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MIPS: ath79: enable uart during early_prink
This patch ensures, that the pinmux register is properly setup for the boot console UART when early_printk is enabled. [paul.burton@mips.com: - s/poinmux/pinmux/ - s/uart/UART/ - Drop extraneous parentheses.] Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: John Crispin <john@phrozen.org> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org
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1 changed files with 43 additions and 1 deletions
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@ -60,6 +60,46 @@ static void prom_putchar_dummy(char ch)
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/* nothing to do */
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}
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static void prom_enable_uart(u32 id)
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{
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void __iomem *gpio_base;
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u32 uart_en;
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u32 t;
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switch (id) {
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case REV_ID_MAJOR_AR71XX:
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uart_en = AR71XX_GPIO_FUNC_UART_EN;
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break;
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case REV_ID_MAJOR_AR7240:
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case REV_ID_MAJOR_AR7241:
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case REV_ID_MAJOR_AR7242:
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uart_en = AR724X_GPIO_FUNC_UART_EN;
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break;
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case REV_ID_MAJOR_AR913X:
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uart_en = AR913X_GPIO_FUNC_UART_EN;
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break;
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case REV_ID_MAJOR_AR9330:
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case REV_ID_MAJOR_AR9331:
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uart_en = AR933X_GPIO_FUNC_UART_EN;
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break;
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case REV_ID_MAJOR_AR9341:
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case REV_ID_MAJOR_AR9342:
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case REV_ID_MAJOR_AR9344:
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/* TODO */
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default:
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return;
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}
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gpio_base = (void __iomem *)KSEG1ADDR(AR71XX_GPIO_BASE);
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t = __raw_readl(gpio_base + AR71XX_GPIO_REG_FUNC);
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t |= uart_en;
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__raw_writel(t, gpio_base + AR71XX_GPIO_REG_FUNC);
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}
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static void prom_putchar_init(void)
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{
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void __iomem *base;
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@ -94,8 +134,10 @@ static void prom_putchar_init(void)
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default:
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_prom_putchar = prom_putchar_dummy;
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break;
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return;
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}
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prom_enable_uart(id);
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}
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void prom_putchar(char ch)
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