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usb: ohci-omap: Create private state container

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The OMAP1 was using static locals to hold the clock handles
which is uncommon and does not scale. Create a private data
struct and use that to hold the clocks.

Cc: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200720135524.100374-1-linus.walleij@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Walleij 2020-07-20 15:55:23 +02:00 committed by Greg Kroah-Hartman
parent d8a849353c
commit 2334186343
1 changed files with 51 additions and 38 deletions
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89
drivers/usb/host/ohci-omap.c
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@ -69,22 +69,27 @@ static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
#endif
static struct clk *usb_host_ck;
static struct clk *usb_dc_ck;
struct ohci_omap_priv {
struct clk *usb_host_ck;
struct clk *usb_dc_ck;
};
static const char hcd_name[] = "ohci-omap";
static struct hc_driver __read_mostly ohci_omap_hc_driver;
static void omap_ohci_clock_power(int on)
#define hcd_to_ohci_omap_priv(h) \
((struct ohci_omap_priv *)hcd_to_ohci(h)->priv)
static void omap_ohci_clock_power(struct ohci_omap_priv *priv, int on)
{
if (on) {
clk_enable(usb_dc_ck);
clk_enable(usb_host_ck);
clk_enable(priv->usb_dc_ck);
clk_enable(priv->usb_host_ck);
/* guesstimate for T5 == 1x 32K clock + APLL lock time */
udelay(100);
} else {
clk_disable(usb_host_ck);
clk_disable(usb_dc_ck);
clk_disable(priv->usb_host_ck);
clk_disable(priv->usb_dc_ck);
}
}
@ -196,6 +201,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
int need_transceiver = (config->otg != 0);
int ret;
@ -235,7 +241,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd)
}
#endif
omap_ohci_clock_power(1);
omap_ohci_clock_power(priv, 1);
if (cpu_is_omap15xx()) {
omap_1510_local_bus_power(1);
@ -305,6 +311,7 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
{
int retval, irq;
struct usb_hcd *hcd = 0;
struct ohci_omap_priv *priv;
if (pdev->num_resources != 2) {
dev_err(&pdev->dev, "invalid num_resources: %i\n",
@ -318,34 +325,35 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
return -ENODEV;
}
usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
if (IS_ERR(usb_host_ck))
return PTR_ERR(usb_host_ck);
if (!cpu_is_omap15xx())
usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
else
usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
if (IS_ERR(usb_dc_ck)) {
clk_put(usb_host_ck);
return PTR_ERR(usb_dc_ck);
}
hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
goto err0;
}
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = pdev->resource[0].start;
hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
priv = hcd_to_ohci_omap_priv(hcd);
priv->usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
if (IS_ERR(priv->usb_host_ck)) {
retval = PTR_ERR(priv->usb_host_ck);
goto err_put_hcd;
}
if (!cpu_is_omap15xx())
priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
else
priv->usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
if (IS_ERR(priv->usb_dc_ck)) {
retval = PTR_ERR(priv->usb_dc_ck);
goto err_put_host_ck;
}
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
dev_dbg(&pdev->dev, "request_mem_region failed\n");
retval = -EBUSY;
goto err1;
goto err_put_dc_ck;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
@ -370,11 +378,12 @@ err3:
iounmap(hcd->regs);
err2:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
err_put_dc_ck:
clk_put(priv->usb_dc_ck);
err_put_host_ck:
clk_put(priv->usb_host_ck);
err_put_hcd:
usb_put_hcd(hcd);
err0:
clk_put(usb_dc_ck);
clk_put(usb_host_ck);
return retval;
}
@ -393,10 +402,11 @@ err0:
static int ohci_hcd_omap_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
dev_dbg(hcd->self.controller, "stopping USB Controller\n");
usb_remove_hcd(hcd);
omap_ohci_clock_power(0);
omap_ohci_clock_power(priv, 0);
if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
(void) otg_set_host(hcd->usb_phy->otg, 0);
usb_put_phy(hcd->usb_phy);
@ -405,9 +415,9 @@ static int ohci_hcd_omap_remove(struct platform_device *pdev)
gpio_free(9);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
clk_put(priv->usb_dc_ck);
clk_put(priv->usb_host_ck);
usb_put_hcd(hcd);
clk_put(usb_dc_ck);
clk_put(usb_host_ck);
return 0;
}
@ -419,6 +429,7 @@ static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
bool do_wakeup = device_may_wakeup(&pdev->dev);
int ret;
@ -430,7 +441,7 @@ static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
if (ret)
return ret;
omap_ohci_clock_power(0);
omap_ohci_clock_power(priv, 0);
return ret;
}
@ -438,12 +449,13 @@ static int ohci_omap_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
omap_ohci_clock_power(1);
omap_ohci_clock_power(priv, 1);
ohci_resume(hcd, false);
return 0;
}
@ -470,7 +482,8 @@ static struct platform_driver ohci_hcd_omap_driver = {
static const struct ohci_driver_overrides omap_overrides __initconst = {
.product_desc = "OMAP OHCI",
.reset = ohci_omap_reset
.reset = ohci_omap_reset,
.extra_priv_size = sizeof(struct ohci_omap_priv),
};
static int __init ohci_omap_init(void)