From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EC0D63370EA; Thu, 16 Jul 2026 19:51:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784231496; cv=none; b=r8YB8f0HOql/53yt/clup/PLCYVx13ef4NfpLSft4eLS5CtkaT91qD3imou+9MQLr9D7KAmem7DUlAklogLU6cMI0iWrI0V50pUJy/6YBdjh9bTA+JBBPcTWWCvnwokqB5bkrxed/JPzUIvsMmJ5zMFOnK9OZ9uR/i0DHFcOf3Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784231496; c=relaxed/simple; bh=gjht4B6kLEaSd7U1uuU+Wtdxus3TUfO7jcOzDwO2h0o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=XCn91xU0v7z6j/W017Ky30XH8Ll36mpSXxmcm8wKdwr3sTkTe5z60v3Kw+OWeSDdp0Rg3R6H+3R67cjHDQ2ftGeHHOlhkVe/xpA++hD5xaLW85E8uD9+8+i2Ua0+3025pxe9vH+gDaTKxwqj3hcBdfUn7/RcCxmpMRcQ8Eug6wU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FKdEMa+W; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FKdEMa+W" Received: by smtp.kernel.org (Postfix) with ESMTPS id B0598C2BCF7; Thu, 16 Jul 2026 19:51:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1784231495; bh=gjht4B6kLEaSd7U1uuU+Wtdxus3TUfO7jcOzDwO2h0o=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=FKdEMa+Wdpxm5HKNMTxCEVLS8cZKWq8z7Zx0ptyiYZNM+v8VNVSIxdEGT7W8kL3a6 FZ27risvVxKAiHGl2cNT6m5M9OYhtywQTotBkeEzdj9T6k2BBuh6lQ72dcSwkiOKlz 7pcOR9dYxHc7G2VMiBkMpcqMPpdoVx93s65uFyHtOcibYjSv5A92LRSyUhQE4r7J+f zd65dJez0aShproF8kX92JX2c65uWEPjoARaslF7Ps2DPbNqlmmOzcejB/qOQxSE3Q aTTTFYveDicu1wxFGYzwbfSsUUT/GcseosKp1cdzJyT7aGWingWGYDmwhhXulo+oxP t/gzLUhSTIyFw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99D6CC44519; Thu, 16 Jul 2026 19:51:35 +0000 (UTC) From: Sarath Ganapathiraju via B4 Relay Date: Fri, 17 Jul 2026 01:21:17 +0530 Subject: [PATCH v2 3/3] ASoC: Add LPASS VA CSR heartbeat pulse clock Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260717-master-v2-3-ae200627ad62@oss.qualcomm.com> References: <20260717-master-v2-0-ae200627ad62@oss.qualcomm.com> In-Reply-To: <20260717-master-v2-0-ae200627ad62@oss.qualcomm.com> To: Srinivas Kandagatla , Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jaroslav Kysela , Takashi Iwai Cc: Srinivas Kandagatla , linux-sound@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, prasad.kumpatla@oss.qualcomm.com, Konrad Dybcio , Sarath Ganapathiraju X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784231493; l=6974; i=sarath.ganapathiraju@oss.qualcomm.com; s=default; h=from:subject:message-id; bh=DnVdQ9J5AHrIxPxYmGG+p8yZwISdgbHZpP4wxV2R65s=; b=O8dR1PjzSazMAT0yzdBZMtGqWPmkFN23wULOAFjlW9iwNWpy5YcfxbE7CANzKT24B/EQrY5MY BtKR3m4QSlBDMy9WgrK9Xg11SVUPp7uboRSikm5ylKbnTokt6i4KVVc X-Developer-Key: i=sarath.ganapathiraju@oss.qualcomm.com; a=ed25519; pk=4p2FWGXM+F2sir13Lu5stw5aKX5trUymK/ttESvgxQg= X-Endpoint-Received: by B4 Relay for sarath.ganapathiraju@oss.qualcomm.com/default with auth_id=870 X-Original-From: Sarath Ganapathiraju Reply-To: sarath.ganapathiraju@oss.qualcomm.com From: Sarath Ganapathiraju The HeartBeat Pulse (also known as RateGen Pulse) synchronizes the start of the DMAs and Codec Interfaces for the audio usecases and can serve as a periodic wakeup source for the DSP. Add the LPASS VA CSR driver that models the rate generator as a clock provider so it is enabled and disabled automatically alongside the other clocks during runtime PM resume and suspend. Signed-off-by: Sarath Ganapathiraju --- sound/soc/codecs/Kconfig | 13 ++++ sound/soc/codecs/Makefile | 2 + sound/soc/codecs/lpass-va-csr.c | 143 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 158 insertions(+) diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 76e90144ea..5dbfa77d0e 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -2902,11 +2902,24 @@ config SND_SOC_LPASS_WSA_MACRO select SND_SOC_LPASS_MACRO_COMMON tristate "Qualcomm WSA Macro in LPASS(Low Power Audio SubSystem)" +config SND_SOC_LPASS_VA_CSR + depends on COMMON_CLK + select REGMAP_MMIO + tristate "Qualcomm LPASS VA CSR heartbeat pulse clock provider" + help + Qualcomm LPASS VA CSR block contains the rate generator hardware + that produces the HeartBeat Pulse (also known as RateGen Pulse). + This driver models the rate generator as a clock provider so + that consumers can enable or disable it via the common clock + framework, and it can be used to synchronize the start of DMAs + and Codec Interfaces or as a periodic wakeup source for the DSP. + config SND_SOC_LPASS_VA_MACRO depends on COMMON_CLK depends on PM_CLK select REGMAP_MMIO select SND_SOC_LPASS_MACRO_COMMON + select SND_SOC_LPASS_VA_CSR tristate "Qualcomm VA Macro in LPASS(Low Power Audio SubSystem)" config SND_SOC_LPASS_RX_MACRO diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index aa0396e5b5..3e86c1bbf9 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -163,6 +163,7 @@ snd-soc-lpass-rx-macro-y := lpass-rx-macro.o snd-soc-lpass-tx-macro-y := lpass-tx-macro.o snd-soc-lpass-wsa-macro-y := lpass-wsa-macro.o snd-soc-lpass-va-macro-y := lpass-va-macro.o +snd-soc-lpass-va-csr-y := lpass-va-csr.o snd-soc-madera-y := madera.o snd-soc-max9759-y := max9759.o snd-soc-max9768-y := max9768.o @@ -886,6 +887,7 @@ obj-$(CONFIG_SND_SOC_TPA6130A2) += snd-soc-tpa6130a2.o obj-$(CONFIG_SND_SOC_LPASS_MACRO_COMMON) += snd-soc-lpass-macro-common.o obj-$(CONFIG_SND_SOC_LPASS_WSA_MACRO) += snd-soc-lpass-wsa-macro.o obj-$(CONFIG_SND_SOC_LPASS_VA_MACRO) += snd-soc-lpass-va-macro.o +obj-$(CONFIG_SND_SOC_LPASS_VA_CSR) += snd-soc-lpass-va-csr.o obj-$(CONFIG_SND_SOC_LPASS_RX_MACRO) += snd-soc-lpass-rx-macro.o obj-$(CONFIG_SND_SOC_LPASS_TX_MACRO) += snd-soc-lpass-tx-macro.o diff --git a/sound/soc/codecs/lpass-va-csr.c b/sound/soc/codecs/lpass-va-csr.c new file mode 100644 index 0000000000..1d0805789e --- /dev/null +++ b/sound/soc/codecs/lpass-va-csr.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + */ + +#include +#include +#include +#include +#include +#include + +#define LPASS_RATE_GEN_CTRL 0xd000 +#define LPASS_RATE_GEN_COUNTER_0 0xd004 +#define LPASS_RATE_GEN_DELAY 0xd010 + +#define LPASS_RATE_GEN_MAX_REG LPASS_RATE_GEN_DELAY + +#define LPASS_RG_CTRL_EN BIT(0) + +struct lpass_va_csr_data { + u32 counter_0; + u32 delay; +}; + +static const struct lpass_va_csr_data hawi_csr_data = { + .counter_0 = 0x960, + .delay = 0x16, +}; + +static const struct regmap_config lpass_rate_gen_regmap_config = { + .name = "lpass_rate_gen", + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = LPASS_RATE_GEN_MAX_REG, + .cache_type = REGCACHE_MAPLE, +}; + +struct lpass_va_csr { + struct regmap *regmap; + const struct lpass_va_csr_data *data; + struct clk_hw hb_hw; +}; + +#define to_lpass_va_csr(_hw) container_of(_hw, struct lpass_va_csr, hb_hw) + +static int heartbeat_pulse_prepare(struct clk_hw *hw) +{ + struct lpass_va_csr *csr = to_lpass_va_csr(hw); + int ret; + + ret = regmap_write(csr->regmap, LPASS_RATE_GEN_COUNTER_0, csr->data->counter_0); + if (ret) + return ret; + + ret = regmap_write(csr->regmap, LPASS_RATE_GEN_DELAY, csr->data->delay); + if (ret) + return ret; + + return regmap_set_bits(csr->regmap, LPASS_RATE_GEN_CTRL, LPASS_RG_CTRL_EN); +} + +static void heartbeat_pulse_unprepare(struct clk_hw *hw) +{ + struct lpass_va_csr *csr = to_lpass_va_csr(hw); + + regmap_clear_bits(csr->regmap, LPASS_RATE_GEN_CTRL, LPASS_RG_CTRL_EN); +} + +static int heartbeat_pulse_is_prepared(struct clk_hw *hw) +{ + struct lpass_va_csr *csr = to_lpass_va_csr(hw); + + return regmap_test_bits(csr->regmap, LPASS_RATE_GEN_CTRL, LPASS_RG_CTRL_EN); +} + +static const struct clk_ops heartbeat_pulse_ops = { + .prepare = heartbeat_pulse_prepare, + .unprepare = heartbeat_pulse_unprepare, + .is_prepared = heartbeat_pulse_is_prepared, +}; + +static int lpass_va_csr_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct lpass_va_csr *csr; + struct clk_init_data init = { + .name = "lpass_heartbeat_pulse", + .ops = &heartbeat_pulse_ops, + }; + void __iomem *base; + int ret; + + csr = devm_kzalloc(dev, sizeof(*csr), GFP_KERNEL); + if (!csr) + return -ENOMEM; + + csr->data = of_device_get_match_data(dev); + if (!csr->data) + return dev_err_probe(dev, -EINVAL, "no variant data for compatible\n"); + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + csr->regmap = devm_regmap_init_mmio(dev, base, + &lpass_rate_gen_regmap_config); + if (IS_ERR(csr->regmap)) + return dev_err_probe(dev, PTR_ERR(csr->regmap), + "failed to init regmap\n"); + + csr->hb_hw.init = &init; + + ret = devm_clk_hw_register(dev, &csr->hb_hw); + if (ret) + return dev_err_probe(dev, ret, "failed to register heartbeat clock\n"); + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &csr->hb_hw); + if (ret) + return dev_err_probe(dev, ret, "failed to add clock provider\n"); + + return 0; +} + +static const struct of_device_id lpass_va_csr_dt_match[] = { + { .compatible = "qcom,hawi-lpass-va-csr", .data = &hawi_csr_data }, + {} +}; +MODULE_DEVICE_TABLE(of, lpass_va_csr_dt_match); + +static struct platform_driver lpass_va_csr_driver = { + .driver = { + .name = "qcom-lpass-va-csr", + .of_match_table = lpass_va_csr_dt_match, + }, + .probe = lpass_va_csr_probe, +}; + +module_platform_driver(lpass_va_csr_driver); + +MODULE_DESCRIPTION("Qualcomm LPASS VA CSR heartbeat pulse clock provider"); +MODULE_LICENSE("GPL"); -- 2.34.1