From a1383655cfaa71609d6236ae0fcf3b6047462b98 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Sat, 29 Feb 2020 09:25:20 +0100 Subject: bcm27xx: add linux 5.4 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Tested on bcm2710 (Raspberry Pi 3B). Signed-off-by: Álvaro Fernández Rojas --- ...-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch | 675 +++++++++++++++++++++ 1 file changed, 675 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.4/950-0070-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch (limited to 'target/linux/bcm27xx/patches-5.4/950-0070-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch') diff --git a/target/linux/bcm27xx/patches-5.4/950-0070-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch b/target/linux/bcm27xx/patches-5.4/950-0070-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch new file mode 100644 index 0000000000..2ec0d6f604 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0070-Add-support-for-Allo-Boss-DAC-add-on-board-for-Raspb.patch @@ -0,0 +1,675 @@ +From 7a13759deeaae55840571574e32e00f0e5902661 Mon Sep 17 00:00:00 2001 +From: BabuSubashChandar +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 +Reviewed-by: Deepak +Reviewed-by: BabuSubashChandar + +Add support for new clock rate and mute gpios. + +Signed-off-by: Baswaraj K +Reviewed-by: Deepak +Reviewed-by: BabuSubashChandar + +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 + +ASoC: allo-boss-dac: transmit S24_LE with 64 BCLK cycles + +Signed-off-by: Matthias Reichl + +allo-boss-dac: switch to snd_soc_dai_set_bclk_ratio + +Signed-off-by: Matthias Reichl + +ASoC: allo-boss-dac: use modern dai_link style + +Signed-off-by: Hui Wang +--- + 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 ++ * 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 ++#include ++#include ++#include ++#include ++#include ++#include ++ ++/* 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 = 0; ++ 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 ++ * Copyright 2017 ++ * based on code by Daniel Matuschek, ++ * Stuart MacLean ++ * based on code by Florian Meier ++ * ++ * 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 ++#include ++#include ++#include ++#include ++ ++#include ++#include ++#include ++#include ++#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_bclk_ratio(rtd->cpu_dai, channels * width); ++ if (ret) ++ return ret; ++ ret = snd_soc_dai_set_bclk_ratio(rtd->codec_dai, 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, ++}; ++ ++SND_SOC_DAILINK_DEFS(allo_boss, ++ DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), ++ DAILINK_COMP_ARRAY(COMP_CODEC("pcm512x.1-004d", "pcm512x-hifi")), ++ DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); ++ ++static struct snd_soc_dai_link snd_allo_boss_dai[] = { ++{ ++ .name = "Boss DAC", ++ .stream_name = "Boss DAC HiFi", ++ .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, ++ SND_SOC_DAILINK_REG(allo_boss), ++}, ++}; ++ ++/* 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->cpus->dai_name = NULL; ++ dai->cpus->of_node = i2s_node; ++ dai->platforms->name = NULL; ++ dai->platforms->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 "); ++MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Boss DAC"); ++MODULE_LICENSE("GPL v2"); -- cgit v1.2.3