From: Jamie Iles quic_jiles@quicinc.com
[ Upstream commit f31afb502c3151855df3ed40f5974c7884c10d14 ]
SBSA says of the generic watchdog:
All registers are 32 bits in size and should be accessed using 32-bit reads and writes. If an access size other than 32 bits is used then the results are IMPLEMENTATION DEFINED.
and for qemu, the implementation will only allow 32-bit accesses resulting in a synchronous external abort when configuring the watchdog. Use lo_hi_* accessors rather than a readq/writeq.
Fixes: abd3ac7902fb ("watchdog: sbsa: Support architecture version 1") Signed-off-by: Jamie Iles quic_jiles@quicinc.com Reviewed-by: Guenter Roeck linux@roeck-us.net Reviewed-by: Shaokun Zhang zhangshaokun@hisilicon.com Link: https://lore.kernel.org/r/20210903112101.493552-1-quic_jiles@quicinc.com Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Wim Van Sebroeck wim@linux-watchdog.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/watchdog/sbsa_gwdt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/sbsa_gwdt.c b/drivers/watchdog/sbsa_gwdt.c index ee9ff38929eb..6f4319bdbc50 100644 --- a/drivers/watchdog/sbsa_gwdt.c +++ b/drivers/watchdog/sbsa_gwdt.c @@ -130,7 +130,7 @@ static u64 sbsa_gwdt_reg_read(struct sbsa_gwdt *gwdt) if (gwdt->version == 0) return readl(gwdt->control_base + SBSA_GWDT_WOR); else - return readq(gwdt->control_base + SBSA_GWDT_WOR); + return lo_hi_readq(gwdt->control_base + SBSA_GWDT_WOR); }
static void sbsa_gwdt_reg_write(u64 val, struct sbsa_gwdt *gwdt) @@ -138,7 +138,7 @@ static void sbsa_gwdt_reg_write(u64 val, struct sbsa_gwdt *gwdt) if (gwdt->version == 0) writel((u32)val, gwdt->control_base + SBSA_GWDT_WOR); else - writeq(val, gwdt->control_base + SBSA_GWDT_WOR); + lo_hi_writeq(val, gwdt->control_base + SBSA_GWDT_WOR); }
/*