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Date: Tue, 4 Nov 2014 10:54:21 +0000
From: Lee Jones <lee.jones@...aro.org>
To: gyungoh@...il.com
Cc: sameo@...ux.intel.com, jg1.han@...sung.com, cooloney@...il.com,
broonie@...nel.org, lgirdwood@...il.com, jack.yoo@...worksinc.com,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
grant.likely@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
pawel.moll@....com, heiko@...ech.de, jason@...edaemon.net,
shawn.guo@...escale.com, treding@...dia.com,
florian.vaussard@...l.ch, trivial@...nel.org, linux@...ck-us.net,
andrew@...n.ch, jic23@...nel.org
Subject: Re: [RESUBMIT PATCH v6 1/8] mfd: Add support for Skyworks SKY81452
driver
On Mon, 03 Nov 2014, Lee Jones wrote:
> On Fri, 31 Oct 2014, gyungoh@...il.com wrote:
>
> > From: Gyungoh Yoo <jack.yoo@...worksinc.com>
> >
> > Signed-off-by: Gyungoh Yoo <jack.yoo@...worksinc.com>
> > ---
> > Changes v6:
> > Added new line character at the end of line of dev_err()
> >
> > Changes v5:
> > Move sky81452-backlight.h to include/linux/platform_data
> >
> > Changes v4:
> > Removed MODULE_VERSION()
> > Modified license to GPLv2
> >
> > Changes v3:
> > Fixed the backlight name from 'sky81452-bl' to 'sky81452-backlight'
> > Assigned mfd_cell.of_compatible for binding device node
> > Modified error messages
> >
> > Changes v2:
> > Renamed CONFIG_SKY81452 to CONFIG_MFD_SKY81452
> > Changed the dependency from I2C=y to I2C, for CONFIG_MFD_SKY81452
> > Added message for exception or errors
> >
> > drivers/mfd/Kconfig | 12 +++++
> > drivers/mfd/Makefile | 1 +
> > drivers/mfd/sky81452.c | 109 +++++++++++++++++++++++++++++++++++++++++++
> > include/linux/mfd/sky81452.h | 32 +++++++++++++
> > 4 files changed, 154 insertions(+)
> > create mode 100644 drivers/mfd/sky81452.c
> > create mode 100644 include/linux/mfd/sky81452.h
>
> Code looks fine, but what are its dependencies. I'm assuming nothing;
> however, did Mark say that something depends on it? If so, what and
> what are you going to do about it?
Okay, so this driver does in fact have a dependancy on the Backlight
driver. Until I get a Backlight Ack from either Brian and/or Jingoo,
there is nothing I can do.
Patch unapplied.
> > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> > index 1456ea7..a54244c 100644
> > --- a/drivers/mfd/Kconfig
> > +++ b/drivers/mfd/Kconfig
> > @@ -693,6 +693,18 @@ config MFD_SM501_GPIO
> > lines on the SM501. The platform data is used to supply the
> > base number for the first GPIO line to register.
> >
> > +config MFD_SKY81452
> > + tristate "Skyworks Solutions SKY81452"
> > + select MFD_CORE
> > + select REGMAP_I2C
> > + depends on I2C
> > + help
> > + This is the core driver for the Skyworks SKY81452 backlight and
> > + voltage regulator device.
> > +
> > + This driver can also be built as a module. If so, the module
> > + will be called sky81452.
> > +
> > config MFD_SMSC
> > bool "SMSC ECE1099 series chips"
> > depends on I2C=y
> > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> > index 8bd54b1..d9683ea 100644
> > --- a/drivers/mfd/Makefile
> > +++ b/drivers/mfd/Makefile
> > @@ -174,6 +174,7 @@ obj-$(CONFIG_MFD_STW481X) += stw481x.o
> > obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.o
> > obj-$(CONFIG_MFD_MENF21BMC) += menf21bmc.o
> > obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o
> > +obj-$(CONFIG_MFD_SKY81452) += sky81452.o
> >
> > intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
> > obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
> > diff --git a/drivers/mfd/sky81452.c b/drivers/mfd/sky81452.c
> > new file mode 100644
> > index 0000000..ae1b584
> > --- /dev/null
> > +++ b/drivers/mfd/sky81452.c
> > @@ -0,0 +1,109 @@
> > +/*
> > + * sky81452.c SKY81452 MFD driver
> > + *
> > + * Copyright 2014 Skyworks Solutions Inc.
> > + * Author : Gyungoh Yoo <jack.yoo@...worksinc.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify it
> > + * under the terms of the GNU General Public License as published by the
> > + * Free Software Foundation; either version 2, or (at your option) any
> > + * later version.
> > + *
> > + * This program is distributed in the hope that it will be useful, but
> > + * WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + * General Public License for more details.
> > + *
> > + * 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/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/init.h>
> > +#include <linux/err.h>
> > +#include <linux/slab.h>
> > +#include <linux/i2c.h>
> > +#include <linux/regmap.h>
> > +#include <linux/mfd/core.h>
> > +#include <linux/mfd/sky81452.h>
> > +
> > +static const struct regmap_config sky81452_config = {
> > + .reg_bits = 8,
> > + .val_bits = 8,
> > +};
> > +
> > +static int sky81452_probe(struct i2c_client *client,
> > + const struct i2c_device_id *id)
> > +{
> > + struct device *dev = &client->dev;
> > + const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
> > + struct mfd_cell cells[2];
> > + struct regmap *regmap;
> > + int ret;
> > +
> > + if (!pdata) {
> > + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
> > + if (!pdata)
> > + return -ENOMEM;
> > + }
> > +
> > + regmap = devm_regmap_init_i2c(client, &sky81452_config);
> > + if (IS_ERR(regmap)) {
> > + dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
> > + return PTR_ERR(regmap);
> > + }
> > +
> > + i2c_set_clientdata(client, regmap);
> > +
> > + memset(cells, 0, sizeof(cells));
> > + cells[0].name = "sky81452-backlight";
> > + cells[0].of_compatible = "skyworks,sky81452-backlight";
> > + cells[0].platform_data = pdata->bl_pdata;
> > + cells[0].pdata_size = sizeof(*pdata->bl_pdata);
> > + cells[1].name = "sky81452-regulator";
> > + cells[1].platform_data = pdata->regulator_init_data;
> > + cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
> > +
> > + ret = mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells), NULL, 0, NULL);
> > + if (ret)
> > + dev_err(dev, "failed to add child devices. err=%d\n", ret);
> > +
> > + return ret;
> > +}
> > +
> > +static int sky81452_remove(struct i2c_client *client)
> > +{
> > + mfd_remove_devices(&client->dev);
> > + return 0;
> > +}
> > +
> > +static const struct i2c_device_id sky81452_ids[] = {
> > + { "sky81452" },
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(i2c, sky81452_ids);
> > +
> > +#ifdef CONFIG_OF
> > +static const struct of_device_id sky81452_of_match[] = {
> > + { .compatible = "skyworks,sky81452", },
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(of, sky81452_of_match);
> > +#endif
> > +
> > +static struct i2c_driver sky81452_driver = {
> > + .driver = {
> > + .name = "sky81452",
> > + .of_match_table = of_match_ptr(sky81452_of_match),
> > + },
> > + .probe = sky81452_probe,
> > + .remove = sky81452_remove,
> > + .id_table = sky81452_ids,
> > +};
> > +
> > +module_i2c_driver(sky81452_driver);
> > +
> > +MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
> > +MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@...worksinc.com>");
> > +MODULE_LICENSE("GPL v2");
> > diff --git a/include/linux/mfd/sky81452.h b/include/linux/mfd/sky81452.h
> > new file mode 100644
> > index 0000000..9d84872
> > --- /dev/null
> > +++ b/include/linux/mfd/sky81452.h
> > @@ -0,0 +1,32 @@
> > +/*
> > + * sky81452.h SKY81452 MFD driver
> > + *
> > + * Copyright 2014 Skyworks Solutions Inc.
> > + * Author : Gyungoh Yoo <jack.yoo@...worksinc.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify it
> > + * under the terms of the GNU General Public License as published by the
> > + * Free Software Foundation; either version 2, or (at your option) any
> > + * later version.
> > + *
> > + * This program is distributed in the hope that it will be useful, but
> > + * WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + * General Public License for more details.
> > + *
> > + * 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 _SKY81452_H
> > +#define _SKY81452_H
> > +
> > +#include <linux/platform_data/sky81452-backlight.h>
> > +#include <linux/regulator/machine.h>
> > +
> > +struct sky81452_platform_data {
> > + struct sky81452_bl_platform_data *bl_pdata;
> > + struct regulator_init_data *regulator_init_data;
> > +};
> > +
> > +#endif
>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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