forked from Minki/linux
ASoC: fsi: add device tree support
Support for loading the Renesas FSI driver via devicetree. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Kuninori Morimoto
Mark Brown
parent
fd974e52db
commit
9e7b6d60d8
26
Documentation/devicetree/bindings/sound/renesas,fsi.txt
Normal file
26
Documentation/devicetree/bindings/sound/renesas,fsi.txt
Normal file
@ -0,0 +1,26 @@
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Renesas FSI
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Required properties:
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- compatible : "renesas,sh_fsi2" or "renesas,sh_fsi"
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- reg : Should contain the register physical address and length
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- interrupts : Should contain FSI interrupt
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- fsia,spdif-connection : FSI is connected by S/PDFI
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- fsia,stream-mode-support : FSI supports 16bit stream mode.
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- fsia,use-internal-clock : FSI uses internal clock when master mode.
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- fsib,spdif-connection : same as fsia
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- fsib,stream-mode-support : same as fsia
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- fsib,use-internal-clock : same as fsia
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Example:
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sh_fsi2: sh_fsi2@0xec230000 {
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compatible = "renesas,sh_fsi2";
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reg = <0xec230000 0x400>;
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interrupts = <0 146 0x4>;
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fsia,spdif-connection;
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fsia,stream-mode-support;
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fsia,use-internal-clock;
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};
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@ -16,6 +16,8 @@
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#include <linux/dma-mapping.h>
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#include <linux/pm_runtime.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/scatterlist.h>
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#include <linux/sh_dma.h>
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#include <linux/slab.h>
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@ -297,7 +299,7 @@ struct fsi_master {
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int irq;
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struct fsi_priv fsia;
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struct fsi_priv fsib;
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struct fsi_core *core;
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const struct fsi_core *core;
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spinlock_t lock;
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};
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@ -1887,6 +1889,33 @@ static struct snd_soc_platform_driver fsi_soc_platform = {
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/*
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* platform function
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*/
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static void fsi_of_parse(char *name,
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struct device_node *np,
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struct sh_fsi_port_info *info,
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struct device *dev)
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{
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int i;
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char prop[128];
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unsigned long flags = 0;
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struct {
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char *name;
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unsigned int val;
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} of_parse_property[] = {
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{ "spdif-connection", SH_FSI_FMT_SPDIF },
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{ "stream-mode-support", SH_FSI_ENABLE_STREAM_MODE },
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{ "use-internal-clock", SH_FSI_CLK_CPG },
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};
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for (i = 0; i < ARRAY_SIZE(of_parse_property); i++) {
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sprintf(prop, "%s,%s", name, of_parse_property[i].name);
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if (of_get_property(np, prop, NULL))
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flags |= of_parse_property[i].val;
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}
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info->flags = flags;
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dev_dbg(dev, "%s flags : %lx\n", name, info->flags);
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}
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static void fsi_port_info_init(struct fsi_priv *fsi,
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struct sh_fsi_port_info *info)
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{
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@ -1914,22 +1943,40 @@ static void fsi_handler_init(struct fsi_priv *fsi,
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}
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}
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static struct of_device_id fsi_of_match[];
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static int fsi_probe(struct platform_device *pdev)
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{
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struct fsi_master *master;
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const struct platform_device_id *id_entry;
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struct device_node *np = pdev->dev.of_node;
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struct sh_fsi_platform_info info;
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const struct fsi_core *core;
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struct fsi_priv *fsi;
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struct resource *res;
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unsigned int irq;
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int ret;
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memset(&info, 0, sizeof(info));
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if (pdev->dev.platform_data)
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memcpy(&info, pdev->dev.platform_data, sizeof(info));
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id_entry = pdev->id_entry;
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if (!id_entry) {
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core = NULL;
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if (np) {
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const struct of_device_id *of_id;
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of_id = of_match_device(fsi_of_match, &pdev->dev);
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if (of_id) {
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core = of_id->data;
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fsi_of_parse("fsia", np, &info.port_a, &pdev->dev);
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fsi_of_parse("fsib", np, &info.port_b, &pdev->dev);
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}
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} else {
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const struct platform_device_id *id_entry = pdev->id_entry;
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if (id_entry)
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core = (struct fsi_core *)id_entry->driver_data;
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if (pdev->dev.platform_data)
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memcpy(&info, pdev->dev.platform_data, sizeof(info));
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}
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if (!core) {
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dev_err(&pdev->dev, "unknown fsi device\n");
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return -ENODEV;
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}
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@ -1956,7 +2003,7 @@ static int fsi_probe(struct platform_device *pdev)
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/* master setting */
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master->irq = irq;
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master->core = (struct fsi_core *)id_entry->driver_data;
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master->core = core;
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spin_lock_init(&master->lock);
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/* FSI A setting */
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@ -1987,7 +2034,7 @@ static int fsi_probe(struct platform_device *pdev)
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dev_set_drvdata(&pdev->dev, master);
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ret = devm_request_irq(&pdev->dev, irq, &fsi_interrupt, 0,
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id_entry->name, master);
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dev_name(&pdev->dev), master);
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if (ret) {
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dev_err(&pdev->dev, "irq request err\n");
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goto exit_fsib;
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@ -2113,6 +2160,13 @@ static struct fsi_core fsi2_core = {
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.b_mclk = B_MST_CTLR,
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};
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static struct of_device_id fsi_of_match[] __devinitconst = {
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{ .compatible = "renesas,sh_fsi", .data = &fsi1_core},
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{ .compatible = "renesas,sh_fsi2", .data = &fsi2_core},
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{},
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};
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MODULE_DEVICE_TABLE(of, fsi_of_match);
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static struct platform_device_id fsi_id_table[] = {
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{ "sh_fsi", (kernel_ulong_t)&fsi1_core },
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{ "sh_fsi2", (kernel_ulong_t)&fsi2_core },
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@ -2124,6 +2178,7 @@ static struct platform_driver fsi_driver = {
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.driver = {
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.name = "fsi-pcm-audio",
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.pm = &fsi_pm_ops,
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.of_match_table = fsi_of_match,
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},
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.probe = fsi_probe,
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.remove = fsi_remove,
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