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Groups > linux.kernel > #1709333
| From | Yong Li <sdliyong@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] pinctrl: aspeed: Fix hardware strap register write logic |
| Date | 2017-08-11 09:30 +0200 |
| Message-ID | <udcyl-A7-9@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
The hardware strap register(SCU70) only accepts write ‘1’, to clear it to ‘0’, must set bits(write ‘1’) to SCU7C Signed-off-by: Yong Li <sdliyong@gmail.com> --- drivers/pinctrl/aspeed/pinctrl-aspeed.c | 9 +++++++-- drivers/pinctrl/aspeed/pinctrl-aspeed.h | 1 + 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed.c b/drivers/pinctrl/aspeed/pinctrl-aspeed.c index a86a4d6..4305052 100644 --- a/drivers/pinctrl/aspeed/pinctrl-aspeed.c +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed.c @@ -213,8 +213,13 @@ static int aspeed_sig_expr_set(const struct aspeed_sig_expr *expr, if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP2) continue; - ret = regmap_update_bits(maps[desc->ip], desc->reg, - desc->mask, val); + if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP1 && + val == 0) + ret = regmap_update_bits(maps[desc->ip], HW_REVISION_ID, + desc->mask, desc->mask); + else + ret = regmap_update_bits(maps[desc->ip], desc->reg, + desc->mask, val); if (ret) return ret; diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed.h b/drivers/pinctrl/aspeed/pinctrl-aspeed.h index fa125db..d4d7f03 100644 --- a/drivers/pinctrl/aspeed/pinctrl-aspeed.h +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed.h @@ -251,6 +251,7 @@ #define SCU3C 0x3C /* System Reset Control/Status Register */ #define SCU48 0x48 /* MAC Interface Clock Delay Setting */ #define HW_STRAP1 0x70 /* AST2400 strapping is 33 bits, is split */ +#define HW_REVISION_ID 0x7C /* Silicon revision ID register */ #define SCU80 0x80 /* Multi-function Pin Control #1 */ #define SCU84 0x84 /* Multi-function Pin Control #2 */ #define SCU88 0x88 /* Multi-function Pin Control #3 */ -- 2.7.4
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[PATCH] pinctrl: aspeed: Fix hardware strap register write logic Yong Li <sdliyong@gmail.com> - 2017-08-11 09:30 +0200 Re: [PATCH] pinctrl: aspeed: Fix hardware strap register write logic Andrew Jeffery <andrew@aj.id.au> - 2017-08-11 10:50 +0200
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