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Message-ID: <20190120212523.5f4zovssz6vihxsf@earth.universe>
Date: Sun, 20 Jan 2019 22:25:23 +0100
From: Sebastian Reichel <sre@...nel.org>
To: Pali Rohár <pali.rohar@...il.com>
Cc: Pavel Machek <pavel@....cz>,
Linus Walleij <linus.walleij@...aro.org>,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] power: supply: isp1704: switch to gpiod API
Hi,
On Thu, Dec 13, 2018 at 02:38:58AM +0100, Sebastian Reichel wrote:
> This migrates isp1704 driver from old GPIO API to new descriptor
> based GPIO API and drops useless platform data as a side-effect.
>
> Migration is simple, since all mainline users are DT based and
> DT API does not change. Out of tree users of the platform data
> need to migrate to gpiod_lookup_table as described here:
>
> Documentation/driver-api/gpio/board.rst
>
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> ---
> Patch has been tested on Nokia N900.
> ---
Queued to power-supply-next.
-- Sebastian
> drivers/power/supply/isp1704_charger.c | 60 ++++++--------------------
> include/linux/power/isp1704_charger.h | 30 -------------
> 2 files changed, 12 insertions(+), 78 deletions(-)
> delete mode 100644 include/linux/power/isp1704_charger.h
>
> diff --git a/drivers/power/supply/isp1704_charger.c b/drivers/power/supply/isp1704_charger.c
> index 95af5f305838..a63cb5dcfa08 100644
> --- a/drivers/power/supply/isp1704_charger.c
> +++ b/drivers/power/supply/isp1704_charger.c
> @@ -30,13 +30,12 @@
> #include <linux/power_supply.h>
> #include <linux/delay.h>
> #include <linux/of.h>
> -#include <linux/of_gpio.h>
>
> +#include <linux/gpio/consumer.h>
> #include <linux/usb/otg.h>
> #include <linux/usb/ulpi.h>
> #include <linux/usb/ch9.h>
> #include <linux/usb/gadget.h>
> -#include <linux/power/isp1704_charger.h>
>
> /* Vendor specific Power Control register */
> #define ISP1704_PWR_CTRL 0x3d
> @@ -60,6 +59,7 @@ struct isp1704_charger {
> struct device *dev;
> struct power_supply *psy;
> struct power_supply_desc psy_desc;
> + struct gpio_desc *enable_gpio;
> struct usb_phy *phy;
> struct notifier_block nb;
> struct work_struct work;
> @@ -81,18 +81,9 @@ static inline int isp1704_write(struct isp1704_charger *isp, u32 reg, u32 val)
> return usb_phy_io_write(isp->phy, val, reg);
> }
>
> -/*
> - * Disable/enable the power from the isp1704 if a function for it
> - * has been provided with platform data.
> - */
> static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on)
> {
> - struct isp1704_charger_data *board = isp->dev->platform_data;
> -
> - if (board && board->set_power)
> - board->set_power(on);
> - else if (board)
> - gpio_set_value(board->enable_gpio, on);
> + gpiod_set_value(isp->enable_gpio, on);
> }
>
> /*
> @@ -405,46 +396,19 @@ static int isp1704_charger_probe(struct platform_device *pdev)
> int ret = -ENODEV;
> struct power_supply_config psy_cfg = {};
>
> - struct isp1704_charger_data *pdata = dev_get_platdata(&pdev->dev);
> - struct device_node *np = pdev->dev.of_node;
> -
> - if (np) {
> - int gpio = of_get_named_gpio(np, "nxp,enable-gpio", 0);
> -
> - if (gpio < 0) {
> - dev_err(&pdev->dev, "missing DT GPIO nxp,enable-gpio\n");
> - return gpio;
> - }
> -
> - pdata = devm_kzalloc(&pdev->dev,
> - sizeof(struct isp1704_charger_data), GFP_KERNEL);
> - if (!pdata) {
> - ret = -ENOMEM;
> - goto fail0;
> - }
> - pdata->enable_gpio = gpio;
> -
> - dev_info(&pdev->dev, "init gpio %d\n", pdata->enable_gpio);
> -
> - ret = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
> - GPIOF_OUT_INIT_HIGH, "isp1704_reset");
> - if (ret) {
> - dev_err(&pdev->dev, "gpio request failed\n");
> - goto fail0;
> - }
> - }
> -
> - if (!pdata) {
> - dev_err(&pdev->dev, "missing platform data!\n");
> - return -ENODEV;
> - }
> -
> -
> isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);
> if (!isp)
> return -ENOMEM;
>
> - if (np)
> + isp->enable_gpio = devm_gpiod_get(&pdev->dev, "nxp,enable",
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(isp->enable_gpio)) {
> + ret = PTR_ERR(isp->enable_gpio);
> + dev_err(&pdev->dev, "Could not get reset gpio: %d\n", ret);
> + return ret;
> + }
> +
> + if (pdev->dev.of_node)
> isp->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
> else
> isp->phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
> diff --git a/include/linux/power/isp1704_charger.h b/include/linux/power/isp1704_charger.h
> deleted file mode 100644
> index 0105d9e7af85..000000000000
> --- a/include/linux/power/isp1704_charger.h
> +++ /dev/null
> @@ -1,30 +0,0 @@
> -/*
> - * ISP1704 USB Charger Detection driver
> - *
> - * Copyright (C) 2011 Nokia Corporation
> - *
> - * 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 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, write to the Free Software
> - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> - */
> -
> -
> -#ifndef __ISP1704_CHARGER_H
> -#define __ISP1704_CHARGER_H
> -
> -struct isp1704_charger_data {
> - void (*set_power)(bool on);
> - int enable_gpio;
> -};
> -
> -#endif
> --
> 2.19.2
>
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