Re: [PATCH 3/3] i2c-axxia: support sequence command mode

Wolfram Sang
2018-12-11T20:04:36Z

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Hi,

> +static void axxia_i2c_handle_seq_nak(struct axxia_i2c_dev *idev)
> +{
> + while (readl(idev->base + MST_COMMAND) & CMD_BUSY)
> + udelay(100);
> +}

My code checkers rightfully complain about this:

CHECKPATCH
CHECK: usleep_range is preferred over udelay; see Documentation/timers/timers-howto.txt

SMATCH
drivers/i2c/busses/i2c-axxia.c:382 axxia_i2c_handle_seq_nak() warn: this loop depends on readl() succeeding

(and I get those as well, but not related to your patch; still while I am here)

GCC
drivers/i2c/busses/i2c-axxia.c:98: warning: cannot understand function prototype: 'struct axxia_i2c_dev '
drivers/i2c/busses/i2c-axxia.c:130: warning: Function parameter or member 'ns' not described in 'ns_to_clk'
drivers/i2c/busses/i2c-axxia.c:130: warning: Function parameter or member 'clk_mhz' not described in 'ns_to_clk'
drivers/i2c/busses/i2c-axxia.c:229: warning: Function parameter or member 'idev' not described in 'axxia_i2c_empty_rx_fifo'
drivers/i2c/busses/i2c-axxia.c:261: warning: Function parameter or member 'idev' not described in 'axxia_i2c_fill_tx_fifo'

Also, for $subject, please change the prefix to "i2c: axxia:"

Thanks,

Wolfram

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