regulator: i.MX anatop: Allow supply regulator

- anatop-delay-reg-offset: Anatop MFD step time register offset

- anatop-delay-bit-shift: Bit shift for the step time register

- anatop-delay-bit-width: Number of bits used in the step time register

- vin-supply: The supply for this regulator

Any property defined as part of the core regulator

binding, defined in regulator.txt, can also be used.

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>

#include <linux/regulator/machine.h>

#define LDO_RAMP_UP_UNIT_IN_CYCLES      64 /* 64 cycles per step */

#define LDO_RAMP_UP_FREQ_IN_MHZ         24 /* cycle based on 24M OSC */

	rdesc->owner = THIS_MODULE;

	initdata = of_get_regulator_init_data(dev, np, rdesc);

	initdata->supply_regulator = "vin";

	sreg->initdata = initdata;

	anatop_np = of_get_parent(np);

	rdesc->vsel_reg = sreg->control_reg;

	rdesc->vsel_mask = ((1 << sreg->vol_bit_width) - 1) <<

			   sreg->vol_bit_shift;

	rdesc->min_dropout_uV = 125000;

	config.dev = &pdev->dev;

	config.init_data = initdata;