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    SubjectRe: [PATCH v3 2/4] MFD MAX8998/LP3974: Support LP3974 RTC
    Hi MyungJoo,

    On Thu, Dec 23, 2010 at 05:53:37PM +0900, MyungJoo Ham wrote:
    > The first releases of LP3974 have a large delay in RTC registers,
    > which requires 2 seconds of delay after writing to a rtc register
    > (recommended by National Semiconductor's engineers)
    > before reading it. If the device name is "lp3974-regerr", the rtc driver
    > assumes that such delays are required. If the device name is "lp3974",
    > the rtc driver does not. Although we have not seen LP3974s without
    > requiring such delays, we assume that such LP3974s will be released
    > soon (or they have done so already) and they are supported by "lp3974".
    > This patch adds delays with msleep when writing values to RTC registers
    > if the device name is "lp3974-regerr".
    As Mark pointed out, I'd prefer to add a regerr flag to the driver platform
    data and decide which cell to add from there.


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