imx8m: clock: improve irq response latency
Improve the IRQ response latency by setting GIC root clock source to
sys_pll2_200m from osc.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/imx8m/clock_imx8mq.c b/arch/arm/mach-imx/imx8m/clock_imx8mq.c
index 5c3f780..0490351 100644
--- a/arch/arm/mach-imx/imx8m/clock_imx8mq.c
+++ b/arch/arm/mach-imx/imx8m/clock_imx8mq.c
@@ -806,6 +806,12 @@
clock_enable(CCGR_TSENSOR, 1);
clock_enable(CCGR_OCOTP, 1);
+ /* config GIC ROOT to sys_pll2_200m */
+ clock_enable(CCGR_GIC, 0);
+ clock_set_target_val(GIC_CLK_ROOT,
+ CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(1));
+ clock_enable(CCGR_GIC, 1);
+
return 0;
}
#endif