redonkable/alistair23-linux
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firmware: imx: scu-pd: ignore power domain not owned

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Should not register power domain that not owned by current
partition.

Alought power domains will not be registered when power on failure,
we have to let CPU waste more cycles.

Whether power on or owned check, both need communicate with SCU,
but with owned check, we no need to run more code path to save CPU
cycles.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Peng Fan 2020-09-08 18:07:01 +08:00 committed by Shawn Guo
parent b663b798d0
commit e2314cf5af
1 changed files with 4 additions and 0 deletions
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4
drivers/firmware/imx/scu-pd.c
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@ -46,6 +46,7 @@
#include <dt-bindings/firmware/imx/rsrc.h>
#include <linux/firmware/imx/sci.h>
#include <linux/firmware/imx/svc/rm.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
@ -256,6 +257,9 @@ imx_scu_add_pm_domain(struct device *dev, int idx,
struct imx_sc_pm_domain *sc_pd;
int ret;
if (!imx_sc_rm_is_resource_owned(pm_ipc_handle, pd_ranges->rsrc + idx))
return NULL;
sc_pd = devm_kzalloc(dev, sizeof(*sc_pd), GFP_KERNEL);
if (!sc_pd)
return ERR_PTR(-ENOMEM);