Initial commit

target/linux/ath79/patches-4.14/0015-MIPS-ath79-enable-uart-during-early_prink.patch

@@ -0,0 +1,75 @@
+From f55a400f4a691f3750eaf7bfcd6ecbf7ed1622f0 Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <juhosg@openwrt.org>
+Date: Mon, 5 Mar 2018 11:38:21 +0100
+Subject: [PATCH 15/33] MIPS: ath79: enable uart during early_prink
+
+This patch ensures, that the poinmux register is properly setup for the
+boot console uart when early_printk is enabled.
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Signed-off-by: John Crispin <john@phrozen.org>
+---
+ arch/mips/ath79/early_printk.c | 44 +++++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 43 insertions(+), 1 deletion(-)
+
+--- a/arch/mips/ath79/early_printk.c
++++ b/arch/mips/ath79/early_printk.c
+@@ -58,6 +58,46 @@ 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;
+@@ -92,8 +132,10 @@ static void prom_putchar_init(void)
+ 
+ 	default:
+ 		_prom_putchar = prom_putchar_dummy;
+-		break;
++		return;
+ 	}
++
++	prom_enable_uart(id);
+ }
+ 
+ void prom_putchar(unsigned char ch)