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isp1704_charger: Add DT support 

This patch introduces device tree support to the isp1704 charger driver.
Adding support involved moving the handling of the enable GPIO from board
code into the driver.

Signed-off-by: Sebastian Reichel <sre@debian.org>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
This commit is contained in:
Sebastian Reichel 2013-12-01 02:00:10 +01:00 committed by Anton Vorontsov
parent 434a09f9c4
commit 34a109610e
2 changed files with 51 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/power/isp1704_charger.c
View File

@ -29,6 +29,8 @@
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
@ -88,6 +90,8 @@ static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on)
if (board && board->set_power)
board->set_power(on);
else if (board)
gpio_set_value(board->enable_gpio, on);
}
/*
@ -400,12 +404,47 @@ static int isp1704_charger_probe(struct platform_device *pdev)
struct isp1704_charger *isp;
int ret = -ENODEV;
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)
return gpio;
pdata = devm_kzalloc(&pdev->dev,
sizeof(struct isp1704_charger_data), GFP_KERNEL);
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)
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;
isp->phy = usb_get_phy(USB_PHY_TYPE_USB2);
if (IS_ERR_OR_NULL(isp->phy))
if (np)
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);
if (IS_ERR(isp->phy)) {
ret = PTR_ERR(isp->phy);
goto fail0;
}
if (!isp->phy)
goto fail0;
isp->dev = &pdev->dev;
@ -464,7 +503,6 @@ fail2:
power_supply_unregister(&isp->psy);
fail1:
isp1704_charger_set_power(isp, 0);
usb_put_phy(isp->phy);
fail0:
dev_err(&pdev->dev, "failed to register isp1704 with error %d\n", ret);
@ -477,15 +515,23 @@ static int isp1704_charger_remove(struct platform_device *pdev)
usb_unregister_notifier(isp->phy, &isp->nb);
power_supply_unregister(&isp->psy);
usb_put_phy(isp->phy);
isp1704_charger_set_power(isp, 0);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id omap_isp1704_of_match[] = {
{ .compatible = "nxp,isp1704", },
{},
};
MODULE_DEVICE_TABLE(of, omap_isp1704_of_match);
#endif
static struct platform_driver isp1704_charger_driver = {
.driver = {
.name = "isp1704_charger",
.of_match_table = of_match_ptr(omap_isp1704_of_match),
},
.probe = isp1704_charger_probe,
.remove = isp1704_charger_remove,

1
include/linux/power/isp1704_charger.h
View File

@ -24,6 +24,7 @@
struct isp1704_charger_data {
void (*set_power)(bool on);
int enable_gpio;
};
#endif