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- #include <linux/init.h>
- #include <linux/cpuidle.h>
- #include <linux/platform_device.h>
- #include <asm/cpuidle.h>
- #define ZYNQ_MAX_STATES 2
- static int zynq_enter_idle(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index)
- {
-
- cpu_do_idle();
- return index;
- }
- static struct cpuidle_driver zynq_idle_driver = {
- .name = "zynq_idle",
- .owner = THIS_MODULE,
- .states = {
- ARM_CPUIDLE_WFI_STATE,
- {
- .enter = zynq_enter_idle,
- .exit_latency = 10,
- .target_residency = 10000,
- .name = "RAM_SR",
- .desc = "WFI and RAM Self Refresh",
- },
- },
- .safe_state_index = 0,
- .state_count = ZYNQ_MAX_STATES,
- };
- static int zynq_cpuidle_probe(struct platform_device *pdev)
- {
- pr_info("Xilinx Zynq CpuIdle Driver started\n");
- return cpuidle_register(&zynq_idle_driver, NULL);
- }
- static struct platform_driver zynq_cpuidle_driver = {
- .driver = {
- .name = "cpuidle-zynq",
- },
- .probe = zynq_cpuidle_probe,
- };
- builtin_platform_driver(zynq_cpuidle_driver);
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