linux-kernel - [PATCH v4 08/12] ASoC: cs35l56: Make common function for control port wait

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Message-ID: <20230601154731.3210572-9-rf@opensource.cirrus.com>
Date:   Thu, 1 Jun 2023 16:47:27 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <tiwai@...e.com>, <perex@...ex.cz>, <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Simon Trimmer <simont@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH v4 08/12] ASoC: cs35l56: Make common function for control port wait

From: Simon Trimmer <simont@...nsource.cirrus.com>

Move the waits for CS35L56_CONTROL_PORT_READY_US into a common
function, and also allow a wider range of allowed wait times.

Signed-off-by: Simon Trimmer <simont@...nsource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
Acked-by: Mark Brown <broonie@...nel.org>
---
 include/sound/cs35l56.h           |  1 +
 sound/soc/codecs/cs35l56-shared.c | 16 ++++++++++------
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h
index 489a61f84325..ae9e8f55962a 100644
--- a/include/sound/cs35l56.h
+++ b/include/sound/cs35l56.h
@@ -275,6 +275,7 @@ extern const unsigned int cs35l56_tx_input_values[CS35L56_NUM_INPUT_SRC];
 void cs35l56_reread_firmware_registers(struct cs35l56_base *cs35l56_base);
 int cs35l56_mbox_send(struct cs35l56_base *cs35l56_base, unsigned int command);
 int cs35l56_wait_for_firmware_boot(struct cs35l56_base *cs35l56_base);
+void cs35l56_wait_control_port_ready(void);
 void cs35l56_wait_min_reset_pulse(void);
 void cs35l56_system_reset(struct cs35l56_base *cs35l56_base, bool is_soundwire);
 int cs35l56_irq_request(struct cs35l56_base *cs35l56_base, int irq);
diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c
index e3b935bd9037..7e02d023338c 100644
--- a/sound/soc/codecs/cs35l56-shared.c
+++ b/sound/soc/codecs/cs35l56-shared.c
@@ -249,6 +249,13 @@ int cs35l56_wait_for_firmware_boot(struct cs35l56_base *cs35l56_base)
 }
 EXPORT_SYMBOL_NS_GPL(cs35l56_wait_for_firmware_boot, SND_SOC_CS35L56_SHARED);
 
+void cs35l56_wait_control_port_ready(void)
+{
+	/* Wait for control port to be ready (datasheet tIRS). */
+	usleep_range(CS35L56_CONTROL_PORT_READY_US, 2 * CS35L56_CONTROL_PORT_READY_US);
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_wait_control_port_ready, SND_SOC_CS35L56_SHARED);
+
 void cs35l56_wait_min_reset_pulse(void)
 {
 	/* Satisfy minimum reset pulse width spec */
@@ -275,7 +282,7 @@ void cs35l56_system_reset(struct cs35l56_base *cs35l56_base, bool is_soundwire)
 	if (is_soundwire)
 		return;
 
-	usleep_range(CS35L56_CONTROL_PORT_READY_US, CS35L56_CONTROL_PORT_READY_US + 400);
+	cs35l56_wait_control_port_ready();
 	regcache_cache_only(cs35l56_base->regmap, false);
 }
 EXPORT_SYMBOL_NS_GPL(cs35l56_system_reset, SND_SOC_CS35L56_SHARED);
@@ -486,8 +493,7 @@ int cs35l56_runtime_resume_common(struct cs35l56_base *cs35l56_base, bool is_sou
 						cs35l56_hibernate_wake_seq,
 						ARRAY_SIZE(cs35l56_hibernate_wake_seq));
 
-		usleep_range(CS35L56_CONTROL_PORT_READY_US,
-			     CS35L56_CONTROL_PORT_READY_US + 400);
+		cs35l56_wait_control_port_ready();
 	}
 
 out_sync:
@@ -561,9 +567,7 @@ int cs35l56_hw_init(struct cs35l56_base *cs35l56_base)
 	if (!cs35l56_base->reset_gpio)
 		regmap_read(cs35l56_base->regmap, CS35L56_DSP_VIRTUAL1_MBOX_1, &devid);
 
-	/* Wait for control port to be ready (datasheet tIRS). */
-	usleep_range(CS35L56_CONTROL_PORT_READY_US,
-		     CS35L56_CONTROL_PORT_READY_US + 400);
+	cs35l56_wait_control_port_ready();
 
 	/*
 	 * The HALO_STATE register is in different locations on Ax and B0
-- 
2.30.2