+++ /dev/null
-From 77dce745cd500cbe65e4cbb613c27c23e26f5bbb Mon Sep 17 00:00:00 2001
-From: BabuSubashChandar <babuenir@gmail.com>
-Date: Tue, 28 Mar 2017 20:04:42 +0530
-Subject: [PATCH] Add support for Allo Boss DAC add-on board for
- Raspberry Pi. (#1924)
-
-Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
-Reviewed-by: Deepak <deepak@zilogic.com>
-Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com>
-
-Add support for new clock rate and mute gpios.
-
-Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
-Reviewed-by: Deepak <deepak@zilogic.com>
-Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com>
-
-ASoC: allo-boss-dac: fix S24_LE format
-
-Remove set_bclk_ratio call so 24-bit data is transmitted in
-24 bclk cycles.
-
-Signed-off-by: Matthias Reichl <hias@horus.com>
-
-ASoC: allo-boss-dac: transmit S24_LE with 64 BCLK cycles
-
-Signed-off-by: Matthias Reichl <hias@horus.com>
----
- drivers/clk/Makefile | 1 +
- drivers/clk/clk-allo-dac.c | 161 ++++++++++++
- sound/soc/bcm/allo-boss-dac.c | 456 ++++++++++++++++++++++++++++++++++
- 3 files changed, 618 insertions(+)
- create mode 100644 drivers/clk/clk-allo-dac.c
- create mode 100644 sound/soc/bcm/allo-boss-dac.c
-
---- a/drivers/clk/Makefile
-+++ b/drivers/clk/Makefile
-@@ -18,6 +18,7 @@ endif
-
- # hardware specific clock types
- # please keep this section sorted lexicographically by file path name
-+obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += clk-allo-dac.o
- obj-$(CONFIG_MACH_ASM9260) += clk-asm9260.o
- obj-$(CONFIG_COMMON_CLK_AXI_CLKGEN) += clk-axi-clkgen.o
- obj-$(CONFIG_ARCH_AXXIA) += clk-axm5516.o
---- /dev/null
-+++ b/drivers/clk/clk-allo-dac.c
-@@ -0,0 +1,161 @@
-+/*
-+ * Clock Driver for Allo DAC
-+ *
-+ * Author: Baswaraj K <jaikumar@cem-solutions.net>
-+ * Copyright 2016
-+ * based on code by Stuart MacLean
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * version 2 as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful, but
-+ * WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-+ * General Public License for more details.
-+ */
-+
-+#include <linux/clk-provider.h>
-+#include <linux/clkdev.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/slab.h>
-+#include <linux/platform_device.h>
-+
-+/* Clock rate of CLK44EN attached to GPIO6 pin */
-+#define CLK_44EN_RATE 45158400UL
-+/* Clock rate of CLK48EN attached to GPIO3 pin */
-+#define CLK_48EN_RATE 49152000UL
-+
-+/**
-+ * struct allo_dac_clk - Common struct to the Allo DAC
-+ * @hw: clk_hw for the common clk framework
-+ * @mode: 0 => CLK44EN, 1 => CLK48EN
-+ */
-+struct clk_allo_hw {
-+ struct clk_hw hw;
-+ uint8_t mode;
-+};
-+
-+#define to_allo_clk(_hw) container_of(_hw, struct clk_allo_hw, hw)
-+
-+static const struct of_device_id clk_allo_dac_dt_ids[] = {
-+ { .compatible = "allo,dac-clk",},
-+ { }
-+};
-+MODULE_DEVICE_TABLE(of, clk_allo_dac_dt_ids);
-+
-+static unsigned long clk_allo_dac_recalc_rate(struct clk_hw *hw,
-+ unsigned long parent_rate)
-+{
-+ return (to_allo_clk(hw)->mode == 0) ? CLK_44EN_RATE :
-+ CLK_48EN_RATE;
-+}
-+
-+static long clk_allo_dac_round_rate(struct clk_hw *hw,
-+ unsigned long rate, unsigned long *parent_rate)
-+{
-+ long actual_rate;
-+
-+ if (rate <= CLK_44EN_RATE) {
-+ actual_rate = (long)CLK_44EN_RATE;
-+ } else if (rate >= CLK_48EN_RATE) {
-+ actual_rate = (long)CLK_48EN_RATE;
-+ } else {
-+ long diff44Rate = (long)(rate - CLK_44EN_RATE);
-+ long diff48Rate = (long)(CLK_48EN_RATE - rate);
-+
-+ if (diff44Rate < diff48Rate)
-+ actual_rate = (long)CLK_44EN_RATE;
-+ else
-+ actual_rate = (long)CLK_48EN_RATE;
-+ }
-+ return actual_rate;
-+}
-+
-+
-+static int clk_allo_dac_set_rate(struct clk_hw *hw,
-+ unsigned long rate, unsigned long parent_rate)
-+{
-+ unsigned long actual_rate;
-+ struct clk_allo_hw *clk = to_allo_clk(hw);
-+
-+ actual_rate = (unsigned long)clk_allo_dac_round_rate(hw, rate,
-+ &parent_rate);
-+ clk->mode = (actual_rate == CLK_44EN_RATE) ? 0 : 1;
-+ return 0;
-+}
-+
-+
-+const struct clk_ops clk_allo_dac_rate_ops = {
-+ .recalc_rate = clk_allo_dac_recalc_rate,
-+ .round_rate = clk_allo_dac_round_rate,
-+ .set_rate = clk_allo_dac_set_rate,
-+};
-+
-+static int clk_allo_dac_probe(struct platform_device *pdev)
-+{
-+ int ret;
-+ struct clk_allo_hw *proclk;
-+ struct clk *clk;
-+ struct device *dev;
-+ struct clk_init_data init;
-+
-+ dev = &pdev->dev;
-+
-+ proclk = kzalloc(sizeof(struct clk_allo_hw), GFP_KERNEL);
-+ if (!proclk)
-+ return -ENOMEM;
-+
-+ init.name = "clk-allo-dac";
-+ init.ops = &clk_allo_dac_rate_ops;
-+ init.flags = CLK_IS_BASIC;
-+ init.parent_names = NULL;
-+ init.num_parents = 0;
-+
-+ proclk->mode = 0;
-+ proclk->hw.init = &init;
-+
-+ clk = devm_clk_register(dev, &proclk->hw);
-+ if (!IS_ERR(clk)) {
-+ ret = of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
-+ clk);
-+ } else {
-+ dev_err(dev, "Fail to register clock driver\n");
-+ kfree(proclk);
-+ ret = PTR_ERR(clk);
-+ }
-+ return ret;
-+}
-+
-+static int clk_allo_dac_remove(struct platform_device *pdev)
-+{
-+ of_clk_del_provider(pdev->dev.of_node);
-+ return 0;
-+}
-+
-+static struct platform_driver clk_allo_dac_driver = {
-+ .probe = clk_allo_dac_probe,
-+ .remove = clk_allo_dac_remove,
-+ .driver = {
-+ .name = "clk-allo-dac",
-+ .of_match_table = clk_allo_dac_dt_ids,
-+ },
-+};
-+
-+static int __init clk_allo_dac_init(void)
-+{
-+ return platform_driver_register(&clk_allo_dac_driver);
-+}
-+core_initcall(clk_allo_dac_init);
-+
-+static void __exit clk_allo_dac_exit(void)
-+{
-+ platform_driver_unregister(&clk_allo_dac_driver);
-+}
-+module_exit(clk_allo_dac_exit);
-+
-+MODULE_DESCRIPTION("Allo DAC clock driver");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS("platform:clk-allo-dac");
---- /dev/null
-+++ b/sound/soc/bcm/allo-boss-dac.c
-@@ -0,0 +1,456 @@
-+/*
-+ * ALSA ASoC Machine Driver for Allo Boss DAC
-+ *
-+ * Author: Baswaraj K <jaikumar@cem-solutions.net>
-+ * Copyright 2017
-+ * based on code by Daniel Matuschek,
-+ * Stuart MacLean <stuart@hifiberry.com>
-+ * based on code by Florian Meier <florian.meier@koalo.de>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * version 2 as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful, but
-+ * WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-+ * General Public License for more details.
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/gpio/consumer.h>
-+#include <linux/platform_device.h>
-+#include <linux/clk.h>
-+#include <linux/delay.h>
-+
-+#include <sound/core.h>
-+#include <sound/pcm.h>
-+#include <sound/pcm_params.h>
-+#include <sound/soc.h>
-+#include "../codecs/pcm512x.h"
-+
-+#define ALLO_BOSS_NOCLOCK 0
-+#define ALLO_BOSS_CLK44EN 1
-+#define ALLO_BOSS_CLK48EN 2
-+
-+struct pcm512x_priv {
-+ struct regmap *regmap;
-+ struct clk *sclk;
-+};
-+
-+static struct gpio_desc *mute_gpio;
-+
-+/* Clock rate of CLK44EN attached to GPIO6 pin */
-+#define CLK_44EN_RATE 45158400UL
-+/* Clock rate of CLK48EN attached to GPIO3 pin */
-+#define CLK_48EN_RATE 49152000UL
-+
-+static bool slave;
-+static bool snd_soc_allo_boss_master;
-+static bool digital_gain_0db_limit = true;
-+
-+static void snd_allo_boss_select_clk(struct snd_soc_component *component,
-+ int clk_id)
-+{
-+ switch (clk_id) {
-+ case ALLO_BOSS_NOCLOCK:
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x00);
-+ break;
-+ case ALLO_BOSS_CLK44EN:
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x20);
-+ break;
-+ case ALLO_BOSS_CLK48EN:
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x04);
-+ break;
-+ }
-+}
-+
-+static void snd_allo_boss_clk_gpio(struct snd_soc_component *component)
-+{
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x24, 0x24);
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_3, 0x0f, 0x02);
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_6, 0x0f, 0x02);
-+}
-+
-+static bool snd_allo_boss_is_sclk(struct snd_soc_component *component)
-+{
-+ unsigned int sck;
-+
-+ snd_soc_component_read(component, PCM512x_RATE_DET_4, &sck);
-+ return (!(sck & 0x40));
-+}
-+
-+static bool snd_allo_boss_is_sclk_sleep(
-+ struct snd_soc_component *component)
-+{
-+ msleep(2);
-+ return snd_allo_boss_is_sclk(component);
-+}
-+
-+static bool snd_allo_boss_is_master_card(struct snd_soc_component *component)
-+{
-+ bool isClk44EN, isClk48En, isNoClk;
-+
-+ snd_allo_boss_clk_gpio(component);
-+
-+ snd_allo_boss_select_clk(component, ALLO_BOSS_CLK44EN);
-+ isClk44EN = snd_allo_boss_is_sclk_sleep(component);
-+
-+ snd_allo_boss_select_clk(component, ALLO_BOSS_NOCLOCK);
-+ isNoClk = snd_allo_boss_is_sclk_sleep(component);
-+
-+ snd_allo_boss_select_clk(component, ALLO_BOSS_CLK48EN);
-+ isClk48En = snd_allo_boss_is_sclk_sleep(component);
-+
-+ return (isClk44EN && isClk48En && !isNoClk);
-+}
-+
-+static int snd_allo_boss_clk_for_rate(int sample_rate)
-+{
-+ int type;
-+
-+ switch (sample_rate) {
-+ case 11025:
-+ case 22050:
-+ case 44100:
-+ case 88200:
-+ case 176400:
-+ case 352800:
-+ type = ALLO_BOSS_CLK44EN;
-+ break;
-+ default:
-+ type = ALLO_BOSS_CLK48EN;
-+ break;
-+ }
-+ return type;
-+}
-+
-+static void snd_allo_boss_set_sclk(struct snd_soc_component *component,
-+ int sample_rate)
-+{
-+ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
-+
-+ if (!IS_ERR(pcm512x->sclk)) {
-+ int ctype;
-+
-+ ctype = snd_allo_boss_clk_for_rate(sample_rate);
-+ clk_set_rate(pcm512x->sclk, (ctype == ALLO_BOSS_CLK44EN)
-+ ? CLK_44EN_RATE : CLK_48EN_RATE);
-+ snd_allo_boss_select_clk(component, ctype);
-+ }
-+}
-+
-+static int snd_allo_boss_init(struct snd_soc_pcm_runtime *rtd)
-+{
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+ struct pcm512x_priv *priv = snd_soc_component_get_drvdata(component);
-+
-+ if (slave)
-+ snd_soc_allo_boss_master = false;
-+ else
-+ snd_soc_allo_boss_master =
-+ snd_allo_boss_is_master_card(component);
-+
-+ if (snd_soc_allo_boss_master) {
-+ struct snd_soc_dai_link *dai = rtd->dai_link;
-+
-+ dai->name = "BossDAC";
-+ dai->stream_name = "Boss DAC HiFi [Master]";
-+ dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
-+ | SND_SOC_DAIFMT_CBM_CFM;
-+
-+ snd_soc_component_update_bits(component, PCM512x_BCLK_LRCLK_CFG, 0x31, 0x11);
-+ snd_soc_component_update_bits(component, PCM512x_MASTER_MODE, 0x03, 0x03);
-+ snd_soc_component_update_bits(component, PCM512x_MASTER_CLKDIV_2, 0x7f, 63);
-+ /*
-+ * Default sclk to CLK_48EN_RATE, otherwise codec
-+ * pcm512x_dai_startup_master method could call
-+ * snd_pcm_hw_constraint_ratnums using CLK_44EN/64
-+ * which will mask 384k sample rate.
-+ */
-+ if (!IS_ERR(priv->sclk))
-+ clk_set_rate(priv->sclk, CLK_48EN_RATE);
-+ } else {
-+ priv->sclk = ERR_PTR(-ENOENT);
-+ }
-+
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
-+
-+ if (digital_gain_0db_limit) {
-+ int ret;
-+ struct snd_soc_card *card = rtd->card;
-+
-+ ret = snd_soc_limit_volume(card, "Digital Playback Volume",
-+ 207);
-+ if (ret < 0)
-+ dev_warn(card->dev, "Failed to set volume limit: %d\n",
-+ ret);
-+ }
-+
-+ return 0;
-+}
-+
-+static int snd_allo_boss_update_rate_den(
-+ struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
-+{
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
-+ struct snd_ratnum *rats_no_pll;
-+ unsigned int num = 0, den = 0;
-+ int err;
-+
-+ rats_no_pll = devm_kzalloc(rtd->dev, sizeof(*rats_no_pll), GFP_KERNEL);
-+ if (!rats_no_pll)
-+ return -ENOMEM;
-+
-+ rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64;
-+ rats_no_pll->den_min = 1;
-+ rats_no_pll->den_max = 128;
-+ rats_no_pll->den_step = 1;
-+
-+ err = snd_interval_ratnum(hw_param_interval(params,
-+ SNDRV_PCM_HW_PARAM_RATE), 1, rats_no_pll, &num, &den);
-+ if (err >= 0 && den) {
-+ params->rate_num = num;
-+ params->rate_den = den;
-+ }
-+
-+ devm_kfree(rtd->dev, rats_no_pll);
-+ return 0;
-+}
-+
-+static void snd_allo_boss_gpio_mute(struct snd_soc_card *card)
-+{
-+ if (mute_gpio)
-+ gpiod_set_value_cansleep(mute_gpio, 1);
-+}
-+
-+static void snd_allo_boss_gpio_unmute(struct snd_soc_card *card)
-+{
-+ if (mute_gpio)
-+ gpiod_set_value_cansleep(mute_gpio, 0);
-+}
-+
-+static int snd_allo_boss_set_bias_level(struct snd_soc_card *card,
-+ struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level)
-+{
-+ struct snd_soc_pcm_runtime *rtd;
-+ struct snd_soc_dai *codec_dai;
-+
-+ rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
-+ codec_dai = rtd->codec_dai;
-+
-+ if (dapm->dev != codec_dai->dev)
-+ return 0;
-+
-+ switch (level) {
-+ case SND_SOC_BIAS_PREPARE:
-+ if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
-+ break;
-+ /* UNMUTE DAC */
-+ snd_allo_boss_gpio_unmute(card);
-+ break;
-+
-+ case SND_SOC_BIAS_STANDBY:
-+ if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
-+ break;
-+ /* MUTE DAC */
-+ snd_allo_boss_gpio_mute(card);
-+ break;
-+
-+ default:
-+ break;
-+ }
-+
-+ return 0;
-+}
-+
-+static int snd_allo_boss_hw_params(
-+ struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
-+{
-+ int ret = 0;
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+ int channels = params_channels(params);
-+ int width = snd_pcm_format_physical_width(params_format(params));
-+
-+ if (snd_soc_allo_boss_master) {
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+
-+ snd_allo_boss_set_sclk(component,
-+ params_rate(params));
-+
-+ ret = snd_allo_boss_update_rate_den(
-+ substream, params);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x03, 0x03,
-+ channels, width);
-+ if (ret)
-+ return ret;
-+ ret = snd_soc_dai_set_tdm_slot(rtd->codec_dai, 0x03, 0x03,
-+ channels, width);
-+ return ret;
-+}
-+
-+static int snd_allo_boss_startup(
-+ struct snd_pcm_substream *substream)
-+{
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+ struct snd_soc_card *card = rtd->card;
-+
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
-+ snd_allo_boss_gpio_mute(card);
-+
-+ if (snd_soc_allo_boss_master) {
-+ struct pcm512x_priv *priv = snd_soc_component_get_drvdata(component);
-+ /*
-+ * Default sclk to CLK_48EN_RATE, otherwise codec
-+ * pcm512x_dai_startup_master method could call
-+ * snd_pcm_hw_constraint_ratnums using CLK_44EN/64
-+ * which will mask 384k sample rate.
-+ */
-+ if (!IS_ERR(priv->sclk))
-+ clk_set_rate(priv->sclk, CLK_48EN_RATE);
-+ }
-+
-+ return 0;
-+}
-+
-+static void snd_allo_boss_shutdown(
-+ struct snd_pcm_substream *substream)
-+{
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+
-+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
-+}
-+
-+static int snd_allo_boss_prepare(
-+ struct snd_pcm_substream *substream)
-+{
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+ struct snd_soc_card *card = rtd->card;
-+
-+ snd_allo_boss_gpio_unmute(card);
-+ return 0;
-+}
-+/* machine stream operations */
-+static struct snd_soc_ops snd_allo_boss_ops = {
-+ .hw_params = snd_allo_boss_hw_params,
-+ .startup = snd_allo_boss_startup,
-+ .shutdown = snd_allo_boss_shutdown,
-+ .prepare = snd_allo_boss_prepare,
-+};
-+
-+static struct snd_soc_dai_link snd_allo_boss_dai[] = {
-+{
-+ .name = "Boss DAC",
-+ .stream_name = "Boss DAC HiFi",
-+ .cpu_dai_name = "bcm2708-i2s.0",
-+ .codec_dai_name = "pcm512x-hifi",
-+ .platform_name = "bcm2708-i2s.0",
-+ .codec_name = "pcm512x.1-004d",
-+ .dai_fmt = SND_SOC_DAIFMT_I2S |
-+ SND_SOC_DAIFMT_NB_NF |
-+ SND_SOC_DAIFMT_CBS_CFS,
-+ .ops = &snd_allo_boss_ops,
-+ .init = snd_allo_boss_init,
-+},
-+};
-+
-+/* audio machine driver */
-+static struct snd_soc_card snd_allo_boss = {
-+ .name = "BossDAC",
-+ .owner = THIS_MODULE,
-+ .dai_link = snd_allo_boss_dai,
-+ .num_links = ARRAY_SIZE(snd_allo_boss_dai),
-+};
-+
-+static int snd_allo_boss_probe(struct platform_device *pdev)
-+{
-+ int ret = 0;
-+
-+ snd_allo_boss.dev = &pdev->dev;
-+
-+ if (pdev->dev.of_node) {
-+ struct device_node *i2s_node;
-+ struct snd_soc_dai_link *dai;
-+
-+ dai = &snd_allo_boss_dai[0];
-+ i2s_node = of_parse_phandle(pdev->dev.of_node,
-+ "i2s-controller", 0);
-+
-+ if (i2s_node) {
-+ dai->cpu_dai_name = NULL;
-+ dai->cpu_of_node = i2s_node;
-+ dai->platform_name = NULL;
-+ dai->platform_of_node = i2s_node;
-+ }
-+
-+ digital_gain_0db_limit = !of_property_read_bool(
-+ pdev->dev.of_node, "allo,24db_digital_gain");
-+ slave = of_property_read_bool(pdev->dev.of_node,
-+ "allo,slave");
-+
-+ mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute",
-+ GPIOD_OUT_LOW);
-+ if (IS_ERR(mute_gpio)) {
-+ ret = PTR_ERR(mute_gpio);
-+ dev_err(&pdev->dev,
-+ "failed to get mute gpio: %d\n", ret);
-+ return ret;
-+ }
-+
-+ if (mute_gpio)
-+ snd_allo_boss.set_bias_level =
-+ snd_allo_boss_set_bias_level;
-+
-+ ret = snd_soc_register_card(&snd_allo_boss);
-+ if (ret) {
-+ dev_err(&pdev->dev,
-+ "snd_soc_register_card() failed: %d\n", ret);
-+ return ret;
-+ }
-+
-+ if (mute_gpio)
-+ snd_allo_boss_gpio_mute(&snd_allo_boss);
-+
-+ return 0;
-+ }
-+
-+ return -EINVAL;
-+}
-+
-+static int snd_allo_boss_remove(struct platform_device *pdev)
-+{
-+ snd_allo_boss_gpio_mute(&snd_allo_boss);
-+ return snd_soc_unregister_card(&snd_allo_boss);
-+}
-+
-+static const struct of_device_id snd_allo_boss_of_match[] = {
-+ { .compatible = "allo,boss-dac", },
-+ { /* sentinel */ },
-+};
-+MODULE_DEVICE_TABLE(of, snd_allo_boss_of_match);
-+
-+static struct platform_driver snd_allo_boss_driver = {
-+ .driver = {
-+ .name = "snd-allo-boss-dac",
-+ .owner = THIS_MODULE,
-+ .of_match_table = snd_allo_boss_of_match,
-+ },
-+ .probe = snd_allo_boss_probe,
-+ .remove = snd_allo_boss_remove,
-+};
-+
-+module_platform_driver(snd_allo_boss_driver);
-+
-+MODULE_AUTHOR("Baswaraj K <jaikumar@cem-solutions.net>");
-+MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Boss DAC");
-+MODULE_LICENSE("GPL v2");
projects / openwrt / openwrt.git / blobdiff