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Message-ID: <20141127120356.GF857@leverpostej>
Date: Thu, 27 Nov 2014 12:03:56 +0000
From: Mark Rutland <mark.rutland@....com>
To: Chunyan Zhang <chunyan.zhang@...eadtrum.com>
Cc: "grant.likely@...aro.org" <grant.likely@...aro.org>,
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Subject: Re: [PATCH v3 0/5] Add Spreadtrum Sharkl64 Platform support
Hi,
On Tue, Nov 25, 2014 at 12:16:53PM +0000, Chunyan Zhang wrote:
> Spreadtrum is a rapid growing chip vendor providing smart phone total solutions.
>
> Sharkl64 Platform is nominated as a SoC infrastructure that supports 4G/3G/2G
> standards based on ARMv8 multiple core architecture.Now we have only one
> SoC(SC9836) based on this Platform in developing.
>
> This patchset adds Sharkl64 support in arm64 device tree and the serial driver
> of SC9836-UART.
>
> This patchset also has patches which address "sprd" prefix and DT compatible
> strings for nodes which appear un-documented.
>
> This version code was tesed on Fast Mode.
This concerns me a bit because fast models are extremely lenient w.r.t.
the management of clocks and regulators. Are you sure you have
everything you need for your UART described?
> We use boot-wrapper-aarch64 as the bootloader.
Which version of boot-wrapper-aarch64 are you using?
Upstream does not implement PSCI 0.2, but its --enable-psci option will
inject PSCI 0.1 compatible properties, which leads me to suspect that
your DT is misleading. The boot wrapper should also program CNTFRQ_EL0
correctly regardless.
What do you intend to use on real hardware?
Thanks,
Mark.
>
> Changes from v2:
> * Addressed review comments:
> - Added a specific compitible string 'sc9836-uart' for the serial
> - Added a full serial driver
> - Added the property 'clock-frequency' for timer node in dtsi.
> - Replaceed the old macro prefix 'UART_' with 'SPRD_' in the
> Spreadtrum serial driver code.
> * Revised the name of SoC and board from 'sharkl3' to 'sc9836'
> * Used dual-license for DTS files
> * Added a menuconfig 'ARCH_SPRD' in arch/arm64/Kconfig
>
> Changes from v1:
> * Addressed review comments:
> - Added "sprd" prefix to vendor-prefixes.txt
> - Created serial/sprd-serial.txt and remove the properties for serial-sprd
> from of-serial.txt to it.
> - Renamed of-serial.txt to 8250.txt according to Arnd's review comments
> - Splited and revised .dts for Sharkl64 Platform
> - Changed to PSCI method for cpu power management
> - Revised Kconfig Makefile to match the alphabetical ordering
> - Renamed serial-sprd-earlycon.c to serial-sprd.c
>
> Chunyan Zhang (3):
> Documentation: DT: Renamed of-serial.txt to 8250.txt
> Documentation: DT: Add bindings for Spreadtrum SoC Platform
> tty/serial: Add Spreadtrum sc9836-uart driver support
>
> Zhizhou Zhang (2):
> arm64: dts: Add support for Spreadtrum SC9836 SoC in dts and Makefile
> arm64: Add support for Spreadtrum's Sharkl64 Platform in Kconfig and
> defconfig
>
> Documentation/devices.txt | 3 +
> Documentation/devicetree/bindings/arm/sprd.txt | 11 +
> .../bindings/serial/{of-serial.txt => 8250.txt} | 0
> .../devicetree/bindings/serial/sprd-uart.txt | 6 +
> .../devicetree/bindings/vendor-prefixes.txt | 1 +
> arch/arm64/Kconfig | 17 +
> arch/arm64/boot/dts/Makefile | 1 +
> arch/arm64/boot/dts/sprd-sc9836-openphone.dts | 85 +++
> arch/arm64/boot/dts/sprd-sc9836.dtsi | 103 +++
> arch/arm64/boot/dts/sprd-sharkl64.dtsi | 105 +++
> arch/arm64/configs/defconfig | 2 +
> drivers/tty/serial/Kconfig | 23 +
> drivers/tty/serial/Makefile | 1 +
> drivers/tty/serial/sprd_serial.c | 752 ++++++++++++++++++++
> include/uapi/linux/serial_core.h | 3 +
> 15 files changed, 1113 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/sprd.txt
> rename Documentation/devicetree/bindings/serial/{of-serial.txt => 8250.txt} (100%)
> create mode 100644 Documentation/devicetree/bindings/serial/sprd-uart.txt
> create mode 100644 arch/arm64/boot/dts/sprd-sc9836-openphone.dts
> create mode 100644 arch/arm64/boot/dts/sprd-sc9836.dtsi
> create mode 100644 arch/arm64/boot/dts/sprd-sharkl64.dtsi
> create mode 100644 drivers/tty/serial/sprd_serial.c
>
> --
> 1.7.9.5
>
>
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