From e95d949879bf632a5fa82c9a1c5607b40388484e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= Date: Sat, 15 Aug 2015 20:50:02 +0200 Subject: [PATCH] bcm2835: Add support for uart1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is a hack until a proper solution is agreed upon. Martin Sperl is doing some work in this area. Signed-off-by: Noralf Trønnes --- arch/arm/mach-bcm/board_bcm2835.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) --- a/arch/arm/mach-bcm/board_bcm2835.c +++ b/arch/arm/mach-bcm/board_bcm2835.c @@ -22,6 +22,29 @@ #include #include +/* Use this hack until a proper solution is agreed upon */ +static void __init bcm2835_init_uart1(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-aux-uart"); + if (of_device_is_available(np)) { + np = of_find_compatible_node(NULL, NULL, + "bcrm,bcm2835-aux-enable"); + if (np) { + void __iomem *base = of_iomap(np, 0); + + if (!base) { + pr_err("bcm2835: Failed enabling Mini UART\n"); + return; + } + + writel(1, base); + pr_info("bcm2835: Mini UART enabled\n"); + } + } +} + static void __init bcm2835_init(void) { struct device_node *np = of_find_node_by_path("/system"); @@ -42,6 +65,8 @@ static void __init bcm2835_init(void) system_rev = val; if (!of_property_read_u64(np, "linux,serial", &val64)) system_serial_low = val64; + + bcm2835_init_uart1(); } static const char * const bcm2835_compat[] = {