From: Peng Fan <peng.fan@nxp.com>
Date: Wed, 16 Oct 2019 10:24:20 +0000 (+0000)
Subject: imx8m: clock: improve irq response latency
X-Git-Tag: v2020.01-rc2~19^2~21
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=eeca15a50aa454480d4a31ca20fd80ef620909ee;p=oweals%2Fu-boot.git

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 5c3f780127..04903510f0 100644
--- a/arch/arm/mach-imx/imx8m/clock_imx8mq.c
+++ b/arch/arm/mach-imx/imx8m/clock_imx8mq.c
@@ -806,6 +806,12 @@ int clock_init(void)
 	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