regulator: fixed: add off-on-delay
Depends on board design, the gpio controlling regulator may connects with a big capacitance. When need off, it takes some time to let the regulator to be truly off. If not add enough delay, the regulator might have always been on, so introduce off-on-delay to handle such case. Signed-off-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/1572311875-22880-3-git-send-email-peng.fan@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org> (cherry picked from commit f7907e57aea2adcd0b57ebcca410e125412ab680)
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@ -123,6 +123,7 @@ of_get_fixed_voltage_config(struct device *dev,
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config->enabled_at_boot = true;
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of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
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of_property_read_u32(np, "off-on-delay-us", &config->off_on_delay);
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if (of_find_property(np, "vin-supply", NULL))
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config->input_supply = "vin";
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@ -189,6 +190,7 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
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}
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drvdata->desc.enable_time = config->startup_delay;
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drvdata->desc.off_on_delay = config->off_on_delay;
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if (config->input_supply) {
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drvdata->desc.supply_name = devm_kstrdup(&pdev->dev,
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@ -36,6 +36,7 @@ struct fixed_voltage_config {
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const char *input_supply;
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int microvolts;
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unsigned startup_delay;
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unsigned int off_on_delay;
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unsigned enabled_at_boot:1;
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struct regulator_init_data *init_data;
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};
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