msm: sdio_mux: Return -ENODEV if SDIO_MUX is not compiled-in
Define SDIO_MUX APIs, returning -ENODEV, if kernel is built
without SDIO MUX support. This allows client drivers to
call SDIO MUX APIs without checking for its support.
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
diff --git a/arch/arm/mach-msm/include/mach/sdio_dmux.h b/arch/arm/mach-msm/include/mach/sdio_dmux.h
index 8ec31bb..afc1b11 100644
--- a/arch/arm/mach-msm/include/mach/sdio_dmux.h
+++ b/arch/arm/mach-msm/include/mach/sdio_dmux.h
@@ -16,6 +16,7 @@
#ifndef _SDIO_DMUX_H
#define _SDIO_DMUX_H
+#ifdef CONFIG_MSM_SDIO_DMUX
enum {
SDIO_DMUX_DATA_RMNET_0,
SDIO_DMUX_DATA_RMNET_1,
@@ -43,4 +44,40 @@
int msm_sdio_dmux_is_ch_low(uint32_t id);
+#else
+
+static int __maybe_unused msm_sdio_dmux_open(uint32_t id, void *priv,
+ void (*receive_cb)(void *, struct sk_buff *),
+ void (*write_done)(void *, struct sk_buff *))
+{
+ return -ENODEV;
+}
+
+static int __maybe_unused msm_sdio_is_channel_in_reset(uint32_t id)
+{
+ return -ENODEV;
+}
+
+static int __maybe_unused msm_sdio_dmux_close(uint32_t id)
+{
+ return -ENODEV;
+}
+
+static int __maybe_unused msm_sdio_dmux_write(uint32_t id, struct sk_buff *skb)
+{
+ return -ENODEV;
+}
+
+static int __maybe_unused msm_sdio_dmux_is_ch_full(uint32_t id)
+{
+ return -ENODEV;
+}
+
+static int __maybe_unused msm_sdio_dmux_is_ch_low(uint32_t id)
+{
+ return -ENODEV;
+}
+
+#endif
+
#endif /* _SDIO_DMUX_H */