linux-kernel - [PATCH v2 2/7] ASoC: mediatek: mt7986: support audio clock control

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Date:   Mon, 26 Jun 2023 10:34:56 +0800
From:   Maso Huang <maso.huang@...iatek.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Trevor Wu <trevor.wu@...iatek.com>,
        Jiaxin Yu <jiaxin.yu@...iatek.com>,
        Ren Zhijie <renzhijie2@...wei.com>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
CC:     Maso Huang <maso.huang@...iatek.com>
Subject: [PATCH v2 2/7] ASoC: mediatek: mt7986: support audio clock control

Add audio clock wrapper and audio tuner control.

Signed-off-by: Maso Huang <maso.huang@...iatek.com>
---
 sound/soc/mediatek/mt7986/mt7986-afe-clk.c | 75 ++++++++++++++++++++++
 sound/soc/mediatek/mt7986/mt7986-afe-clk.h | 18 ++++++
 2 files changed, 93 insertions(+)
 create mode 100644 sound/soc/mediatek/mt7986/mt7986-afe-clk.c
 create mode 100644 sound/soc/mediatek/mt7986/mt7986-afe-clk.h

diff --git a/sound/soc/mediatek/mt7986/mt7986-afe-clk.c b/sound/soc/mediatek/mt7986/mt7986-afe-clk.c
new file mode 100644
index 000000000000..a8b5fae05673
--- /dev/null
+++ b/sound/soc/mediatek/mt7986/mt7986-afe-clk.c
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mt7986-afe-clk.c  --  MediaTek 7986 afe clock ctrl
+ *
+ * Copyright (c) 2021 MediaTek Inc.
+ * Author: Vic Wu <vic.wu@...iatek.com>
+ *         Maso Huang <maso.huang@...iatek.com>
+ */
+
+#include <linux/clk.h>
+
+#include "mt7986-afe-common.h"
+#include "mt7986-afe-clk.h"
+#include "mt7986-reg.h"
+
+enum {
+	CK_INFRA_AUD_BUS_CK = 0,
+	CK_INFRA_AUD_26M_CK,
+	CK_INFRA_AUD_L_CK,
+	CK_INFRA_AUD_AUD_CK,
+	CK_INFRA_AUD_EG2_CK,
+	CLK_NUM
+};
+
+static const char *aud_clks[CLK_NUM] = {
+	[CK_INFRA_AUD_BUS_CK] = "aud_bus_ck",
+	[CK_INFRA_AUD_26M_CK] = "aud_26m_ck",
+	[CK_INFRA_AUD_L_CK] = "aud_l_ck",
+	[CK_INFRA_AUD_AUD_CK] = "aud_aud_ck",
+	[CK_INFRA_AUD_EG2_CK] = "aud_eg2_ck",
+};
+
+int mt7986_init_clock(struct mtk_base_afe *afe)
+{
+	struct mt7986_afe_private *afe_priv = afe->platform_priv;
+	int ret, i;
+
+	afe_priv->clks = devm_kcalloc(afe->dev, CLK_NUM,
+				sizeof(*afe_priv->clks), GFP_KERNEL);
+	if (!afe_priv->clks)
+		return -ENOMEM;
+	afe_priv->num_clks = CLK_NUM;
+
+	for (i = 0; i < afe_priv->num_clks; i++)
+		afe_priv->clks[i].id = aud_clks[i];
+
+	ret = devm_clk_bulk_get(afe->dev, afe_priv->num_clks, afe_priv->clks);
+	if (ret)
+		return dev_err_probe(afe->dev, ret, "Failed to get clocks\n");
+
+	return 0;
+}
+
+int mt7986_afe_enable_clock(struct mtk_base_afe *afe)
+{
+	struct mt7986_afe_private *afe_priv = afe->platform_priv;
+	int ret;
+
+	ret = clk_bulk_prepare_enable(afe_priv->num_clks, afe_priv->clks);
+	if (ret)
+		return dev_err_probe(afe->dev, ret, "Failed to enable clocks\n");
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt7986_afe_enable_clock);
+
+int mt7986_afe_disable_clock(struct mtk_base_afe *afe)
+{
+	struct mt7986_afe_private *afe_priv = afe->platform_priv;
+
+	clk_bulk_disable_unprepare(afe_priv->num_clks, afe_priv->clks);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt7986_afe_disable_clock);
diff --git a/sound/soc/mediatek/mt7986/mt7986-afe-clk.h b/sound/soc/mediatek/mt7986/mt7986-afe-clk.h
new file mode 100644
index 000000000000..2f15b7a54bdc
--- /dev/null
+++ b/sound/soc/mediatek/mt7986/mt7986-afe-clk.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * mt7986-afe-clk.h  --  MediaTek 7986 afe clock ctrl definition
+ *
+ * Copyright (c) 2021 MediaTek Inc.
+ * Author: Vic Wu <vic.wu@...iatek.com>
+ *         Maso Huang <maso.huang@...iatek.com>
+ */
+
+#ifndef _MT7986_AFE_CLK_H_
+#define _MT7986_AFE_CLK_H_
+
+struct mtk_base_afe;
+
+int mt7986_init_clock(struct mtk_base_afe *afe);
+int mt7986_afe_enable_clock(struct mtk_base_afe *afe);
+int mt7986_afe_disable_clock(struct mtk_base_afe *afe);
+#endif
-- 
2.18.0