Commit e2314cf5 authored Sep 08, 2020 by Peng Fan Committed by Shawn Guo Sep 13, 2020

firmware: imx: scu-pd: ignore power domain not owned



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>

parent b663b798

drivers/firmware/imx/scu-pd.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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);

Admin message