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path: root/target/linux/ar71xx/patches-4.4/521-MIPS-ath79-enable-UART-for-early_serial.patch
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Diffstat (limited to 'target/linux/ar71xx/patches-4.4/521-MIPS-ath79-enable-UART-for-early_serial.patch')
-rw-r--r--target/linux/ar71xx/patches-4.4/521-MIPS-ath79-enable-UART-for-early_serial.patch61
1 files changed, 61 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-4.4/521-MIPS-ath79-enable-UART-for-early_serial.patch b/target/linux/ar71xx/patches-4.4/521-MIPS-ath79-enable-UART-for-early_serial.patch
new file mode 100644
index 0000000..3d6ddfe
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.4/521-MIPS-ath79-enable-UART-for-early_serial.patch
@@ -0,0 +1,61 @@
+--- a/arch/mips/ath79/early_printk.c
++++ b/arch/mips/ath79/early_printk.c
+@@ -56,6 +56,46 @@ static void prom_putchar_dummy(unsigned
+ /* nothing to do */
+ }
+
++static void prom_enable_uart(u32 id)
++{
++ void __iomem *gpio_base;
++ u32 uart_en;
++ u32 t;
++
++ switch (id) {
++ case REV_ID_MAJOR_AR71XX:
++ uart_en = AR71XX_GPIO_FUNC_UART_EN;
++ break;
++
++ case REV_ID_MAJOR_AR7240:
++ case REV_ID_MAJOR_AR7241:
++ case REV_ID_MAJOR_AR7242:
++ uart_en = AR724X_GPIO_FUNC_UART_EN;
++ break;
++
++ case REV_ID_MAJOR_AR913X:
++ uart_en = AR913X_GPIO_FUNC_UART_EN;
++ break;
++
++ case REV_ID_MAJOR_AR9330:
++ case REV_ID_MAJOR_AR9331:
++ uart_en = AR933X_GPIO_FUNC_UART_EN;
++ break;
++
++ case REV_ID_MAJOR_AR9341:
++ case REV_ID_MAJOR_AR9342:
++ case REV_ID_MAJOR_AR9344:
++ /* TODO */
++ default:
++ return;
++ }
++
++ gpio_base = (void __iomem *)(KSEG1ADDR(AR71XX_GPIO_BASE));
++ t = __raw_readl(gpio_base + AR71XX_GPIO_REG_FUNC);
++ t |= uart_en;
++ __raw_writel(t, gpio_base + AR71XX_GPIO_REG_FUNC);
++}
++
+ static void prom_putchar_init(void)
+ {
+ void __iomem *base;
+@@ -86,8 +126,10 @@ static void prom_putchar_init(void)
+
+ default:
+ _prom_putchar = prom_putchar_dummy;
+- break;
++ return;
+ }
++
++ prom_enable_uart(id);
+ }
+
+ void prom_putchar(unsigned char ch)