]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
pmdomain: imx: wait SSAR when i.MX93 power domain on
authorPeng Fan <peng.fan@nxp.com>
Wed, 14 Aug 2024 12:47:40 +0000 (20:47 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 29 Aug 2024 15:36:10 +0000 (17:36 +0200)
commit3f01867a3b9ebe901255e5b3db6fbbc15efd7ebf
tree386fbda4b7951fce6e283a534e73a293f00ed7bc
parentd11d730b2467c00781191bab69dd76ea001d8da0
pmdomain: imx: wait SSAR when i.MX93 power domain on

commit 52dd070c62e4ae2b5e7411b920e3f7a64235ecfb upstream.

With "quiet" set in bootargs, there is power domain failure:
"imx93_power_domain 44462400.power-domain: pd_off timeout: name:
 44462400.power-domain, stat: 4"

The current power on opertation takes ISO state as power on finished
flag, but it is wrong. Before powering on operation really finishes,
powering off comes and powering off will never finish because the last
powering on still not finishes, so the following powering off actually
not trigger hardware state machine to run. SSAR is the last step when
powering on a domain, so need to wait SSAR done when powering on.

Since EdgeLock Enclave(ELE) handshake is involved in the flow, enlarge
the waiting time to 10ms for both on and off to avoid timeout.

Cc: stable@vger.kernel.org
Fixes: 0a0f7cc25d4a ("soc: imx: add i.MX93 SRC power domain driver")
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20240814124740.2778952-1-peng.fan@oss.nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/pmdomain/imx/imx93-pd.c