Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
usb: dwc3-am62: Fix PHY core voltage selection
TRM information is outdated and design team has confirmed
that PHY_CORE_VOLTAGE should be 0 irrespective of
VDD_CORE voltage.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20240227-for-v6-9-am62-usb-errata-3-0-v4-3-0ada8ddb0767@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Roger Quadros
and committed by
Greg Kroah-Hartman
d78ff375
4ead695e
+9
-1
+9
-1
drivers/usb/dwc3/dwc3-am62.c
+9
-1
drivers/usb/dwc3/dwc3-am62.c
···
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#define USBSS_VBUS_STAT_SESSVALID BIT(2)
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#define USBSS_VBUS_STAT_VBUSVALID BIT(0)
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-
/* Mask for PHY PLL REFCLK */
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+
/* USB_PHY_CTRL register bits in CTRL_MMR */
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#define PHY_CORE_VOLTAGE_MASK BIT(31)
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#define PHY_PLL_REFCLK_MASK GENMASK(3, 0)
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#define DWC3_AM62_AUTOSUSPEND_DELAY 100
···
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return ret;
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am62->offset = args.args[0];
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+
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/* Core voltage. PHY_CORE_VOLTAGE bit Recommended to be 0 always */
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ret = regmap_update_bits(am62->syscon, am62->offset, PHY_CORE_VOLTAGE_MASK, 0);
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+
if (ret) {
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dev_err(dev, "failed to set phy core voltage\n");
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return ret;
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+
}
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ret = regmap_update_bits(am62->syscon, am62->offset, PHY_PLL_REFCLK_MASK, am62->rate_code);
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if (ret) {