Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-18 18:11:56 +00:00
Code Issues Packages Projects Releases Wiki Activity
4f3fb28735
linux/drivers/regulator/mc13892-regulator.c
Linus Torvalds 68cc38ff33 regulator: Updates for v4.18 
Quite a lot of core work this time around, though not 100% successful.
 
 We gained support for runtime mode changes thanks to David Collins and
 improved support for write only regulators (ones where we can't read
 back the configuration) from Douglas Anderson.
 
 There's been quite a bit of work from Linus Walleij on converting from
 specfying GPIOs by numbers to descriptors.  Sadly the testing turned out
 to be less good than we had hoped and so a lot of this had to be
 reverted.
 
 We also have the start of updates to use coupled regulators from Maciej
 Purski, unfortunately there are further problems there so the last
 couple of patches have been reverted.
 
 We also have new drivers for BD71837 and SY8106A devices, SAW regulators
 on Qualcomm SPMI and dropped support for some preproduction chips
 that never made it to market from the AB8500 driver.
 -----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCgAxFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAlsarcETHGJyb29uaWVA
 a2VybmVsLm9yZwAKCRAk1otyXVSH0B4HB/9MFV/MK7Hw2hsVCX3qWTiH4tJ/X0MG
 tGz1PfmbH0CJ9ly5g+rvCoT+1/s7BydKzi1cd1RHnimBv2U1XagwSny3LNEcJs2Q
 pmhpGViakkQI/Y2h+u/j0Jk1nE+jTiKk+1ozUB7YnPekrGyQlf7TMhvKOLTvLKyX
 56jdNxcW0MgSnXV2N6y4NpWhgvrQwvKjacTxV5iX7WP2rnK2WNFeG7Q859buhtI0
 znRi+tO5hZsw5T44ickdPfotZn+i5o7MYLCkkaA2h1EwtpbYwVINfUjp3KtuyFhH
 3B9GmCsjjN2Z2eInnkpzWfVXK2S1Vlp6+ka2FSs+U/4rVdd3Bw2KkblS
 =Ftua
 -----END PGP SIGNATURE-----

Merge tag 'regulator-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator updates from Mark Brown:
 "Quite a lot of core work this time around, though not 100% successful.

  We gained support for runtime mode changes thanks to David Collins and
  improved support for write only regulators (ones where we can't read
  back the configuration) from Douglas Anderson.

  There's been quite a bit of work from Linus Walleij on converting from
  specfying GPIOs by numbers to descriptors. Sadly the testing turned
  out to be less good than we had hoped and so a lot of this had to be
  reverted.

  We also have the start of updates to use coupled regulators from
  Maciej Purski, unfortunately there are further problems there so the
  last couple of patches have been reverted.

  We also have new drivers for BD71837 and SY8106A devices, SAW
  regulators on Qualcomm SPMI and dropped support for some preproduction
  chips that never made it to market from the AB8500 driver"

* tag 'regulator-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (57 commits)
  regulator: gpio: Revert
  ARM: pxa, regulator: fix building ezx e680
  regulator: Revert coupled regulator support again
  regulator: wm8994: Fix shared GPIOs
  regulator: max77686: Fix shared GPIOs
  regulator: bd71837: BD71837 PMIC regulator driver
  regulator: bd71837: Devicetree bindings for BD71837 regulators
  regulator: gpio: Get enable GPIO using GPIO descriptor
  regulator: fixed: Convert to use GPIO descriptor only
  regulator: s2mps11: Fix boot on Odroid XU3
  dt-bindings: qcom_spmi: Document SAW support
  regulator: qcom_spmi: Add support for SAW
  regulator: tps65090: Pass descriptor instead of GPIO number
  regulator: s5m8767: Pass descriptor instead of GPIO number
  regulator: pfuze100: Delete reference to ena_gpio
  regulator: max8952: Pass descriptor instead of GPIO number
  regulator: lp8788-ldo: Pass descriptor instead of GPIO number
  regulator: lm363x: Pass descriptor instead of GPIO number
  regulator: max8973: Pass descriptor instead of GPIO number
  regulator: mc13xxx-core: Switch to SPDX identifier
  ...
2018-06-08 13:08:57 -07:00

652 lines
20 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
//
// Regulator Driver for Freescale MC13892 PMIC
//
// Copyright 2010 Yong Shen <yong.shen@linaro.org>
//
// Based on draft driver from Arnaud Patard <arnaud.patard@rtp-net.org>
#include <linux/mfd/mc13892.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/module.h>
#include "mc13xxx.h"
#define MC13892_REVISION 7
#define MC13892_POWERCTL0 13
#define MC13892_POWERCTL0_USEROFFSPI 3
#define MC13892_POWERCTL0_VCOINCELLVSEL 20
#define MC13892_POWERCTL0_VCOINCELLVSEL_M (7<<20)
#define MC13892_POWERCTL0_VCOINCELLEN (1<<23)
#define MC13892_SWITCHERS0_SWxHI (1<<23)
#define MC13892_SWITCHERS0 24
#define MC13892_SWITCHERS0_SW1VSEL 0
#define MC13892_SWITCHERS0_SW1VSEL_M (0x1f<<0)
#define MC13892_SWITCHERS0_SW1HI (1<<23)
#define MC13892_SWITCHERS0_SW1EN 0
#define MC13892_SWITCHERS1 25
#define MC13892_SWITCHERS1_SW2VSEL 0
#define MC13892_SWITCHERS1_SW2VSEL_M (0x1f<<0)
#define MC13892_SWITCHERS1_SW2HI (1<<23)
#define MC13892_SWITCHERS1_SW2EN 0
#define MC13892_SWITCHERS2 26
#define MC13892_SWITCHERS2_SW3VSEL 0
#define MC13892_SWITCHERS2_SW3VSEL_M (0x1f<<0)
#define MC13892_SWITCHERS2_SW3HI (1<<23)
#define MC13892_SWITCHERS2_SW3EN 0
#define MC13892_SWITCHERS3 27
#define MC13892_SWITCHERS3_SW4VSEL 0
#define MC13892_SWITCHERS3_SW4VSEL_M (0x1f<<0)
#define MC13892_SWITCHERS3_SW4HI (1<<23)
#define MC13892_SWITCHERS3_SW4EN 0
#define MC13892_SWITCHERS4 28
#define MC13892_SWITCHERS4_SW1MODE 0
#define MC13892_SWITCHERS4_SW1MODE_AUTO (8<<0)
#define MC13892_SWITCHERS4_SW1MODE_M (0xf<<0)
#define MC13892_SWITCHERS4_SW2MODE 10
#define MC13892_SWITCHERS4_SW2MODE_AUTO (8<<10)
#define MC13892_SWITCHERS4_SW2MODE_M (0xf<<10)
#define MC13892_SWITCHERS5 29
#define MC13892_SWITCHERS5_SW3MODE 0
#define MC13892_SWITCHERS5_SW3MODE_AUTO (8<<0)
#define MC13892_SWITCHERS5_SW3MODE_M (0xf<<0)
#define MC13892_SWITCHERS5_SW4MODE 8
#define MC13892_SWITCHERS5_SW4MODE_AUTO (8<<8)
#define MC13892_SWITCHERS5_SW4MODE_M (0xf<<8)
#define MC13892_SWITCHERS5_SWBSTEN (1<<20)
#define MC13892_REGULATORSETTING0 30
#define MC13892_REGULATORSETTING0_VGEN1VSEL 0
#define MC13892_REGULATORSETTING0_VDIGVSEL 4
#define MC13892_REGULATORSETTING0_VGEN2VSEL 6
#define MC13892_REGULATORSETTING0_VPLLVSEL 9
#define MC13892_REGULATORSETTING0_VUSB2VSEL 11
#define MC13892_REGULATORSETTING0_VGEN3VSEL 14
#define MC13892_REGULATORSETTING0_VCAMVSEL 16
#define MC13892_REGULATORSETTING0_VGEN1VSEL_M (3<<0)
#define MC13892_REGULATORSETTING0_VDIGVSEL_M (3<<4)
#define MC13892_REGULATORSETTING0_VGEN2VSEL_M (7<<6)
#define MC13892_REGULATORSETTING0_VPLLVSEL_M (3<<9)
#define MC13892_REGULATORSETTING0_VUSB2VSEL_M (3<<11)
#define MC13892_REGULATORSETTING0_VGEN3VSEL_M (1<<14)
#define MC13892_REGULATORSETTING0_VCAMVSEL_M (3<<16)
#define MC13892_REGULATORSETTING1 31
#define MC13892_REGULATORSETTING1_VVIDEOVSEL 2
#define MC13892_REGULATORSETTING1_VAUDIOVSEL 4
#define MC13892_REGULATORSETTING1_VSDVSEL 6
#define MC13892_REGULATORSETTING1_VVIDEOVSEL_M (3<<2)
#define MC13892_REGULATORSETTING1_VAUDIOVSEL_M (3<<4)
#define MC13892_REGULATORSETTING1_VSDVSEL_M (7<<6)
#define MC13892_REGULATORMODE0 32
#define MC13892_REGULATORMODE0_VGEN1EN (1<<0)
#define MC13892_REGULATORMODE0_VGEN1STDBY (1<<1)
#define MC13892_REGULATORMODE0_VGEN1MODE (1<<2)
#define MC13892_REGULATORMODE0_VIOHIEN (1<<3)
#define MC13892_REGULATORMODE0_VIOHISTDBY (1<<4)
#define MC13892_REGULATORMODE0_VIOHIMODE (1<<5)
#define MC13892_REGULATORMODE0_VDIGEN (1<<9)
#define MC13892_REGULATORMODE0_VDIGSTDBY (1<<10)
#define MC13892_REGULATORMODE0_VDIGMODE (1<<11)
#define MC13892_REGULATORMODE0_VGEN2EN (1<<12)
#define MC13892_REGULATORMODE0_VGEN2STDBY (1<<13)
#define MC13892_REGULATORMODE0_VGEN2MODE (1<<14)
#define MC13892_REGULATORMODE0_VPLLEN (1<<15)
#define MC13892_REGULATORMODE0_VPLLSTDBY (1<<16)
#define MC13892_REGULATORMODE0_VPLLMODE (1<<17)
#define MC13892_REGULATORMODE0_VUSB2EN (1<<18)
#define MC13892_REGULATORMODE0_VUSB2STDBY (1<<19)
#define MC13892_REGULATORMODE0_VUSB2MODE (1<<20)
#define MC13892_REGULATORMODE1 33
#define MC13892_REGULATORMODE1_VGEN3EN (1<<0)
#define MC13892_REGULATORMODE1_VGEN3STDBY (1<<1)
#define MC13892_REGULATORMODE1_VGEN3MODE (1<<2)
#define MC13892_REGULATORMODE1_VCAMEN (1<<6)
#define MC13892_REGULATORMODE1_VCAMSTDBY (1<<7)
#define MC13892_REGULATORMODE1_VCAMMODE (1<<8)
#define MC13892_REGULATORMODE1_VCAMCONFIGEN (1<<9)
#define MC13892_REGULATORMODE1_VVIDEOEN (1<<12)
#define MC13892_REGULATORMODE1_VVIDEOSTDBY (1<<13)
#define MC13892_REGULATORMODE1_VVIDEOMODE (1<<14)
#define MC13892_REGULATORMODE1_VAUDIOEN (1<<15)
#define MC13892_REGULATORMODE1_VAUDIOSTDBY (1<<16)
#define MC13892_REGULATORMODE1_VAUDIOMODE (1<<17)
#define MC13892_REGULATORMODE1_VSDEN (1<<18)
#define MC13892_REGULATORMODE1_VSDSTDBY (1<<19)
#define MC13892_REGULATORMODE1_VSDMODE (1<<20)
#define MC13892_POWERMISC 34
#define MC13892_POWERMISC_GPO1EN (1<<6)
#define MC13892_POWERMISC_GPO2EN (1<<8)
#define MC13892_POWERMISC_GPO3EN (1<<10)
#define MC13892_POWERMISC_GPO4EN (1<<12)
#define MC13892_POWERMISC_PWGT1SPIEN (1<<15)
#define MC13892_POWERMISC_PWGT2SPIEN (1<<16)
#define MC13892_POWERMISC_GPO4ADINEN (1<<21)
#define MC13892_POWERMISC_PWGTSPI_M (3 << 15)
#define MC13892_USB1 50
#define MC13892_USB1_VUSBEN (1<<3)
static const unsigned int mc13892_vcoincell[] = {
2500000, 2700000, 2800000, 2900000, 3000000, 3100000,
3200000, 3300000,
};
static const unsigned int mc13892_sw1[] = {
600000, 625000, 650000, 675000, 700000, 725000,
750000, 775000, 800000, 825000, 850000, 875000,
900000, 925000, 950000, 975000, 1000000, 1025000,
1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
1200000, 1225000, 1250000, 1275000, 1300000, 1325000,
1350000, 1375000
};
/*
* Note: this table is used to derive SWxVSEL by index into
* the array. Offset the values by the index of 1100000uV
* to get the actual register value for that voltage selector
* if the HI bit is to be set as well.
*/
#define MC13892_SWxHI_SEL_OFFSET 20
static const unsigned int mc13892_sw[] = {
600000, 625000, 650000, 675000, 700000, 725000,
750000, 775000, 800000, 825000, 850000, 875000,
900000, 925000, 950000, 975000, 1000000, 1025000,
1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
1200000, 1225000, 1250000, 1275000, 1300000, 1325000,
1350000, 1375000, 1400000, 1425000, 1450000, 1475000,
1500000, 1525000, 1550000, 1575000, 1600000, 1625000,
1650000, 1675000, 1700000, 1725000, 1750000, 1775000,
1800000, 1825000, 1850000, 1875000
};
static const unsigned int mc13892_swbst[] = {
5000000,
};
static const unsigned int mc13892_viohi[] = {
2775000,
};
static const unsigned int mc13892_vpll[] = {
1050000, 1250000, 1650000, 1800000,
};
static const unsigned int mc13892_vdig[] = {
1050000, 1250000, 1650000, 1800000,
};
static const unsigned int mc13892_vsd[] = {
1800000, 2000000, 2600000, 2700000,
2800000, 2900000, 3000000, 3150000,
};
static const unsigned int mc13892_vusb2[] = {
2400000, 2600000, 2700000, 2775000,
};
static const unsigned int mc13892_vvideo[] = {
2700000, 2775000, 2500000, 2600000,
};
static const unsigned int mc13892_vaudio[] = {
2300000, 2500000, 2775000, 3000000,
};
static const unsigned int mc13892_vcam[] = {
2500000, 2600000, 2750000, 3000000,
};
static const unsigned int mc13892_vgen1[] = {
1200000, 1500000, 2775000, 3150000,
};
static const unsigned int mc13892_vgen2[] = {
1200000, 1500000, 1600000, 1800000,
2700000, 2800000, 3000000, 3150000,
};
static const unsigned int mc13892_vgen3[] = {
1800000, 2900000,
};
static const unsigned int mc13892_vusb[] = {
3300000,
};
static const unsigned int mc13892_gpo[] = {
2750000,
};
static const unsigned int mc13892_pwgtdrv[] = {
5000000,
};
static struct regulator_ops mc13892_gpo_regulator_ops;
static struct regulator_ops mc13892_sw_regulator_ops;
#define MC13892_FIXED_DEFINE(name, reg, voltages) \
MC13xxx_FIXED_DEFINE(MC13892_, name, reg, voltages, \
mc13xxx_fixed_regulator_ops)
#define MC13892_GPO_DEFINE(name, reg, voltages) \
MC13xxx_GPO_DEFINE(MC13892_, name, reg, voltages, \
mc13892_gpo_regulator_ops)
#define MC13892_SW_DEFINE(name, reg, vsel_reg, voltages) \
MC13xxx_DEFINE(MC13892_, name, reg, vsel_reg, voltages, \
mc13892_sw_regulator_ops)
#define MC13892_DEFINE_REGU(name, reg, vsel_reg, voltages) \
MC13xxx_DEFINE(MC13892_, name, reg, vsel_reg, voltages, \
mc13xxx_regulator_ops)
static struct mc13xxx_regulator mc13892_regulators[] = {
MC13892_DEFINE_REGU(VCOINCELL, POWERCTL0, POWERCTL0, mc13892_vcoincell),
MC13892_SW_DEFINE(SW1, SWITCHERS0, SWITCHERS0, mc13892_sw1),
MC13892_SW_DEFINE(SW2, SWITCHERS1, SWITCHERS1, mc13892_sw),
MC13892_SW_DEFINE(SW3, SWITCHERS2, SWITCHERS2, mc13892_sw),
MC13892_SW_DEFINE(SW4, SWITCHERS3, SWITCHERS3, mc13892_sw),
MC13892_FIXED_DEFINE(SWBST, SWITCHERS5, mc13892_swbst),
MC13892_FIXED_DEFINE(VIOHI, REGULATORMODE0, mc13892_viohi),
MC13892_DEFINE_REGU(VPLL, REGULATORMODE0, REGULATORSETTING0,
mc13892_vpll),
MC13892_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,
mc13892_vdig),
MC13892_DEFINE_REGU(VSD, REGULATORMODE1, REGULATORSETTING1,
mc13892_vsd),
MC13892_DEFINE_REGU(VUSB2, REGULATORMODE0, REGULATORSETTING0,
mc13892_vusb2),
MC13892_DEFINE_REGU(VVIDEO, REGULATORMODE1, REGULATORSETTING1,
mc13892_vvideo),
MC13892_DEFINE_REGU(VAUDIO, REGULATORMODE1, REGULATORSETTING1,
mc13892_vaudio),
MC13892_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,
mc13892_vcam),
MC13892_DEFINE_REGU(VGEN1, REGULATORMODE0, REGULATORSETTING0,
mc13892_vgen1),
MC13892_DEFINE_REGU(VGEN2, REGULATORMODE0, REGULATORSETTING0,
mc13892_vgen2),
MC13892_DEFINE_REGU(VGEN3, REGULATORMODE1, REGULATORSETTING0,
mc13892_vgen3),
MC13892_FIXED_DEFINE(VUSB, USB1, mc13892_vusb),
MC13892_GPO_DEFINE(GPO1, POWERMISC, mc13892_gpo),
MC13892_GPO_DEFINE(GPO2, POWERMISC, mc13892_gpo),
MC13892_GPO_DEFINE(GPO3, POWERMISC, mc13892_gpo),
MC13892_GPO_DEFINE(GPO4, POWERMISC, mc13892_gpo),
MC13892_GPO_DEFINE(PWGT1SPI, POWERMISC, mc13892_pwgtdrv),
MC13892_GPO_DEFINE(PWGT2SPI, POWERMISC, mc13892_pwgtdrv),
};
static int mc13892_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
u32 val)
{
struct mc13xxx *mc13892 = priv->mc13xxx;
int ret;
u32 valread;
BUG_ON(val & ~mask);
mc13xxx_lock(priv->mc13xxx);
ret = mc13xxx_reg_read(mc13892, MC13892_POWERMISC, &valread);
if (ret)
goto out;
/* Update the stored state for Power Gates. */
priv->powermisc_pwgt_state =
(priv->powermisc_pwgt_state & ~mask) | val;
priv->powermisc_pwgt_state &= MC13892_POWERMISC_PWGTSPI_M;
/* Construct the new register value */
valread = (valread & ~mask) | val;
/* Overwrite the PWGTxEN with the stored version */
valread = (valread & ~MC13892_POWERMISC_PWGTSPI_M) |
priv->powermisc_pwgt_state;
ret = mc13xxx_reg_write(mc13892, MC13892_POWERMISC, valread);
out:
mc13xxx_unlock(priv->mc13xxx);
return ret;
}
static int mc13892_gpo_regulator_enable(struct regulator_dev *rdev)
{
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
u32 en_val = mc13892_regulators[id].enable_bit;
u32 mask = mc13892_regulators[id].enable_bit;
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
/* Power Gate enable value is 0 */
if (id == MC13892_PWGT1SPI || id == MC13892_PWGT2SPI)
en_val = 0;
if (id == MC13892_GPO4)
mask |= MC13892_POWERMISC_GPO4ADINEN;
return mc13892_powermisc_rmw(priv, mask, en_val);
}
static int mc13892_gpo_regulator_disable(struct regulator_dev *rdev)
{
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
u32 dis_val = 0;
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
/* Power Gate disable value is 1 */
if (id == MC13892_PWGT1SPI || id == MC13892_PWGT2SPI)
dis_val = mc13892_regulators[id].enable_bit;
return mc13892_powermisc_rmw(priv, mc13892_regulators[id].enable_bit,
dis_val);
}
static int mc13892_gpo_regulator_is_enabled(struct regulator_dev *rdev)
{
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
unsigned int val;
mc13xxx_lock(priv->mc13xxx);
ret = mc13xxx_reg_read(priv->mc13xxx, mc13892_regulators[id].reg, &val);
mc13xxx_unlock(priv->mc13xxx);
if (ret)
return ret;
/* Power Gates state is stored in powermisc_pwgt_state
* where the meaning of bits is negated */
val = (val & ~MC13892_POWERMISC_PWGTSPI_M) |
(priv->powermisc_pwgt_state ^ MC13892_POWERMISC_PWGTSPI_M);
return (val & mc13892_regulators[id].enable_bit) != 0;
}
static struct regulator_ops mc13892_gpo_regulator_ops = {
.enable = mc13892_gpo_regulator_enable,
.disable = mc13892_gpo_regulator_disable,
.is_enabled = mc13892_gpo_regulator_is_enabled,
.list_voltage = regulator_list_voltage_table,
.set_voltage = mc13xxx_fixed_regulator_set_voltage,
};
static int mc13892_sw_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
unsigned int val, selector;
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
mc13xxx_lock(priv->mc13xxx);
ret = mc13xxx_reg_read(priv->mc13xxx,
mc13892_regulators[id].vsel_reg, &val);
mc13xxx_unlock(priv->mc13xxx);
if (ret)
return ret;
/*
* Figure out if the HI bit is set inside the switcher mode register
* since this means the selector value we return is at a different
* offset into the selector table.
*
* According to the MC13892 documentation note 59 (Table 47) the SW1
* buck switcher does not support output range programming therefore
* the HI bit must always remain 0. So do not do anything strange if
* our register is MC13892_SWITCHERS0.
*/
selector = val & mc13892_regulators[id].vsel_mask;
if ((mc13892_regulators[id].vsel_reg != MC13892_SWITCHERS0) &&
(val & MC13892_SWITCHERS0_SWxHI)) {
selector += MC13892_SWxHI_SEL_OFFSET;
}
dev_dbg(rdev_get_dev(rdev), "%s id: %d val: 0x%08x selector: %d\n",
__func__, id, val, selector);
return selector;
}
static int mc13892_sw_regulator_set_voltage_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int volt, mask, id = rdev_get_id(rdev);
u32 reg_value;
int ret;
volt = rdev->desc->volt_table[selector];
mask = mc13892_regulators[id].vsel_mask;
reg_value = selector;
/*
* Don't mess with the HI bit or support HI voltage offsets for SW1.
*
* Since the get_voltage_sel callback has given a fudged value for
* the selector offset, we need to back out that offset if HI is
* to be set so we write the correct value to the register.
*
* The HI bit addition and selector offset handling COULD be more
* complicated by shifting and masking off the voltage selector part
* of the register then logical OR it back in, but since the selector
* is at bits 4:0 there is very little point. This makes the whole
* thing more readable and we do far less work.
*/
if (mc13892_regulators[id].vsel_reg != MC13892_SWITCHERS0) {
mask |= MC13892_SWITCHERS0_SWxHI;
if (volt > 1375000) {
reg_value -= MC13892_SWxHI_SEL_OFFSET;
reg_value |= MC13892_SWITCHERS0_SWxHI;
} else {
reg_value &= ~MC13892_SWITCHERS0_SWxHI;
}
}
mc13xxx_lock(priv->mc13xxx);
ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].vsel_reg,
mask, reg_value);
mc13xxx_unlock(priv->mc13xxx);
return ret;
}
static struct regulator_ops mc13892_sw_regulator_ops = {
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.set_voltage_sel = mc13892_sw_regulator_set_voltage_sel,
.get_voltage_sel = mc13892_sw_regulator_get_voltage_sel,
};
static int mc13892_vcam_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
unsigned int en_val = 0;
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
if (mode == REGULATOR_MODE_FAST)
en_val = MC13892_REGULATORMODE1_VCAMCONFIGEN;
mc13xxx_lock(priv->mc13xxx);
ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].reg,
MC13892_REGULATORMODE1_VCAMCONFIGEN, en_val);
mc13xxx_unlock(priv->mc13xxx);
return ret;
}
static unsigned int mc13892_vcam_get_mode(struct regulator_dev *rdev)
{
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
unsigned int val;
mc13xxx_lock(priv->mc13xxx);
ret = mc13xxx_reg_read(priv->mc13xxx, mc13892_regulators[id].reg, &val);
mc13xxx_unlock(priv->mc13xxx);
if (ret)
return ret;
if (val & MC13892_REGULATORMODE1_VCAMCONFIGEN)
return REGULATOR_MODE_FAST;
return REGULATOR_MODE_NORMAL;
}
static struct regulator_ops mc13892_vcam_ops;
static int mc13892_regulator_probe(struct platform_device *pdev)
{
struct mc13xxx_regulator_priv *priv;
struct mc13xxx *mc13892 = dev_get_drvdata(pdev->dev.parent);
struct mc13xxx_regulator_platform_data *pdata =
dev_get_platdata(&pdev->dev);
struct mc13xxx_regulator_init_data *mc13xxx_data;
struct regulator_config config = { };
int i, ret;
int num_regulators = 0;
u32 val;
num_regulators = mc13xxx_get_num_regulators_dt(pdev);
if (num_regulators <= 0 && pdata)
num_regulators = pdata->num_regulators;
if (num_regulators <= 0)
return -EINVAL;
priv = devm_kzalloc(&pdev->dev,
struct_size(priv, regulators, num_regulators),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->num_regulators = num_regulators;
priv->mc13xxx_regulators = mc13892_regulators;
priv->mc13xxx = mc13892;
platform_set_drvdata(pdev, priv);
mc13xxx_lock(mc13892);
ret = mc13xxx_reg_read(mc13892, MC13892_REVISION, &val);
if (ret)
goto err_unlock;
/* enable switch auto mode (on 2.0A silicon only) */
if ((val & 0x0000FFFF) == 0x45d0) {
ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS4,
MC13892_SWITCHERS4_SW1MODE_M |
MC13892_SWITCHERS4_SW2MODE_M,
MC13892_SWITCHERS4_SW1MODE_AUTO |
MC13892_SWITCHERS4_SW2MODE_AUTO);
if (ret)
goto err_unlock;
ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS5,
MC13892_SWITCHERS5_SW3MODE_M |
MC13892_SWITCHERS5_SW4MODE_M,
MC13892_SWITCHERS5_SW3MODE_AUTO |
MC13892_SWITCHERS5_SW4MODE_AUTO);
if (ret)
goto err_unlock;
}
mc13xxx_unlock(mc13892);
/* update mc13892_vcam ops */
memcpy(&mc13892_vcam_ops, mc13892_regulators[MC13892_VCAM].desc.ops,
sizeof(struct regulator_ops));
mc13892_vcam_ops.set_mode = mc13892_vcam_set_mode,
mc13892_vcam_ops.get_mode = mc13892_vcam_get_mode,
mc13892_regulators[MC13892_VCAM].desc.ops = &mc13892_vcam_ops;
mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13892_regulators,
ARRAY_SIZE(mc13892_regulators));
for (i = 0; i < priv->num_regulators; i++) {
struct regulator_init_data *init_data;
struct regulator_desc *desc;
struct device_node *node = NULL;
int id;
if (mc13xxx_data) {
id = mc13xxx_data[i].id;
init_data = mc13xxx_data[i].init_data;
node = mc13xxx_data[i].node;
} else {
id = pdata->regulators[i].id;
init_data = pdata->regulators[i].init_data;
}
desc = &mc13892_regulators[id].desc;
config.dev = &pdev->dev;
config.init_data = init_data;
config.driver_data = priv;
config.of_node = node;
priv->regulators[i] = devm_regulator_register(&pdev->dev, desc,
&config);
if (IS_ERR(priv->regulators[i])) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
mc13892_regulators[i].desc.name);
return PTR_ERR(priv->regulators[i]);
}
}
return 0;
err_unlock:
mc13xxx_unlock(mc13892);
return ret;
}
static struct platform_driver mc13892_regulator_driver = {
.driver = {
.name = "mc13892-regulator",
},
.probe = mc13892_regulator_probe,
};
static int __init mc13892_regulator_init(void)
{
return platform_driver_register(&mc13892_regulator_driver);
}
subsys_initcall(mc13892_regulator_init);
static void __exit mc13892_regulator_exit(void)
{
platform_driver_unregister(&mc13892_regulator_driver);
}
module_exit(mc13892_regulator_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
MODULE_DESCRIPTION("Regulator Driver for Freescale MC13892 PMIC");
MODULE_ALIAS("platform:mc13892-regulator");
Reference in New Issue View Git Blame Copy Permalink