x86, olpc: Rename olpc-xo1 to olpc-xo1-pm
Based on earlier review comments, we'll no longer try to stick all of
our XO-1 goodies in a single driver. We'll split it into a power management
driver, and an EC/SCI driver.
As a first step, rename olpc-xo1 to olpc-xo1-pm, and make it builtin
instead of modular.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Link: http://lkml.kernel.org/r/1309019658-1712-4-git-send-email-dsd@laptop.org
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/platform/olpc/olpc-xo1-pm.c b/arch/x86/platform/olpc/olpc-xo1-pm.c
new file mode 100644
index 0000000..a2a59d3
--- /dev/null
+++ b/arch/x86/platform/olpc/olpc-xo1-pm.c
@@ -0,0 +1,123 @@
+/*
+ * Support for power management features of the OLPC XO-1 laptop
+ *
+ * Copyright (C) 2010 Andres Salomon <dilinger@queued.net>
+ * Copyright (C) 2010 One Laptop per Child
+ * Copyright (C) 2006 Red Hat, Inc.
+ * Copyright (C) 2006 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/cs5535.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/mfd/core.h>
+
+#include <asm/io.h>
+#include <asm/olpc.h>
+
+#define DRV_NAME "olpc-xo1-pm"
+
+static unsigned long acpi_base;
+static unsigned long pms_base;
+
+static void xo1_power_off(void)
+{
+ printk(KERN_INFO "OLPC XO-1 power off sequence...\n");
+
+ /* Enable all of these controls with 0 delay */
+ outl(0x40000000, pms_base + CS5536_PM_SCLK);
+ outl(0x40000000, pms_base + CS5536_PM_IN_SLPCTL);
+ outl(0x40000000, pms_base + CS5536_PM_WKXD);
+ outl(0x40000000, pms_base + CS5536_PM_WKD);
+
+ /* Clear status bits (possibly unnecessary) */
+ outl(0x0002ffff, pms_base + CS5536_PM_SSC);
+ outl(0xffffffff, acpi_base + CS5536_PM_GPE0_STS);
+
+ /* Write SLP_EN bit to start the machinery */
+ outl(0x00002000, acpi_base + CS5536_PM1_CNT);
+}
+
+static int __devinit xo1_pm_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ int err;
+
+ /* don't run on non-XOs */
+ if (!machine_is_olpc())
+ return -ENODEV;
+
+ err = mfd_cell_enable(pdev);
+ if (err)
+ return err;
+
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "can't fetch device resource info\n");
+ return -EIO;
+ }
+ if (strcmp(pdev->name, "cs5535-pms") == 0)
+ pms_base = res->start;
+ else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0)
+ acpi_base = res->start;
+
+ /* If we have both addresses, we can override the poweroff hook */
+ if (pms_base && acpi_base) {
+ pm_power_off = xo1_power_off;
+ printk(KERN_INFO "OLPC XO-1 support registered\n");
+ }
+
+ return 0;
+}
+
+static int __devexit xo1_pm_remove(struct platform_device *pdev)
+{
+ mfd_cell_disable(pdev);
+
+ if (strcmp(pdev->name, "cs5535-pms") == 0)
+ pms_base = 0;
+ else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0)
+ acpi_base = 0;
+
+ pm_power_off = NULL;
+ return 0;
+}
+
+static struct platform_driver cs5535_pms_driver = {
+ .driver = {
+ .name = "cs5535-pms",
+ .owner = THIS_MODULE,
+ },
+ .probe = xo1_pm_probe,
+ .remove = __devexit_p(xo1_pm_remove),
+};
+
+static struct platform_driver cs5535_acpi_driver = {
+ .driver = {
+ .name = "olpc-xo1-pm-acpi",
+ .owner = THIS_MODULE,
+ },
+ .probe = xo1_pm_probe,
+ .remove = __devexit_p(xo1_pm_remove),
+};
+
+static int __init xo1_pm_init(void)
+{
+ int r;
+
+ r = platform_driver_register(&cs5535_pms_driver);
+ if (r)
+ return r;
+
+ r = platform_driver_register(&cs5535_acpi_driver);
+ if (r)
+ platform_driver_unregister(&cs5535_pms_driver);
+
+ return r;
+}
+arch_initcall(xo1_pm_init);