The SIMATIC IPC277E uses the PMC clock for on-board components
and gets stuck during boot if the clock is disabled. Therefore,
add this device to the critical systems list.
Tested on SIMATIC IPC277E.
Fixes: 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
Reviewed-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Cc: Cedric Hombourger <Cedric_Hombourger@xxxxxxxxxx>
Signed-off-by: Srikanth Krishnakar <Srikanth_Krishnakar@xxxxxxxxxx>
---
Suggested for linux-stable v4.14.x and above.
Depends on ad0d315b4d4e ("platform/x86: pmc_atom: Add Siemens SIMATIC IPC227E to critclk_systems DMI table")
drivers/platform/x86/pmc_atom.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/platform/x86/pmc_atom.c b/drivers/platform/x86/pmc_atom.c
index 9aca5e7ce6d0..07d1b911e72f 100644
--- a/drivers/platform/x86/pmc_atom.c
+++ b/drivers/platform/x86/pmc_atom.c
@@ -422,6 +422,13 @@ static const struct dmi_system_id critclk_systems[] = {
DMI_MATCH(DMI_PRODUCT_VERSION, "6ES7647-8B"),
},
},
+ {
+ .ident = "SIMATIC IPC277E",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "6AV7882-0"),
+ },
+ },
{ /*sentinel*/ }
};
--
2.17.1
