ARM: bL_switcher: add kernel cmdline param to disable the switcher on boot
By adding no_bL_switcher to the kernel cmdline string, the switcher
won't be activated automatically at boot time. It is still possible
to activate it later with:
echo 1 > /sys/kernel/bL_switcher/active
Signed-off-by: Nicolas Pitre <nico@linaro.org>
diff --git a/arch/arm/common/bL_switcher.c b/arch/arm/common/bL_switcher.c
index 395f60f..cec825e 100644
--- a/arch/arm/common/bL_switcher.c
+++ b/arch/arm/common/bL_switcher.c
@@ -26,6 +26,7 @@
#include <linux/string.h>
#include <linux/sysfs.h>
#include <linux/irqchip/arm-gic.h>
+#include <linux/moduleparam.h>
#include <asm/smp_plat.h>
#include <asm/suspend.h>
@@ -521,6 +522,9 @@
#endif /* CONFIG_SYSFS */
+static bool no_bL_switcher;
+core_param(no_bL_switcher, no_bL_switcher, bool, 0644);
+
static int __init bL_switcher_init(void)
{
int ret;
@@ -530,9 +534,11 @@
return -EINVAL;
}
- ret = bL_switcher_enable();
- if (ret)
- return ret;
+ if (!no_bL_switcher) {
+ ret = bL_switcher_enable();
+ if (ret)
+ return ret;
+ }
#ifdef CONFIG_SYSFS
ret = bL_switcher_sysfs_init();