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>
diff --git a/Documentation/devicetree/bindings/sound/renesas,fsi.txt b/Documentation/devicetree/bindings/sound/renesas,fsi.txt
new file mode 100644
index 0000000..c5be003
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/renesas,fsi.txt
@@ -0,0 +1,26 @@
+Renesas FSI
+
+Required properties:
+- compatible : "renesas,sh_fsi2" or "renesas,sh_fsi"
+- reg : Should contain the register physical address and length
+- interrupts : Should contain FSI interrupt
+
+- fsia,spdif-connection : FSI is connected by S/PDFI
+- fsia,stream-mode-support : FSI supports 16bit stream mode.
+- fsia,use-internal-clock : FSI uses internal clock when master mode.
+
+- fsib,spdif-connection : same as fsia
+- fsib,stream-mode-support : same as fsia
+- fsib,use-internal-clock : same as fsia
+
+Example:
+
+sh_fsi2: sh_fsi2@0xec230000 {
+ compatible = "renesas,sh_fsi2";
+ reg = <0xec230000 0x400>;
+ interrupts = <0 146 0x4>;
+
+ fsia,spdif-connection;
+ fsia,stream-mode-support;
+ fsia,use-internal-clock;
+};
diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c
index ef34ef8..9157612 100644
--- a/sound/soc/sh/fsi.c
+++ b/sound/soc/sh/fsi.c
@@ -16,6 +16,8 @@
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/scatterlist.h>
#include <linux/sh_dma.h>
#include <linux/slab.h>
@@ -297,7 +299,7 @@
int irq;
struct fsi_priv fsia;
struct fsi_priv fsib;
- struct fsi_core *core;
+ const struct fsi_core *core;
spinlock_t lock;
};
@@ -1887,6 +1889,33 @@
/*
* platform function
*/
+static void fsi_of_parse(char *name,
+ struct device_node *np,
+ struct sh_fsi_port_info *info,
+ struct device *dev)
+{
+ int i;
+ char prop[128];
+ unsigned long flags = 0;
+ struct {
+ char *name;
+ unsigned int val;
+ } of_parse_property[] = {
+ { "spdif-connection", SH_FSI_FMT_SPDIF },
+ { "stream-mode-support", SH_FSI_ENABLE_STREAM_MODE },
+ { "use-internal-clock", SH_FSI_CLK_CPG },
+ };
+
+ for (i = 0; i < ARRAY_SIZE(of_parse_property); i++) {
+ sprintf(prop, "%s,%s", name, of_parse_property[i].name);
+ if (of_get_property(np, prop, NULL))
+ flags |= of_parse_property[i].val;
+ }
+ info->flags = flags;
+
+ dev_dbg(dev, "%s flags : %lx\n", name, info->flags);
+}
+
static void fsi_port_info_init(struct fsi_priv *fsi,
struct sh_fsi_port_info *info)
{
@@ -1914,22 +1943,40 @@
}
}
+static struct of_device_id fsi_of_match[];
static int fsi_probe(struct platform_device *pdev)
{
struct fsi_master *master;
- const struct platform_device_id *id_entry;
+ struct device_node *np = pdev->dev.of_node;
struct sh_fsi_platform_info info;
+ const struct fsi_core *core;
struct fsi_priv *fsi;
struct resource *res;
unsigned int irq;
int ret;
memset(&info, 0, sizeof(info));
- if (pdev->dev.platform_data)
- memcpy(&info, pdev->dev.platform_data, sizeof(info));
- id_entry = pdev->id_entry;
- if (!id_entry) {
+ core = NULL;
+ if (np) {
+ const struct of_device_id *of_id;
+
+ of_id = of_match_device(fsi_of_match, &pdev->dev);
+ if (of_id) {
+ core = of_id->data;
+ fsi_of_parse("fsia", np, &info.port_a, &pdev->dev);
+ fsi_of_parse("fsib", np, &info.port_b, &pdev->dev);
+ }
+ } else {
+ const struct platform_device_id *id_entry = pdev->id_entry;
+ if (id_entry)
+ core = (struct fsi_core *)id_entry->driver_data;
+
+ if (pdev->dev.platform_data)
+ memcpy(&info, pdev->dev.platform_data, sizeof(info));
+ }
+
+ if (!core) {
dev_err(&pdev->dev, "unknown fsi device\n");
return -ENODEV;
}
@@ -1956,7 +2003,7 @@
/* master setting */
master->irq = irq;
- master->core = (struct fsi_core *)id_entry->driver_data;
+ master->core = core;
spin_lock_init(&master->lock);
/* FSI A setting */
@@ -1987,7 +2034,7 @@
dev_set_drvdata(&pdev->dev, master);
ret = devm_request_irq(&pdev->dev, irq, &fsi_interrupt, 0,
- id_entry->name, master);
+ dev_name(&pdev->dev), master);
if (ret) {
dev_err(&pdev->dev, "irq request err\n");
goto exit_fsib;
@@ -2113,6 +2160,13 @@
.b_mclk = B_MST_CTLR,
};
+static struct of_device_id fsi_of_match[] __devinitconst = {
+ { .compatible = "renesas,sh_fsi", .data = &fsi1_core},
+ { .compatible = "renesas,sh_fsi2", .data = &fsi2_core},
+ {},
+};
+MODULE_DEVICE_TABLE(of, fsi_of_match);
+
static struct platform_device_id fsi_id_table[] = {
{ "sh_fsi", (kernel_ulong_t)&fsi1_core },
{ "sh_fsi2", (kernel_ulong_t)&fsi2_core },
@@ -2124,6 +2178,7 @@
.driver = {
.name = "fsi-pcm-audio",
.pm = &fsi_pm_ops,
+ .of_match_table = fsi_of_match,
},
.probe = fsi_probe,
.remove = fsi_remove,