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- 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)
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