[PATCH v8 15/26] drivers: firmware: psci: Split psci_dt_cpu_init_idle()
From: Ulf Hansson <hidden>
Date: 2018-06-20 17:26:08
Also in:
linux-arm-msm, linux-pm, lkml
Subsystem:
power state coordination interface (psci), the rest · Maintainers:
Mark Rutland, Lorenzo Pieralisi, Linus Torvalds
Let's split psci_dt_cpu_init_idle() function into two functions, as to allow following changes to re-use some of the code. Cc: Lina Iyer <redacted> Co-developed-by: Lina Iyer <redacted> Signed-off-by: Ulf Hansson <redacted> --- drivers/firmware/psci/psci.c | 42 ++++++++++++++++++++---------------- 1 file changed, 23 insertions(+), 19 deletions(-)
diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index c80ec1d03274..9788bfc1cf8b 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c@@ -270,9 +270,26 @@ static int __init psci_features(u32 psci_func_id) #ifdef CONFIG_CPU_IDLE static DEFINE_PER_CPU_READ_MOSTLY(u32 *, psci_power_state); +static int psci_dt_parse_state_node(struct device_node *np, u32 *state) +{ + int err = of_property_read_u32(np, "arm,psci-suspend-param", state); + + if (err) { + pr_warn("%pOF missing arm,psci-suspend-param property\n", np); + return err; + } + + if (!psci_power_state_is_valid(*state)) { + pr_warn("Invalid PSCI power state %#x\n", *state); + return -EINVAL; + } + + return 0; +} + static int psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu) { - int i, ret, count = 0; + int i, ret = 0, count = 0; u32 *psci_states; struct device_node *state_node;
@@ -291,29 +308,16 @@ static int psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu) return -ENOMEM; for (i = 0; i < count; i++) { - u32 state; - state_node = of_parse_phandle(cpu_node, "cpu-idle-states", i); + ret = psci_dt_parse_state_node(state_node, &psci_states[i]); + of_node_put(state_node); - ret = of_property_read_u32(state_node, - "arm,psci-suspend-param", - &state); - if (ret) { - pr_warn(" * %pOF missing arm,psci-suspend-param property\n", - state_node); - of_node_put(state_node); + if (ret) goto free_mem; - } - of_node_put(state_node); - pr_debug("psci-power-state %#x index %d\n", state, i); - if (!psci_power_state_is_valid(state)) { - pr_warn("Invalid PSCI power state %#x\n", state); - ret = -EINVAL; - goto free_mem; - } - psci_states[i] = state; + pr_debug("psci-power-state %#x index %d\n", psci_states[i], i); } + /* Idle states parsed correctly, initialize per-cpu pointer */ per_cpu(psci_power_state, cpu) = psci_states; return 0;
--
2.17.1