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Subject[PATCH] ASoC: AMD: Add a fix voltage regulator for DA7219 and ADAU7002
Date
DA7219 for our platform need to be configured for 1.8V.
Hence, we add a fixed volatge regulator with supplies
of 1.8V in the machine driver.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
sound/soc/amd/Kconfig | 2 ++
sound/soc/amd/acp-da7219-max98357a.c | 45 ++++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)

diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
index 6cbf9cf..c447a51 100644
--- a/sound/soc/amd/Kconfig
+++ b/sound/soc/amd/Kconfig
@@ -8,6 +8,8 @@ config SND_SOC_AMD_CZ_DA7219MX98357_MACH
select SND_SOC_DA7219
select SND_SOC_MAX98357A
select SND_SOC_ADAU7002
+ select REGULATOR
+ select REGULATOR_FIXED_VOLTAGE
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 f42606e..fdf8972 100644
--- a/sound/soc/amd/acp-da7219-max98357a.c
+++ b/sound/soc/amd/acp-da7219-max98357a.c
@@ -31,7 +31,10 @@
#include <sound/jack.h>
#include <linux/clk.h>
#include <linux/gpio.h>
+#include <linux/platform_device.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>
@@ -320,11 +323,53 @@ static void cz_dmic_shutdown(struct snd_pcm_substream *substream)
.num_controls = ARRAY_SIZE(cz_mc_controls),
};

+static struct regulator_consumer_supply acp_da7219_supplies[] = {
+ REGULATOR_SUPPLY("VDD", "i2c-DLGS7219:00"),
+ REGULATOR_SUPPLY("VDDMIC", "i2c-DLGS7219:00"),
+ REGULATOR_SUPPLY("VDDIO", "i2c-DLGS7219:00"),
+ REGULATOR_SUPPLY("IOVDD", "ADAU7002:00"),
+};
+
+static struct regulator_init_data acp_da7219_data = {
+ .constraints = {
+ .always_on = 1,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(acp_da7219_supplies),
+ .consumer_supplies = acp_da7219_supplies,
+};
+
+static struct fixed_voltage_config acp_da7219 = {
+ .supply_name = "reg-fixed-1.8V",
+ .microvolts = 1800000, /* 1.8V */
+ .gpio = -EINVAL,
+ .enabled_at_boot = 1,
+ .init_data = &acp_da7219_data,
+};
+
+static struct platform_device acp_da7219_regulator = {
+ .name = "reg-fixed-voltage",
+ .id = PLATFORM_DEVID_AUTO,
+ .dev = {
+ .platform_data = &acp_da7219,
+ },
+};
+
static int cz_probe(struct platform_device *pdev)
{
int ret;
struct snd_soc_card *card;
struct acp_platform_info *machine;
+ static bool regulators_registered;
+
+ if (!regulators_registered) {
+ ret = platform_device_register(&acp_da7219_regulator);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register regulator: %d\n",
+ ret);
+ return ret;
+ }
+ regulators_registered = true;
+ }

machine = devm_kzalloc(&pdev->dev, sizeof(struct acp_platform_info),
GFP_KERNEL);
--
1.9.1
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