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Date: Thu, 14 Nov 2013 12:38:53 +0000
From: Sebastian Reichel <sre@...ian.org>
To: Sebastian Reichel <sre@...ian.org>,
Tony Lindgren <tony@...mide.com>,
Anton Vorontsov <anton@...msg.org>
Cc: David Woodhouse <dwmw2@...radead.org>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <rob.herring@...xeda.com>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Stephen Warren <swarren@...dotorg.org>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
Pali Rohár <pali.rohar@...il.com>
Subject: [PATCH 1/2] 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@...ian.org>
---
arch/arm/mach-omap2/board-rx51-peripherals.c | 10 +----
drivers/power/isp1704_charger.c | 56 +++++++++++++++++++++++++---
include/linux/power/isp1704_charger.h | 2 +-
3 files changed, 52 insertions(+), 16 deletions(-)
diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c
index a791fef..2986d16 100644
--- a/arch/arm/mach-omap2/board-rx51-peripherals.c
+++ b/arch/arm/mach-omap2/board-rx51-peripherals.c
@@ -273,13 +273,8 @@ static struct platform_device rx51_battery_device = {
.id = -1,
};
-static void rx51_charger_set_power(bool on)
-{
- gpio_set_value(RX51_USB_TRANSCEIVER_RST_GPIO, on);
-}
-
static struct isp1704_charger_data rx51_charger_data = {
- .set_power = rx51_charger_set_power,
+ .enable_gpio = RX51_USB_TRANSCEIVER_RST_GPIO,
};
static struct platform_device rx51_charger_device = {
@@ -291,9 +286,6 @@ static struct platform_device rx51_charger_device = {
static void __init rx51_charger_init(void)
{
- WARN_ON(gpio_request_one(RX51_USB_TRANSCEIVER_RST_GPIO,
- GPIOF_OUT_INIT_HIGH, "isp1704_reset"));
-
platform_device_register(&rx51_battery_device);
platform_device_register(&rx51_charger_device);
}
diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c
index fc04d19..db96778 100644
--- a/drivers/power/isp1704_charger.c
+++ b/drivers/power/isp1704_charger.c
@@ -28,6 +28,8 @@
#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>
@@ -89,8 +91,8 @@ 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);
+ if (board)
+ gpio_set_value(board->enable_gpio, on);
}
/*
@@ -411,12 +413,46 @@ 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;
+ }
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "missing platform data!\n");
+ return -ENODEV;
+ }
+
+ 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;
+
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;
@@ -475,7 +511,6 @@ 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);
@@ -488,15 +523,24 @@ 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..05081a9 100644
--- a/include/linux/power/isp1704_charger.h
+++ b/include/linux/power/isp1704_charger.h
@@ -23,7 +23,7 @@
#define __ISP1704_CHARGER_H
struct isp1704_charger_data {
- void (*set_power)(bool on);
+ int enable_gpio;
};
#endif
--
1.8.4.2
--
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