Messages in this thread | | | Date | Thu, 26 Feb 2015 17:42:38 +0900 | From | Chanwoo Choi <> | Subject | Re: [PATCH v4 2/8] arm64: dts: exynos: Add dts files for 64-bit Exynos5433 SoC |
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Hi Arnd,
On 02/26/2015 05:18 PM, Chanwoo Choi wrote: > On 02/24/2015 08:59 PM, Arnd Bergmann wrote: >> On Tuesday 24 February 2015 20:04:17 Chanwoo Choi wrote: >>> On 02/24/2015 06:48 PM, Arnd Bergmann wrote: >>>> On Tuesday 24 February 2015 17:52:01 Chanwoo Choi wrote: >>>>> >>>>> But, I have a question. >>>>> If we put the aliases into the board dts file instaed of SoC dtsi, >>>>> each board dts file may use the different alias name about same phandle. >>>> >>>> Yes, that is the idea. In particular with the uarts, the intention is >>>> that the numbering of the device nodes in /dev is the same that is >>>> printed on the board (if any), which may be different from the numbering >>>> internal to the SoC. >>> >>> I check the uart device with Exynos5433 SoC based on Linux 4.0-rc1 >>> If some board use the serial_0 and serial_3 as following in board dtsi, >>> >>> &serial_0 { --> UART 0 device >>> status = "okay"; >>> }; >>> >>> &serial_3 { --> UART 3 device >>> status = "okay"; >>> }; >>> >>> The serial core driver create the follwoing /dev/ttySACx device node >>> by using the number of alias. It maintain the same device number of internel to the SoC. >>> >>> root@localhost:~# ls /dev/ttySAC >>> ttySAC1 ttySAC3 >>> >>
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> > So, I change the kernel command line about ('console' bootparam) as following: > because tty framework must use the 'console' bootparam to print kernel log.
I fix the my wrong expression. Some tty driver use the 'console' bootparam.
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Thanks, Chanwoo Choi
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