Re: [RFC PATCH v2 30/31] kvx: Add power controller driver

From: Jules Maselbas <jmaselbas(a)kalray.eu&gt; The Power Controller (pwr-ctrl) control cores reset and wake-up procedure.

+ +static struct device_node * __init get_pwr_ctrl_node(void) +{ + const phandle *ph; + struct device_node *cpu; + struct device_node *node; + + cpu = of_get_cpu_node(raw_smp_processor_id(), NULL); + if (!cpu) { + pr_err("Failed to get CPU node\n"); + return NULL; + } + + ph = of_get_property(cpu, "power-controller", NULL); + if (!ph) { + pr_err("Failed to get power-controller phandle\n"); + return NULL; + } + + node = of_find_node_by_phandle(be32_to_cpup(ph)); + if (!node) { + pr_err("Failed to get power-controller node\n"); + return NULL; + } + + return node; +} + +int __init kvx_pwr_ctrl_probe(void) +{ + struct device_node *ctrl; + + ctrl = get_pwr_ctrl_node(); + if (!ctrl) { + pr_err("Failed to get power controller node\n"); + return -EINVAL; + } + + if (!of_device_is_compatible(ctrl, "kalray,kvx-pwr-ctrl")) { + pr_err("Failed to get power controller node\n");