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Commit c6182ac9 authored by George McCollister's avatar George McCollister Committed by Mark Brown
Browse files

regulator: pfuze100-regulator: add coin support 



Add support for PF0200 coin cell/super capacitor charger which works as
a current limited voltage source via the LICELL pin. When VIN goes below
a certain threshold LICELL is used to provide power for VSNVS which is
usually used to hold up secure non-volatile storage and the real-time
clock on the SoC.

Signed-off-by: default avatarGeorge McCollister <george.mccollister@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d00b7461

Documentation/devicetree/bindings/regulator/pfuze100.txt

+7 −1
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ Required child node: 
  --PFUZE100

  sw1ab,sw1c,sw2,sw3a,sw3b,sw4,swbst,vsnvs,vrefddr,vgen1~vgen6

  --PFUZE200

  sw1ab,sw2,sw3a,sw3b,swbst,vsnvs,vrefddr,vgen1~vgen6

  sw1ab,sw2,sw3a,sw3b,swbst,vsnvs,vrefddr,vgen1~vgen6,coin

  --PFUZE3000

  sw1a,sw1b,sw2,sw3,swbst,vsnvs,vrefddr,vldo1,vldo2,vccsd,v33,vldo3,vldo4
@@ -205,6 +205,12 @@ Example 2: PFUZE200 
				regulator-max-microvolt = <3300000>;

				regulator-always-on;

			};



			coin_reg: coin {

				regulator-min-microvolt = <2500000>;

				regulator-max-microvolt = <3300000>;

				regulator-always-on;

			};

		};

	};

drivers/regulator/pfuze100-regulator.c

+24 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ 
#define PFUZE100_REVID		0x3

#define PFUZE100_FABID		0x4



#define PFUZE100_COINVOL	0x1a

#define PFUZE100_SW1ABVOL	0x20

#define PFUZE100_SW1CVOL	0x2e

#define PFUZE100_SW2VOL		0x35
@@ -81,6 +82,10 @@ static const int pfuze100_vsnvs[] = { 
	1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,

};



static const int pfuze100_coin[] = {

	2500000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,

};



static const int pfuze3000_sw2lo[] = {

	1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000,

};
@@ -230,6 +235,23 @@ static struct regulator_ops pfuze100_swb_regulator_ops = { 
		.stby_mask = 0x20,	\

	}



#define PFUZE100_COIN_REG(_chip, _name, base, mask, voltages)	\

	[_chip ## _ ##  _name] = {	\

		.desc = {	\

			.name = #_name,	\

			.n_voltages = ARRAY_SIZE(voltages),	\

			.ops = &pfuze100_swb_regulator_ops,	\

			.type = REGULATOR_VOLTAGE,	\

			.id = _chip ## _ ## _name,	\

			.owner = THIS_MODULE,	\

			.volt_table = voltages,	\

			.vsel_reg = (base),	\

			.vsel_mask = (mask),	\

			.enable_reg = (base),	\

			.enable_mask = 0x8,	\

		},	\

	}



#define PFUZE3000_VCC_REG(_chip, _name, base, min, max, step)	{	\

	.desc = {	\

		.name = #_name,	\
@@ -317,6 +339,7 @@ static struct pfuze_regulator pfuze200_regulators[] = { 
	PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),

	PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),

	PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),

	PFUZE100_COIN_REG(PFUZE200, COIN, PFUZE100_COINVOL, 0x7, pfuze100_coin),

};



static struct pfuze_regulator pfuze3000_regulators[] = {
@@ -371,6 +394,7 @@ static struct of_regulator_match pfuze200_matches[] = { 
	{ .name = "vgen4",	},

	{ .name = "vgen5",	},

	{ .name = "vgen6",	},

	{ .name = "coin",	},

};



/* PFUZE3000 */

include/linux/regulator/pfuze100.h

+1 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ 
#define PFUZE200_VGEN4		10

#define PFUZE200_VGEN5		11

#define PFUZE200_VGEN6		12

#define PFUZE200_COIN		13



#define PFUZE3000_SW1A		0

#define PFUZE3000_SW1B		1