ASoC: add support for the Freescale P1022 DS reference board
The Freescale P1022 is a dual-core e500-based SOC with multimedia capabilities, specifically the same SSI audio controller on the MPC8610. The P1022 DS reference board includes a P1022 and a Wolfson Microelectronics WM8776 codec. Signed-off-by: Timur Tabi <timur@freescale.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Timur Tabi
Mark Brown
parent
b9c1261db4
commit
27ef3744f8
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@ -1,24 +1,36 @@
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config SND_MPC52xx_DMA
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tristate
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# ASoC platform support for the Freescale MPC8610 SOC. This compiles drivers
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# for the SSI and the Elo DMA controller. You will still need to select
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# a platform driver and a codec driver.
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config SND_SOC_MPC8610
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# ASoC platform support for the Freescale PowerPC SOCs that have an SSI and
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# an Elo DMA controller, such as the MPC8610 and P1022. You will still need to
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# select a platform driver and a codec driver.
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config SND_SOC_POWERPC_SSI
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tristate
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depends on MPC8610
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depends on FSL_SOC
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config SND_SOC_MPC8610_HPCD
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tristate "ALSA SoC support for the Freescale MPC8610 HPCD board"
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# I2C is necessary for the CS4270 driver
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depends on MPC8610_HPCD && I2C
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select SND_SOC_MPC8610
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select SND_SOC_POWERPC_SSI
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select SND_SOC_CS4270
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select SND_SOC_CS4270_VD33_ERRATA
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default y if MPC8610_HPCD
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help
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Say Y if you want to enable audio on the Freescale MPC8610 HPCD.
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config SND_SOC_P1022_DS
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tristate "ALSA SoC support for the Freescale P1022 DS board"
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# I2C is necessary for the WM8776 driver
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depends on P1022_DS && I2C
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select SND_SOC_POWERPC_SSI
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select SND_SOC_WM8776
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default y if P1022_DS
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help
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Say Y if you want to enable audio on the Freescale P1022 DS board.
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This will also include the Wolfson Microelectronics WM8776 codec
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driver.
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config SND_SOC_MPC5200_I2S
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tristate "Freescale MPC5200 PSC in I2S mode driver"
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depends on PPC_MPC52xx && PPC_BESTCOMM
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@ -2,10 +2,14 @@
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snd-soc-mpc8610-hpcd-objs := mpc8610_hpcd.o
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obj-$(CONFIG_SND_SOC_MPC8610_HPCD) += snd-soc-mpc8610-hpcd.o
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# MPC8610 Platform Support
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# P1022 DS Machine Support
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snd-soc-p1022-ds-objs := p1022_ds.o
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obj-$(CONFIG_SND_SOC_P1022_DS) += snd-soc-p1022-ds.o
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# Freescale PowerPC SSI/DMA Platform Support
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snd-soc-fsl-ssi-objs := fsl_ssi.o
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snd-soc-fsl-dma-objs := fsl_dma.o
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obj-$(CONFIG_SND_SOC_MPC8610) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o
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obj-$(CONFIG_SND_SOC_POWERPC_SSI) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o
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# MPC5200 Platform Support
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obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o
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@ -0,0 +1,590 @@
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/**
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* Freescale P1022DS ALSA SoC Machine driver
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*
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* Author: Timur Tabi <timur@freescale.com>
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*
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* Copyright 2010 Freescale Semiconductor, Inc.
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/of_device.h>
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#include <linux/slab.h>
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#include <sound/soc.h>
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#include <asm/fsl_guts.h>
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#include "fsl_dma.h"
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#include "fsl_ssi.h"
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/* P1022-specific PMUXCR and DMUXCR bit definitions */
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#define CCSR_GUTS_PMUXCR_UART0_I2C1_MASK 0x0001c000
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#define CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI 0x00010000
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#define CCSR_GUTS_PMUXCR_UART0_I2C1_SSI 0x00018000
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#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK 0x00000c00
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#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI 0x00000000
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#define CCSR_GUTS_DMUXCR_PAD 1 /* DMA controller/channel set to pad */
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#define CCSR_GUTS_DMUXCR_SSI 2 /* DMA controller/channel set to SSI */
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/*
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* Set the DMACR register in the GUTS
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*
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* The DMACR register determines the source of initiated transfers for each
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* channel on each DMA controller. Rather than have a bunch of repetitive
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* macros for the bit patterns, we just have a function that calculates
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* them.
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*
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* guts: Pointer to GUTS structure
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* co: The DMA controller (0 or 1)
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* ch: The channel on the DMA controller (0, 1, 2, or 3)
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* device: The device to set as the target (CCSR_GUTS_DMUXCR_xxx)
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*/
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static inline void guts_set_dmuxcr(struct ccsr_guts_85xx __iomem *guts,
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unsigned int co, unsigned int ch, unsigned int device)
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{
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unsigned int shift = 16 + (8 * (1 - co) + 2 * (3 - ch));
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clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
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}
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/* There's only one global utilities register */
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static phys_addr_t guts_phys;
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#define DAI_NAME_SIZE 32
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/**
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* machine_data: machine-specific ASoC device data
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*
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* This structure contains data for a single sound platform device on an
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* P1022 DS. Some of the data is taken from the device tree.
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*/
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struct machine_data {
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struct snd_soc_dai_link dai[2];
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struct snd_soc_card card;
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unsigned int dai_format;
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unsigned int codec_clk_direction;
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unsigned int cpu_clk_direction;
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unsigned int clk_frequency;
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unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */
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unsigned int dma_id[2]; /* 0 = DMA1, 1 = DMA2, etc */
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unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
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char codec_name[DAI_NAME_SIZE];
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char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
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};
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/**
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* p1022_ds_machine_probe: initialize the board
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*
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* This function is used to initialize the board-specific hardware.
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*
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* Here we program the DMACR and PMUXCR registers.
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*/
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static int p1022_ds_machine_probe(struct platform_device *sound_device)
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{
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struct snd_soc_card *card = platform_get_drvdata(sound_device);
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struct machine_data *mdata =
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container_of(card, struct machine_data, card);
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struct ccsr_guts_85xx __iomem *guts;
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guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
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if (!guts) {
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dev_err(card->dev, "could not map global utilities\n");
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return -ENOMEM;
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}
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/* Enable SSI Tx signal */
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clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
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CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI);
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/* Enable SSI Rx signal */
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clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
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CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI);
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/* Enable DMA Channel for SSI */
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guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0],
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CCSR_GUTS_DMUXCR_SSI);
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guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1],
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CCSR_GUTS_DMUXCR_SSI);
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iounmap(guts);
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return 0;
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}
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/**
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* p1022_ds_startup: program the board with various hardware parameters
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*
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* This function takes board-specific information, like clock frequencies
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* and serial data formats, and passes that information to the codec and
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* transport drivers.
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*/
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static int p1022_ds_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct machine_data *mdata =
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container_of(rtd->card, struct machine_data, card);
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struct device *dev = rtd->card->dev;
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int ret = 0;
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/* Tell the codec driver what the serial protocol is. */
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ret = snd_soc_dai_set_fmt(rtd->codec_dai, mdata->dai_format);
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if (ret < 0) {
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dev_err(dev, "could not set codec driver audio format\n");
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return ret;
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}
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/*
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* Tell the codec driver what the MCLK frequency is, and whether it's
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* a slave or master.
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*/
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ret = snd_soc_dai_set_sysclk(rtd->codec_dai, 0, mdata->clk_frequency,
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mdata->codec_clk_direction);
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if (ret < 0) {
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dev_err(dev, "could not set codec driver clock params\n");
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return ret;
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}
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return 0;
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}
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/**
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* p1022_ds_machine_remove: Remove the sound device
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*
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* This function is called to remove the sound device for one SSI. We
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* de-program the DMACR and PMUXCR register.
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*/
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static int p1022_ds_machine_remove(struct platform_device *sound_device)
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{
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struct snd_soc_card *card = platform_get_drvdata(sound_device);
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struct machine_data *mdata =
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container_of(card, struct machine_data, card);
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struct ccsr_guts_85xx __iomem *guts;
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guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
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if (!guts) {
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dev_err(card->dev, "could not map global utilities\n");
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return -ENOMEM;
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}
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/* Restore the signal routing */
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clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK);
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clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK);
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guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0], 0);
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guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1], 0);
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iounmap(guts);
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return 0;
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}
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/**
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* p1022_ds_ops: ASoC machine driver operations
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*/
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static struct snd_soc_ops p1022_ds_ops = {
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.startup = p1022_ds_startup,
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};
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/**
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* get_node_by_phandle_name - get a node by its phandle name
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*
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* This function takes a node, the name of a property in that node, and a
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* compatible string. Assuming the property is a phandle to another node,
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* it returns that node, (optionally) if that node is compatible.
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*
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* If the property is not a phandle, or the node it points to is not compatible
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* with the specific string, then NULL is returned.
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*/
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static struct device_node *get_node_by_phandle_name(struct device_node *np,
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const char *name, const char *compatible)
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{
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np = of_parse_phandle(np, name, 0);
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if (!np)
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return NULL;
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if (!of_device_is_compatible(np, compatible)) {
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of_node_put(np);
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return NULL;
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}
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return np;
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}
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/**
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* get_parent_cell_index -- return the cell-index of the parent of a node
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*
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* Return the value of the cell-index property of the parent of the given
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* node. This is used for DMA channel nodes that need to know the DMA ID
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* of the controller they are on.
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*/
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static int get_parent_cell_index(struct device_node *np)
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{
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struct device_node *parent = of_get_parent(np);
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const u32 *iprop;
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int ret = -1;
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if (!parent)
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return -1;
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iprop = of_get_property(parent, "cell-index", NULL);
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if (iprop)
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ret = *iprop;
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of_node_put(parent);
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return ret;
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}
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/**
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* codec_node_dev_name - determine the dev_name for a codec node
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*
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* This function determines the dev_name for an I2C node. This is the name
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* that would be returned by dev_name() if this device_node were part of a
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* 'struct device' It's ugly and hackish, but it works.
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*
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* The dev_name for such devices include the bus number and I2C address. For
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* example, "cs4270-codec.0-004f".
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*/
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static int codec_node_dev_name(struct device_node *np, char *buf, size_t len)
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{
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const u32 *iprop;
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int bus, addr;
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char temp[DAI_NAME_SIZE];
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of_modalias_node(np, temp, DAI_NAME_SIZE);
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iprop = of_get_property(np, "reg", NULL);
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if (!iprop)
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return -EINVAL;
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addr = *iprop;
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bus = get_parent_cell_index(np);
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if (bus < 0)
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return bus;
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snprintf(buf, len, "%s-codec.%u-%04x", temp, bus, addr);
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return 0;
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}
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static int get_dma_channel(struct device_node *ssi_np,
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const char *compatible,
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struct snd_soc_dai_link *dai,
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unsigned int *dma_channel_id,
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unsigned int *dma_id)
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{
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struct resource res;
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struct device_node *dma_channel_np;
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const u32 *iprop;
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int ret;
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dma_channel_np = get_node_by_phandle_name(ssi_np, compatible,
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"fsl,ssi-dma-channel");
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if (!dma_channel_np)
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return -EINVAL;
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/* Determine the dev_name for the device_node. This code mimics the
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* behavior of of_device_make_bus_id(). We need this because ASoC uses
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* the dev_name() of the device to match the platform (DMA) device with
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* the CPU (SSI) device. It's all ugly and hackish, but it works (for
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* now).
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*
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* dai->platform name should already point to an allocated buffer.
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*/
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ret = of_address_to_resource(dma_channel_np, 0, &res);
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if (ret)
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return ret;
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snprintf((char *)dai->platform_name, DAI_NAME_SIZE, "%llx.%s",
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(unsigned long long) res.start, dma_channel_np->name);
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iprop = of_get_property(dma_channel_np, "cell-index", NULL);
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if (!iprop) {
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of_node_put(dma_channel_np);
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return -EINVAL;
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}
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*dma_channel_id = *iprop;
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*dma_id = get_parent_cell_index(dma_channel_np);
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of_node_put(dma_channel_np);
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return 0;
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}
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/**
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* p1022_ds_probe: platform probe function for the machine driver
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*
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* Although this is a machine driver, the SSI node is the "master" node with
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* respect to audio hardware connections. Therefore, we create a new ASoC
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* device for each new SSI node that has a codec attached.
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*/
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static int p1022_ds_probe(struct platform_device *pdev)
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{
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struct device *dev = pdev->dev.parent;
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/* ssi_pdev is the platform device for the SSI node that probed us */
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struct platform_device *ssi_pdev =
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container_of(dev, struct platform_device, dev);
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struct device_node *np = ssi_pdev->dev.of_node;
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struct device_node *codec_np = NULL;
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struct platform_device *sound_device = NULL;
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struct machine_data *mdata;
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int ret = -ENODEV;
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const char *sprop;
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const u32 *iprop;
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/* Find the codec node for this SSI. */
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codec_np = of_parse_phandle(np, "codec-handle", 0);
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if (!codec_np) {
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dev_err(dev, "could not find codec node\n");
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return -EINVAL;
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}
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mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL);
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if (!mdata)
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return -ENOMEM;
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mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
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mdata->dai[0].ops = &p1022_ds_ops;
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/* Determine the codec name, it will be used as the codec DAI name */
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ret = codec_node_dev_name(codec_np, mdata->codec_name, DAI_NAME_SIZE);
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if (ret) {
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dev_err(&pdev->dev, "invalid codec node %s\n",
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codec_np->full_name);
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ret = -EINVAL;
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goto error;
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}
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mdata->dai[0].codec_name = mdata->codec_name;
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/* We register two DAIs per SSI, one for playback and the other for
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* capture. We support codecs that have separate DAIs for both playback
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* and capture.
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*/
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memcpy(&mdata->dai[1], &mdata->dai[0], sizeof(struct snd_soc_dai_link));
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|
||||
/* The DAI names from the codec (snd_soc_dai_driver.name) */
|
||||
mdata->dai[0].codec_dai_name = "wm8776-hifi-playback";
|
||||
mdata->dai[1].codec_dai_name = "wm8776-hifi-capture";
|
||||
|
||||
/* Get the device ID */
|
||||
iprop = of_get_property(np, "cell-index", NULL);
|
||||
if (!iprop) {
|
||||
dev_err(&pdev->dev, "cell-index property not found\n");
|
||||
ret = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
mdata->ssi_id = *iprop;
|
||||
|
||||
/* Get the serial format and clock direction. */
|
||||
sprop = of_get_property(np, "fsl,mode", NULL);
|
||||
if (!sprop) {
|
||||
dev_err(&pdev->dev, "fsl,mode property not found\n");
|
||||
ret = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (strcasecmp(sprop, "i2s-slave") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_I2S;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
|
||||
|
||||
/* In i2s-slave mode, the codec has its own clock source, so we
|
||||
* need to get the frequency from the device tree and pass it to
|
||||
* the codec driver.
|
||||
*/
|
||||
iprop = of_get_property(codec_np, "clock-frequency", NULL);
|
||||
if (!iprop || !*iprop) {
|
||||
dev_err(&pdev->dev, "codec bus-frequency "
|
||||
"property is missing or invalid\n");
|
||||
ret = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
mdata->clk_frequency = *iprop;
|
||||
} else if (strcasecmp(sprop, "i2s-master") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_I2S;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
} else if (strcasecmp(sprop, "lj-slave") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_LEFT_J;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
|
||||
} else if (strcasecmp(sprop, "lj-master") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_LEFT_J;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
} else if (strcasecmp(sprop, "rj-slave") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_RIGHT_J;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
|
||||
} else if (strcasecmp(sprop, "rj-master") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_RIGHT_J;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
} else if (strcasecmp(sprop, "ac97-slave") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_AC97;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
|
||||
} else if (strcasecmp(sprop, "ac97-master") == 0) {
|
||||
mdata->dai_format = SND_SOC_DAIFMT_AC97;
|
||||
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
|
||||
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
|
||||
} else {
|
||||
dev_err(&pdev->dev,
|
||||
"unrecognized fsl,mode property '%s'\n", sprop);
|
||||
ret = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (!mdata->clk_frequency) {
|
||||
dev_err(&pdev->dev, "unknown clock frequency\n");
|
||||
ret = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* Find the playback DMA channel to use. */
|
||||
mdata->dai[0].platform_name = mdata->platform_name[0];
|
||||
ret = get_dma_channel(np, "fsl,playback-dma", &mdata->dai[0],
|
||||
&mdata->dma_channel_id[0],
|
||||
&mdata->dma_id[0]);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* Find the capture DMA channel to use. */
|
||||
mdata->dai[1].platform_name = mdata->platform_name[1];
|
||||
ret = get_dma_channel(np, "fsl,capture-dma", &mdata->dai[1],
|
||||
&mdata->dma_channel_id[1],
|
||||
&mdata->dma_id[1]);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* Initialize our DAI data structure. */
|
||||
mdata->dai[0].stream_name = "playback";
|
||||
mdata->dai[1].stream_name = "capture";
|
||||
mdata->dai[0].name = mdata->dai[0].stream_name;
|
||||
mdata->dai[1].name = mdata->dai[1].stream_name;
|
||||
|
||||
mdata->card.probe = p1022_ds_machine_probe;
|
||||
mdata->card.remove = p1022_ds_machine_remove;
|
||||
mdata->card.name = pdev->name; /* The platform driver name */
|
||||
mdata->card.num_links = 2;
|
||||
mdata->card.dai_link = mdata->dai;
|
||||
|
||||
/* Allocate a new audio platform device structure */
|
||||
sound_device = platform_device_alloc("soc-audio", -1);
|
||||
if (!sound_device) {
|
||||
dev_err(&pdev->dev, "platform device alloc failed\n");
|
||||
ret = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* Associate the card data with the sound device */
|
||||
platform_set_drvdata(sound_device, &mdata->card);
|
||||
|
||||
/* Register with ASoC */
|
||||
ret = platform_device_add(sound_device);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "platform device add failed\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
of_node_put(codec_np);
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
of_node_put(codec_np);
|
||||
|
||||
if (sound_device)
|
||||
platform_device_unregister(sound_device);
|
||||
|
||||
kfree(mdata);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* p1022_ds_remove: remove the platform device
|
||||
*
|
||||
* This function is called when the platform device is removed.
|
||||
*/
|
||||
static int __devexit p1022_ds_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct platform_device *sound_device = dev_get_drvdata(&pdev->dev);
|
||||
struct snd_soc_card *card = platform_get_drvdata(sound_device);
|
||||
struct machine_data *mdata =
|
||||
container_of(card, struct machine_data, card);
|
||||
|
||||
platform_device_unregister(sound_device);
|
||||
|
||||
kfree(mdata);
|
||||
sound_device->dev.platform_data = NULL;
|
||||
|
||||
dev_set_drvdata(&pdev->dev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver p1022_ds_driver = {
|
||||
.probe = p1022_ds_probe,
|
||||
.remove = __devexit_p(p1022_ds_remove),
|
||||
.driver = {
|
||||
/* The name must match the 'model' property in the device tree,
|
||||
* in lowercase letters, but only the part after that last
|
||||
* comma. This is because some model properties have a "fsl,"
|
||||
* prefix.
|
||||
*/
|
||||
.name = "snd-soc-p1022",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
/**
|
||||
* p1022_ds_init: machine driver initialization.
|
||||
*
|
||||
* This function is called when this module is loaded.
|
||||
*/
|
||||
static int __init p1022_ds_init(void)
|
||||
{
|
||||
struct device_node *guts_np;
|
||||
struct resource res;
|
||||
|
||||
pr_info("Freescale P1022 DS ALSA SoC machine driver\n");
|
||||
|
||||
/* Get the physical address of the global utilities registers */
|
||||
guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
|
||||
if (of_address_to_resource(guts_np, 0, &res)) {
|
||||
pr_err("p1022-ds: missing/invalid global utilities node\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
guts_phys = res.start;
|
||||
of_node_put(guts_np);
|
||||
|
||||
return platform_driver_register(&p1022_ds_driver);
|
||||
}
|
||||
|
||||
/**
|
||||
* p1022_ds_exit: machine driver exit
|
||||
*
|
||||
* This function is called when this driver is unloaded.
|
||||
*/
|
||||
static void __exit p1022_ds_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&p1022_ds_driver);
|
||||
}
|
||||
|
||||
module_init(p1022_ds_init);
|
||||
module_exit(p1022_ds_exit);
|
||||
|
||||
MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
|
||||
MODULE_DESCRIPTION("Freescale P1022 DS ALSA SoC machine driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue