brcmfmac: add device tree support for SDIO devices

brcmfmac devices can use an out-of-band interrupt on a GPIO line.
Currently this is specified using platform data. Add support for
specifying out-of-band interrupt via device tree.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
[arend@broadcom.com: conditionalize more of-code, use driver debug routines]
Signed-off-by: Arend van Spriel <arend@broadcom.com>
[hdegoede@redhat.com: drop clk / reg_on gpio handling, as there is no consensus
 on how to handle this yet]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/Makefile

@@ -46,3 +46,5 @@ brcmfmac-$(CONFIG_BRCMDBG) += \
 		dhd_dbg.o
 brcmfmac-$(CONFIG_BRCM_TRACING) += \
 		tracepoint.o
+brcmfmac-$(CONFIG_OF) += \
+		of.o

drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c

@@ -42,6 +42,7 @@
 #include "dhd_bus.h"
 #include "dhd_dbg.h"
 #include "sdio_host.h"
+#include "of.h"
 
 #define SDIOH_API_ACCESS_RETRY_LIMIT	2
 
@@ -1044,6 +1045,9 @@ static int brcmf_ops_sdio_probe(struct sdio_func *func,
 	sdiodev->dev = &sdiodev->func[1]->dev;
 	sdiodev->pdata = brcmfmac_sdio_pdata;
 
+	if (!sdiodev->pdata)
+		brcmf_of_probe(sdiodev);
+
 	atomic_set(&sdiodev->suspend, false);
 	init_waitqueue_head(&sdiodev->request_word_wait);
 	init_waitqueue_head(&sdiodev->request_buffer_wait);

drivers/net/wireless/brcm80211/brcmfmac/of.c

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2014 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/mmc/card.h>
+#include <linux/platform_data/brcmfmac-sdio.h>
+#include <linux/mmc/sdio_func.h>
+
+#include <defs.h>
+#include "dhd_dbg.h"
+#include "sdio_host.h"
+
+void brcmf_of_probe(struct brcmf_sdio_dev *sdiodev)
+{
+	struct device *dev = sdiodev->dev;
+	struct device_node *np = dev->of_node;
+	int irq;
+	u32 irqf;
+	u32 val;
+
+	if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
+		return;
+
+	sdiodev->pdata = devm_kzalloc(dev, sizeof(*sdiodev->pdata), GFP_KERNEL);
+	if (!sdiodev->pdata)
+		return;
+
+	irq = irq_of_parse_and_map(np, 0);
+	if (irq < 0) {
+		brcmf_err("interrupt could not be mapped: err=%d\n", irq);
+		devm_kfree(dev, sdiodev->pdata);
+		return;
+	}
+	irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
+
+	sdiodev->pdata->oob_irq_supported = true;
+	sdiodev->pdata->oob_irq_nr = irq;
+	sdiodev->pdata->oob_irq_flags = irqf;
+
+	if (of_property_read_u32(np, "brcm,drive-strength", &val) == 0)
+		sdiodev->pdata->drive_strength = val;
+}

drivers/net/wireless/brcm80211/brcmfmac/of.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2014 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifdef CONFIG_OF
+void brcmf_of_probe(struct brcmf_sdio_dev *sdiodev);
+#else
+static void brcmf_of_probe(struct brcmf_sdio_dev *sdiodev)
+{
+}
+#endif /* CONFIG_OF */