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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-18 18:04:33 +0100 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-18 23:42:32 +0100 |
| commit | f07e572f6447465d8938679533d604e402b0f066 (patch) | |
| tree | cb333bd2a67e59e7c07659514850a0fd55fc825e /target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch | |
| parent | 5d3a6fd970619dfc55f8259035c3027d7613a2a6 (diff) | |
| download | upstream-f07e572f6447465d8938679533d604e402b0f066.tar.gz upstream-f07e572f6447465d8938679533d604e402b0f066.tar.bz2 upstream-f07e572f6447465d8938679533d604e402b0f066.zip | |
bcm27xx: import latest patches from the RPi foundation
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 <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0843-serial-8250-bcm2835aux-defer-if-clock-is-zero.patch | 28 |
1 files changed, 28 insertions, 0 deletions
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 <phil@raspberrypi.com> +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 <phil@raspberrypi.com> +--- + 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) { |