regulator: Factor out common enable code
In preparation of being able to enable/disable GPIO regulators, the
code that will be shared among the two kinds to regulators is factored
out into its own source files.
Signed-off-by: Sven Schwermer <sven@svenschwermer.de>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/drivers/power/regulator/regulator_common.c b/drivers/power/regulator/regulator_common.c
new file mode 100644
index 0000000..3dabbe2
--- /dev/null
+++ b/drivers/power/regulator/regulator_common.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Disruptive Technologies Research AS
+ * Sven Schwermer <sven.svenschwermer@disruptive-technologies.com>
+ */
+
+#include "regulator_common.h"
+#include <common.h>
+#include <power/regulator.h>
+
+int regulator_common_ofdata_to_platdata(struct udevice *dev,
+ struct regulator_common_platdata *dev_pdata, const char *enable_gpio_name)
+{
+ struct gpio_desc *gpio;
+ int flags = GPIOD_IS_OUT;
+ int ret;
+
+ if (dev_read_bool(dev, "enable-active-high"))
+ flags |= GPIOD_IS_OUT_ACTIVE;
+
+ /* Get optional enable GPIO desc */
+ gpio = &dev_pdata->gpio;
+ ret = gpio_request_by_name(dev, enable_gpio_name, 0, gpio, flags);
+ if (ret) {
+ debug("Regulator '%s' optional enable GPIO - not found! Error: %d\n",
+ dev->name, ret);
+ if (ret != -ENOENT)
+ return ret;
+ }
+
+ /* Get optional ramp up delay */
+ dev_pdata->startup_delay_us = dev_read_u32_default(dev,
+ "startup-delay-us", 0);
+ dev_pdata->off_on_delay_us =
+ dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
+
+ return 0;
+}
+
+int regulator_common_get_enable(const struct udevice *dev,
+ struct regulator_common_platdata *dev_pdata)
+{
+ /* Enable GPIO is optional */
+ if (!dev_pdata->gpio.dev)
+ return true;
+
+ return dm_gpio_get_value(&dev_pdata->gpio);
+}
+
+int regulator_common_set_enable(const struct udevice *dev,
+ struct regulator_common_platdata *dev_pdata, bool enable)
+{
+ int ret;
+
+ debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
+ dev->name, enable, dev_pdata->startup_delay_us,
+ dm_gpio_is_valid(&dev_pdata->gpio));
+ /* Enable GPIO is optional */
+ if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
+ if (!enable)
+ return -ENOSYS;
+ return 0;
+ }
+
+ ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
+ if (ret) {
+ pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
+ enable);
+ return ret;
+ }
+
+ if (enable && dev_pdata->startup_delay_us)
+ udelay(dev_pdata->startup_delay_us);
+ debug("%s: done\n", __func__);
+
+ if (!enable && dev_pdata->off_on_delay_us)
+ udelay(dev_pdata->off_on_delay_us);
+
+ return 0;
+}