[xen master] xen/arm: pl011: Add SBSA UART device-tree support

[patchbot@xxxxxxx]

commit 42473bae2394b6602372ab8b83a9ca294b1e40f4
Author:     Michal Orzel <michal.orzel@xxxxxxx>
AuthorDate: Wed Jun 7 11:27:27 2023 +0200
Commit:     Stefano Stabellini <stefano.stabellini@xxxxxxx>
CommitDate: Mon Jun 19 12:20:59 2023 -0700

    xen/arm: pl011: Add SBSA UART device-tree support
    
    We already have all the bits necessary in PL011 driver to support SBSA
    UART thanks to commit 032ea8c736d10f02672863c6e369338f948f7ed8 that
    enabled it for ACPI. Plumb in the remaining part for device-tree boot:
     - add arm,sbsa-uart compatible to pl011_dt_match (no need for a separate
       struct and DT_DEVICE_START as SBSA is a subset of PL011),
     - from pl011_dt_uart_init(), check for SBSA UART compatible to determine
       the UART type in use.
    
    Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
    Reviewed-by: Henry Wang <Henry.Wang@xxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Tested-by: Henry Wang <Henry.Wang@xxxxxxx>
---
 xen/drivers/char/pl011.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/xen/drivers/char/pl011.c b/xen/drivers/char/pl011.c
index 403b1ac065..f7bf3ad117 100644
--- a/xen/drivers/char/pl011.c
+++ b/xen/drivers/char/pl011.c
@@ -286,7 +286,7 @@ static int __init pl011_dt_uart_init(struct dt_device_node 
*dev,
     int res;
     paddr_t addr, size;
     uint32_t io_width;
-    bool mmio32 = false;
+    bool mmio32 = false, sbsa;
 
     if ( strcmp(config, "") )
     {
@@ -320,7 +320,9 @@ static int __init pl011_dt_uart_init(struct dt_device_node 
*dev,
         }
     }
 
-    res = pl011_uart_init(res, addr, size, false, mmio32);
+    sbsa = dt_device_is_compatible(dev, "arm,sbsa-uart");
+
+    res = pl011_uart_init(res, addr, size, sbsa, mmio32);
     if ( res < 0 )
     {
         printk("pl011: Unable to initialize\n");
@@ -335,6 +337,8 @@ static int __init pl011_dt_uart_init(struct dt_device_node 
*dev,
 static const struct dt_device_match pl011_dt_match[] __initconst =
 {
     DT_MATCH_COMPATIBLE("arm,pl011"),
+    /* No need for a separate struct as SBSA UART is a subset of PL011 */
+    DT_MATCH_COMPATIBLE("arm,sbsa-uart"),
     { /* sentinel */ },
 };
 
--
generated by git-patchbot for /home/xen/git/xen.git#master