1 // SPDX-License-Identifier: GPL-2.0-only
8  * Gregory Clement <gregory.clement@free-electrons.com>
9  * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
16 #define pr_fmt(fmt) "mvebu-pmsu: " fmt
20 #include <linux/delay.h>
25 #include <linux/mvebu-pmsu.h>
73 /* PMSU delay registers */
104 	{ .compatible = "marvell,armada-370-pmsu", },
105 	{ .compatible = "marvell,armada-370-xp-pmsu", },
106 	{ .compatible = "marvell,armada-380-pmsu", },
130 	u32 code_len = mvebu_boot_wa_end - mvebu_boot_wa_start;  in mvebu_setup_boot_addr_wa()
139 		return -ENOMEM;  in mvebu_setup_boot_addr_wa()
151 		     sram_virt_base + code_len - 4);  in mvebu_setup_boot_addr_wa()
172 		ret = -ENOENT;  in mvebu_v7_pmsu_init()
176 	if (of_device_is_compatible(np, "marvell,armada-370-xp-pmsu")) {  in mvebu_v7_pmsu_init()
178 		res.start = res.start - PMSU_BASE_OFFSET;  in mvebu_v7_pmsu_init()
179 		res.end = res.start + PMSU_REG_SIZE - 1;  in mvebu_v7_pmsu_init()
183 				np->full_name)) {  in mvebu_v7_pmsu_init()
185 		ret = -EBUSY;  in mvebu_v7_pmsu_init()
195 		ret = -ENOMEM;  in mvebu_v7_pmsu_init()
211 	/* Enable L2 & Fabric powerdown in Deep-Idle mode - Fabric */  in mvebu_v7_pmsu_enable_l2_powerdown_onidle()
223 /* No locking is needed because we only access per-CPU registers */
230 		return -EINVAL;  in mvebu_v7_pmsu_idle_prepare()
233 	 * Adjust the PMSU configuration to wait for WFI signal, enable  in mvebu_v7_pmsu_idle_prepare()
234 	 * IRQ and FIQ as wakeup events, set wait for snoop queue empty  in mvebu_v7_pmsu_idle_prepare()
256 		/* Disable snoop disable by HW - SW is taking care of it */  in mvebu_v7_pmsu_idle_prepare()
294 	".arch	armv7-a\n\t"  in armada_370_xp_pmsu_idle_enter()
338 /* No locking is needed because we only access per-CPU registers */
381 	if (of_property_read_bool(np, "broken-idle")) {  in broken_idle()
382 		pr_warn("CPU idle is currently broken: disabling\n");  in broken_idle()
394 	np = of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric");  in armada_370_cpuidle_init()
396 		return -ENODEV;  in armada_370_cpuidle_init()
403 	 * idle state due to heavy L1/L2 cache cleanup operations  in armada_370_cpuidle_init()
416 	mvebu_v7_cpuidle_device.name = "cpuidle-armada-370";  in armada_370_cpuidle_init()
429 	pr_warn("CPU idle is currently broken on Armada 38x: disabling\n");  in armada_38x_cpuidle_init()
433 				     "marvell,armada-380-coherency-fabric");  in armada_38x_cpuidle_init()
435 		return -ENODEV;  in armada_38x_cpuidle_init()
443 				     "marvell,armada-380-mpcore-soc-ctrl");  in armada_38x_cpuidle_init()
445 		return -ENODEV;  in armada_38x_cpuidle_init()
456 	/* Set up delay */  in armada_38x_cpuidle_init()
465 	mvebu_v7_cpuidle_device.name = "cpuidle-armada-38x";  in armada_38x_cpuidle_init()
476 	np = of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric");  in armada_xp_cpuidle_init()
478 		return -ENODEV;  in armada_xp_cpuidle_init()
485 	mvebu_v7_cpuidle_device.name = "cpuidle-armada-xp";  in armada_xp_cpuidle_init()
503 	 * Currently the CPU idle support for Armada 38x is broken, as  in mvebu_v7_cpu_pm_init()
504 	 * the CPU hotplug uses some of the CPU idle functions it is  in mvebu_v7_cpu_pm_init()
543 	/* Prepare to enter idle */  in mvebu_pmsu_dfs_request_local()
555 	/* The fact of entering idle will trigger the DFS transition */  in mvebu_pmsu_dfs_request_local()
559 	 * We're back from idle, the DFS transition has completed,  in mvebu_pmsu_dfs_request_local()
560 	 * clear the idle wait indication.  in mvebu_pmsu_dfs_request_local()
599 		return -ETIME;  in mvebu_pmsu_dfs_request()