From b871424f57076b33e7342d654b93951c6e8d8f29 Mon Sep 17 00:00:00 2001 From: Songjun Wu Date: Tue, 16 Oct 2018 17:19:04 +0800 Subject: serial: lantiq: Get serial id from dts Get serial id from dts, also keep backward compatible when dts is not updated. Signed-off-by: Songjun Wu Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/lantiq.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) (limited to 'drivers/tty/serial/lantiq.c') diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c index 044128277248..66c671677761 100644 --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -688,7 +688,7 @@ lqasc_probe(struct platform_device *pdev) struct ltq_uart_port *ltq_port; struct uart_port *port; struct resource *mmres, irqres[3]; - int line = 0; + int line; int ret; mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -699,9 +699,20 @@ lqasc_probe(struct platform_device *pdev) return -ENODEV; } - /* check if this is the console port */ - if (mmres->start != CPHYSADDR(LTQ_EARLY_ASC)) - line = 1; + /* get serial id */ + line = of_alias_get_id(node, "serial"); + if (line < 0) { + if (IS_ENABLED(CONFIG_LANTIQ)) { + if (mmres->start == CPHYSADDR(LTQ_EARLY_ASC)) + line = 0; + else + line = 1; + } else { + dev_err(&pdev->dev, "failed to get alias id, errno %d\n", + line); + return line; + } + } if (lqasc_port[line]) { dev_err(&pdev->dev, "port %d already allocated\n", line); -- cgit v1.2.3-55-g7522