Re: [PATCH v2 03/12] ASoC: mediatek: mt8188: support audsys clock

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Il 21/10/22 10:27, Trevor Wu ha scritto:
Add mt8188 audio cg clock control. Audio clock gates are registered to CCF
for reference count and clock parent management.

Signed-off-by: Trevor Wu <trevor.wu@xxxxxxxxxxxx>
---
  sound/soc/mediatek/mt8188/mt8188-audsys-clk.c | 206 ++++++++++++++++++
  sound/soc/mediatek/mt8188/mt8188-audsys-clk.h |  15 ++
  .../soc/mediatek/mt8188/mt8188-audsys-clkid.h |  83 +++++++
  3 files changed, 304 insertions(+)
  create mode 100644 sound/soc/mediatek/mt8188/mt8188-audsys-clk.c
  create mode 100644 sound/soc/mediatek/mt8188/mt8188-audsys-clk.h
  create mode 100644 sound/soc/mediatek/mt8188/mt8188-audsys-clkid.h

diff --git a/sound/soc/mediatek/mt8188/mt8188-audsys-clk.c b/sound/soc/mediatek/mt8188/mt8188-audsys-clk.c
new file mode 100644
index 000000000000..1f294231d4c2
--- /dev/null
+++ b/sound/soc/mediatek/mt8188/mt8188-audsys-clk.c
@@ -0,0 +1,206 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mt8188-audsys-clk.c  --  MediaTek 8188 audsys clock control
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Chun-Chia Chiu <chun-chia.chiu@xxxxxxxxxxxx>
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include "mt8188-afe-common.h"
+#include "mt8188-audsys-clk.h"
+#include "mt8188-audsys-clkid.h"
+#include "mt8188-reg.h"
+
+struct afe_gate {
+	int id;
+	const char *name;
+	const char *parent_name;
+	int reg;
+	u8 bit;
+	const struct clk_ops *ops;
+	unsigned long flags;
+	u8 cg_flags;
+};
+
+#define GATE_AFE_FLAGS(_id, _name, _parent, _reg, _bit, _flags, _cgflags) {\
+		.id = _id,					\
+		.name = _name,					\
+		.parent_name = _parent,				\
+		.reg = _reg,					\
+		.bit = _bit,					\
+		.flags = _flags,				\
+		.cg_flags = _cgflags,				\
+	}
+
+#define GATE_AFE(_id, _name, _parent, _reg, _bit)		\
+	GATE_AFE_FLAGS(_id, _name, _parent, _reg, _bit,		\
+		       CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, CLK_GATE_SET_TO_DISABLE)

Can you please explain what's the reason for CLK_IGNORE_UNUSED here?
Maybe we can solve some issue that you're facing in a cleaner way.

Regards,
Angelo




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