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clk: qcom: Add lpass clock controller driver for SC8280XP
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
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3 changed files with 74 additions and 0 deletions
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@ -550,6 +550,15 @@ config SC_LPASSCC_7280
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Say Y if you want to use the LPASS branch clocks of the LPASS clock
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controller to reset the LPASS subsystem.
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config SC_LPASSCC_8280XP
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tristate "SC8280 Low Power Audio Subsystem (LPASS) Clock Controller"
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depends on ARM64 || COMPILE_TEST
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select SC_GCC_8280XP
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help
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Support for the LPASS clock controller on SC8280XP devices.
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Say Y if you want to use the LPASS branch clocks of the LPASS clock
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controller to reset the LPASS subsystem.
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config SC_LPASS_CORECC_7180
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tristate "SC7180 LPASS Core Clock Controller"
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depends on ARM64 || COMPILE_TEST
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@ -81,6 +81,7 @@ obj-$(CONFIG_SC_GPUCC_7180) += gpucc-sc7180.o
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obj-$(CONFIG_SC_GPUCC_7280) += gpucc-sc7280.o
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obj-$(CONFIG_SC_GPUCC_8280XP) += gpucc-sc8280xp.o
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obj-$(CONFIG_SC_LPASSCC_7280) += lpasscc-sc7280.o
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obj-$(CONFIG_SC_LPASSCC_8280XP) += lpasscc-sc8280xp.o
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obj-$(CONFIG_SC_LPASS_CORECC_7180) += lpasscorecc-sc7180.o
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obj-$(CONFIG_SC_LPASS_CORECC_7280) += lpasscorecc-sc7280.o lpassaudiocc-sc7280.o
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obj-$(CONFIG_SC_MSS_7180) += mss-sc7180.o
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64
drivers/clk/qcom/lpasscc-sc8280xp.c
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64
drivers/clk/qcom/lpasscc-sc8280xp.c
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@ -0,0 +1,64 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2022, Linaro Limited
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*/
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#include <linux/clk-provider.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <dt-bindings/clock/qcom,sc8280xp-lpasscc.h>
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#include "common.h"
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#include "reset.h"
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static const struct qcom_reset_map lpasscc_sc8280xp_resets[] = {
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[LPASS_AUDIO_SWR_TX_CGCR] = { 0xc010, 1 },
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};
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static struct regmap_config lpasscc_sc8280xp_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 32,
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.name = "lpass-tcsr",
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.max_register = 0x12000,
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};
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static const struct qcom_cc_desc lpasscc_sc8280xp_reset_desc = {
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.config = &lpasscc_sc8280xp_regmap_config,
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.resets = lpasscc_sc8280xp_resets,
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.num_resets = ARRAY_SIZE(lpasscc_sc8280xp_resets),
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};
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static const struct of_device_id lpasscc_sc8280xp_match_table[] = {
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{
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.compatible = "qcom,sc8280xp-lpasscc",
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.data = &lpasscc_sc8280xp_reset_desc,
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},
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{ }
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};
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MODULE_DEVICE_TABLE(of, lpasscc_sc8280xp_match_table);
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static int lpasscc_sc8280xp_probe(struct platform_device *pdev)
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{
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const struct qcom_cc_desc *desc = of_device_get_match_data(&pdev->dev);
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return qcom_cc_probe_by_index(pdev, 0, desc);
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}
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static struct platform_driver lpasscc_sc8280xp_driver = {
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.probe = lpasscc_sc8280xp_probe,
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.driver = {
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.name = "lpasscc-sc8280xp",
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.of_match_table = lpasscc_sc8280xp_match_table,
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},
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};
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module_platform_driver(lpasscc_sc8280xp_driver);
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MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
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MODULE_DESCRIPTION("QTI LPASSCC SC8280XP Driver");
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MODULE_LICENSE("GPL");
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