ar71xx: Add kernel 4.9 support

This add support for kernel 4.9 to the ar71xx target.
It was compile tested with the generic, NAND and mikrotik subtarget.
Multiple members of the community tested it on their boards and did not
report any major problem so far.

Especially the NAND part received some changes to adapt to the new
kernel APIs. The serial driver hack used for the Arduino Yun was not
ported because the kernel changed there a lot.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/drivers/spi/spi-rb4xx-cpld.c b/target/linux/ar71xx/files/drivers/spi/spi-rb4xx-cpld.c
index 0534c7c..18af83b 100644
--- a/target/linux/ar71xx/files/drivers/spi/spi-rb4xx-cpld.c
+++ b/target/linux/ar71xx/files/drivers/spi/spi-rb4xx-cpld.c
@@ -21,6 +21,7 @@
 #include <linux/spi/spi.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
+#include <linux/version.h>
 
 #include <asm/mach-ath79/rb4xx_cpld.h>
 
@@ -246,7 +247,11 @@ static int rb4xx_cpld_gpio_init(struct rb4xx_cpld *cpld, unsigned int base)
 	cpld->chip.base = base;
 	cpld->chip.ngpio = CPLD_NUM_GPIOS;
 	cpld->chip.can_sleep = 1;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
 	cpld->chip.dev = &cpld->spi->dev;
+#else
+	cpld->chip.parent = &cpld->spi->dev;
+#endif
 	cpld->chip.owner = THIS_MODULE;
 
 	err = gpiochip_add(&cpld->chip);