On Fri, 13 Sep 2013, Linus Walleij wrote:
> This adds a driver for the STw481x PMICs found in the Nomadik
> family of platforms. This one uses pure device tree probing.
> Print some of the OTP registers on boot and register a regulator
> MFD child.
>
> Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
> ---
> Hi Sam/Lee, I'm seeking an ACK for this driver to take it through
> the ARM SoC tree with the enablement patches.
Sorry, not just yet. I need to straighten out one last thing.
> ChangeLog v1->v2:
> - Fix remnant checkpatch errors.
> - #define some more registers to make things clear.
> - Document the power control register access function.
> - Don't free devm_*-allocated devices.
> - Use module_i2c_driver() macro.
> ---
> drivers/mfd/Kconfig | 10 ++
> drivers/mfd/Makefile | 1 +
> drivers/mfd/stw481x.c | 250
> ++++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/stw481x.h | 56 ++++++++++
> 4 files changed, 317 insertions(+)
> create mode 100644 drivers/mfd/stw481x.c
> create mode 100644 include/linux/mfd/stw481x.h
>
> +/*
> + * This ID table is completely unused, as this is a pure
> + * device-tree probed driver, but it has to be here due to
> + * the structure of the I2C core.
> + */
>From what I can gather, the code doesn't agree with you.
> +static const struct i2c_device_id dummy_id[] = {
> + { "dummy", 0 },
> + { }
> +};
Can't you just NULL .id_table?
Here's the code which would use it:
> /* match on an id table if there is one */
> if (driver->id_table)
> return i2c_match_id(driver->id_table, client) != NULL;
Matching for "dummy" will just waste cycles.
> +static struct i2c_driver stw481x_driver = {
> + .driver = {
> + .name = "stw481x",
> + .of_match_table = stw481x_match,
> + },
> + .probe = stw481x_probe,
> + .remove = stw481x_remove,
> + .id_table = dummy_id,
> +};
> +
> +module_i2c_driver(stw481x_driver);
> +
> +MODULE_AUTHOR("Linus Walleij");
> +MODULE_DESCRIPTION("STw481x PMIC driver");
> +MODULE_LICENSE("GPL v2");
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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