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@xxxxxxxxxx>
---
drivers/power/isp1704_charger.c | 55 ++++++++++++++++++++++++++++++++---
include/linux/power/isp1704_charger.h | 1 +
2 files changed, 52 insertions(+), 4 deletions(-)
diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c
index 1bb3a91..2535989 100644
--- a/drivers/power/isp1704_charger.c
+++ b/drivers/power/isp1704_charger.c
@@ -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 +515,24 @@ 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,
diff --git a/include/linux/power/isp1704_charger.h b/include/linux/power/isp1704_charger.h
index 68096a6..0105d9e 100644
--- a/include/linux/power/isp1704_charger.h
+++ b/include/linux/power/isp1704_charger.h
@@ -24,6 +24,7 @@
struct isp1704_charger_data {
void (*set_power)(bool on);
+ int enable_gpio;
};
#endif
--
1.8.4.3
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