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Date: Fri, 2 Jun 2017 17:35:45 +0800
From: Guodong Xu <guodong.xu@...aro.org>
To: Lee Jones <lee.jones@...aro.org>
Cc: Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
"xuwei (O)" <xuwei5@...ilicon.com>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Kevin Hilman <khilman@...libre.com>,
Arnd Bergmann <arnd@...db.de>,
Gregory CLEMENT <gregory.clement@...e-electrons.com>,
Olof Johansson <olof@...om.net>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Riku Voipio <riku.voipio@...aro.org>,
Thierry Reding <treding@...dia.com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Eric Anholt <eric@...olt.net>, damm+renesas@...nsource.se,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Linus Walleij <linus.walleij@...aro.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
devicetree@...r.kernel.org,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
"hw Wang(Xiaoyin)" <hw.wangxiaoyin@...ilicon.com>
Subject: Re: [PATCH 3/6] mfd: hi6421v530: add support for HiSilicon Hi6421v530
On Tue, May 30, 2017 at 3:36 PM, Lee Jones <lee.jones@...aro.org> wrote:
> On Fri, 26 May 2017, Guodong Xu wrote:
>
>> Add support for HiSilicon Hi6421v530 PMIC. Hi6421v530 communicates with
>> main SoC via memory-mapped I/O.
>>
>> Hi6421v530 and Hi6421 are PMIC chips from the same vendor, HiSilicon, but
>> at different revisions. They share the same memory-mapped I/O design. They
>> differ in regulator details, eg. LDO voltage points.
>>
>> Signed-off-by: Guodong Xu <guodong.xu@...aro.org>
>> Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@...ilicon.com>
>> ---
>> drivers/mfd/Kconfig | 9 +++++
>> drivers/mfd/Makefile | 1 +
>> drivers/mfd/hi6421v530-pmic.c | 92 +++++++++++++++++++++++++++++++++++++++++++
>
> As previously discussed, this support should be added to the existing
> driver.
Yes, I will do that.
>
>> 3 files changed, 102 insertions(+)
>> create mode 100644 drivers/mfd/hi6421v530-pmic.c
>>
>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>> index 3eb5c93..bdc8304 100644
>> --- a/drivers/mfd/Kconfig
>> +++ b/drivers/mfd/Kconfig
>> @@ -388,6 +388,15 @@ config MFD_HI6421_PMIC
>> menus in order to enable them.
>> We communicate with the Hi6421 via memory-mapped I/O.
>>
>> +config MFD_HI6421V530_PMIC
>> + tristate "HiSilicon Hi6421v530 PMU/Codec IC"
>> + depends on OF
>> + select MFD_CORE
>> + select REGMAP_MMIO
>> + help
>> + Add support for HiSilicon Hi6421v530 PMIC. Hi6421v530 communicates
>> + with main SoC via memory-mapped I/O.
>> +
>> config MFD_HI655X_PMIC
>> tristate "HiSilicon Hi655X series PMU/Codec IC"
>> depends on ARCH_HISI || COMPILE_TEST
>> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
>> index c16bf1e..cde62fc 100644
>> --- a/drivers/mfd/Makefile
>> +++ b/drivers/mfd/Makefile
>> @@ -206,6 +206,7 @@ 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-$(CONFIG_MFD_HI6421V530_PMIC) += hi6421v530-pmic.o
>> obj-$(CONFIG_MFD_HI655X_PMIC) += hi655x-pmic.o
>> obj-$(CONFIG_MFD_DLN2) += dln2.o
>> obj-$(CONFIG_MFD_RT5033) += rt5033.o
>> diff --git a/drivers/mfd/hi6421v530-pmic.c b/drivers/mfd/hi6421v530-pmic.c
>> new file mode 100644
>> index 0000000..651659a
>> --- /dev/null
>> +++ b/drivers/mfd/hi6421v530-pmic.c
>> @@ -0,0 +1,92 @@
>> +/*
>> + * Device driver for Hi6421 IC
>> + *
>> + * Copyright (c) <2017> HiSilicon Technologies Co., Ltd.
>> + * http://www.hisilicon.com
>> + * Copyright (c) <2017> Linaro Ltd.
>> + * http://www.linaro.org
>> + *
>> + * Author: Wang Xiaoyin <hw.wangxiaoyin@...ilicon.com>
>> + * Guodong Xu <guodong.xu@...aro.org>
>> + *
>> + * 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 of the License, or
>> + * (at your option) any later version.
>> + *
>> + * This program is distributed in the hope 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/>.
>
> Can you use the shorter licence script?
>
>> + */
>> +
>> +#include <linux/device.h>
>> +#include <linux/err.h>
>> +#include <linux/mfd/core.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/regmap.h>
>> +#include <linux/mfd/hi6421-pmic.h>
>
> Alphabetical.
>
I will update that in the existing drivers/mfd/hi6421-pmic-core.c
together with my other changes.
>> +static const struct mfd_cell hi6421v530_devs[] = {
>> + { .name = "hi6421v530-regulator", },
>> +};
>
> Chen Feng promised me that he would add other devices to the original
> driver nearly 18 months ago. Until more devices are added, these are
> not MFD drivers. When will you add the remaining devices?
>
New devices will be added when enabling functions on the hikey960
board. v530 provides a clk for wifi/bt, that can be added very quick.
>> +static int hi6421v530_pmic_probe(struct platform_device *pdev)
>> +{
>> + struct hi6421_pmic *pmic;
>> + struct resource *res;
>> + void __iomem *base;
>> + int ret;
>> +
>> + pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
>> + if (!pmic)
>> + return -ENOMEM;
>> +
>> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> + base = devm_ioremap_resource(&pdev->dev, res);
>> + if (IS_ERR(base))
>> + return PTR_ERR(base);
>> +
>> + pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
>> + &hi6421_regmap_config);
>> + if (IS_ERR(pmic->regmap)) {
>> + dev_err(&pdev->dev,
>> + "regmap init failed: %ld\n", PTR_ERR(pmic->regmap));
>
> "Failed to initialise Regmap"
Thanks, will update in the existing drivers/mfd/hi6421-pmic-core.c
>
>> + return PTR_ERR(pmic->regmap);
>> + }
>> +
>> + platform_set_drvdata(pdev, pmic);
>> +
>> + ret = devm_mfd_add_devices(&pdev->dev, 0, hi6421v530_devs,
>
> Use the #defines provided instead of '0'.
>
>> + ARRAY_SIZE(hi6421v530_devs), NULL, 0, NULL);
>> + if (ret) {
>> + dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret);
>
> "Failed to add child devices"
>
Thanks, will update in the existing drivers/mfd/hi6421-pmic-core.c
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static const struct of_device_id of_hi6421v530_pmic_match_tbl[] = {
>> + { .compatible = "hisilicon,hi6421v530-pmic", },
>> + { },
>> +};
>> +MODULE_DEVICE_TABLE(of, of_hi6421v530_pmic_match_tbl);
>
> Drop the "_tbl" part, it's implied and superfluous.
>
Will update.
>> +static struct platform_driver hi6421v530_pmic_driver = {
>> + .driver = {
>> + .name = "hi6421v530_pmic",
>
> One space please.
>
Thanks, will update.
I will send updates in v3 soon.
-Guodong
>> + .of_match_table = of_hi6421v530_pmic_match_tbl,
>> + },
>> + .probe = hi6421v530_pmic_probe,
>> +};
>> +module_platform_driver(hi6421v530_pmic_driver);
>> +
>> +MODULE_AUTHOR("Guodong Xu <guodong.xu@...aro.org>");
>> +MODULE_DESCRIPTION("Hi6421v530 PMIC driver");
>> +MODULE_LICENSE("GPL v2");
>
>
> --
> Lee Jones
> Linaro STMicroelectronics Landing Team Lead
> Linaro.org │ Open source software for ARM SoCs
> Follow Linaro: Facebook | Twitter | Blog
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