linux-kernel - [PATCH] arm64: defconfig: increase SERIAL_8250_NR

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Date:   Fri,  1 Dec 2023 00:16:57 +0100
From:   Francesco Dolcini <francesco@...cini.it>
To:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>
Cc:     Francesco Dolcini <francesco@...cini.it>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Tero Kristo <kristo@...nel.org>,
        Tony Lindgren <tony@...mide.com>
Subject: [PATCH] arm64: defconfig: increase SERIAL_8250_NR_UARTS

Increase CONFIG_SERIAL_8250_NR_UARTS from 4 to 8, the current legacy value
is not adequate for embedded systems that use SoCs where it's common to
have a large number of serial ports.

No need to change CONFIG_SERIAL_8250_RUNTIME_UARTS, see commit 9d86719f8769
("serial: 8250: Allow using ports higher than SERIAL_8250_RUNTIME_UARTS").

This enables using the UART connected Bluetooth device on Verdin AM62
board.

Cc: Tony Lindgren <tony@...mide.com>
Signed-off-by: Francesco Dolcini <francesco@...cini.it>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index b60aa1f89343..ecd365cd1d87 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -448,6 +448,7 @@ CONFIG_SERIO_AMBAKMI=y
 CONFIG_LEGACY_PTY_COUNT=16
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=8
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
 CONFIG_SERIAL_8250_BCM2835AUX=y
-- 
2.39.2