Merge tag 'imx-soc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...

[cascardo/linux.git] / arch / arm / mach-imx / cpuidle-imx6q.c

diff --git a/arch/arm/mach-imx/cpuidle-imx6q.c b/arch/arm/mach-imx/cpuidle-imx6q.c
index 353bb87..db0f48c 100644 (file)
--- a/arch/arm/mach-imx/cpuidle-imx6q.c
+++ b/arch/arm/mach-imx/cpuidle-imx6q.c
@@ -10,6 +10,8 @@
 #include <linux/module.h>
 #include <asm/cpuidle.h>
 
+#include <soc/imx/cpuidle.h>
+
 #include "common.h"
 #include "cpuidle.h"
 #include "hardware.h"
@@ -62,6 +64,24 @@ static struct cpuidle_driver imx6q_cpuidle_driver = {
        .safe_state_index = 0,
 };
 
+/*
+ * i.MX6 Q/DL has an erratum (ERR006687) that prevents the FEC from waking the
+ * CPUs when they are in wait(unclocked) state. As the hardware workaround isn't
+ * applicable to all boards, disable the deeper idle state when the workaround
+ * isn't present and the FEC is in use.
+ */
+void imx6q_cpuidle_fec_irqs_used(void)
+{
+       imx6q_cpuidle_driver.states[1].disabled = true;
+}
+EXPORT_SYMBOL_GPL(imx6q_cpuidle_fec_irqs_used);
+
+void imx6q_cpuidle_fec_irqs_unused(void)
+{
+       imx6q_cpuidle_driver.states[1].disabled = false;
+}
+EXPORT_SYMBOL_GPL(imx6q_cpuidle_fec_irqs_unused);
+
 int __init imx6q_cpuidle_init(void)
 {
        /* Set INT_MEM_CLK_LPM bit to get a reliable WAIT mode support */