diff options
author | Sylvain Rochet <sylvain.rochet@finsecur.com> | 2015-01-20 14:39:01 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-25 14:06:42 +0100 |
commit | 7baddacbe1bc7186268aea0697400197c836f682 (patch) | |
tree | 10c67c9841f599a41499e7a3282827e49864b21a | |
parent | USB: host: ohci-at91: Use struct dev_pm_ops instead of struct platform_driver (diff) | |
download | linux-7baddacbe1bc7186268aea0697400197c836f682.tar.xz linux-7baddacbe1bc7186268aea0697400197c836f682.zip |
USB: host: ehci-atmel: Move global variables to private struct
This patch move Atmel EHCI global variables (clocks ptr and clocked
boolean) to private struct atmel_ehci_priv, stored in ehci->priv.
Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/usb/host/ehci-atmel.c | 79 |
1 files changed, 50 insertions, 29 deletions
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c index 5a15e3dd006b..663f7908b15c 100644 --- a/drivers/usb/host/ehci-atmel.c +++ b/drivers/usb/host/ehci-atmel.c @@ -27,48 +27,66 @@ #define DRIVER_DESC "EHCI Atmel driver" static const char hcd_name[] = "ehci-atmel"; -static struct hc_driver __read_mostly ehci_atmel_hc_driver; /* interface and function clocks */ -static struct clk *iclk, *fclk, *uclk; -static int clocked; +#define hcd_to_atmel_ehci_priv(h) \ + ((struct atmel_ehci_priv *)hcd_to_ehci(h)->priv) + +struct atmel_ehci_priv { + struct clk *iclk; + struct clk *fclk; + struct clk *uclk; + bool clocked; +}; + +static struct hc_driver __read_mostly ehci_atmel_hc_driver; + +static const struct ehci_driver_overrides ehci_atmel_drv_overrides __initconst = { + .extra_priv_size = sizeof(struct atmel_ehci_priv), +}; /*-------------------------------------------------------------------------*/ -static void atmel_start_clock(void) +static void atmel_start_clock(struct atmel_ehci_priv *atmel_ehci) { - if (clocked) + if (atmel_ehci->clocked) return; if (IS_ENABLED(CONFIG_COMMON_CLK)) { - clk_set_rate(uclk, 48000000); - clk_prepare_enable(uclk); + clk_set_rate(atmel_ehci->uclk, 48000000); + clk_prepare_enable(atmel_ehci->uclk); } - clk_prepare_enable(iclk); - clk_prepare_enable(fclk); - clocked = 1; + clk_prepare_enable(atmel_ehci->iclk); + clk_prepare_enable(atmel_ehci->fclk); + atmel_ehci->clocked = true; } -static void atmel_stop_clock(void) +static void atmel_stop_clock(struct atmel_ehci_priv *atmel_ehci) { - if (!clocked) + if (!atmel_ehci->clocked) return; - clk_disable_unprepare(fclk); - clk_disable_unprepare(iclk); + clk_disable_unprepare(atmel_ehci->fclk); + clk_disable_unprepare(atmel_ehci->iclk); if (IS_ENABLED(CONFIG_COMMON_CLK)) - clk_disable_unprepare(uclk); - clocked = 0; + clk_disable_unprepare(atmel_ehci->uclk); + atmel_ehci->clocked = false; } static void atmel_start_ehci(struct platform_device *pdev) { + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd); + dev_dbg(&pdev->dev, "start\n"); - atmel_start_clock(); + atmel_start_clock(atmel_ehci); } static void atmel_stop_ehci(struct platform_device *pdev) { + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd); + dev_dbg(&pdev->dev, "stop\n"); - atmel_stop_clock(); + atmel_stop_clock(atmel_ehci); } /*-------------------------------------------------------------------------*/ @@ -79,6 +97,7 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev) const struct hc_driver *driver = &ehci_atmel_hc_driver; struct resource *res; struct ehci_hcd *ehci; + struct atmel_ehci_priv *atmel_ehci; int irq; int retval; @@ -109,6 +128,7 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev) retval = -ENOMEM; goto fail_create_hcd; } + atmel_ehci = hcd_to_atmel_ehci_priv(hcd); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(&pdev->dev, res); @@ -120,23 +140,23 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev) hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); - iclk = devm_clk_get(&pdev->dev, "ehci_clk"); - if (IS_ERR(iclk)) { + atmel_ehci->iclk = devm_clk_get(&pdev->dev, "ehci_clk"); + if (IS_ERR(atmel_ehci->iclk)) { dev_err(&pdev->dev, "Error getting interface clock\n"); retval = -ENOENT; goto fail_request_resource; } - fclk = devm_clk_get(&pdev->dev, "uhpck"); - if (IS_ERR(fclk)) { + atmel_ehci->fclk = devm_clk_get(&pdev->dev, "uhpck"); + if (IS_ERR(atmel_ehci->fclk)) { dev_err(&pdev->dev, "Error getting function clock\n"); retval = -ENOENT; goto fail_request_resource; } if (IS_ENABLED(CONFIG_COMMON_CLK)) { - uclk = devm_clk_get(&pdev->dev, "usb_clk"); - if (IS_ERR(uclk)) { + atmel_ehci->uclk = devm_clk_get(&pdev->dev, "usb_clk"); + if (IS_ERR(atmel_ehci->uclk)) { dev_err(&pdev->dev, "failed to get uclk\n"); - retval = PTR_ERR(uclk); + retval = PTR_ERR(atmel_ehci->uclk); goto fail_request_resource; } } @@ -173,7 +193,6 @@ static int ehci_atmel_drv_remove(struct platform_device *pdev) usb_put_hcd(hcd); atmel_stop_ehci(pdev); - fclk = iclk = NULL; return 0; } @@ -182,21 +201,23 @@ static int ehci_atmel_drv_remove(struct platform_device *pdev) static int ehci_atmel_drv_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); + struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd); int ret; ret = ehci_suspend(hcd, false); if (ret) return ret; - atmel_stop_clock(); + atmel_stop_clock(atmel_ehci); return 0; } static int ehci_atmel_drv_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); + struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd); - atmel_start_clock(); + atmel_start_clock(atmel_ehci); return ehci_resume(hcd, false); } #endif @@ -230,7 +251,7 @@ static int __init ehci_atmel_init(void) return -ENODEV; pr_info("%s: " DRIVER_DESC "\n", hcd_name); - ehci_init_driver(&ehci_atmel_hc_driver, NULL); + ehci_init_driver(&ehci_atmel_hc_driver, &ehci_atmel_drv_overrides); return platform_driver_register(&ehci_atmel_driver); } module_init(ehci_atmel_init); 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