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Diffstat (limited to 'arch/arm/mach-imx/cpuidle-imx6sl.c')
-rw-r--r--arch/arm/mach-imx/cpuidle-imx6sl.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/cpuidle-imx6sl.c b/arch/arm/mach-imx/cpuidle-imx6sl.c
new file mode 100644
index 000000000..b86ffbeb2
--- /dev/null
+++ b/arch/arm/mach-imx/cpuidle-imx6sl.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ */
+
+#include <linux/clk/imx.h>
+#include <linux/cpuidle.h>
+#include <linux/module.h>
+#include <asm/cpuidle.h>
+
+#include "common.h"
+#include "cpuidle.h"
+
+static int imx6sl_enter_wait(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ imx6_set_lpm(WAIT_UNCLOCKED);
+ /*
+ * Software workaround for ERR005311, see function
+ * description for details.
+ */
+ imx6sl_set_wait_clk(true);
+ cpu_do_idle();
+ imx6sl_set_wait_clk(false);
+ imx6_set_lpm(WAIT_CLOCKED);
+
+ return index;
+}
+
+static struct cpuidle_driver imx6sl_cpuidle_driver = {
+ .name = "imx6sl_cpuidle",
+ .owner = THIS_MODULE,
+ .states = {
+ /* WFI */
+ ARM_CPUIDLE_WFI_STATE,
+ /* WAIT */
+ {
+ .exit_latency = 50,
+ .target_residency = 75,
+ .flags = CPUIDLE_FLAG_TIMER_STOP,
+ .enter = imx6sl_enter_wait,
+ .name = "WAIT",
+ .desc = "Clock off",
+ },
+ },
+ .state_count = 2,
+ .safe_state_index = 0,
+};
+
+int __init imx6sl_cpuidle_init(void)
+{
+ return cpuidle_register(&imx6sl_cpuidle_driver, NULL);
+}