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author | Wade Farnsworth <wfarnsworth@mvista.com> | 2007-07-10 18:55:46 +0200 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2007-07-11 05:24:40 +0200 |
commit | 93ab471889c6662b42ce7da257f31f24c08d7d9e (patch) | |
tree | d1e665ac13b65c94ef5606787209e096a7d5793c /arch | |
parent | [POWERPC] Add H_ILLAN_ATTRIBUTES hcall number (diff) | |
download | linux-93ab471889c6662b42ce7da257f31f24c08d7d9e.tar.xz linux-93ab471889c6662b42ce7da257f31f24c08d7d9e.zip |
[POWERPC] Create add_rtc() function to enable the RTC CMOS driver
In order to use the RTC CMOS driver, each architecture must register a
platform device for the RTC.
This creates a function to register the platform device based on the RTC
device node and verifies that the RTC port against the hard-coded value
in asm/mc146818rtc.h.
Signed-off-by: Wade Farnsworth <wfarnsworth@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/sysdev/Makefile | 1 | ||||
-rw-r--r-- | arch/powerpc/sysdev/rtc_cmos_setup.c | 49 |
2 files changed, 50 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile index 7d8ac1bfef84..f65078c3d3b3 100644 --- a/arch/powerpc/sysdev/Makefile +++ b/arch/powerpc/sysdev/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o obj-$(CONFIG_QUICC_ENGINE) += qe_lib/ mv64x60-$(CONFIG_PCI) += mv64x60_pci.o obj-$(CONFIG_MV64X60) += $(mv64x60-y) mv64x60_pic.o mv64x60_dev.o +obj-$(CONFIG_RTC_DRV_CMOS) += rtc_cmos_setup.o # contains only the suspend handler for time ifeq ($(CONFIG_RTC_CLASS),) diff --git a/arch/powerpc/sysdev/rtc_cmos_setup.c b/arch/powerpc/sysdev/rtc_cmos_setup.c new file mode 100644 index 000000000000..e276048b8c5f --- /dev/null +++ b/arch/powerpc/sysdev/rtc_cmos_setup.c @@ -0,0 +1,49 @@ +/* + * Setup code for PC-style Real-Time Clock. + * + * Author: Wade Farnsworth <wfarnsworth@mvista.com> + * + * 2007 (c) MontaVista Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ + +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/mc146818rtc.h> + +#include <asm/prom.h> + +static int __init add_rtc(void) +{ + struct device_node *np; + struct platform_device *pd; + struct resource res; + int ret; + + np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00"); + if (!np) + return -ENODEV; + + ret = of_address_to_resource(np, 0, &res); + of_node_put(np); + if (ret) + return ret; + + /* + * RTC_PORT(x) is hardcoded in asm/mc146818rtc.h. Verify that the + * address provided by the device node matches. + */ + if (res.start != RTC_PORT(0)) + return -EINVAL; + + pd = platform_device_register_simple("rtc_cmos", -1, + &res, 1); + if (IS_ERR(pd)) + return PTR_ERR(pd); + + return 0; +} +fs_initcall(add_rtc); |