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Date: Mon, 1 Sep 2014 09:26:19 +0100
From: Lee Jones <lee.jones@...aro.org>
To: Beniamino Galvani <b.galvani@...il.com>
Cc: linux-kernel@...r.kernel.org, Samuel Ortiz <sameo@...ux.intel.com>,
Mark Brown <broonie@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Wim Van Sebroeck <wim@...ana.be>,
Guenter Roeck <linux@...ck-us.net>,
linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Grant Likely <grant.likely@...aro.org>,
Carlo Caione <carlo@...one.org>
Subject: Re: [PATCH v2 1/4] mfd: Add Ricoh RN5T618 PMIC core driver
On Sat, 30 Aug 2014, Beniamino Galvani wrote:
> Ricoh RN5T618 is a power management IC which integrates 3 step-down
> DCDC converters, 7 low-dropout regulators, a Li-ion battery charger,
> fuel gauge, ADC, GPIOs and a watchdog timer.
>
> This commit adds a MFD core driver to support the I2C communication
> with the device.
>
> Signed-off-by: Beniamino Galvani <b.galvani@...il.com>
> ---
> drivers/mfd/Kconfig | 11 +++
> drivers/mfd/Makefile | 1 +
> drivers/mfd/rn5t618.c | 134 +++++++++++++++++++++++++
> include/linux/mfd/rn5t618.h | 228 +++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 374 insertions(+)
> create mode 100644 drivers/mfd/rn5t618.c
> create mode 100644 include/linux/mfd/rn5t618.h
Applied, thanks.
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 8d5fad2..843da5d 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -582,6 +582,17 @@ config MFD_RC5T583
> Additional drivers must be enabled in order to use the
> different functionality of the device.
>
> +config MFD_RN5T618
> + tristate "Ricoh RN5T5618 PMIC"
> + depends on I2C
> + select MFD_CORE
> + select REGMAP_I2C
> + help
> + Say yes here to add support for the Ricoh RN5T618 PMIC. This
> + driver provides common support for accessing the device,
> + additional drivers must be enabled in order to use the
> + functionality of the device.
> +
> config MFD_SEC_CORE
> bool "SAMSUNG Electronics PMIC Series Support"
> depends on I2C=y
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index f001487..b945899 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -160,6 +160,7 @@ obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
> obj-$(CONFIG_MFD_PALMAS) += palmas.o
> obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o
> obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
> +obj-$(CONFIG_MFD_RN5T618) += rn5t618.o
> obj-$(CONFIG_MFD_SEC_CORE) += sec-core.o sec-irq.o
> obj-$(CONFIG_MFD_SYSCON) += syscon.o
> obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o
> diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
> new file mode 100644
> index 0000000..6668571
> --- /dev/null
> +++ b/drivers/mfd/rn5t618.c
> @@ -0,0 +1,134 @@
> +/*
> + * MFD core driver for Ricoh RN5T618 PMIC
> + *
> + * Copyright (C) 2014 Beniamino Galvani <b.galvani@...il.com>
> + *
> + * 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.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program. If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <linux/i2c.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/rn5t618.h>
> +#include <linux/module.h>
> +#include <linux/regmap.h>
> +
> +static const struct mfd_cell rn5t618_cells[] = {
> + { .name = "rn5t618-regulator" },
> + { .name = "rn5t618-wdt" },
> +};
> +
> +static bool rn5t618_volatile_reg(struct device *dev, unsigned int reg)
> +{
> + switch (reg) {
> + case RN5T618_WATCHDOGCNT:
> + case RN5T618_DCIRQ:
> + case RN5T618_ILIMDATAH ... RN5T618_AIN0DATAL:
> + case RN5T618_IR_ADC1 ... RN5T618_IR_ADC3:
> + case RN5T618_IR_GPR:
> + case RN5T618_IR_GPF:
> + case RN5T618_MON_IOIN:
> + case RN5T618_INTMON:
> + return true;
> + default:
> + return false;
> + }
> +}
> +
> +static const struct regmap_config rn5t618_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .volatile_reg = rn5t618_volatile_reg,
> + .max_register = RN5T618_MAX_REG,
> + .cache_type = REGCACHE_RBTREE,
> +};
> +
> +static struct rn5t618 *rn5t618_pm_power_off;
> +
> +static void rn5t618_power_off(void)
> +{
> + /* disable automatic repower-on */
> + regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_REPCNT,
> + RN5T618_REPCNT_REPWRON, 0);
> + /* start power-off sequence */
> + regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_SLPCNT,
> + RN5T618_SLPCNT_SWPWROFF, RN5T618_SLPCNT_SWPWROFF);
> +}
> +
> +static int rn5t618_i2c_probe(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> +{
> + struct rn5t618 *priv;
> + int ret;
> +
> + priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + i2c_set_clientdata(i2c, priv);
> +
> + priv->regmap = devm_regmap_init_i2c(i2c, &rn5t618_regmap_config);
> + if (IS_ERR(priv->regmap)) {
> + ret = PTR_ERR(priv->regmap);
> + dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
> + return ret;
> + }
> +
> + ret = mfd_add_devices(&i2c->dev, -1, rn5t618_cells,
> + ARRAY_SIZE(rn5t618_cells), NULL, 0, NULL);
> + if (ret) {
> + dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
> + return ret;
> + }
> +
> + if (!pm_power_off) {
> + rn5t618_pm_power_off = priv;
> + pm_power_off = rn5t618_power_off;
> + }
> +
> + return 0;
> +}
> +
> +static int rn5t618_i2c_remove(struct i2c_client *i2c)
> +{
> + struct rn5t618 *priv = i2c_get_clientdata(i2c);
> +
> + if (priv == rn5t618_pm_power_off) {
> + rn5t618_pm_power_off = NULL;
> + pm_power_off = NULL;
> + }
> +
> + mfd_remove_devices(&i2c->dev);
> + return 0;
> +}
> +
> +static const struct of_device_id rn5t618_of_match[] = {
> + { .compatible = "ricoh,rn5t618" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, rn5t618_of_match);
> +
> +static const struct i2c_device_id rn5t618_i2c_id[] = {
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, rn5t618_i2c_id);
> +
> +static struct i2c_driver rn5t618_i2c_driver = {
> + .driver = {
> + .name = "rn5t618",
> + .of_match_table = of_match_ptr(rn5t618_of_match),
> + },
> + .probe = rn5t618_i2c_probe,
> + .remove = rn5t618_i2c_remove,
> + .id_table = rn5t618_i2c_id,
> +};
> +
> +module_i2c_driver(rn5t618_i2c_driver);
> +
> +MODULE_AUTHOR("Beniamino Galvani <b.galvani@...il.com>");
> +MODULE_DESCRIPTION("Ricoh RN5T618 MFD driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h
> new file mode 100644
> index 0000000..c72d534
> --- /dev/null
> +++ b/include/linux/mfd/rn5t618.h
> @@ -0,0 +1,228 @@
> +/*
> + * MFD core driver for Ricoh RN5T618 PMIC
> + *
> + * Copyright (C) 2014 Beniamino Galvani <b.galvani@...il.com>
> + *
> + * 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.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program. If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifndef __LINUX_MFD_RN5T618_H
> +#define __LINUX_MFD_RN5T618_H
> +
> +#include <linux/regmap.h>
> +
> +#define RN5T618_LSIVER 0x00
> +#define RN5T618_OTPVER 0x01
> +#define RN5T618_IODAC 0x02
> +#define RN5T618_VINDAC 0x03
> +#define RN5T618_CPUCNT 0x06
> +#define RN5T618_PSWR 0x07
> +#define RN5T618_PONHIS 0x09
> +#define RN5T618_POFFHIS 0x0a
> +#define RN5T618_WATCHDOG 0x0b
> +#define RN5T618_WATCHDOGCNT 0x0c
> +#define RN5T618_PWRFUNC 0x0d
> +#define RN5T618_SLPCNT 0x0e
> +#define RN5T618_REPCNT 0x0f
> +#define RN5T618_PWRONTIMSET 0x10
> +#define RN5T618_NOETIMSETCNT 0x11
> +#define RN5T618_PWRIREN 0x12
> +#define RN5T618_PWRIRQ 0x13
> +#define RN5T618_PWRMON 0x14
> +#define RN5T618_PWRIRSEL 0x15
> +#define RN5T618_DC1_SLOT 0x16
> +#define RN5T618_DC2_SLOT 0x17
> +#define RN5T618_DC3_SLOT 0x18
> +#define RN5T618_LDO1_SLOT 0x1b
> +#define RN5T618_LDO2_SLOT 0x1c
> +#define RN5T618_LDO3_SLOT 0x1d
> +#define RN5T618_LDO4_SLOT 0x1e
> +#define RN5T618_LDO5_SLOT 0x1f
> +#define RN5T618_PSO0_SLOT 0x25
> +#define RN5T618_PSO1_SLOT 0x26
> +#define RN5T618_PSO2_SLOT 0x27
> +#define RN5T618_PSO3_SLOT 0x28
> +#define RN5T618_LDORTC1_SLOT 0x2a
> +#define RN5T618_DC1CTL 0x2c
> +#define RN5T618_DC1CTL2 0x2d
> +#define RN5T618_DC2CTL 0x2e
> +#define RN5T618_DC2CTL2 0x2f
> +#define RN5T618_DC3CTL 0x30
> +#define RN5T618_DC3CTL2 0x31
> +#define RN5T618_DC1DAC 0x36
> +#define RN5T618_DC2DAC 0x37
> +#define RN5T618_DC3DAC 0x38
> +#define RN5T618_DC1DAC_SLP 0x3b
> +#define RN5T618_DC2DAC_SLP 0x3c
> +#define RN5T618_DC3DAC_SLP 0x3d
> +#define RN5T618_DCIREN 0x40
> +#define RN5T618_DCIRQ 0x41
> +#define RN5T618_DCIRMON 0x42
> +#define RN5T618_LDOEN1 0x44
> +#define RN5T618_LDOEN2 0x45
> +#define RN5T618_LDODIS 0x46
> +#define RN5T618_LDO1DAC 0x4c
> +#define RN5T618_LDO2DAC 0x4d
> +#define RN5T618_LDO3DAC 0x4e
> +#define RN5T618_LDO4DAC 0x4f
> +#define RN5T618_LDO5DAC 0x50
> +#define RN5T618_LDORTCDAC 0x56
> +#define RN5T618_LDORTC2DAC 0x57
> +#define RN5T618_LDO1DAC_SLP 0x58
> +#define RN5T618_LDO2DAC_SLP 0x59
> +#define RN5T618_LDO3DAC_SLP 0x5a
> +#define RN5T618_LDO4DAC_SLP 0x5b
> +#define RN5T618_LDO5DAC_SLP 0x5c
> +#define RN5T618_ADCCNT1 0x64
> +#define RN5T618_ADCCNT2 0x65
> +#define RN5T618_ADCCNT3 0x66
> +#define RN5T618_ILIMDATAH 0x68
> +#define RN5T618_ILIMDATAL 0x69
> +#define RN5T618_VBATDATAH 0x6a
> +#define RN5T618_VBATDATAL 0x6b
> +#define RN5T618_VADPDATAH 0x6c
> +#define RN5T618_VADPDATAL 0x6d
> +#define RN5T618_VUSBDATAH 0x6e
> +#define RN5T618_VUSBDATAL 0x6f
> +#define RN5T618_VSYSDATAH 0x70
> +#define RN5T618_VSYSDATAL 0x71
> +#define RN5T618_VTHMDATAH 0x72
> +#define RN5T618_VTHMDATAL 0x73
> +#define RN5T618_AIN1DATAH 0x74
> +#define RN5T618_AIN1DATAL 0x75
> +#define RN5T618_AIN0DATAH 0x76
> +#define RN5T618_AIN0DATAL 0x77
> +#define RN5T618_ILIMTHL 0x78
> +#define RN5T618_ILIMTHH 0x79
> +#define RN5T618_VBATTHL 0x7a
> +#define RN5T618_VBATTHH 0x7b
> +#define RN5T618_VADPTHL 0x7c
> +#define RN5T618_VADPTHH 0x7d
> +#define RN5T618_VUSBTHL 0x7e
> +#define RN5T618_VUSBTHH 0x7f
> +#define RN5T618_VSYSTHL 0x80
> +#define RN5T618_VSYSTHH 0x81
> +#define RN5T618_VTHMTHL 0x82
> +#define RN5T618_VTHMTHH 0x83
> +#define RN5T618_AIN1THL 0x84
> +#define RN5T618_AIN1THH 0x85
> +#define RN5T618_AIN0THL 0x86
> +#define RN5T618_AIN0THH 0x87
> +#define RN5T618_EN_ADCIR1 0x88
> +#define RN5T618_EN_ADCIR2 0x89
> +#define RN5T618_EN_ADCIR3 0x8a
> +#define RN5T618_IR_ADC1 0x8c
> +#define RN5T618_IR_ADC2 0x8d
> +#define RN5T618_IR_ADC3 0x8e
> +#define RN5T618_IOSEL 0x90
> +#define RN5T618_IOOUT 0x91
> +#define RN5T618_GPEDGE1 0x92
> +#define RN5T618_GPEDGE2 0x93
> +#define RN5T618_EN_GPIR 0x94
> +#define RN5T618_IR_GPR 0x95
> +#define RN5T618_IR_GPF 0x96
> +#define RN5T618_MON_IOIN 0x97
> +#define RN5T618_GPLED_FUNC 0x98
> +#define RN5T618_INTPOL 0x9c
> +#define RN5T618_INTEN 0x9d
> +#define RN5T618_INTMON 0x9e
> +#define RN5T618_PREVINDAC 0xb0
> +#define RN5T618_BATDAC 0xb1
> +#define RN5T618_CHGCTL1 0xb3
> +#define RN5T618_CHGCTL2 0xb4
> +#define RN5T618_VSYSSET 0xb5
> +#define RN5T618_REGISET1 0xb6
> +#define RN5T618_REGISET2 0xb7
> +#define RN5T618_CHGISET 0xb8
> +#define RN5T618_TIMSET 0xb9
> +#define RN5T618_BATSET1 0xba
> +#define RN5T618_BATSET2 0xbb
> +#define RN5T618_DIESET 0xbc
> +#define RN5T618_CHGSTATE 0xbd
> +#define RN5T618_CHGCTRL_IRFMASK 0xbe
> +#define RN5T618_CHGSTAT_IRFMASK1 0xbf
> +#define RN5T618_CHGSTAT_IRFMASK2 0xc0
> +#define RN5T618_CHGERR_IRFMASK 0xc1
> +#define RN5T618_CHGCTRL_IRR 0xc2
> +#define RN5T618_CHGSTAT_IRR1 0xc3
> +#define RN5T618_CHGSTAT_IRR2 0xc4
> +#define RN5T618_CHGERR_IRR 0xc5
> +#define RN5T618_CHGCTRL_MONI 0xc6
> +#define RN5T618_CHGSTAT_MONI1 0xc7
> +#define RN5T618_CHGSTAT_MONI2 0xc8
> +#define RN5T618_CHGERR_MONI 0xc9
> +#define RN5T618_CHGCTRL_DETMOD1 0xca
> +#define RN5T618_CHGCTRL_DETMOD2 0xcb
> +#define RN5T618_CHGSTAT_DETMOD1 0xcc
> +#define RN5T618_CHGSTAT_DETMOD2 0xcd
> +#define RN5T618_CHGSTAT_DETMOD3 0xce
> +#define RN5T618_CHGERR_DETMOD1 0xcf
> +#define RN5T618_CHGERR_DETMOD2 0xd0
> +#define RN5T618_CHGOSCCTL 0xd4
> +#define RN5T618_CHGOSCSCORESET1 0xd5
> +#define RN5T618_CHGOSCSCORESET2 0xd6
> +#define RN5T618_CHGOSCSCORESET3 0xd7
> +#define RN5T618_CHGOSCFREQSET1 0xd8
> +#define RN5T618_CHGOSCFREQSET2 0xd9
> +#define RN5T618_CONTROL 0xe0
> +#define RN5T618_SOC 0xe1
> +#define RN5T618_RE_CAP_H 0xe2
> +#define RN5T618_RE_CAP_L 0xe3
> +#define RN5T618_FA_CAP_H 0xe4
> +#define RN5T618_FA_CAP_L 0xe5
> +#define RN5T618_AGE 0xe6
> +#define RN5T618_TT_EMPTY_H 0xe7
> +#define RN5T618_TT_EMPTY_L 0xe8
> +#define RN5T618_TT_FULL_H 0xe9
> +#define RN5T618_TT_FULL_L 0xea
> +#define RN5T618_VOLTAGE_1 0xeb
> +#define RN5T618_VOLTAGE_0 0xec
> +#define RN5T618_TEMP_1 0xed
> +#define RN5T618_TEMP_0 0xee
> +#define RN5T618_CC_CTRL 0xef
> +#define RN5T618_CC_COUNT2 0xf0
> +#define RN5T618_CC_COUNT1 0xf1
> +#define RN5T618_CC_COUNT0 0xf2
> +#define RN5T618_CC_SUMREG3 0xf3
> +#define RN5T618_CC_SUMREG2 0xf4
> +#define RN5T618_CC_SUMREG1 0xf5
> +#define RN5T618_CC_SUMREG0 0xf6
> +#define RN5T618_CC_OFFREG1 0xf7
> +#define RN5T618_CC_OFFREG0 0xf8
> +#define RN5T618_CC_GAINREG1 0xf9
> +#define RN5T618_CC_GAINREG0 0xfa
> +#define RN5T618_CC_AVEREG1 0xfb
> +#define RN5T618_CC_AVEREG0 0xfc
> +#define RN5T618_MAX_REG 0xfc
> +
> +#define RN5T618_REPCNT_REPWRON BIT(0)
> +#define RN5T618_SLPCNT_SWPWROFF BIT(0)
> +#define RN5T618_WATCHDOG_WDOGEN BIT(2)
> +#define RN5T618_WATCHDOG_WDOGTIM_M (BIT(0) | BIT(1))
> +#define RN5T618_WATCHDOG_WDOGTIM_S 0
> +#define RN5T618_PWRIRQ_IR_WDOG BIT(6)
> +
> +enum {
> + RN5T618_DCDC1,
> + RN5T618_DCDC2,
> + RN5T618_DCDC3,
> + RN5T618_LDO1,
> + RN5T618_LDO2,
> + RN5T618_LDO3,
> + RN5T618_LDO4,
> + RN5T618_LDO5,
> + RN5T618_LDORTC1,
> + RN5T618_LDORTC2,
> + RN5T618_REG_NUM,
> +};
> +
> +struct rn5t618 {
> + struct regmap *regmap;
> +};
> +
> +#endif /* __LINUX_MFD_RN5T618_H */
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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