-----Original Message----- From: Wolfgang Denk wd@denx.de Sent: 2019年7月25日 15:34 To: Chuanhua Han chuanhua.han@nxp.com Cc: albert.u.boot@aribaud.net; Prabhakar Kushwaha prabhakar.kushwaha@nxp.com; Priyanka Jain priyanka.jain@nxp.com; Rajesh Bhagat rajesh.bhagat@nxp.com; u-boot@lists.denx.de; lukma@denx.de; trini@konsulko.com Subject: [EXT] Re: [PATCH v2 1/4] rtc: ds3232/ds3231: Add support to generate 32KHz output for driver module
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Dear Chuanhua Han,
In message 20190725043934.30236-1-chuanhua.han@nxp.com you wrote:
This patch add an implementation of the rtc_enable_32khz_output() that uses the driver model i2c APIs.
...
+config DS3231_BUS_NUM
hex "I2C bus of the DS3231 device"default 0I know this is likely just an academic question - buit what happens if we have two such devices on different busses?
Ah, that really needs to be considered! Then the method I came up with is: take the rtc_enable_32khz_output function with the udeice parameter to uniquely determine the specific RTC device, and then set the register. I wonder if this method is feasible?
Best regards,
Wolfgang Denk
-- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de "Beware of bugs in the above code; I have only proved it correct, not tried it." - Donald Knuth