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domenico
2025-06-24 14:35:53 +02:00
commit c06fb25d1f
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34
package/boot/uboot-d1/patches/0021-serial-ns16550-Enable-clocks-during-probe.patch Normal file
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@@ -0,0 +1,34 @@
From 8fde85b609273f8389178d4c0d066390a0e0773d Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
Date: Sun, 30 Oct 2022 14:56:10 -0500
Subject: [PATCH 21/90] serial: ns16550: Enable clocks during probe
If the UART bus or baud clock has a gate, it must be enabled before the
UART can be used.
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
drivers/serial/ns16550.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -506,6 +506,7 @@ int ns16550_serial_probe(struct udevice
struct ns16550_plat *plat = dev_get_plat(dev);
struct ns16550 *const com_port = dev_get_priv(dev);
struct reset_ctl_bulk reset_bulk;
+ struct clk_bulk clk_bulk;
fdt_addr_t addr;
int ret;
@@ -524,6 +525,10 @@ int ns16550_serial_probe(struct udevice
if (!ret)
reset_deassert_bulk(&reset_bulk);
+ ret = clk_get_bulk(dev, &clk_bulk);
+ if (!ret)
+ clk_enable_bulk(&clk_bulk);
+
com_port->plat = dev_get_plat(dev);
ns16550_init(com_port, -1);