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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: Phil Reid <preid@electromag.com.au>
Link: https://lkml.kernel.org/r/1561691950-42154-3-git-send-email-preid@electromag.com.au
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Phil Reid 2019-06-28 11:19:10 +08:00 committed by Stephen Boyd
parent f121edb697
commit d69d0b4384
1 changed files with 34 additions and 0 deletions
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34
drivers/clk/clk-cdce925.c
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@ -16,6 +16,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/regmap.h> #include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/gcd.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; 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 /* The CDCE925 uses a funky way to read/write registers. Bulk mode is
* just weird, so just use the single byte mode exclusively. */ * just weird, so just use the single byte mode exclusively. */
static struct regmap_bus regmap_cdce925_bus = { 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__); 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); data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data) if (!data)
return -ENOMEM; return -ENOMEM;