regulator: i.MX anatop: Allow supply regulator

The anatop regulators are SoC internal LDO regulators usually supplied
by an external PMIC. This patch adds support for specifying the supply
from the device tree using the vin-supply property.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/regulator/anatop-regulator.txt b/Documentation/devicetree/bindings/regulator/anatop-regulator.txt
index 758eae24082a56567fbad2c9069a66606f7c4708..37c4ea076f88e694b773a6233e37c8dd68dc5192 100644 (file)
--- a/Documentation/devicetree/bindings/regulator/anatop-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/anatop-regulator.txt
@@ -13,6 +13,7 @@ Optional properties:
 - 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.

diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c
index 738adfa5332bcdc5f3ef935436dcf79ca512ea62..7d99f2c8cef3e95f48667cb3f12530138adb1895 100644 (file)
--- a/drivers/regulator/anatop-regulator.c
+++ b/drivers/regulator/anatop-regulator.c
@@ -30,6 +30,7 @@
 #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 */
@@ -199,6 +200,7 @@ static int anatop_regulator_probe(struct platform_device *pdev)
        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);
@@ -262,6 +264,7 @@ static int anatop_regulator_probe(struct platform_device *pdev)
        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;