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usb: hub: make minimum power-on delay configurable
This patch makes the minimum power-on delay for USB HUB become configurable. The original design waits at least 100 msec here, but some EHCI controlers(e.g. Faraday EHCI) are known to require much longer delay interval. Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com> CC: Marek Vasut <marex@denx.de>
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README
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README
@ -1261,6 +1261,9 @@ The following options need to be configured:
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CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the
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CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the
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txfilltuning field in the EHCI controller on reset.
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txfilltuning field in the EHCI controller on reset.
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CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum
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interval for usb hub power-on delay.(minimum 100msec)
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- USB Device:
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- USB Device:
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Define the below if you wish to use the USB console.
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Define the below if you wish to use the USB console.
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Once firmware is rebuilt from a serial console issue the
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Once firmware is rebuilt from a serial console issue the
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@ -53,6 +53,10 @@
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#include <asm/4xx_pci.h>
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#include <asm/4xx_pci.h>
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#endif
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#endif
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#ifndef CONFIG_USB_HUB_MIN_POWER_ON_DELAY
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#define CONFIG_USB_HUB_MIN_POWER_ON_DELAY 100
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#endif
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#define USB_BUFSIZ 512
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#define USB_BUFSIZ 512
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static struct usb_hub_device hub_dev[USB_MAX_HUB];
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static struct usb_hub_device hub_dev[USB_MAX_HUB];
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@ -148,8 +152,8 @@ static void usb_hub_power_on(struct usb_hub_device *hub)
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debug("port %d returns %lX\n", i + 1, dev->status);
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debug("port %d returns %lX\n", i + 1, dev->status);
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}
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}
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/* Wait at least 100 msec for power to become stable */
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/* Wait for power to become stable */
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mdelay(max(pgood_delay, (unsigned)100));
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mdelay(max(pgood_delay, CONFIG_USB_HUB_MIN_POWER_ON_DELAY));
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}
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}
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void usb_hub_reset(void)
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void usb_hub_reset(void)
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