linux-kernel - [PATCH -next] staging: pi433: depends on SPI

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Date:   Wed, 19 Jul 2017 16:58:28 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     LKML <linux-kernel@...r.kernel.org>, devel@...uxdriverproject.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Marcus Wolf <linux@...f-entwicklungen.de>
Subject: [PATCH -next] staging: pi433: depends on SPI

From: Randy Dunlap <rdunlap@...radead.org>

The pi433 driver uses SPI interfaces so it should depend on SPI.
Also, the "default n" can be removed since that is already the
default.

Fixes these build errors when SPI is not enabled:

drivers/staging/pi433/pi433_if.o: In function `pi433_probe':
pi433_if.c:(.text+0x1135): undefined reference to `spi_setup'
pi433_if.c:(.text+0x1177): undefined reference to `spi_write_then_read'
drivers/staging/pi433/pi433_if.o: In function `pi433_init':
pi433_if.c:(.init.text+0xb8): undefined reference to `__spi_register_driver'
drivers/staging/pi433/rf69.o: In function `rf69_read_fifo':
rf69.c:(.text+0x102): undefined reference to `spi_sync'
drivers/staging/pi433/rf69.o: In function `rf69_write_fifo':
rf69.c:(.text+0x248): undefined reference to `spi_sync'
drivers/staging/pi433/rf69.o: In function `rf69_read_reg':
rf69.c:(.text+0x290): undefined reference to `spi_write_then_read'
drivers/staging/pi433/rf69.o: In function `rf69_write_reg':
rf69.c:(.text+0x523): undefined reference to `spi_sync'

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Marcus Wolf <linux@...f-entwicklungen.de>
---
 drivers/staging/pi433/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- next-2017-0719.orig/drivers/staging/pi433/Kconfig
+++ next-2017-0719/drivers/staging/pi433/Kconfig
@@ -1,6 +1,6 @@
 config PI433
         tristate "Pi433 - a 433MHz radio module for Raspberry Pi"
-        default n
+        depends on SPI
         ---help---
           This option allows you to enable support for the radio module Pi433.