From 10942019040c5557556ec22aae0f771b2a1a1a6d Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Tue, 1 Sep 2020 16:28:58 +0200 Subject: firmware: psci: Extend psci_set_osi_mode() to allow reset to PC mode The current user (cpuidle-psci) of psci_set_osi_mode() only needs to enable the PSCI OSI mode. Although, as subsequent changes shows, there is a need to be able to reset back into the PSCI PC mode. Therefore, let's extend psci_set_osi_mode() to take a bool as in-parameter, to let the user indicate whether to enable OSI or to switch back to PC mode. Reviewed-by: Sudeep Holla Signed-off-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki --- drivers/cpuidle/cpuidle-psci-domain.c | 2 +- drivers/firmware/psci/psci.c | 12 +++++++----- include/linux/psci.h | 2 +- 3 files changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c index b6e9649ab0da..b6ab0415f450 100644 --- a/drivers/cpuidle/cpuidle-psci-domain.c +++ b/drivers/cpuidle/cpuidle-psci-domain.c @@ -278,7 +278,7 @@ static int psci_cpuidle_domain_probe(struct platform_device *pdev) goto remove_pd; /* Try to enable OSI mode. */ - ret = psci_set_osi_mode(); + ret = psci_set_osi_mode(true); if (ret) { pr_warn("failed to enable OSI mode: %d\n", ret); psci_pd_remove_topology(np); diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index 92013ecc2d9e..00af99b6f97c 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -151,12 +151,15 @@ static u32 psci_get_version(void) return invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0); } -int psci_set_osi_mode(void) +int psci_set_osi_mode(bool enable) { + unsigned long suspend_mode; int err; - err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, - PSCI_1_0_SUSPEND_MODE_OSI, 0, 0); + suspend_mode = enable ? PSCI_1_0_SUSPEND_MODE_OSI : + PSCI_1_0_SUSPEND_MODE_PC; + + err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, suspend_mode, 0, 0); return psci_to_linux_errno(err); } @@ -546,8 +549,7 @@ static int __init psci_1_0_init(struct device_node *np) pr_info("OSI mode supported.\n"); /* Default to PC mode. */ - invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, - PSCI_1_0_SUSPEND_MODE_PC, 0, 0); + psci_set_osi_mode(false); } return 0; diff --git a/include/linux/psci.h b/include/linux/psci.h index 14ad9b9ebcd6..2a1bfb890e58 100644 --- a/include/linux/psci.h +++ b/include/linux/psci.h @@ -18,7 +18,7 @@ bool psci_tos_resident_on(int cpu); int psci_cpu_suspend_enter(u32 state); bool psci_power_state_is_valid(u32 state); -int psci_set_osi_mode(void); +int psci_set_osi_mode(bool enable); bool psci_has_osi_support(void); struct psci_operations { -- cgit v1.2.3