From: Vladimir Zapolskiy <vz@mleia.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jirislaby@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: Lubomir Rintel <lkundrak@v3.sk>,
Piotr Wojtaszczyk <piotr.wojtaszczyk@timesys.com>,
devicetree@vger.kernel.org, linux-serial@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] arm: dts: lpc32xx: Add ns16550a compatible value to UART device tree nodes
Date: Sat, 10 Jan 2026 04:46:47 +0200 [thread overview]
Message-ID: <20260110024647.3389345-3-vz@mleia.com> (raw)
In-Reply-To: <20260110024647.3389345-1-vz@mleia.com>
NXP LPC32xx SoC has 4 16550A compatible UARTs with a difference of minor
significance, which is expectedly handled in the 8250 serial driver.
Reflect this fact in the platform device tree file by adding the expected
compatible value.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
---
arch/arm/boot/dts/nxp/lpc/lpc32xx.dtsi | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/arch/arm/boot/dts/nxp/lpc/lpc32xx.dtsi b/arch/arm/boot/dts/nxp/lpc/lpc32xx.dtsi
index e94df78def18..8fa1848943f8 100644
--- a/arch/arm/boot/dts/nxp/lpc/lpc32xx.dtsi
+++ b/arch/arm/boot/dts/nxp/lpc/lpc32xx.dtsi
@@ -263,8 +263,7 @@ i2s1: i2s@2009c000 {
/* UART5 first since it is the default console, ttyS0 */
uart5: serial@40090000 {
- /* actually, ns16550a w/ 64 byte fifos! */
- compatible = "nxp,lpc3220-uart";
+ compatible = "nxp,lpc3220-uart", "ns16550a";
reg = <0x40090000 0x1000>;
interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
reg-shift = <2>;
@@ -273,7 +272,7 @@ uart5: serial@40090000 {
};
uart3: serial@40080000 {
- compatible = "nxp,lpc3220-uart";
+ compatible = "nxp,lpc3220-uart", "ns16550a";
reg = <0x40080000 0x1000>;
interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
reg-shift = <2>;
@@ -282,7 +281,7 @@ uart3: serial@40080000 {
};
uart4: serial@40088000 {
- compatible = "nxp,lpc3220-uart";
+ compatible = "nxp,lpc3220-uart", "ns16550a";
reg = <0x40088000 0x1000>;
interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
reg-shift = <2>;
@@ -291,7 +290,7 @@ uart4: serial@40088000 {
};
uart6: serial@40098000 {
- compatible = "nxp,lpc3220-uart";
+ compatible = "nxp,lpc3220-uart", "ns16550a";
reg = <0x40098000 0x1000>;
interrupts = <10 IRQ_TYPE_LEVEL_HIGH>;
reg-shift = <2>;
--
2.43.0
prev parent reply other threads:[~2026-01-10 2:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-10 2:46 [PATCH 0/2] arm: dts: lpc32xx: Specify compatibility of platform UARTs with 16550A Vladimir Zapolskiy
2026-01-10 2:46 ` [PATCH 1/2] dt-bindings: serial: 8250: Explicitly make LPC32xx UARTs compatible " Vladimir Zapolskiy
2026-01-12 9:25 ` Krzysztof Kozlowski
2026-01-12 10:06 ` Vladimir Zapolskiy
2026-01-10 2:46 ` Vladimir Zapolskiy [this message]
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