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armv7: Add workaround for USB erratum A-008997

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Low Frequency Periodic Singaling (LFPS) Peak-to-Peak Differential
Output Voltage Test Compliance fails using default transmitter settings

Change config of transmitter signal swings by setting register
PCSTXSWINGFULL to 0x47 to pass compliance tests.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Suresh Gupta <suresh.gupta@nxp.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
[YS: Reordered Kconfig options]
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Ran Wang
2017-09-04 18:46:54 +08:00
committed by York Sun
parent c1853f6f73
commit e10d114279
3 changed files with 22 additions and 0 deletions
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3
arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
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@@ -178,6 +178,9 @@ struct ccsr_gur {
#define SCFG_USB3PRM1CR 0x070
#define SCFG_USB_TXVREFTUNE 0x9
#define SCFG_USB_SQRXTUNE_MASK 0x7
#define SCFG_USB3PRM2CR 0x074
#define SCFG_USB_PCSTXSWINGFULL_MASK 0x0000FE00
#define SCFG_USB_PCSTXSWINGFULL_VAL 0x00008E00
/* Supplemental Configuration Unit */
struct ccsr_scfg {