 4,
+       .val_bits = 32,
+       .name = "lpass-tcsr",
+       .max_register = 0x12000,
+};
+
+static const struct qcom_cc_desc lpasscc_sc8280xp_reset_desc = {
+       .config = &lpasscc_sc8280xp_regmap_config,
+       .resets = lpasscc_sc8280xp_resets,
+       .num_resets = ARRAY_SIZE(lpasscc_sc8280xp_resets),
+};
+
+static const struct of_device_id lpasscc_sc8280xp_match_table[] = {
+       {
+               .compatible = "qcom,sc8280xp-lpasscc",
+               .data = &lpasscc_sc8280xp_reset_desc,
+       },
+       { }
+};
+MODULE_DEVICE_TABLE(of, lpasscc_sc8280xp_match_table);
+
+static int lpasscc_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 lpasscc_sc8280xp_driver = {
+       .probe = lpasscc_sc8280xp_probe,
+       .driver = {
+               .name = "lpasscc-sc8280xp",
+               .of_match_table = lpasscc_sc8280xp_match_table,
+       },
+};
+
+module_platform_driver(lpasscc_sc8280xp_driver);
+
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
+MODULE_DESCRIPTION("QTI LPASSCC SC8280XP Driver");
+MODULE_LICENSE("GPL");