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patch-ns16550-add-support-for-Intel-LPSS-UART.patch
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patch-ns16550-add-support-for-Intel-LPSS-UART.patch
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From 46d5cec7e03d01a480ffdb6a50a576c7fe503df0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
Date: Tue, 15 Mar 2022 12:09:01 +0100
Subject: [PATCH] ns16550: add support for Intel LPSS UART
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This adds support for serial console as found in a laptop with TGL-LP
(StarBook MkV). Since the device is on the bus 0, it needs to be enabled
via "com1=...,amt", not just "...,pci".
Device specification is in Intel docs 631119-007 and 631120-001.
Signed-off-by: Marek Marczykowski-Górecki <[email protected]>
Reviewed-by: Jan Beulich <[email protected]>
---
xen/drivers/char/ns16550.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/xen/drivers/char/ns16550.c b/xen/drivers/char/ns16550.c
index e5b4a9085516..fb75cee4a13a 100644
--- a/xen/drivers/char/ns16550.c
+++ b/xen/drivers/char/ns16550.c
@@ -91,6 +91,7 @@ struct ns16550_config {
param_exar_xr17v352,
param_exar_xr17v354,
param_exar_xr17v358,
+ param_intel_lpss,
} param;
};
@@ -822,6 +823,16 @@ static const struct ns16550_config_param __initconst uart_param[] = {
.mmio = 1,
.max_ports = 8,
},
+ [param_intel_lpss] = {
+ .uart_offset = 0x000,
+ .reg_shift = 2,
+ .reg_width = 1,
+ .fifo_size = 64,
+ .lsr_mask = UART_LSR_THRE,
+ .bar0 = 1,
+ .mmio = 1,
+ .max_ports = 1,
+ },
};
static const struct ns16550_config __initconst uart_config[] =
{
@@ -1066,6 +1077,12 @@ static const struct ns16550_config __initconst uart_config[] =
.dev_id = 0x0358,
.param = param_exar_xr17v358
},
+ /* Intel Corp. TGL-LP LPSS PCI */
+ {
+ .vendor_id = PCI_VENDOR_ID_INTEL,
+ .dev_id = 0xa0c7,
+ .param = param_intel_lpss
+ },
};
#endif
--
2.35.3