adm8668: add 3.18 support

[openwrt/openwrt.git] / target / linux / adm8668 / files-3.18 / arch / mips / adm8668 / early_printk.c

diff --git a/target/linux/adm8668/files-3.18/arch/mips/adm8668/early_printk.c b/target/linux/adm8668/files-3.18/arch/mips/adm8668/early_printk.c
new file mode 100644 (file)
index 0000000..03dd72a
--- /dev/null
+++ b/target/linux/adm8668/files-3.18/arch/mips/adm8668/early_printk.c
@@ -0,0 +1,16 @@
+#include <linux/io.h>
+#include <linux/amba/serial.h>
+#include <adm8668.h>
+
+#define UART_READ(r) \
+       __raw_readl((void __iomem *)(KSEG1ADDR(ADM8668_UART0_BASE) + (r)))
+
+#define UART_WRITE(v, r) \
+       __raw_writel((v), (void __iomem *)(KSEG1ADDR(ADM8668_UART0_BASE) + (r)))
+
+void prom_putchar(char c)
+{
+       UART_WRITE(c, UART01x_DR);
+       while ((UART_READ(UART01x_FR) & UART01x_FR_TXFF) != 0)
+               ;
+}