https://github.com/torvalds/linux
Revision 2f558bc3f33ca344489cec2218545741028b6a70 authored by Miquel Raynal on 04 December 2018, 19:28:28 UTC, committed by Jens Axboe on 11 January 2019, 21:47:50 UTC
A3700 comphy initialization is done in the firmware (TF-A). Looking at the SATA PHY initialization routine, there is a comment about "vendor specific" registers. Two registers are mentioned. They are not initialized there in the firmware because they are AHCI related, while the firmware at this location does only PHY configuration. The solution to avoid doing such initialization is relying on U-Boot. While this work at boot time, U-Boot is definitely not going to run during a resume after suspending to RAM. Two possible solutions were considered: * Fixing the firmware. * Fixing the kernel driver. The first solution would take ages to propagate, while the second solution is easy to implement as the driver as been a little bit reworked to prepare for such platform configuration. Hence, this patch adds an Armada 3700 configuration function to set these two registers both at boot time (in the probe) and after a suspend (in the resume path). Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 96dbcb4
Tip revision: 2f558bc3f33ca344489cec2218545741028b6a70 authored by Miquel Raynal on 04 December 2018, 19:28:28 UTC
ata: ahci: mvebu: add Armada 3700 initialization needed for S2RAM
ata: ahci: mvebu: add Armada 3700 initialization needed for S2RAM
Tip revision: 2f558bc
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| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
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| security | ||
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| .clang-format | -rw-r--r-- | 12.7 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.5 KB |
| .mailmap | -rw-r--r-- | 10.6 KB |
| COPYING | -rw-r--r-- | 423 bytes |
| CREDITS | -rw-r--r-- | 96.9 KB |
| Kbuild | -rw-r--r-- | 1.7 KB |
| Kconfig | -rw-r--r-- | 563 bytes |
| MAINTAINERS | -rw-r--r-- | 478.9 KB |
| Makefile | -rw-r--r-- | 59.4 KB |
| README | -rw-r--r-- | 727 bytes |
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