The SBSA UART has a fixed baud rate and flow control setting, which
cannot be changed or queried by software.
Add a vendor specific property to always return fixed values when
trying to read the console options.
Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
drivers/tty/serial/amba-pl011.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 70af210..12f1a5f 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -79,6 +79,7 @@ struct vendor_data {
bool dma_threshold;
bool cts_event_workaround;
bool always_enabled;
+ char *fixed_options;
unsigned int (*get_fifosize)(struct amba_device *dev);
};
@@ -96,6 +97,7 @@ static struct vendor_data vendor_arm = {
.dma_threshold = false,
.cts_event_workaround = false,
.always_enabled = false,
+ .fixed_options = NULL,
.get_fifosize = get_fifosize_arm,
};
@@ -112,6 +114,7 @@ static struct vendor_data vendor_st = {
.dma_threshold = true,
.cts_event_workaround = true,
.always_enabled = false,
+ .fixed_options = NULL,
.get_fifosize = get_fifosize_st,
};
@@ -2062,6 +2065,9 @@ static int __init pl011_console_setup(struct console *co, char *options)
uap->port.uartclk = clk_get_rate(uap->clk);
+ if (!options && uap->vendor->fixed_options)
+ options = uap->vendor->fixed_options;
+
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
else
--
1.7.9.5
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