From f07e572f6447465d8938679533d604e402b0f066 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Thu, 18 Feb 2021 18:04:33 +0100 Subject: bcm27xx: import latest patches from the RPi foundation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G bcm2710: boot tested on RPi 3B v1.2 bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas --- ...al-8250-bcm2835aux-defer-if-clock-is-zero.patch | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch (limited to 'target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch') diff --git a/target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch b/target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch new file mode 100644 index 0000000000..b421ba9cdc --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch @@ -0,0 +1,28 @@ +From 80163961af8e31a2045271c5a12adaae620445e1 Mon Sep 17 00:00:00 2001 +From: Phil Elwell +Date: Thu, 2 Jul 2020 13:53:20 +0100 +Subject: [PATCH] serial: 8250: bcm2835aux - defer if clock is zero + +See: https://github.com/raspberrypi/linux/issues/3700 + +Signed-off-by: Phil Elwell +--- + drivers/tty/serial/8250/8250_bcm2835aux.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +--- a/drivers/tty/serial/8250/8250_bcm2835aux.c ++++ b/drivers/tty/serial/8250/8250_bcm2835aux.c +@@ -92,6 +92,13 @@ static int bcm2835aux_serial_probe(struc + */ + data->uart.port.uartclk = clk_get_rate(data->clk) * 2; + ++ /* The clock is only queried at probe time, which means we get one shot ++ * at this. A zero clock is never going to work and is almost certainly ++ * due to a parent not being ready, so prefer to defer. ++ */ ++ if (!data->uart.port.uartclk) ++ return -EPROBE_DEFER; ++ + /* register the port */ + ret = serial8250_register_8250_port(&data->uart); + if (ret < 0) { -- cgit v1.2.3