594 lines
16 KiB
C
594 lines
16 KiB
C
/*
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* ALSA SoC SPDIF Audio Layer
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*
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* Copyright 2015 Andrea Venturi <be17068@iperbole.bo.it>
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* Copyright 2015 Marcus Cooper <codekipper@gmail.com>
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*
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* Based on the Allwinner SDK driver, released under the GPL.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/regmap.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/reset.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#define SUN4I_SPDIF_CTL (0x00)
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#define SUN4I_SPDIF_CTL_MCLKDIV(v) ((v) << 4) /* v even */
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#define SUN4I_SPDIF_CTL_MCLKOUTEN BIT(2)
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#define SUN4I_SPDIF_CTL_GEN BIT(1)
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#define SUN4I_SPDIF_CTL_RESET BIT(0)
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#define SUN4I_SPDIF_TXCFG (0x04)
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#define SUN4I_SPDIF_TXCFG_SINGLEMOD BIT(31)
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#define SUN4I_SPDIF_TXCFG_ASS BIT(17)
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#define SUN4I_SPDIF_TXCFG_NONAUDIO BIT(16)
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#define SUN4I_SPDIF_TXCFG_TXRATIO(v) ((v) << 4)
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#define SUN4I_SPDIF_TXCFG_TXRATIO_MASK GENMASK(8, 4)
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#define SUN4I_SPDIF_TXCFG_FMTRVD GENMASK(3, 2)
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#define SUN4I_SPDIF_TXCFG_FMT16BIT (0 << 2)
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#define SUN4I_SPDIF_TXCFG_FMT20BIT (1 << 2)
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#define SUN4I_SPDIF_TXCFG_FMT24BIT (2 << 2)
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#define SUN4I_SPDIF_TXCFG_CHSTMODE BIT(1)
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#define SUN4I_SPDIF_TXCFG_TXEN BIT(0)
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#define SUN4I_SPDIF_RXCFG (0x08)
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#define SUN4I_SPDIF_RXCFG_LOCKFLAG BIT(4)
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#define SUN4I_SPDIF_RXCFG_CHSTSRC BIT(3)
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#define SUN4I_SPDIF_RXCFG_CHSTCP BIT(1)
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#define SUN4I_SPDIF_RXCFG_RXEN BIT(0)
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#define SUN4I_SPDIF_TXFIFO (0x0C)
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#define SUN4I_SPDIF_RXFIFO (0x10)
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#define SUN4I_SPDIF_FCTL (0x14)
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#define SUN4I_SPDIF_FCTL_FIFOSRC BIT(31)
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#define SUN4I_SPDIF_FCTL_FTX BIT(17)
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#define SUN4I_SPDIF_FCTL_FRX BIT(16)
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#define SUN4I_SPDIF_FCTL_TXTL(v) ((v) << 8)
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#define SUN4I_SPDIF_FCTL_TXTL_MASK GENMASK(12, 8)
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#define SUN4I_SPDIF_FCTL_RXTL(v) ((v) << 3)
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#define SUN4I_SPDIF_FCTL_RXTL_MASK GENMASK(7, 3)
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#define SUN4I_SPDIF_FCTL_TXIM BIT(2)
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#define SUN4I_SPDIF_FCTL_RXOM(v) ((v) << 0)
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#define SUN4I_SPDIF_FCTL_RXOM_MASK GENMASK(1, 0)
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#define SUN4I_SPDIF_FSTA (0x18)
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#define SUN4I_SPDIF_FSTA_TXE BIT(14)
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#define SUN4I_SPDIF_FSTA_TXECNTSHT (8)
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#define SUN4I_SPDIF_FSTA_RXA BIT(6)
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#define SUN4I_SPDIF_FSTA_RXACNTSHT (0)
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#define SUN4I_SPDIF_INT (0x1C)
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#define SUN4I_SPDIF_INT_RXLOCKEN BIT(18)
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#define SUN4I_SPDIF_INT_RXUNLOCKEN BIT(17)
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#define SUN4I_SPDIF_INT_RXPARERREN BIT(16)
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#define SUN4I_SPDIF_INT_TXDRQEN BIT(7)
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#define SUN4I_SPDIF_INT_TXUIEN BIT(6)
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#define SUN4I_SPDIF_INT_TXOIEN BIT(5)
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#define SUN4I_SPDIF_INT_TXEIEN BIT(4)
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#define SUN4I_SPDIF_INT_RXDRQEN BIT(2)
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#define SUN4I_SPDIF_INT_RXOIEN BIT(1)
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#define SUN4I_SPDIF_INT_RXAIEN BIT(0)
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#define SUN4I_SPDIF_ISTA (0x20)
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#define SUN4I_SPDIF_ISTA_RXLOCKSTA BIT(18)
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#define SUN4I_SPDIF_ISTA_RXUNLOCKSTA BIT(17)
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#define SUN4I_SPDIF_ISTA_RXPARERRSTA BIT(16)
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#define SUN4I_SPDIF_ISTA_TXUSTA BIT(6)
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#define SUN4I_SPDIF_ISTA_TXOSTA BIT(5)
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#define SUN4I_SPDIF_ISTA_TXESTA BIT(4)
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#define SUN4I_SPDIF_ISTA_RXOSTA BIT(1)
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#define SUN4I_SPDIF_ISTA_RXASTA BIT(0)
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#define SUN8I_SPDIF_TXFIFO (0x20)
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#define SUN4I_SPDIF_TXCNT (0x24)
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#define SUN4I_SPDIF_RXCNT (0x28)
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#define SUN4I_SPDIF_TXCHSTA0 (0x2C)
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#define SUN4I_SPDIF_TXCHSTA0_CLK(v) ((v) << 28)
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#define SUN4I_SPDIF_TXCHSTA0_SAMFREQ(v) ((v) << 24)
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#define SUN4I_SPDIF_TXCHSTA0_SAMFREQ_MASK GENMASK(27, 24)
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#define SUN4I_SPDIF_TXCHSTA0_CHNUM(v) ((v) << 20)
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#define SUN4I_SPDIF_TXCHSTA0_CHNUM_MASK GENMASK(23, 20)
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#define SUN4I_SPDIF_TXCHSTA0_SRCNUM(v) ((v) << 16)
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#define SUN4I_SPDIF_TXCHSTA0_CATACOD(v) ((v) << 8)
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#define SUN4I_SPDIF_TXCHSTA0_MODE(v) ((v) << 6)
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#define SUN4I_SPDIF_TXCHSTA0_EMPHASIS(v) ((v) << 3)
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#define SUN4I_SPDIF_TXCHSTA0_CP BIT(2)
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#define SUN4I_SPDIF_TXCHSTA0_AUDIO BIT(1)
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#define SUN4I_SPDIF_TXCHSTA0_PRO BIT(0)
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#define SUN4I_SPDIF_TXCHSTA1 (0x30)
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#define SUN4I_SPDIF_TXCHSTA1_CGMSA(v) ((v) << 8)
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#define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ(v) ((v) << 4)
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#define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ_MASK GENMASK(7, 4)
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#define SUN4I_SPDIF_TXCHSTA1_SAMWORDLEN(v) ((v) << 1)
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#define SUN4I_SPDIF_TXCHSTA1_MAXWORDLEN BIT(0)
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#define SUN4I_SPDIF_RXCHSTA0 (0x34)
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#define SUN4I_SPDIF_RXCHSTA0_CLK(v) ((v) << 28)
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#define SUN4I_SPDIF_RXCHSTA0_SAMFREQ(v) ((v) << 24)
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#define SUN4I_SPDIF_RXCHSTA0_CHNUM(v) ((v) << 20)
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#define SUN4I_SPDIF_RXCHSTA0_SRCNUM(v) ((v) << 16)
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#define SUN4I_SPDIF_RXCHSTA0_CATACOD(v) ((v) << 8)
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#define SUN4I_SPDIF_RXCHSTA0_MODE(v) ((v) << 6)
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#define SUN4I_SPDIF_RXCHSTA0_EMPHASIS(v) ((v) << 3)
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#define SUN4I_SPDIF_RXCHSTA0_CP BIT(2)
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#define SUN4I_SPDIF_RXCHSTA0_AUDIO BIT(1)
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#define SUN4I_SPDIF_RXCHSTA0_PRO BIT(0)
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#define SUN4I_SPDIF_RXCHSTA1 (0x38)
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#define SUN4I_SPDIF_RXCHSTA1_CGMSA(v) ((v) << 8)
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#define SUN4I_SPDIF_RXCHSTA1_ORISAMFREQ(v) ((v) << 4)
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#define SUN4I_SPDIF_RXCHSTA1_SAMWORDLEN(v) ((v) << 1)
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#define SUN4I_SPDIF_RXCHSTA1_MAXWORDLEN BIT(0)
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/* Defines for Sampling Frequency */
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#define SUN4I_SPDIF_SAMFREQ_44_1KHZ 0x0
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#define SUN4I_SPDIF_SAMFREQ_NOT_INDICATED 0x1
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#define SUN4I_SPDIF_SAMFREQ_48KHZ 0x2
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#define SUN4I_SPDIF_SAMFREQ_32KHZ 0x3
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#define SUN4I_SPDIF_SAMFREQ_22_05KHZ 0x4
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#define SUN4I_SPDIF_SAMFREQ_24KHZ 0x6
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#define SUN4I_SPDIF_SAMFREQ_88_2KHZ 0x8
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#define SUN4I_SPDIF_SAMFREQ_76_8KHZ 0x9
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#define SUN4I_SPDIF_SAMFREQ_96KHZ 0xa
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#define SUN4I_SPDIF_SAMFREQ_176_4KHZ 0xc
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#define SUN4I_SPDIF_SAMFREQ_192KHZ 0xe
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struct sun4i_spdif_dev {
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struct platform_device *pdev;
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struct clk *spdif_clk;
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struct clk *apb_clk;
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struct reset_control *rst;
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struct snd_soc_dai_driver cpu_dai_drv;
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struct regmap *regmap;
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struct snd_dmaengine_dai_dma_data dma_params_tx;
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};
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static void sun4i_spdif_configure(struct sun4i_spdif_dev *host)
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{
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/* soft reset SPDIF */
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regmap_write(host->regmap, SUN4I_SPDIF_CTL, SUN4I_SPDIF_CTL_RESET);
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/* flush TX FIFO */
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regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
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SUN4I_SPDIF_FCTL_FTX, SUN4I_SPDIF_FCTL_FTX);
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/* clear TX counter */
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regmap_write(host->regmap, SUN4I_SPDIF_TXCNT, 0);
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}
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static void sun4i_snd_txctrl_on(struct snd_pcm_substream *substream,
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struct sun4i_spdif_dev *host)
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{
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if (substream->runtime->channels == 1)
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regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
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SUN4I_SPDIF_TXCFG_SINGLEMOD,
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SUN4I_SPDIF_TXCFG_SINGLEMOD);
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/* SPDIF TX ENABLE */
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regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
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SUN4I_SPDIF_TXCFG_TXEN, SUN4I_SPDIF_TXCFG_TXEN);
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/* DRQ ENABLE */
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regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
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SUN4I_SPDIF_INT_TXDRQEN, SUN4I_SPDIF_INT_TXDRQEN);
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/* Global enable */
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regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
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SUN4I_SPDIF_CTL_GEN, SUN4I_SPDIF_CTL_GEN);
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}
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static void sun4i_snd_txctrl_off(struct snd_pcm_substream *substream,
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struct sun4i_spdif_dev *host)
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{
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/* SPDIF TX DISABLE */
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regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
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SUN4I_SPDIF_TXCFG_TXEN, 0);
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/* DRQ DISABLE */
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regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
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SUN4I_SPDIF_INT_TXDRQEN, 0);
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/* Global disable */
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regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
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SUN4I_SPDIF_CTL_GEN, 0);
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}
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static int sun4i_spdif_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *cpu_dai)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(rtd->cpu_dai);
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if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
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return -EINVAL;
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sun4i_spdif_configure(host);
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return 0;
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}
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static int sun4i_spdif_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *cpu_dai)
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{
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int ret = 0;
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int fmt;
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unsigned long rate = params_rate(params);
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u32 mclk_div = 0;
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unsigned int mclk = 0;
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u32 reg_val;
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struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
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struct platform_device *pdev = host->pdev;
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/* Add the PCM and raw data select interface */
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switch (params_channels(params)) {
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case 1: /* PCM mode */
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case 2:
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fmt = 0;
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break;
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case 4: /* raw data mode */
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fmt = SUN4I_SPDIF_TXCFG_NONAUDIO;
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break;
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default:
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return -EINVAL;
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}
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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fmt |= SUN4I_SPDIF_TXCFG_FMT16BIT;
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break;
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case SNDRV_PCM_FORMAT_S20_3LE:
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fmt |= SUN4I_SPDIF_TXCFG_FMT20BIT;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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fmt |= SUN4I_SPDIF_TXCFG_FMT24BIT;
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break;
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default:
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return -EINVAL;
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}
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switch (rate) {
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case 22050:
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case 44100:
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case 88200:
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case 176400:
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mclk = 22579200;
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break;
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case 24000:
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case 32000:
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case 48000:
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case 96000:
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case 192000:
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mclk = 24576000;
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break;
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default:
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return -EINVAL;
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}
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ret = clk_set_rate(host->spdif_clk, mclk);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"Setting SPDIF clock rate for %d Hz failed!\n", mclk);
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return ret;
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}
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regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
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SUN4I_SPDIF_FCTL_TXIM, SUN4I_SPDIF_FCTL_TXIM);
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switch (rate) {
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case 22050:
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case 24000:
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mclk_div = 8;
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break;
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case 32000:
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mclk_div = 6;
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break;
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case 44100:
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case 48000:
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mclk_div = 4;
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break;
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case 88200:
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case 96000:
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mclk_div = 2;
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break;
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case 176400:
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case 192000:
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mclk_div = 1;
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break;
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default:
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return -EINVAL;
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}
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reg_val = 0;
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reg_val |= SUN4I_SPDIF_TXCFG_ASS;
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reg_val |= fmt; /* set non audio and bit depth */
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reg_val |= SUN4I_SPDIF_TXCFG_CHSTMODE;
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reg_val |= SUN4I_SPDIF_TXCFG_TXRATIO(mclk_div - 1);
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regmap_write(host->regmap, SUN4I_SPDIF_TXCFG, reg_val);
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return 0;
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}
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static int sun4i_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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int ret = 0;
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struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
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if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
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return -EINVAL;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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sun4i_snd_txctrl_on(substream, host);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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sun4i_snd_txctrl_off(substream, host);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int sun4i_spdif_soc_dai_probe(struct snd_soc_dai *dai)
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{
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struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
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snd_soc_dai_init_dma_data(dai, &host->dma_params_tx, NULL);
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return 0;
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}
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static const struct snd_soc_dai_ops sun4i_spdif_dai_ops = {
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.startup = sun4i_spdif_startup,
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.trigger = sun4i_spdif_trigger,
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.hw_params = sun4i_spdif_hw_params,
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};
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static const struct regmap_config sun4i_spdif_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 32,
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.max_register = SUN4I_SPDIF_RXCHSTA1,
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};
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#define SUN4I_RATES SNDRV_PCM_RATE_8000_192000
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#define SUN4I_FORMATS (SNDRV_PCM_FORMAT_S16_LE | \
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SNDRV_PCM_FORMAT_S20_3LE | \
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SNDRV_PCM_FORMAT_S24_LE)
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static struct snd_soc_dai_driver sun4i_spdif_dai = {
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.playback = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = SUN4I_RATES,
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.formats = SUN4I_FORMATS,
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},
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.probe = sun4i_spdif_soc_dai_probe,
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.ops = &sun4i_spdif_dai_ops,
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.name = "spdif",
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};
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struct sun4i_spdif_quirks {
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unsigned int reg_dac_txdata; /* TX FIFO offset for DMA config */
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bool has_reset;
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};
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static const struct sun4i_spdif_quirks sun4i_a10_spdif_quirks = {
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.reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
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};
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static const struct sun4i_spdif_quirks sun6i_a31_spdif_quirks = {
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.reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
|
|
.has_reset = true,
|
|
};
|
|
|
|
static const struct sun4i_spdif_quirks sun8i_h3_spdif_quirks = {
|
|
.reg_dac_txdata = SUN8I_SPDIF_TXFIFO,
|
|
.has_reset = true,
|
|
};
|
|
|
|
static const struct of_device_id sun4i_spdif_of_match[] = {
|
|
{
|
|
.compatible = "allwinner,sun4i-a10-spdif",
|
|
.data = &sun4i_a10_spdif_quirks,
|
|
},
|
|
{
|
|
.compatible = "allwinner,sun6i-a31-spdif",
|
|
.data = &sun6i_a31_spdif_quirks,
|
|
},
|
|
{
|
|
.compatible = "allwinner,sun8i-h3-spdif",
|
|
.data = &sun8i_h3_spdif_quirks,
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sun4i_spdif_of_match);
|
|
|
|
static const struct snd_soc_component_driver sun4i_spdif_component = {
|
|
.name = "sun4i-spdif",
|
|
};
|
|
|
|
static int sun4i_spdif_runtime_suspend(struct device *dev)
|
|
{
|
|
struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
|
|
|
|
clk_disable_unprepare(host->spdif_clk);
|
|
clk_disable_unprepare(host->apb_clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sun4i_spdif_runtime_resume(struct device *dev)
|
|
{
|
|
struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(host->spdif_clk);
|
|
if (ret)
|
|
return ret;
|
|
ret = clk_prepare_enable(host->apb_clk);
|
|
if (ret)
|
|
clk_disable_unprepare(host->spdif_clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sun4i_spdif_probe(struct platform_device *pdev)
|
|
{
|
|
struct sun4i_spdif_dev *host;
|
|
struct resource *res;
|
|
const struct sun4i_spdif_quirks *quirks;
|
|
int ret;
|
|
void __iomem *base;
|
|
|
|
dev_dbg(&pdev->dev, "Entered %s\n", __func__);
|
|
|
|
host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
|
|
if (!host)
|
|
return -ENOMEM;
|
|
|
|
host->pdev = pdev;
|
|
|
|
/* Initialize this copy of the CPU DAI driver structure */
|
|
memcpy(&host->cpu_dai_drv, &sun4i_spdif_dai, sizeof(sun4i_spdif_dai));
|
|
host->cpu_dai_drv.name = dev_name(&pdev->dev);
|
|
|
|
/* Get the addresses */
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
quirks = of_device_get_match_data(&pdev->dev);
|
|
if (quirks == NULL) {
|
|
dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
host->regmap = devm_regmap_init_mmio(&pdev->dev, base,
|
|
&sun4i_spdif_regmap_config);
|
|
|
|
/* Clocks */
|
|
host->apb_clk = devm_clk_get(&pdev->dev, "apb");
|
|
if (IS_ERR(host->apb_clk)) {
|
|
dev_err(&pdev->dev, "failed to get a apb clock.\n");
|
|
return PTR_ERR(host->apb_clk);
|
|
}
|
|
|
|
host->spdif_clk = devm_clk_get(&pdev->dev, "spdif");
|
|
if (IS_ERR(host->spdif_clk)) {
|
|
dev_err(&pdev->dev, "failed to get a spdif clock.\n");
|
|
return PTR_ERR(host->spdif_clk);
|
|
}
|
|
|
|
host->dma_params_tx.addr = res->start + quirks->reg_dac_txdata;
|
|
host->dma_params_tx.maxburst = 8;
|
|
host->dma_params_tx.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
|
|
|
|
platform_set_drvdata(pdev, host);
|
|
|
|
if (quirks->has_reset) {
|
|
host->rst = devm_reset_control_get_optional_exclusive(&pdev->dev,
|
|
NULL);
|
|
if (IS_ERR(host->rst) && PTR_ERR(host->rst) == -EPROBE_DEFER) {
|
|
ret = -EPROBE_DEFER;
|
|
dev_err(&pdev->dev, "Failed to get reset: %d\n", ret);
|
|
return ret;
|
|
}
|
|
if (!IS_ERR(host->rst))
|
|
reset_control_deassert(host->rst);
|
|
}
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev,
|
|
&sun4i_spdif_component, &sun4i_spdif_dai, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
if (!pm_runtime_enabled(&pdev->dev)) {
|
|
ret = sun4i_spdif_runtime_resume(&pdev->dev);
|
|
if (ret)
|
|
goto err_unregister;
|
|
}
|
|
|
|
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
|
|
if (ret)
|
|
goto err_suspend;
|
|
return 0;
|
|
err_suspend:
|
|
if (!pm_runtime_status_suspended(&pdev->dev))
|
|
sun4i_spdif_runtime_suspend(&pdev->dev);
|
|
err_unregister:
|
|
pm_runtime_disable(&pdev->dev);
|
|
return ret;
|
|
}
|
|
|
|
static int sun4i_spdif_remove(struct platform_device *pdev)
|
|
{
|
|
pm_runtime_disable(&pdev->dev);
|
|
if (!pm_runtime_status_suspended(&pdev->dev))
|
|
sun4i_spdif_runtime_suspend(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops sun4i_spdif_pm = {
|
|
SET_RUNTIME_PM_OPS(sun4i_spdif_runtime_suspend,
|
|
sun4i_spdif_runtime_resume, NULL)
|
|
};
|
|
|
|
static struct platform_driver sun4i_spdif_driver = {
|
|
.driver = {
|
|
.name = "sun4i-spdif",
|
|
.of_match_table = of_match_ptr(sun4i_spdif_of_match),
|
|
.pm = &sun4i_spdif_pm,
|
|
},
|
|
.probe = sun4i_spdif_probe,
|
|
.remove = sun4i_spdif_remove,
|
|
};
|
|
|
|
module_platform_driver(sun4i_spdif_driver);
|
|
|
|
MODULE_AUTHOR("Marcus Cooper <codekipper@gmail.com>");
|
|
MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
|
|
MODULE_DESCRIPTION("Allwinner sun4i SPDIF SoC Interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:sun4i-spdif");
|