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regulator: pwm: Add support to have multiple instance of pwm regulator 

Some of platforms like Nvidia's Tegra210 Jetson-TX1 platform has
multiple PMW based regulators. Add support to have multiple instances
of the driver by not changing any global data of pwm regulator and
if required, making instance specific copy and then making changes.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Laxman Dewangan 2016-03-08 16:23:22 +05:30 committed by Mark Brown
parent 1aaab34878
commit f907a0a949
1 changed files with 20 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/regulator/pwm-regulator.c
View File

@ -27,6 +27,13 @@ struct pwm_regulator_data {
/* Voltage table */
struct pwm_voltages *duty_cycle_table;
/* regulator descriptor */
struct regulator_desc desc;
/* Regulator ops */
struct regulator_ops ops;
int state;
/* Continuous voltage */
@ -212,8 +219,10 @@ static int pwm_regulator_init_table(struct platform_device *pdev,
}
drvdata->duty_cycle_table = duty_cycle_table;
pwm_regulator_desc.ops = &pwm_regulator_voltage_table_ops;
pwm_regulator_desc.n_voltages = length / sizeof(*duty_cycle_table);
memcpy(&drvdata->ops, &pwm_regulator_voltage_table_ops,
sizeof(drvdata->ops));
drvdata->desc.ops = &drvdata->ops;
drvdata->desc.n_voltages = length / sizeof(*duty_cycle_table);
return 0;
}
@ -221,8 +230,10 @@ static int pwm_regulator_init_table(struct platform_device *pdev,
static int pwm_regulator_init_continuous(struct platform_device *pdev,
struct pwm_regulator_data *drvdata)
{
pwm_regulator_desc.ops = &pwm_regulator_voltage_continuous_ops;
pwm_regulator_desc.continuous_voltage_range = true;
memcpy(&drvdata->ops, &pwm_regulator_voltage_continuous_ops,
sizeof(drvdata->ops));
drvdata->desc.ops = &drvdata->ops;
drvdata->desc.continuous_voltage_range = true;
return 0;
}
@ -245,6 +256,8 @@ static int pwm_regulator_probe(struct platform_device *pdev)
if (!drvdata)
return -ENOMEM;
memcpy(&drvdata->desc, &pwm_regulator_desc, sizeof(drvdata->desc));
if (of_find_property(np, "voltage-table", NULL))
ret = pwm_regulator_init_table(pdev, drvdata);
else
@ -253,7 +266,7 @@ static int pwm_regulator_probe(struct platform_device *pdev)
return ret;
init_data = of_get_regulator_init_data(&pdev->dev, np,
&pwm_regulator_desc);
&drvdata->desc);
if (!init_data)
return -ENOMEM;
@ -269,10 +282,10 @@ static int pwm_regulator_probe(struct platform_device *pdev)
}
regulator = devm_regulator_register(&pdev->dev,
&pwm_regulator_desc, &config);
&drvdata->desc, &config);
if (IS_ERR(regulator)) {
dev_err(&pdev->dev, "Failed to register regulator %s\n",
pwm_regulator_desc.name);
drvdata->desc.name);
return PTR_ERR(regulator);
}