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Message-ID: <20140520135844.GP24991@lee--X1>
Date: Tue, 20 May 2014 14:58:44 +0100
From: Lee Jones <lee.jones@...aro.org>
To: Keerthy <j-keerthy@...com>
Cc: devicetree@...r.kernel.org, robh+dt@...nel.org,
mark.rutland@....com, sameo@...ux.intel.com,
grant.likely@...aro.org, ian@...mlogic.co.uk,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
broonie@...aro.org, swarren@...dia.com, linux-omap@...r.kernel.org
Subject: Re: [PATCH v2 3/4] mfd: tps65917: Add driver for the TPS65917 PMIC
> The TPS65917 chip is a power management IC for Portable Navigation Systems
> and Tablet Computing devices. It contains the following components:
>
> - Regulators.
> - Over Temperature warning and Shut down.
>
> This patch adds support for tps65917 mfd device. At this time only
> the regulator functionality is made available.
>
> Signed-off-by: Keerthy <j-keerthy@...com>
> ---
> Changes in V2:
>
> Added volatile register check as some of the registers
> in the set are volatile.
>
> drivers/mfd/Kconfig | 12 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/tps65917.c | 573 ++++++++++++++++
We have quite the collection of tps* files now in MFD. How different
are they really? Is consolidation possible?
> include/linux/mfd/tps65917.h | 1509 ++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 2095 insertions(+)
> create mode 100644 drivers/mfd/tps65917.c
> create mode 100644 include/linux/mfd/tps65917.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 3383412..ac73e58 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -925,6 +925,18 @@ config MFD_TPS65912_SPI
> If you say yes here you get support for the TPS65912 series of
> PM chips with SPI interface.
>
> +config MFD_TPS65917
> + bool "TI TPS65917 series chips"
> + select MFD_CORE
> + select REGMAP_I2C
> + select REGMAP_IRQ
> + depends on I2C=y
> + help
> + If you say yes here you get support for the TPS65917
> + PMIC chips from Texas Instruments. The device provides
> + 5 confgurable SPMSs and 5 LDOs, thermal protection module,
> + GPADC.
> +
> config MFD_TPS80031
> bool "TI TPS80031/TPS80032 Power Management chips"
> depends on I2C=y
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 2851275..248a60b 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -69,6 +69,7 @@ tps65912-objs := tps65912-core.o tps65912-irq.o
> obj-$(CONFIG_MFD_TPS65912) += tps65912.o
> obj-$(CONFIG_MFD_TPS65912_I2C) += tps65912-i2c.o
> obj-$(CONFIG_MFD_TPS65912_SPI) += tps65912-spi.o
> +obj-$(CONFIG_MFD_TPS65917) += tps65917.o
> obj-$(CONFIG_MFD_TPS80031) += tps80031.o
> obj-$(CONFIG_MENELAUS) += menelaus.o
>
> diff --git a/drivers/mfd/tps65917.c b/drivers/mfd/tps65917.c
> new file mode 100644
> index 0000000..dbd67c5
> --- /dev/null
> +++ b/drivers/mfd/tps65917.c
> @@ -0,0 +1,573 @@
> +/*
> + * TI TPS65917 Integrated power management chipsets
> + *
> + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.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.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether expressed or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License version 2 for more details.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/moduleparam.h>
> +#include <linux/init.h>
> +#include <linux/slab.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/irq.h>
> +#include <linux/regmap.h>
> +#include <linux/err.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/tps65917.h>
> +#include <linux/of_device.h>
> +
> +#define TPS65917_EXT_REQ (TPS65917_EXT_CONTROL_ENABLE1 | \
> + TPS65917_EXT_CONTROL_ENABLE2 | \
> + TPS65917_EXT_CONTROL_NSLEEP)
> +
> +struct tps65917_sleep_requestor_info {
> + int id;
> + int reg_offset;
> + int bit_pos;
> +};
> +
> +#define EXTERNAL_REQUESTOR(_id, _offset, _pos) \
> + [TPS65917_EXTERNAL_REQSTR_ID_##_id] = { \
> + .id = TPS65917_EXTERNAL_REQSTR_ID_##_id, \
> + .reg_offset = _offset, \
> + .bit_pos = _pos, \
> + }
> +
> +static struct tps65917_sleep_requestor_info sleep_req_info[] = {
> + EXTERNAL_REQUESTOR(REGEN1, 0, 0),
> + EXTERNAL_REQUESTOR(REGEN2, 0, 1),
> + EXTERNAL_REQUESTOR(REGEN3, 0, 6),
> + EXTERNAL_REQUESTOR(SMPS1, 1, 0),
> + EXTERNAL_REQUESTOR(SMPS2, 1, 1),
> + EXTERNAL_REQUESTOR(SMPS3, 1, 2),
> + EXTERNAL_REQUESTOR(SMPS4, 1, 3),
> + EXTERNAL_REQUESTOR(SMPS5, 1, 4),
> + EXTERNAL_REQUESTOR(LDO1, 2, 0),
> + EXTERNAL_REQUESTOR(LDO2, 2, 1),
> + EXTERNAL_REQUESTOR(LDO3, 2, 2),
> + EXTERNAL_REQUESTOR(LDO4, 2, 3),
> + EXTERNAL_REQUESTOR(LDO5, 2, 4),
> +};
> +
> +static int tps65917_voltaile_regs[] = {
> + TPS65917_SMPS1_CTRL,
> + TPS65917_SMPS2_CTRL,
> + TPS65917_SMPS3_CTRL,
> + TPS65917_SMPS4_CTRL,
> + TPS65917_SMPS5_CTRL,
> + TPS65917_LDO1_CTRL,
> + TPS65917_LDO2_CTRL,
> + TPS65917_LDO3_CTRL,
> + TPS65917_LDO4_CTRL,
> + TPS65917_LDO5_CTRL,
> +};
> +
> +static bool is_volatile_reg(struct device *dev, unsigned int reg)
> +{
> + int i;
> +
> + /*
> + * Caching all the required regulator registers.
> + */
> +
> + for (i = 0; i < 11; i++)
Are you sure? Looks like 10 to me.
Use ARRAY_SIZE(tps65917_voltaile_regs) instead
> + if (reg == tps65917_voltaile_regs[i])
> + return true;
> +
> + return false;
> +}
[...]
> +int tps65917_ext_control_req_config(struct tps65917 *tps65917,
> + enum tps65917_external_requestor_id id,
> + int ext_ctrl, bool enable)
> +{
> + int preq_mask_bit = 0;
> + int reg_add = 0;
> + int bit_pos;
> + int ret;
> +
> + if (!(ext_ctrl & TPS65917_EXT_REQ))
> + return 0;
> +
> + if (id >= TPS65917_EXTERNAL_REQSTR_ID_MAX)
> + return 0;
> +
> + if (ext_ctrl & TPS65917_EXT_CONTROL_NSLEEP) {
> + reg_add = TPS65917_NSLEEP_RES_ASSIGN;
> + preq_mask_bit = 0;
> + } else if (ext_ctrl & TPS65917_EXT_CONTROL_ENABLE1) {
> + reg_add = TPS65917_ENABLE1_RES_ASSIGN;
> + preq_mask_bit = 1;
> + } else if (ext_ctrl & TPS65917_EXT_CONTROL_ENABLE2) {
> + reg_add = TPS65917_ENABLE2_RES_ASSIGN;
> + preq_mask_bit = 2;
> + }
> +
> + bit_pos = sleep_req_info[id].bit_pos;
> + reg_add += sleep_req_info[id].reg_offset;
New line here.
> + if (enable)
> + ret = tps65917_update_bits(tps65917, TPS65917_RESOURCE_BASE,
> + reg_add, BIT(bit_pos), BIT(bit_pos));
> + else
> + ret = tps65917_update_bits(tps65917, TPS65917_RESOURCE_BASE,
> + reg_add, BIT(bit_pos), 0);
Would prefer:
ret = tps65917_update_bits(tps65917, TPS65917_RESOURCE_BASE,
reg_add, BIT(bit_pos),
enable ? BIT(bit_pos) : 0);
> + if (ret < 0) {
> + dev_err(tps65917->dev, "Resource reg 0x%02x update failed %d\n",
> + reg_add, ret);
> + return ret;
> + }
> +
> + /* Unmask the PREQ */
> + ret = tps65917_update_bits(tps65917, TPS65917_PMU_CONTROL_BASE,
> + TPS65917_POWER_CTRL, BIT(preq_mask_bit), 0);
> + if (ret < 0) {
> + dev_err(tps65917->dev, "POWER_CTRL register update failed %d\n",
> + ret);
> + return ret;
> + }
> + return ret;
Just display the error - the function returns 'ret' regardless.
> +}
> +EXPORT_SYMBOL_GPL(tps65917_ext_control_req_config);
> +
> +static int tps65917_set_pdata_irq_flag(struct i2c_client *i2c,
> + struct tps65917_platform_data *pdata)
> +{
> + struct irq_data *irq_data = irq_get_irq_data(i2c->irq);
New line here.
> + if (!irq_data) {
> + dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
> + return -EINVAL;
> + }
> +
> + pdata->irq_flags = irqd_get_trigger_type(irq_data);
> + dev_info(&i2c->dev, "Irq flag is 0x%08x\n", pdata->irq_flags);
Is this line really required?
New line here.
> + return 0;
> +}
> +
> +static void tps65917_dt_to_pdata(struct i2c_client *i2c,
> + struct tps65917_platform_data *pdata)
> +{
> + struct device_node *node = i2c->dev.of_node;
What kind of node?
Personally, I'd prefer the use of 'np' as a variable name.
> + int ret;
> + u32 prop;
> +
> + ret = of_property_read_u32(node, "ti,mux-pad1", &prop);
> + if (!ret) {
> + pdata->mux_from_pdata = 1;
This should be a bool.
> + pdata->pad1 = prop;
> + }
> +
> + ret = of_property_read_u32(node, "ti,mux-pad2", &prop);
> + if (!ret) {
> + pdata->mux_from_pdata = 1;
As above.
> + pdata->pad2 = prop;
> + }
> +
> + /* The default for this register is all masked */
> + ret = of_property_read_u32(node, "ti,power-ctrl", &prop);
> + if (!ret)
> + pdata->power_ctrl = prop;
> + else
> + pdata->power_ctrl = TPS65917_POWER_CTRL_NSLEEP_MASK |
> + TPS65917_POWER_CTRL_ENABLE1_MASK |
> + TPS65917_POWER_CTRL_ENABLE2_MASK;
> + if (i2c->irq)
> + tps65917_set_pdata_irq_flag(i2c, pdata);
What's the point of tps65917_set_pdata_irq_flag() providing a return
value and then not checking it?
> + pdata->pm_off = of_property_read_bool(node,
> + "ti,system-power-controller");
> +}
> +
> +static struct tps65917 *tps65917_dev;
This is never used.
> +static const struct of_device_id of_tps65917_match_tbl[] = {
> + {
> + .compatible = "ti,tps65917",
> + },
This can all sit on one line.
> + { },
> +};
> +MODULE_DEVICE_TABLE(of, of_tps65917_match_tbl);
> +
> +static int tps65917_i2c_probe(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> +{
> + struct tps65917 *tps65917;
> + struct tps65917_platform_data *pdata;
> + struct device_node *node = i2c->dev.of_node;
> + int ret = 0, i;
Break these into separate declarations.
Nit: Put them with the other int declaration(s).
> + unsigned int reg, addr, *features;
> + int slave;
> + const struct of_device_id *match;
> +
> + pdata = dev_get_platdata(&i2c->dev);
> +
> + if (node && !pdata) {
> + pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
> +
Remove this line.
> + if (!pdata)
> + return -ENOMEM;
> +
> + tps65917_dt_to_pdata(i2c, pdata);
I'm sure we can fail here.
> + }
> +
> + if (!pdata)
> + return -EINVAL;
> +
> + tps65917 = devm_kzalloc(&i2c->dev, sizeof(struct tps65917), GFP_KERNEL);
> + if (tps65917 == NULL)
if (!tps65917)
> + return -ENOMEM;
> +
> + i2c_set_clientdata(i2c, tps65917);
Do this at the end after a clean start-up.
> + tps65917->dev = &i2c->dev;
> + tps65917->irq = i2c->irq;
Or just save i2c.
> + match = of_match_device(of_tps65917_match_tbl, &i2c->dev);
> +
Remove this line.
> + if (!match)
> + return -ENODATA;
> +
> + features = (unsigned int *)match->data;
This will be NULL, please remove it.
In fact, why are you even checking for a match?
You only support one device.
> + for (i = 0; i < TPS65917_NUM_CLIENTS; i++) {
> + if (i == 0) {
> + tps65917->i2c_clients[i] = i2c;
> + } else {
> + tps65917->i2c_clients[i] =
> + i2c_new_dummy(i2c->adapter,
> + i2c->addr + i);
> + if (!tps65917->i2c_clients[i]) {
> + dev_err(tps65917->dev,
> + "can't attach client %d\n", i);
> + ret = -ENOMEM;
> + goto err_i2c;
> + }
> + tps65917->i2c_clients[i]->dev.of_node = of_node_get(node);
> + }
New line here.
> + tps65917->regmap[i] = devm_regmap_init_i2c(tps65917->i2c_clients[i],
> + &tps65917_regmap_config[i]);
> + if (IS_ERR(tps65917->regmap[i])) {
> + ret = PTR_ERR(tps65917->regmap[i]);
> + dev_err(tps65917->dev,
> + "Failed to allocate regmap %d, err: %d\n",
> + i, ret);
> + goto err_i2c;
> + }
> + }
> +
> + if (!tps65917->irq) {
> + dev_warn(tps65917->dev, "IRQ missing: skipping irq request\n");
> + goto no_irq;
> + }
> +
> + /* Change interrupt line output polarity */
> + if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH)
> + reg = TPS65917_POLARITY_CTRL_INT_POLARITY;
> + else
> + reg = 0;
> + ret = tps65917_update_bits(tps65917, TPS65917_PU_PD_OD_BASE,
> + TPS65917_POLARITY_CTRL,
> + TPS65917_POLARITY_CTRL_INT_POLARITY, reg);
Do you need to do this if reg == 0?
> + if (ret < 0) {
> + dev_err(tps65917->dev, "POLARITY_CTRL updat failed: %d\n", ret);
> + goto err_i2c;
> + }
> +
> + /* Change IRQ into clear on read mode for efficiency */
> + slave = TPS65917_BASE_TO_SLAVE(TPS65917_INTERRUPT_BASE);
> + addr = TPS65917_BASE_TO_REG(TPS65917_INTERRUPT_BASE, TPS65917_INT_CTRL);
> + reg = TPS65917_INT_CTRL_INT_CLEAR;
> +
> + regmap_write(tps65917->regmap[slave], addr, reg);
> +
> + ret = regmap_add_irq_chip(tps65917->regmap[slave], tps65917->irq,
> + IRQF_ONESHOT | pdata->irq_flags, 0,
> + &tps65917_irq_chip,
> + &tps65917->irq_data);
> + if (ret < 0)
> + goto err_i2c;
> +
> +no_irq:
> + slave = TPS65917_BASE_TO_SLAVE(TPS65917_PU_PD_OD_BASE);
> + addr = TPS65917_BASE_TO_REG(TPS65917_PU_PD_OD_BASE,
> + TPS65917_PRIMARY_SECONDARY_PAD1);
> +
> + if (pdata->mux_from_pdata) {
> + reg = pdata->pad1;
> + ret = regmap_write(tps65917->regmap[slave], addr, reg);
> + if (ret)
> + goto err_irq;
> + } else {
> + ret = regmap_read(tps65917->regmap[slave], addr, ®);
> + if (ret)
> + goto err_irq;
> + }
Comment this to let us know what you're trying to do.
> + addr = TPS65917_BASE_TO_REG(TPS65917_PU_PD_OD_BASE,
> + TPS65917_PRIMARY_SECONDARY_PAD2);
> +
> + if (pdata->mux_from_pdata) {
> + reg = pdata->pad2;
> + ret = regmap_write(tps65917->regmap[slave], addr, reg);
> + if (ret)
> + goto err_irq;
> + } else {
> + ret = regmap_read(tps65917->regmap[slave], addr, ®);
> + if (ret)
> + goto err_irq;
> + }
Same here.
> + reg = pdata->power_ctrl;
> +
> + slave = TPS65917_BASE_TO_SLAVE(TPS65917_PMU_CONTROL_BASE);
> + addr = TPS65917_BASE_TO_REG(TPS65917_PMU_CONTROL_BASE,
> + TPS65917_POWER_CTRL);
> +
> + ret = regmap_write(tps65917->regmap[slave], addr, reg);
> + if (ret)
> + goto err_irq;
And here.
> + /*
> + * If we are probing with DT do this the DT way and return here
> + * otherwise continue and add devices using mfd helpers.
MFD
> + */
> + if (node) {
> + ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
What is it you're registering here? I don't see any child devices
anywhere.
> + if (ret < 0)
> + goto err_irq;
> + else if (pdata->pm_off && !pm_power_off)
No need for the else.
> + tps65917_dev = tps65917;
What does this do?
> + }
> +
> + return ret;
Where does it continue and add devices using the MFD helpers?
> +err_irq:
> + regmap_del_irq_chip(tps65917->irq, tps65917->irq_data);
> +err_i2c:
> + for (i = 1; i < TPS65917_NUM_CLIENTS; i++) {
> + if (tps65917->i2c_clients[i])
> + i2c_unregister_device(tps65917->i2c_clients[i]);
> + }
New line here.
> + return ret;
> +}
> +
> +static int tps65917_i2c_remove(struct i2c_client *i2c)
> +{
> + struct tps65917 *tps65917 = i2c_get_clientdata(i2c);
> + int i;
> +
> + regmap_del_irq_chip(tps65917->irq, tps65917->irq_data);
> +
> + for (i = 1; i < TPS65917_NUM_CLIENTS; i++) {
> + if (tps65917->i2c_clients[i])
> + i2c_unregister_device(tps65917->i2c_clients[i]);
> + }
> +
> + return 0;
> +}
> +
> +static const struct i2c_device_id tps65917_i2c_id[] = {
> + { "tps65917", },
> +};
> +MODULE_DEVICE_TABLE(i2c, tps65917_i2c_id);
> +
> +static struct i2c_driver tps65917_i2c_driver = {
> + .driver = {
> + .name = "tps65917",
> + .of_match_table = of_tps65917_match_tbl,
of_match_ptr()
> + .owner = THIS_MODULE,
> + },
> + .probe = tps65917_i2c_probe,
> + .remove = tps65917_i2c_remove,
> + .id_table = tps65917_i2c_id,
> +};
> +
> +static int __init tps65917_i2c_init(void)
> +{
> + return i2c_add_driver(&tps65917_i2c_driver);
> +}
> +/* init early so consumer devices can complete system boot */
Defer?
> +subsys_initcall(tps65917_i2c_init);
> +
> +static void __exit tps65917_i2c_exit(void)
> +{
> + i2c_del_driver(&tps65917_i2c_driver);
> +}
> +module_exit(tps65917_i2c_exit);
> +
> +MODULE_AUTHOR("J Keerthy <j-keerthy@...com>");
> +MODULE_DESCRIPTION("TPS65917 chip family multi-function driver");
Multi-Function Driver
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/tps65917.h b/include/linux/mfd/tps65917.h
> new file mode 100644
> index 0000000..8232e22
> --- /dev/null
> +++ b/include/linux/mfd/tps65917.h
> @@ -0,0 +1,1509 @@
> +/*
> + * TI TPS65917
> + *
> + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.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.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether expressed or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License version 2 for more details.
> + */
> +
> +#ifndef __LINUX_MFD_TPS65917_H
> +#define __LINUX_MFD_TPS65917_H
> +
> +#include <linux/regmap.h>
> +#include <linux/regulator/driver.h>
> +
> +#define TPS65917_NUM_CLIENTS 3
> +
> +/* The ID_REVISION NUMBERS */
> +#define TPS65917_CHIP_ID 0xC035
> +#define TPS65917_RESERVED -1
Line up with tabs.
> +struct tps65917 {
> + struct device *dev;
> +
> + struct i2c_client *i2c_clients[TPS65917_NUM_CLIENTS];
> + struct regmap *regmap[TPS65917_NUM_CLIENTS];
> +
> + /* Stored chip id */
> + int id;
Where is this used?
> + struct tps65917_pmic *pmic;
> +
> + /* IRQ Data */
> + int irq;
> + u32 irq_mask;
> + /* mutext for irq */
> + struct mutex irq_lock;
> + struct regmap_irq_chip_data *irq_data;
> +};
> +
> +struct tps65917_reg_init {
> + /* warm_rest controls the voltage levels after a warm reset
> + *
> + * 0: reload default values from OTP on warm reset
> + * 1: maintain voltage from VSEL on warm reset
> + */
Unusual looking comment, please correct.
> + int warm_reset;
Looks like a bool to me.
> + /* roof_floor controls whether the regulator uses the i2c style
> + * of DVS or uses the method where a GPIO or other control method is
> + * attached to the NSLEEP/ENABLE1/ENABLE2 pins
> + *
> + * For SMPS
> + *
> + * 0: i2c selection of voltage
> + * 1: pin selection of voltage.
> + *
> + * For LDO unused
> + */
Same here. Top line should not be populated.
> + int roof_floor;
Only two values is a bool.
> + /* sleep_mode is the mode loaded to MODE_SLEEP bits as defined in
> + * the data sheet.
> + *
> + * For SMPS
> + *
> + * 0: Off
> + * 1: AUTO
> + * 2: ECO
> + * 3: Forced PWM
> + *
> + * For LDO
> + *
> + * 0: Off
> + * 1: On
> + */
> + int mode_sleep;
> +
> + /* voltage_sel is the bitfield loaded onto the SMPSX_VOLTAGE
> + * register. Set this is the default voltage set in OTP needs
> + * to be overridden.
> + */
> + u8 vsel;
> +};
> +
> +enum tps65917_regulators {
> + /* SMPS regulators */
> + TPS65917_REG_SMPS1,
> + TPS65917_REG_SMPS2,
> + TPS65917_REG_SMPS3,
> + TPS65917_REG_SMPS4,
> + TPS65917_REG_SMPS5,
> + /* LDO regulators */
> + TPS65917_REG_LDO1,
> + TPS65917_REG_LDO2,
> + TPS65917_REG_LDO3,
> + TPS65917_REG_LDO4,
> + TPS65917_REG_LDO5,
> + TPS65917_REG_REGEN1,
> + TPS65917_REG_REGEN2,
> + TPS65917_REG_REGEN3,
> +
> + /* Total number of regulators */
> + TPS65917_NUM_REGS,
> +};
> +
> +struct tps65917_pmic_platform_data {
> + /* An array of pointers to regulator init data indexed by regulator
> + * ID
> + */
Odd multi-line comments throughout.
> + struct regulator_init_data *reg_data[TPS65917_NUM_REGS];
> +
> + /* An array of pointers to structures containing sleep mode and DVS
> + * configuration for regulators indexed by ID
> + */
> + struct tps65917_reg_init *reg_init[TPS65917_NUM_REGS];
> +};
> +
> +
> +struct tps65917_platform_data {
> + int irq_flags;
> + int gpio_base;
> +
> + /* bit value to be loaded to the POWER_CTRL register */
> + u8 power_ctrl;
> +
> + /*
> + * boolean to select if we want to configure muxing here
> + * then the two value to load into the registers if true
> + */
> + int mux_from_pdata;
> + u8 pad1, pad2;
> + bool pm_off;
> +
> + struct tps65917_pmic_platform_data *pmic_pdata;
> +};
> +
> +/* Define the tps65917 IRQ numbers */
> +enum tps65917_irqs {
> + /* INT1 registers */
> + TPS65917_RESERVED1,
> + TPS65917_PWRON_IRQ,
> + TPS65917_LONG_PRESS_KEY_IRQ,
> + TPS65917_RESERVED2,
> + TPS65917_PWRDOWN_IRQ,
> + TPS65917_HOTDIE_IRQ,
> + TPS65917_VSYS_MON_IRQ,
> + TPS65917_RESERVED3,
> + /* INT2 registers */
> + TPS65917_RESERVED4,
> + TPS65917_OTP_ERROR_IRQ,
> + TPS65917_WDT_IRQ,
> + TPS65917_RESERVED5,
> + TPS65917_RESET_IN_IRQ,
> + TPS65917_FSD_IRQ,
> + TPS65917_SHORT_IRQ,
> + TPS65917_RESERVED6,
> + /* INT3 registers */
> + TPS65917_GPADC_AUTO_0_IRQ,
> + TPS65917_GPADC_AUTO_1_IRQ,
> + TPS65917_GPADC_EOC_SW_IRQ,
> + TPS65917_RESREVED6,
> + TPS65917_RESERVED7,
> + TPS65917_RESERVED8,
> + TPS65917_RESERVED9,
> + TPS65917_VBUS_IRQ,
> + /* INT4 registers */
> + TPS65917_GPIO_0_IRQ,
> + TPS65917_GPIO_1_IRQ,
> + TPS65917_GPIO_2_IRQ,
> + TPS65917_GPIO_3_IRQ,
> + TPS65917_GPIO_4_IRQ,
> + TPS65917_GPIO_5_IRQ,
> + TPS65917_GPIO_6_IRQ,
> + TPS65917_RESERVED10,
> + /* Total Number IRQs */
> + TPS65917_NUM_IRQ,
> +};
> +
> +/* External controll signal name */
Spelling.
> +enum {
> + TPS65917_EXT_CONTROL_ENABLE1 = 0x1,
> + TPS65917_EXT_CONTROL_ENABLE2 = 0x2,
> + TPS65917_EXT_CONTROL_NSLEEP = 0x4,
> +};
> +
> +/*
> + * TPS65917 device resources can be controlled externally for
> + * enabling/disabling it rather than register write through i2c.
> + * Add the external controlled requestor ID for different resources.
> + */
> +enum tps65917_external_requestor_id {
> + TPS65917_EXTERNAL_REQSTR_ID_REGEN1,
> + TPS65917_EXTERNAL_REQSTR_ID_REGEN2,
> + TPS65917_EXTERNAL_REQSTR_ID_REGEN3,
> + TPS65917_EXTERNAL_REQSTR_ID_SMPS1,
> + TPS65917_EXTERNAL_REQSTR_ID_SMPS2,
> + TPS65917_EXTERNAL_REQSTR_ID_SMPS3,
> + TPS65917_EXTERNAL_REQSTR_ID_SMPS4,
> + TPS65917_EXTERNAL_REQSTR_ID_SMPS5,
> + TPS65917_EXTERNAL_REQSTR_ID_LDO1,
> + TPS65917_EXTERNAL_REQSTR_ID_LDO2,
> + TPS65917_EXTERNAL_REQSTR_ID_LDO3,
> + TPS65917_EXTERNAL_REQSTR_ID_LDO4,
> + TPS65917_EXTERNAL_REQSTR_ID_LDO5,
> + /* Last entry */
> + TPS65917_EXTERNAL_REQSTR_ID_MAX,
> +};
> +
> +struct tps65917_pmic {
> + struct tps65917 *tps65917;
> + struct device *dev;
> + struct regulator_desc desc[TPS65917_NUM_REGS];
> + struct regulator_dev *rdev[TPS65917_NUM_REGS];
> + /* pmic mutex */
> + struct mutex mutex;
> + int smps12;
> + int range[TPS65917_REG_SMPS5];
> + unsigned int ramp_delay[TPS65917_REG_SMPS5];
> + unsigned int current_reg_mode[TPS65917_REG_SMPS5];
> +};
> +
> +/* helper macro to get correct slave number */
> +#define TPS65917_BASE_TO_SLAVE(x) ((x >> 8) - 1)
> +#define TPS65917_BASE_TO_REG(x, y) ((x & 0xff) + y)
> +
> +/* Base addresses of IP blocks in TPS65917 */
> +#define TPS65917_SMPS_DVS_BASE 0x20
> +#define TPS65917_VALIDITY_BASE 0x118
> +#define TPS65917_SMPS_BASE 0x120
> +#define TPS65917_LDO_BASE 0x150
> +#define TPS65917_DVFS_BASE 0x180
> +#define TPS65917_PMU_CONTROL_BASE 0x1A0
> +#define TPS65917_RESOURCE_BASE 0x1D4
> +#define TPS65917_PU_PD_OD_BASE 0x1F0
> +#define TPS65917_LED_BASE 0x200
> +#define TPS65917_INTERRUPT_BASE 0x210
> +#define TPS65917_GPIO_BASE 0x280
> +#define TPS65917_GPADC_BASE 0x2C0
> +#define TPS65917_TRIM_GPADC_BASE 0x3CD
> +
> +/* Registers for function BACKUP */
> +#define TPS65917_BACKUP0 0x0
> +#define TPS65917_BACKUP1 0x1
> +#define TPS65917_BACKUP2 0x2
> +#define TPS65917_BACKUP3 0x3
> +#define TPS65917_BACKUP4 0x4
> +#define TPS65917_BACKUP5 0x5
> +#define TPS65917_BACKUP6 0x6
> +#define TPS65917_BACKUP7 0x7
> +
> +/* Bit definitions for BACKUP0 */
> +#define TPS65917_BACKUP0_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP0_BACKUP_SHIFT 0
> +
> +/* Bit definitions for BACKUP1 */
> +#define TPS65917_BACKUP1_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP1_BACKUP_SHIFT 0
> +
> +/* Bit definitions for BACKUP2 */
> +#define TPS65917_BACKUP2_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP2_BACKUP_SHIFT 0
> +
> +/* Bit definitions for BACKUP3 */
> +#define TPS65917_BACKUP3_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP3_BACKUP_SHIFT 0
> +
> +/* Bit definitions for BACKUP4 */
> +#define TPS65917_BACKUP4_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP4_BACKUP_SHIFT 0
> +
> +/* Bit definitions for BACKUP5 */
> +#define TPS65917_BACKUP5_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP5_BACKUP_SHIFT 0
> +
> +/* Bit definitions for BACKUP6 */
> +#define TPS65917_BACKUP6_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP6_BACKUP_SHIFT 0
> +
> +/* Bit definitions for BACKUP7 */
> +#define TPS65917_BACKUP7_BACKUP_MASK 0xff
> +#define TPS65917_BACKUP7_BACKUP_SHIFT 0
If they do not differ, remove the number and consolidate:
/* Bit definitions for BACKUP{0-7} */
#define TPS65917_BACKUP_BACKUP_MASK 0xff
#define TPS65917_BACKUP_BACKUP_SHIFT 0
> +/* Registers for function SMPS */
> +#define TPS65917_SMPS1_CTRL 0x0
> +#define TPS65917_SMPS1_FORCE 0x2
> +#define TPS65917_SMPS1_VOLTAGE 0x3
> +#define TPS65917_SMPS2_CTRL 0x4
> +#define TPS65917_SMPS2_FORCE 0x6
> +#define TPS65917_SMPS2_VOLTAGE 0x7
> +#define TPS65917_SMPS3_CTRL 0xC
> +#define TPS65917_SMPS3_FORCE 0xE
> +#define TPS65917_SMPS3_VOLTAGE 0xF
> +#define TPS65917_SMPS4_CTRL 0x10
> +#define TPS65917_SMPS4_VOLTAGE 0x13
> +#define TPS65917_SMPS5_CTRL 0x18
> +#define TPS65917_SMPS5_VOLTAGE 0x1B
> +#define TPS65917_SMPS_CTRL 0x24
> +#define TPS65917_SMPS_PD_CTRL 0x25
> +#define TPS65917_SMPS_THERMAL_EN 0x27
> +#define TPS65917_SMPS_THERMAL_STATUS 0x28
> +#define TPS65917_SMPS_SHORT_STATUS 0x29
> +#define TPS65917_SMPS_NEGATIVE_CURRENT_LIMIT_EN 0x2A
> +#define TPS65917_SMPS_POWERGOOD_MASK1 0x2B
> +#define TPS65917_SMPS_POWERGOOD_MASK2 0x2C
> +
> +/* Bit definitions for SMPS1_CTRL */
> +#define TPS65917_SMPS1_CTRL_WR_S 0x80
> +#define TPS65917_SMPS1_CTRL_WR_S_SHIFT 7
> +#define TPS65917_SMPS1_CTRL_ROOF_FLOOR_EN 0x40
> +#define TPS65917_SMPS1_CTRL_ROOF_FLOOR_EN_SHIFT 6
> +#define TPS65917_SMPS1_CTRL_STATUS_MASK 0x30
> +#define TPS65917_SMPS1_CTRL_STATUS_SHIFT 4
> +#define TPS65917_SMPS1_CTRL_MODE_SLEEP_MASK 0x0c
> +#define TPS65917_SMPS1_CTRL_MODE_SLEEP_SHIFT 2
> +#define TPS65917_SMPS1_CTRL_MODE_ACTIVE_MASK 0x03
> +#define TPS65917_SMPS1_CTRL_MODE_ACTIVE_SHIFT 0
Pick a base and stick with it. I suggest hex throughout.
[...]
> +/* Bit definitions for SMPS_PLL_CTRL */
> +
> +#define TPS65917_SMPS_PLL_CTRL_PLL_EN_PLL_BYPASS_SHIFT 0x8
> +#define TPS65917_SMPS_PLL_CTRL_PLL_PLL_EN_BYPASS 3
> +#define TPS65917_SMPS_PLL_CTRL_PLL_PLL_BYPASS_CLK_SHIFT 0x4
> +#define TPS65917_SMPS_PLL_CTRL_PLL_PLL_BYPASS_CLK 2
> +
> +
Remove this line.
> +/* Registers for function LDO */
> +#define TPS65917_LDO1_CTRL 0x0
> +#define TPS65917_LDO1_VOLTAGE 0x1
> +#define TPS65917_LDO2_CTRL 0x2
> +#define TPS65917_LDO2_VOLTAGE 0x3
> +#define TPS65917_LDO3_CTRL 0x4
> +#define TPS65917_LDO3_VOLTAGE 0x5
> +#define TPS65917_LDO4_CTRL 0xE
> +#define TPS65917_LDO4_VOLTAGE 0xF
Also standardise the number of digits represented and either
capitalise none or all of the hex letters.
[...]
> +static inline int tps65917_read(struct tps65917 *tps65917, unsigned int base,
> + unsigned int reg, unsigned int *val)
> +{
> + unsigned int addr = TPS65917_BASE_TO_REG(base, reg);
Extra ' '.
> + int slave_id = TPS65917_BASE_TO_SLAVE(base);
> +
> + return regmap_read(tps65917->regmap[slave_id], addr, val);
> +}
> +
> +static inline int tps65917_write(struct tps65917 *tps65917, unsigned int base,
> + unsigned int reg, unsigned int value)
> +{
> + unsigned int addr = TPS65917_BASE_TO_REG(base, reg);
> + int slave_id = TPS65917_BASE_TO_SLAVE(base);
> +
> + return regmap_write(tps65917->regmap[slave_id], addr, value);
> +}
> +
> +static inline int tps65917_bulk_write(struct tps65917 *tps65917,
> + unsigned int base,
> + unsigned int reg, const void *val,
> + size_t val_count)
> +{
> + unsigned int addr = TPS65917_BASE_TO_REG(base, reg);
> + int slave_id = TPS65917_BASE_TO_SLAVE(base);
> +
> + return regmap_bulk_write(tps65917->regmap[slave_id], addr,
> + val, val_count);
> +}
> +
> +static inline int tps65917_bulk_read(struct tps65917 *tps65917,
> + unsigned int base,
> + unsigned int reg, void *val,
> + size_t val_count)
> +{
> + unsigned int addr = TPS65917_BASE_TO_REG(base, reg);
> + int slave_id = TPS65917_BASE_TO_SLAVE(base);
> +
> + return regmap_bulk_read(tps65917->regmap[slave_id], addr,
> + val, val_count);
> +}
> +
> +static inline int tps65917_update_bits(struct tps65917 *tps65917,
> + unsigned int base, unsigned int reg,
> + unsigned int mask, unsigned int val)
> +{
> + unsigned int addr = TPS65917_BASE_TO_REG(base, reg);
> + int slave_id = TPS65917_BASE_TO_SLAVE(base);
> +
> + return regmap_update_bits(tps65917->regmap[slave_id], addr, mask, val);
> +}
> +
> +static inline int tps65917_irq_get_virq(struct tps65917 *tps65917, int irq)
> +{
> + return regmap_irq_get_virq(tps65917->irq_data, irq);
> +}
This is quite a lot of overhead. Are you sure you require them?
> +int tps65917_ext_control_req_config(struct tps65917 *tps65917,
> + enum tps65917_external_requestor_id ext_control_req_id,
> + int ext_ctrl, bool enable);
> +
> +#endif /* __LINUX_MFD_TPS65917_H */
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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