Re: [RFT PATCH v3 24/27] tty: serial: samsung_tty: Add support for Apple UARTs
From: Krzysztof Kozlowski <hidden>
Date: 2021-03-05 11:00:05
Also in:
linux-arch, linux-devicetree, linux-doc, linux-samsung-soc, linux-serial, lkml
On 04/03/2021 22:38, Hector Martin wrote:
Apple SoCs are a distant descendant of Samsung designs and use yet another variant of their UART style, with different interrupt handling. In particular, this variant has the following differences with existing ones: * It includes a built-in interrupt controller with different registers, using only a single platform IRQ * Internal interrupt sources are treated as edge-triggered, even though the IRQ output is level-triggered. This chiefly affects the TX IRQ path: the driver can no longer rely on the TX buffer empty IRQ immediately firing after TX is enabled, but instead must prime the FIFO with data directly. Signed-off-by: Hector Martin <redacted> --- drivers/tty/serial/Kconfig | 2 +- drivers/tty/serial/samsung_tty.c | 238 +++++++++++++++++++++++++++++-- include/linux/serial_s3c.h | 16 +++ 3 files changed, 247 insertions(+), 9 deletions(-)
Reviewed-by: Krzysztof Kozlowski <redacted> Tested-by: Krzysztof Kozlowski <redacted> Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel