linux-kernel - [PATCH 2/2] ASoC: AMD: Add an always on fixed 1.8V regulator for da7219 VDDIO

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Date:   Tue, 17 Jul 2018 18:49:09 -0600
From:   Daniel Kurtz <djkurtz@...omium.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Dylan Reid <dgreid@...omium.org>,
        Jimmy Cheng-Yi Chiang <cychiang@...gle.com>,
        Akshu Agrawal <akshu.agrawal@....com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Alex Deucher <alexander.deucher@....com>,
        "Mukunda, Vijendar" <Vijendar.Mukunda@....com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        alsa-devel@...a-project.org (moderated list:SOUND - SOC LAYER / DYNAMIC
        AUDIO POWER MANAGEM...), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] ASoC: AMD: Add an always on fixed 1.8V regulator for da7219 VDDIO

From: Akshu Agrawal <akshu.agrawal@....com>

DA7219's VDDIO for our platform need to be configured for 1.8V.
Hence we register a fixed 1.8V voltage regulator in the machine driver.

Change-Id: I65fd93e1dd37c3e0d38265b4b1492ea53b93afd4
Signed-off-by: Akshu Agrawal <akshu.agrawal@....com>
Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
---
 sound/soc/amd/Kconfig                |  1 +
 sound/soc/amd/acp-da7219-max98357a.c | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
index 6cbf9cf4d1a4c2..58c1dcb4d2550f 100644
--- a/sound/soc/amd/Kconfig
+++ b/sound/soc/amd/Kconfig
@@ -8,6 +8,7 @@ config SND_SOC_AMD_CZ_DA7219MX98357_MACH
 	select SND_SOC_DA7219
 	select SND_SOC_MAX98357A
 	select SND_SOC_ADAU7002
+	select REGULATOR
 	depends on SND_SOC_AMD_ACP && I2C
 	help
 	 This option enables machine driver for DA7219 and MAX9835.
diff --git a/sound/soc/amd/acp-da7219-max98357a.c b/sound/soc/amd/acp-da7219-max98357a.c
index ccddc6650b9c79..6ea0f42f5b7692 100644
--- a/sound/soc/amd/acp-da7219-max98357a.c
+++ b/sound/soc/amd/acp-da7219-max98357a.c
@@ -32,6 +32,8 @@
 #include <linux/clk.h>
 #include <linux/gpio.h>
 #include <linux/module.h>
+#include <linux/regulator/fixed.h>
+#include <linux/regulator/machine.h>
 #include <linux/i2c.h>
 #include <linux/input.h>
 #include <linux/acpi.h>
@@ -278,11 +280,23 @@ static struct snd_soc_card cz_card = {
 	.num_controls = ARRAY_SIZE(cz_mc_controls),
 };
 
+static struct regulator_consumer_supply acp_da7219_supplies[] = {
+	REGULATOR_SUPPLY("VDDIO", "i2c-DLGS7219:00")
+};
+
 static int cz_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct snd_soc_card *card;
 	struct acp_platform_info *machine;
+	struct platform_device *reg;
+
+	reg = regulator_register_always_on(0, "fixed-1.8V",
+					   acp_da7219_supplies,
+					   ARRAY_SIZE(acp_da7219_supplies),
+					   1800000);
+	if (!reg)
+		return -ENOMEM;
 
 	machine = devm_kzalloc(&pdev->dev, sizeof(struct acp_platform_info),
 			       GFP_KERNEL);
-- 
2.18.0.203.gfac676dfb9-goog