diff options
| author | Feng Tang <feng.tang@intel.com> | 2010-11-10 18:29:17 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-11-11 11:34:27 +0100 |
| commit | 0146f26145af75d53e12dbf23a36996aff373680 (patch) | |
| tree | 3eb42ef8ccbf1af5fb85695accd8b8e84ebe0634 /arch/x86/platform | |
| parent | x86: mrst: Add vrtc driver which serves as a wall clock device (diff) | |
| download | linux-0146f26145af75d53e12dbf23a36996aff373680.tar.xz linux-0146f26145af75d53e12dbf23a36996aff373680.zip | |
rtc: Add drivers/rtc/rtc-mrst.c
Provide the standard kernel rtc driver interface on top of the vrtc layer
added in the previous patch.
Signed-off-by: Feng Tang <feng.tang@intel.com>
LKML-Reference: <20101110172911.3311.20593.stgit@localhost.localdomain>
[Fixed swapped arguments on IPC]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
[Cleaned up and the device creation moved to arch/x86/platform]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/mrst/vrtc.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/x86/platform/mrst/vrtc.c b/arch/x86/platform/mrst/vrtc.c index 4944bd521d2c..4d3f770456f7 100644 --- a/arch/x86/platform/mrst/vrtc.c +++ b/arch/x86/platform/mrst/vrtc.c @@ -20,6 +20,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/sfi.h> +#include <linux/platform_device.h> #include <asm/mrst.h> #include <asm/mrst-vrtc.h> @@ -118,3 +119,48 @@ void __init mrst_rtc_init(void) x86_platform.get_wallclock = vrtc_get_time; x86_platform.set_wallclock = vrtc_set_mmss; } + +/* + * The Moorestown platform has a memory mapped virtual RTC device that emulates + * the programming interface of the RTC. + */ + +static struct resource vrtc_resources[] = { + [0] = { + .flags = IORESOURCE_MEM, + }, + [1] = { + .flags = IORESOURCE_IRQ, + } +}; + +static struct platform_device vrtc_device = { + .name = "rtc_mrst", + .id = -1, + .resource = vrtc_resources, + .num_resources = ARRAY_SIZE(vrtc_resources), +}; + +/* Register the RTC device if appropriate */ +static int __init mrst_device_create(void) +{ + /* No Moorestown, no device */ + if (!mrst_identify_cpu()) + return -ENODEV; + /* No timer, no device */ + if (!sfi_mrtc_num) + return -ENODEV; + + /* iomem resource */ + vrtc_resources[0].start = sfi_mrtc_array[0].phys_addr; + vrtc_resources[0].end = sfi_mrtc_array[0].phys_addr + + MRST_VRTC_MAP_SZ; + /* irq resource */ + vrtc_resources[1].start = sfi_mrtc_array[0].irq; + vrtc_resources[1].end = sfi_mrtc_array[0].irq; + + platform_device_register(&vrtc_device); + return 0; +} + +module_init(mrst_device_create); |