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Commit d69d0b43 authored by Phil Reid's avatar Phil Reid Committed by Stephen Boyd
Browse files

clk: clk-cdce925: Add regulator support 



The cdce925 power supplies could be controllable on some platforms.
Enable them before communicating with the cdce925.

Signed-off-by: default avatarPhil Reid <preid@electromag.com.au>
Link: https://lkml.kernel.org/r/1561691950-42154-3-git-send-email-preid@electromag.com.au


Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent f121edb6

drivers/clk/clk-cdce925.c

+34 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/module.h>

#include <linux/i2c.h>

#include <linux/regmap.h>

#include <linux/regulator/consumer.h>

#include <linux/slab.h>

#include <linux/gcd.h>
@@ -602,6 +603,30 @@ of_clk_cdce925_get(struct of_phandle_args *clkspec, void *_data) 
	return &data->clk[idx].hw;

}



static void cdce925_regulator_disable(void *regulator)

{

	regulator_disable(regulator);

}



static int cdce925_regulator_enable(struct device *dev, const char *name)

{

	struct regulator *regulator;

	int err;



	regulator = devm_regulator_get(dev, name);

	if (IS_ERR(regulator))

		return PTR_ERR(regulator);



	err = regulator_enable(regulator);

	if (err) {

		dev_err(dev, "Failed to enable %s: %d\n", name, err);

		return err;

	}



	return devm_add_action_or_reset(dev, cdce925_regulator_disable,

					regulator);

}



/* The CDCE925 uses a funky way to read/write registers. Bulk mode is

 * just weird, so just use the single byte mode exclusively. */

static struct regmap_bus regmap_cdce925_bus = {
@@ -630,6 +655,15 @@ static int cdce925_probe(struct i2c_client *client, 
	};



	dev_dbg(&client->dev, "%s\n", __func__);



	err = cdce925_regulator_enable(&client->dev, "vdd");

	if (err)

		return err;



	err = cdce925_regulator_enable(&client->dev, "vddout");

	if (err)

		return err;



	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);

	if (!data)

		return -ENOMEM;