net: wireless: ti: wl1251 add device tree support

We will have the wl1251 defined as a child node of the mmc interface
and can read setup for gpios, interrupts and the ti,use-eeprom
property from there instead of pdata to be provided by pdata-quirks.

Fixes: 81eef6ca9201 ("mmc: omap_hsmmc: Use dma_request_chan() for requesting DMA channel")
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Cc: <stable@vger.kernel.org> # v4.7+
[Ulf: Fixed up some complaints from checkpatch]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/net/wireless/ti/wl1251/sdio.c b/drivers/net/wireless/ti/wl1251/sdio.c
index 677f114..f1224b9 100644 (file)
--- a/drivers/net/wireless/ti/wl1251/sdio.c
+++ b/drivers/net/wireless/ti/wl1251/sdio.c
@@ -16,6 +16,9 @@
 #include <linux/irq.h>
 #include <linux/pm_runtime.h>
 #include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_irq.h>
 
 #include "wl1251.h"
 
@@ -217,6 +220,7 @@ static int wl1251_sdio_probe(struct sdio_func *func,
        struct ieee80211_hw *hw;
        struct wl1251_sdio *wl_sdio;
        const struct wl1251_platform_data *wl1251_board_data;
+       struct device_node *np = func->dev.of_node;
 
        hw = wl1251_alloc_hw();
        if (IS_ERR(hw))
@@ -248,6 +252,17 @@ static int wl1251_sdio_probe(struct sdio_func *func,
                wl->power_gpio = wl1251_board_data->power_gpio;
                wl->irq = wl1251_board_data->irq;
                wl->use_eeprom = wl1251_board_data->use_eeprom;
+       } else if (np) {
+               wl->use_eeprom = of_property_read_bool(np,
+                                                      "ti,wl1251-has-eeprom");
+               wl->power_gpio = of_get_named_gpio(np, "ti,power-gpio", 0);
+               wl->irq = of_irq_get(np, 0);
+
+               if (wl->power_gpio == -EPROBE_DEFER ||
+                   wl->irq == -EPROBE_DEFER) {
+                       ret = -EPROBE_DEFER;
+                       goto disable;
+               }
        }
 
        if (gpio_is_valid(wl->power_gpio)) {