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Re: [PATCH 2/3] drivers: serial: add Qualcomm GENI-based serial driver
- To: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 2 Apr 2024 09:53:03 +0200
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Tue, 02 Apr 2024 07:53:17 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29.03.2024 01:08, Volodymyr Babchuk wrote:
> Generic Interface (GENI) is a newer interface for low speed interfaces
> like UART, I2C or SPI. This patch adds the simple driver for the UART
> instance of GENI. Code is based on similar drivers in U-Boot and Linux
> kernel.
>
> This driver implements only simple synchronous mode, because although
> GENI supports FIFO mode, it needs to know number of
> characters **before** starting TX transaction. This is a stark
> contrast when compared to other UART peripherals, which allow adding
> characters to a FIFO while TX operation is running.
>
> The patch adds both normal UART driver and earlyprintk version.
>
> Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
> ---
> xen/arch/arm/Kconfig.debug | 19 +-
> xen/arch/arm/arm64/debug-qcom.inc | 76 +++++++
> xen/arch/arm/include/asm/qcom-uart.h | 48 +++++
> xen/drivers/char/Kconfig | 8 +
> xen/drivers/char/Makefile | 1 +
> xen/drivers/char/qcom-uart.c | 288 +++++++++++++++++++++++++++
> 6 files changed, 439 insertions(+), 1 deletion(-)
> create mode 100644 xen/arch/arm/arm64/debug-qcom.inc
> create mode 100644 xen/arch/arm/include/asm/qcom-uart.h
> create mode 100644 xen/drivers/char/qcom-uart.c
This last new file wants mentioning in ./MAINTAINERS'es "ARM (W/
VIRTUALISATION EXTENSIONS) ARCHITECTURE" section, I suppose.
Jan
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