[PATCH] support PMIC mc13892
Uwe Kleine-König
u.kleine-koenig at pengutronix.de
Mon Dec 6 02:22:37 EST 2010
Hello,
On Mon, Dec 06, 2010 at 02:25:35PM +0800, yong.shen at freescale.com wrote:
> From: Yong Shen <yong.shen at linaro.org>
>
> add support for mc13892, tested on mx51 babbage board
>
> Signed-off-by: Yong Shen <yong.shen at linaro.org>
> ---
> drivers/mfd/Kconfig | 4 +
> drivers/regulator/Kconfig | 8 +
> drivers/regulator/Makefile | 1 +
> drivers/regulator/mc13892-regulator.c | 647 +++++++++++++++++++++++++++++++++
> include/linux/mfd/mc13892.h | 38 ++
> 5 files changed, 698 insertions(+), 0 deletions(-)
> create mode 100644 drivers/regulator/mc13892-regulator.c
> create mode 100644 include/linux/mfd/mc13892.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 3a1493b..7659af9 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -427,11 +427,15 @@ config MFD_PCF50633
> config MFD_MC13783
> tristate
>
> +config MFD_MC13892
> + tristate
> +
This is not needed, MFD_MC13783 only exists because when MFD_MC13XXX was
introduced some drivers still depended on MFD_MC13783. As mc13xxx.[ch]
provided enough compatibility cruft MFD_MC13XXX just selected MFD_MC13783.
> config MFD_MC13XXX
> tristate "Support Freescale MC13783 and MC13892"
> depends on SPI_MASTER
> select MFD_CORE
> select MFD_MC13783
> + select MFD_MC13892
> help
> Support for the Freescale (Atlas) PMIC and audio CODECs
> MC13783 and MC13892.
> diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
> index 6e54253..7f7bc22 100644
> --- a/drivers/regulator/Kconfig
> +++ b/drivers/regulator/Kconfig
> @@ -197,6 +197,14 @@ config REGULATOR_MC13783
> Say y here to support the regulators found on the Freescale MC13783
> PMIC.
>
> +config REGULATOR_MC13892
> + tristate "Support regulators on Freescale MC13892 PMIC"
> + depends on MFD_MC13892
> + select REGULATOR_MC13XXX_CORE
> + help
> + Say y here to support the regulators found on the Freescale MC13892
> + PMIC.
> +
> config REGULATOR_AB3100
> tristate "ST-Ericsson AB3100 Regulator functions"
> depends on AB3100_CORE
> diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
> index 11876be..3107480 100644
> --- a/drivers/regulator/Makefile
> +++ b/drivers/regulator/Makefile
> @@ -30,6 +30,7 @@ obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
> obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
> obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
> obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
> +obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
> obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
> obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
>
> diff --git a/drivers/regulator/mc13892-regulator.c b/drivers/regulator/mc13892-regulator.c
> new file mode 100644
> index 0000000..6e613d4
> --- /dev/null
> +++ b/drivers/regulator/mc13892-regulator.c
> @@ -0,0 +1,647 @@
> +/*
> + * Regulator Driver for Freescale MC13892 PMIC
> + *
> + * Copyright 2010 Yong Shen <yong.shen at linaro.org>
> + *
> + * Based on draft driver from Arnaud Patard <arnaud.patard at rtp-net.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#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 "mc13xxx.h"
shouldn't that be
#include <linux/mfd/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 int mc13892_vcoincell[] = {
> + 2500000, 2700000, 2800000, 2900000, 3000000, 3100000,
> + 3200000, 3300000,
> +};
> +
> +static const 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
> +};
> +
> +static const 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 int mc13892_swbst[] = {
> + 5000000,
> +};
> +
> +static const int mc13892_viohi[] = {
> + 2775000,
> +};
> +
> +static const int mc13892_vpll[] = {
> + 1050000, 1250000, 1650000, 1800000,
> +};
> +
> +static const int mc13892_vdig[] = {
> + 1050000, 1250000, 1650000, 1800000,
> +};
> +
> +static const int mc13892_vsd[] = {
> + 1800000, 2000000, 2600000, 2700000,
> + 2800000, 2900000, 3000000, 3150000,
> +};
> +
> +static const int mc13892_vusb2[] = {
> + 2400000, 2600000, 2700000, 2775000,
> +};
> +
> +static const int mc13892_vvideo[] = {
> + 2500000, 2600000, 270000, 2775000,
> +};
> +
> +static const int mc13892_vaudio[] = {
> + 2300000, 2500000, 2775000, 3000000,
> +};
> +
> +static const int mc13892_vcam[] = {
> + 2500000, 2600000, 2750000, 3000000,
> +};
> +
> +static const int mc13892_vgen1[] = {
> + 1200000, 1500000, 2775000, 3150000,
> +};
> +
> +static const int mc13892_vgen2[] = {
> + 1200000, 1500000, 1600000, 1800000,
> + 2700000, 2800000, 3000000, 3150000,
> +};
> +
> +static const int mc13892_vgen3[] = {
> + 1800000, 2900000,
> +};
> +
> +static const int mc13892_vusb[] = {
> + 3300000,
> +};
> +
> +static const int mc13892_gpo[] = {
> + 2750000,
> +};
> +
> +static const int mc13892_pwgtdrv[] = {
> + 5000000,
> +};
> +
> +static struct regulator_ops mc13892_gpo_regulator_ops;
> +/* sw regulators need special care due to the "hi bit" */
> +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),
> +};
> +
> +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);
> +
> + ret = mc13xxx_reg_read(mc13892, MC13892_POWERMISC, &valread);
> + if (ret)
> + return ret;
> +
> + /* 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;
> +
> + return mc13xxx_reg_write(mc13892, MC13892_POWERMISC, valread);
> +}
> +
> +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);
> + int ret;
> + 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;
> +
> + mc13xxx_lock(priv->mc13xxx);
> + ret = mc13892_powermisc_rmw(priv, mask, en_val);
> + mc13xxx_unlock(priv->mc13xxx);
> +
> + return ret;
> +}
> +
> +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);
> + int ret;
> + 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;
> +
> + mc13xxx_lock(priv->mc13xxx);
> + ret = mc13892_powermisc_rmw(priv, mc13892_regulators[id].enable_bit,
> + dis_val);
> + mc13xxx_unlock(priv->mc13xxx);
> +
> + return ret;
> +}
> +
> +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 = mc13xxx_regulator_list_voltage,
> + .set_voltage = mc13xxx_fixed_regulator_set_voltage,
> + .get_voltage = mc13xxx_fixed_regulator_get_voltage,
> +};
> +
> +static int mc13892_sw_regulator_get_voltage(struct regulator_dev *rdev)
> +{
> + struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
> + int ret, id = rdev_get_id(rdev);
> + unsigned int val, hi;
> +
> + 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;
> +
> + hi = val & MC13892_SWITCHERS0_SWxHI;
> + val = (val & mc13892_regulators[id].vsel_mask)
> + >> mc13892_regulators[id].vsel_shift;
> +
> + dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
> +
> + if (hi)
> + val = (25000 * val) + 1100000;
> + else
> + val = (25000 * val) + 600000;
> +
> + return val;
> +}
> +
> +static int mc13892_sw_regulator_set_voltage(struct regulator_dev *rdev,
> + int min_uV, int max_uV)
> +{
> + struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
> + int hi, value, val, mask, id = rdev_get_id(rdev);
> + int ret;
> +
> + dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
> + __func__, id, min_uV, max_uV);
> +
> + /* Find the best index */
> + value = mc13xxx_get_best_voltage_index(rdev, min_uV, max_uV);
> + dev_dbg(rdev_get_dev(rdev), "%s best value: %d\n", __func__, value);
> + if (value < 0)
> + return value;
> +
> + value = mc13892_regulators[id].voltages[value];
> +
> + mc13xxx_lock(priv->mc13xxx);
> + ret = mc13xxx_reg_read(priv->mc13xxx,
> + mc13892_regulators[id].vsel_reg, &val);
> + mc13xxx_unlock(priv->mc13xxx);
> + if (ret)
> + return ret;
> +
> + hi = val & MC13892_SWITCHERS0_SWxHI;
> + if (value > 1375)
> + hi = 1;
> + if (value < 1100)
> + hi = 0;
> +
> + if (hi) {
> + value = (value - 1100000) / 25000;
> + value |= MC13892_SWITCHERS0_SWxHI;
> + } else
> + value = (value - 600000) / 25000;
> +
> + mask = mc13892_regulators[id].vsel_mask | MC13892_SWITCHERS0_SWxHI;
> + mc13xxx_lock(priv->mc13xxx);
> + ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].vsel_reg,
> + mask,
> + value << mc13892_regulators[id].vsel_shift);
> + mc13xxx_unlock(priv->mc13xxx);
> +
> + return ret;
> +}
> +
> +static struct regulator_ops mc13892_sw_regulator_ops = {
> + .is_enabled = mc13xxx_sw_regulator_is_enabled,
> + .list_voltage = mc13xxx_regulator_list_voltage,
> + .set_voltage = mc13892_sw_regulator_set_voltage,
> + .get_voltage = mc13892_sw_regulator_get_voltage,
> +};
> +
> +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;
> +}
> +
> +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 int __devinit 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 *init_data;
> + int i, ret;
> + u32 val;
> +
> + priv = kzalloc(sizeof(*priv) +
> + pdata->num_regulators * sizeof(priv->regulators[0]),
> + GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->mc13xxx_regulators = mc13892_regulators;
> + priv->mc13xxx = mc13892;
> +
> + mc13xxx_lock(mc13892);
> + ret = mc13xxx_reg_read(mc13892, MC13892_REVISION, &val);
> + mc13xxx_unlock(mc13892);
> + if (ret)
> + goto err_alloc;
err_alloc looks wrong
> +
> + /* enable switch auto mode - ENGR00120510, ENGR00121057 */
> + /* no doc with regs description means no way to know if */
> + /* there's a better way to do it */
This is an unusual commenting style. Please use
/*
* enable switch auto mode ...
*/
> + if ((val & 0x0000FFFF) == 0x45d0) {
> + mc13xxx_lock(mc13892);
> + ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS4,
> + MC13892_SWITCHERS4_SW1MODE_M |
> + MC13892_SWITCHERS4_SW2MODE_M,
> + MC13892_SWITCHERS4_SW1MODE_AUTO |
> + MC13892_SWITCHERS4_SW2MODE_AUTO);
> + mc13xxx_unlock(mc13892);
It should be possible to hold the lock for longer that a single mc13xxx
API call. Your error handler just needs to unlock for that.
> + if (ret)
> + goto err_alloc;
> +
> + mc13xxx_lock(mc13892);
> + mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS5,
> + MC13892_SWITCHERS5_SW3MODE_M |
> + MC13892_SWITCHERS5_SW4MODE_M,
> + MC13892_SWITCHERS5_SW3MODE_AUTO |
> + MC13892_SWITCHERS5_SW4MODE_AUTO);
> + mc13xxx_unlock(mc13892);
> + if (ret)
> + goto err_alloc;
> + }
> +
> + mc13892_regulators[MC13892_VCAM].desc.ops->set_mode
> + = mc13892_vcam_set_mode;
> + mc13892_regulators[MC13892_VCAM].desc.ops->get_mode
> + = mc13892_vcam_get_mode;
> + for (i = 0; i < pdata->num_regulators; i++) {
> + init_data = &pdata->regulators[i];
> + priv->regulators[i] = regulator_register(
> + &mc13892_regulators[init_data->id].desc,
> + &pdev->dev, init_data->init_data, priv);
> +
> + if (IS_ERR(priv->regulators[i])) {
> + dev_err(&pdev->dev, "failed to register regulator %s\n",
> + mc13892_regulators[i].desc.name);
> + ret = PTR_ERR(priv->regulators[i]);
> + goto err;
> + }
> + }
> +
> + platform_set_drvdata(pdev, priv);
> +
> + return 0;
> +err:
> + while (--i >= 0)
> + regulator_unregister(priv->regulators[i]);
> +
> +err_alloc:
> + kfree(priv);
> +
> + return ret;
> +}
> +
> +static int __devexit mc13892_regulator_remove(struct platform_device *pdev)
> +{
> + struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
> + struct mc13xxx_regulator_platform_data *pdata =
> + dev_get_platdata(&pdev->dev);
> + int i;
> +
> + platform_set_drvdata(pdev, NULL);
> +
> + for (i = 0; i < pdata->num_regulators; i++)
> + regulator_unregister(priv->regulators[i]);
> +
> + kfree(priv);
> + return 0;
> +}
> +
> +static struct platform_driver mc13892_regulator_driver = {
> + .driver = {
> + .name = "mc13892-regulator",
> + .owner = THIS_MODULE,
> + },
> + .remove = __devexit_p(mc13892_regulator_remove),
> + .probe = mc13892_regulator_probe,
If you ask me just use a single space before =, but there is no common
style visible in the kernel, so do as you prefer.
(The advantage of using a single space is that if later
.averylongmembername needs to be initialized you either have to fix
lines that are technically unrelated or the indention isn't uniform.)
Best regards
Uwe
> +};
> +
> +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 at linaro.org>");
> +MODULE_DESCRIPTION("Regulator Driver for Freescale MC13892 PMIC");
> +MODULE_ALIAS("platform:mc13892-regulator");
> diff --git a/include/linux/mfd/mc13892.h b/include/linux/mfd/mc13892.h
> new file mode 100644
> index 0000000..7df13e8
> --- /dev/null
> +++ b/include/linux/mfd/mc13892.h
> @@ -0,0 +1,38 @@
> +/*
> + * Copyright 2010 Yong Shen <yong.shen at linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify it under
> + * the terms of the GNU General Public License version 2 as published by the
> + * Free Software Foundation.
> + */
> +
> +#ifndef __LINUX_MFD_MC13892_H
> +#define __LINUX_MFD_MC13892_H
> +#include <linux/mfd/mc13xxx.h>
> +
> +#define MC13892_SW1 0
> +#define MC13892_SW2 1
> +#define MC13892_SW3 2
> +#define MC13892_SW4 3
> +#define MC13892_SWBST 4
> +#define MC13892_VIOHI 5
> +#define MC13892_VPLL 6
> +#define MC13892_VDIG 7
> +#define MC13892_VSD 8
> +#define MC13892_VUSB2 9
> +#define MC13892_VVIDEO 10
> +#define MC13892_VAUDIO 11
> +#define MC13892_VCAM 12
> +#define MC13892_VGEN1 13
> +#define MC13892_VGEN2 14
> +#define MC13892_VGEN3 15
> +#define MC13892_VUSB 16
> +#define MC13892_GPO1 17
> +#define MC13892_GPO2 18
> +#define MC13892_GPO3 19
> +#define MC13892_GPO4 20
> +#define MC13892_PWGT1SPI 21
> +#define MC13892_PWGT2SPI 22
> +#define MC13892_VCOINCELL 23
> +
> +#endif
> --
> 1.7.0.4
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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