admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

ARM: at91: pm: avoid soft resetting AC DLL

Browse Source 
Do not soft reset AC DLL as controller is buggy and this operation my
introduce glitches in the controller leading to undefined behavior.

Fixes: f0bbf17958 ("ARM: at91: pm: add self-refresh support for sama7g5")
Depends-on: a02875c4cb ("ARM: at91: pm: fix self-refresh for sama7g5")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221026124114.985876-2-claudiu.beznea@microchip.com
This commit is contained in:
Claudiu Beznea
2022-10-26 15:41:04 +03:00
parent 0873509ea6
commit cef8cdc0d0
2 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/soc/at91/sama7-ddr.h
View File

@@ -26,7 +26,10 @@
#define DDR3PHY_PGSR (0x0C) /* DDR3PHY PHY General Status Register */
#define DDR3PHY_PGSR_IDONE (1 << 0) /* Initialization Done */
#define DDR3PHY_ACIOCR (0x24) /* DDR3PHY AC I/O Configuration Register */
#define DDR3PHY_ACDLLCR (0x14) /* DDR3PHY AC DLL Control Register */
#define DDR3PHY_ACDLLCR_DLLSRST (1 << 30) /* DLL Soft Reset */
#define DDR3PHY_ACIOCR (0x24) /* DDR3PHY AC I/O Configuration Register */
#define DDR3PHY_ACIOCR_CSPDD_CS0 (1 << 18) /* CS#[0] Power Down Driver */
#define DDR3PHY_ACIOCR_CKPDD_CK0 (1 << 8) /* CK[0] Power Down Driver */
#define DDR3PHY_ACIORC_ACPDD (1 << 3) /* AC Power Down Driver */