[PATCH 3/6] mfd: add bcm59056 pmu driver

From
Matt Porter <hidden>
Date
2014-02-04 15:02:04
Also in
linux-devicetree, linux-i2c, lkml
Reply to
Lee Jones, 2014-02-04
On Tue, Feb 04, 2014 at 02:47:31PM +0000, Lee Jones wrote:
Hold your horses. :)
Holding :)
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Add a driver for the BCM59056 PMU multi-function device. The driver
initially supports regmap initialization and instantiation of the
voltage regulator device function of the PMU.

Signed-off-by: Matt Porter <redacted>
Reviewed-by: Tim Kryger <redacted>
Reviewed-by: Markus Mayer <redacted>
---
 drivers/mfd/Kconfig          |   8 +++
 drivers/mfd/Makefile         |   1 +
 drivers/mfd/bcm59056.c       | 119 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/bcm59056.h |  35 +++++++++++++
 4 files changed, 163 insertions(+)
 create mode 100644 drivers/mfd/bcm59056.c
 create mode 100644 include/linux/mfd/bcm59056.h
<snip>
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I thought this was a DT only driver? If so, you probably want to use
of_match_device() instead.
Correct, I'll use of_match_device()
If you're going to use this ...

<snip>
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You've gone to the trouble of setting a device version here, but you
don't seem to use it?
I'll drop the device version
... then you'll still need this.
Yes, I was far too vague..I'm going to stop explicitly populating the
data field.

static const struct of_device_id bcm59056_of_match[] = {
	{ .compatible = "brcm,bcm59056"},
	{ }
};
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+static const struct i2c_device_id bcm59056_i2c_id[] = {
+	{ "bcm59056", BCM59056 },
+	{ }
+};
Ah, I guess this is where id->driver comes from.

It's pretty silly that the I2C subsystem demands the presence of this
table, despite not using it if an of_device_id table is present.
It does make it very difficult to follow DT enabled I2C client drivers
:( I'll drop the BCM59056 too.
And I don't think you can drop this, as the I2C subsystem still
insists on it.
Agreed. I'm just dropping explicit population of the driver_data field
here.

static const struct i2c_device_id bcm59056_i2c_id[] = {
	{ "bcm59056" },
	{ }
};
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+/* chip id */
+#define BCM59056		0
Lonely, oh so lonely!
Understood. Will remove.
I think you need to keep this to supply the silly I2C ID table.

I would just omit the '.data = (void *) VERSION' from the
of_match_table until you require it. 
Well, it's not even necessary for I2C ID table. the I2C subsystem is
happy with just a matching entry on the i2c_device_id name field and
NULL driver_data. palmas is implemented in this manner.

-Matt
Thread (27 messages) 27 messages, 5 authors, last reply 2014-02-05
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