platform/olpc/olpc-xo1-pm.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Support for power management features of the OLPC XO-1 laptop
16 #include <linux/olpc-ec.h>
21 #define DRV_NAME "olpc-xo1-pm"
33 /* Set bits in the wakeup mask */
40 /* Clear bits in the wakeup mask */
53 		return -EINVAL;  in xo1_power_state_enter()
56 	 * Save SCI mask (this gets lost since PM1_EN is used as a mask for  in xo1_power_state_enter()
57 	 * wakeup events, which is not necessarily the same event set)  in xo1_power_state_enter()
67 	/* Restore SCI mask (using dword access to CS5536_PM1_EN) */  in xo1_power_state_enter()
77 	/* Program wakeup mask (using dword access to CS5536_PM1_EN) */  in xo1_do_sleep()
92 	printk(KERN_INFO "OLPC XO-1 power off sequence...\n");  in xo1_power_off()
110 	/* suspend-to-RAM only */  in xo1_power_state_valid()
115 	.valid = xo1_power_state_valid,
123 	/* don't run on non-XOs */  in xo1_pm_probe()
125 		return -ENODEV;  in xo1_pm_probe()
129 		dev_err(&pdev->dev, "can't fetch device resource info\n");  in xo1_pm_probe()
130 		return -EIO;  in xo1_pm_probe()
132 	if (strcmp(pdev->name, "cs5535-pms") == 0)  in xo1_pm_probe()
133 		pms_base = res->start;  in xo1_pm_probe()
134 	else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0)  in xo1_pm_probe()
135 		acpi_base = res->start;  in xo1_pm_probe()
141 		printk(KERN_INFO "OLPC XO-1 support registered\n");  in xo1_pm_probe()
149 	if (strcmp(pdev->name, "cs5535-pms") == 0)  in xo1_pm_remove()
151 	else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0)  in xo1_pm_remove()
159 		.name = "cs5535-pms",
167 		.name = "olpc-xo1-pm-acpi",