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usb: misc: usb3503: support usb3803 and bypass mode

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Add support for USB3803 and bypass mode, with this change
is also possible to move the component out of bypass mode.

In bypass mode the downstream port 3 is connected to the
upstream port with low switch resistance R_on.

Controlling mode of operations:

| RESET_N | BYPASS_N | Mode    |
--------------------------------
|    0    |    0     | standby |
|    1    |    0     | bypass  |
|    1    |    1     | hub     |

Datasheet: https://ww1.microchip.com/downloads/aemDocuments/documents/UNG/ProductDocuments/DataSheets/00001691D.pdf
Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20230313165039.255579-4-francesco@dolcini.it
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Emanuele Ghidoli
2023-03-13 17:50:39 +01:00
committed by Greg Kroah-Hartman
parent b04b32cd67
commit b91e610711
2 changed files with 22 additions and 1 deletions
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1
include/linux/platform_data/usb3503.h
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@@ -12,6 +12,7 @@ enum usb3503_mode {
USB3503_MODE_UNKNOWN,
USB3503_MODE_HUB,
USB3503_MODE_STANDBY,
USB3503_MODE_BYPASS,
};
struct usb3503_platform_data {