2022-09-27 10:43:36

by Qiang Yu

Subject: [PATCH] bus: mhi: host: Use mhi_soc_reset() API in place of register write

Currently, a direct register write is used when ramdump collection
in panic path occurs. Replace that with new mhi_soc_reset() API
such that a controller defined reset() function is exercised if
one is present and the regular SOC reset is done if it is not.

Signed-off-by: Qiang Yu <[email protected]>
---
drivers/bus/mhi/host/boot.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/bus/mhi/host/boot.c b/drivers/bus/mhi/host/boot.c
index 5bed8b51..79a0eec 100644
--- a/drivers/bus/mhi/host/boot.c
+++ b/drivers/bus/mhi/host/boot.c
@@ -118,9 +118,7 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
/* Hardware reset so force device to enter RDDM */
dev_dbg(dev,
"Did not enter RDDM, do a host req reset\n");
- mhi_write_reg(mhi_cntrl, mhi_cntrl->regs,
- MHI_SOC_RESET_REQ_OFFSET,
- MHI_SOC_RESET_REQ);
+ mhi_soc_reset(mhi_cntrl);
udelay(delayus);
}

--
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2022-09-27 14:46:28

by Jeffrey Hugo

Subject: Re: [PATCH] bus: mhi: host: Use mhi_soc_reset() API in place of register write

On 9/27/2022 3:48 AM, Qiang Yu wrote:
> Currently, a direct register write is used when ramdump collection
> in panic path occurs. Replace that with new mhi_soc_reset() API
> such that a controller defined reset() function is exercised if
> one is present and the regular SOC reset is done if it is not.
>
> Signed-off-by: Qiang Yu <[email protected]>
> ---

Reviewed-by: Jeffrey Hugo <[email protected]>