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Subjectmulti-card support for arizona-core
Hi!

Add support for than one arizona. We introduce codec_num and fill it
based on device tree. If there's better way, let me know. (For v4.2,
but I believe nothing changed there. And yes, I'd need to document the
dt binding. Will do if the rest of patch is ok.)

Signed-off-by: Pavel Machek <pavel@denx.de>

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index a72ddb2..4f9dbd8 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -755,7 +755,15 @@ static int arizona_of_get_core_pdata(struct arizona *arizona)
int ret, i;
int count = 0;

+ ret = of_property_read_u32(arizona->dev->of_node,
+ "wlf,codec-number", &arizona->pdata.codec_num);
+ if (ret < 0) {
+ dev_info(arizona->dev, "No codec-number property in DT => single-codec mode\n");
+ arizona->pdata.codec_num = -1;
+ } else {
+ dev_info(arizona->dev, "codec-number from DT: %d\n", arizona->pdata.codec_num);
+ }

ret = of_property_read_u32_array(arizona->dev->of_node,
"wlf,gpio-defaults",
arizona->pdata.gpio_defaults,
@@ -925,7 +952,7 @@ int arizona_dev_init(struct arizona *arizona)
/* Mark DCVDD as external, LDO1 driver will clear if internal */
arizona->external_dcvdd = true;

- ret = mfd_add_devices(arizona->dev, -1, early_devs,
+ ret = mfd_add_devices(arizona->dev, arizona->pdata.codec_num, early_devs,
ARRAY_SIZE(early_devs), NULL, 0, NULL);
if (ret != 0) {
dev_err(dev, "Failed to add early children: %d\n", ret);
@@ -1259,9 +1286,12 @@ int arizona_dev_init(struct arizona *arizona)
arizona_request_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, "Underclocked",
arizona_underclocked, arizona);

+ // FIXME: multiple codec handling only added for WM5102
switch (arizona->type) {
case WM5102:
- ret = mfd_add_devices(arizona->dev, -1, wm5102_devs,
+ printk("arizona: wm5102, working with device %d\n", arizona->pdata.codec_num);
+
+ ret = mfd_add_devices(arizona->dev, arizona->pdata.codec_num, wm5102_devs,
ARRAY_SIZE(wm5102_devs), NULL, 0, NULL);
break;
case WM5110:
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index 43db4fa..b36a750 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -75,6 +75,8 @@ struct arizona_micd_range {
};

struct arizona_pdata {
+ int codec_num; // -1: n/a (=> single codec only) ; 1 or 2: codec #1 or #2 (=> two codecs)
+
int reset; /** GPIO controlling /RESET, if any */
int ldoena; /** GPIO controlling LODENA, if any */

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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