forked from Minki/linux
4d175f340c
Since we only enable the PHY clock on init and the PHY init and shutdown does not occur in atomitc context there is no need to prepare the clock before it is enabled. Move the clk_prepare() operations to go along with the enables, allowing the clock to be fully idle when not in use. Signed-off-by: Mark Brown <broonie@linaro.org> Signed-off-by: Felipe Balbi <balbi@ti.com>
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/usb_phy_gen_xceiv.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/regulator/consumer.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include "am35x-phy-control.h"
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#include "phy-generic.h"
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struct am335x_phy {
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struct usb_phy_gen_xceiv usb_phy_gen;
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struct phy_control *phy_ctrl;
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int id;
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};
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static int am335x_init(struct usb_phy *phy)
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{
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struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
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return 0;
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}
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static void am335x_shutdown(struct usb_phy *phy)
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{
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struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
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}
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static int am335x_phy_probe(struct platform_device *pdev)
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{
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struct am335x_phy *am_phy;
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struct device *dev = &pdev->dev;
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int ret;
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am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
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if (!am_phy)
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return -ENOMEM;
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am_phy->phy_ctrl = am335x_get_phy_control(dev);
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if (!am_phy->phy_ctrl)
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return -EPROBE_DEFER;
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am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
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if (am_phy->id < 0) {
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dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
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return am_phy->id;
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}
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ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen,
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USB_PHY_TYPE_USB2, 0, false, false);
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if (ret)
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return ret;
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ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
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if (ret)
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return ret;
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am_phy->usb_phy_gen.phy.init = am335x_init;
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am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;
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platform_set_drvdata(pdev, am_phy);
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return 0;
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return ret;
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}
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static int am335x_phy_remove(struct platform_device *pdev)
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{
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struct am335x_phy *am_phy = platform_get_drvdata(pdev);
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usb_remove_phy(&am_phy->usb_phy_gen.phy);
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return 0;
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}
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static const struct of_device_id am335x_phy_ids[] = {
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{ .compatible = "ti,am335x-usb-phy" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, am335x_phy_ids);
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static struct platform_driver am335x_phy_driver = {
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.probe = am335x_phy_probe,
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.remove = am335x_phy_remove,
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.driver = {
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.name = "am335x-phy-driver",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(am335x_phy_ids),
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},
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};
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module_platform_driver(am335x_phy_driver);
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MODULE_LICENSE("GPL v2");
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