linux-kernel - [PATCH] serial: tegra: remove Kconfig dependency on APB DMA controller

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Message-Id: <20251126090759.4042709-1-flavra@baylibre.com>
Date: Wed, 26 Nov 2025 10:07:59 +0100
From: Francesco Lavra <flavra@...libre.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Kartik Rajput <kkartik@...dia.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Robert Marko <robert.marko@...tura.hr>,
	Thierry Bultel <thierry.bultel.yh@...renesas.com>,
	Douglas Anderson <dianders@...omium.org>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Subject: [PATCH] serial: tegra: remove Kconfig dependency on APB DMA controller

This driver runs also on SoCs without a Tegra20 APB DMA controller (e.g.
Tegra234).
Remove the Kconfig dependency on TEGRA20_APB_DMA, and remove reference to
the APB DMA controller from the Kconfig help text.

Fixes: 60d2016a5161 ("arm64: tegra: Add Tegra234 GPCDMA device tree node")
Signed-off-by: Francesco Lavra <flavra@...libre.com>
---
 drivers/tty/serial/Kconfig | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 44427415a80d..6212a814fdb7 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -255,14 +255,13 @@ config SERIAL_SAMSUNG_CONSOLE
 
 config SERIAL_TEGRA
 	tristate "NVIDIA Tegra20/30 SoC serial controller"
-	depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST
+	depends on ARCH_TEGRA || COMPILE_TEST
 	select SERIAL_CORE
 	help
 	  Support for the on-chip UARTs on the NVIDIA Tegra series SOCs
 	  providing /dev/ttyTHS0, 1, 2, 3 and 4 (note, some machines may not
 	  provide all of these ports, depending on how the serial port
-	  are enabled). This driver uses the APB DMA to achieve higher baudrate
-	  and better performance.
+	  are enabled).
 
 config SERIAL_TEGRA_TCU
 	tristate "NVIDIA Tegra Combined UART"
-- 
2.39.5