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ARM: device tree work

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Most of these patches convert code from using static platform data to
 describing the hardware in the device tree. This is only the first
 half of the changes for v3.4 because a lot of patches for this topic
 came in the last week before the merge window.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: device tree work" from Arnd Bergmann:
 "Most of these patches convert code from using static platform data to
  describing the hardware in the device tree.  This is only the first
  half of the changes for v3.4 because a lot of patches for this topic
  came in the last week before the merge window.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

Fix up trivial conflicts in arch/arm/mach-vexpress/{Kconfig,core.h}

* tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (86 commits)
  Document: devicetree: add OF documents for arch-mmp
  ARM: dts: append DTS file of pxa168
  ARM: mmp: append OF support on pxa168
  ARM: mmp: enable rtc clk in pxa168
  i2c: pxa: add OF support
  serial: pxa: add OF support
  arm/dts: mt_ventoux: very basic support for TeeJet Mt.Ventoux board
  ARM: OMAP2+: Remove extra ifdefs for board-generic
  ARM: OMAP2+: Fix build error when only ARCH_OMAP2/3 or 4 is selected
  ASoC: DT: Add digital microphone binding to PAZ00 board.
  ARM: dt: Add ARM PMU to tegra*.dtsi
  ARM: at91: at91sam9x5cm/dt: add leds support
  ARM: at91: usb_a9g20/dt: add gpio-keys support
  ARM: at91: at91sam9m10g45ek/dt: add gpio-keys support
  ARM: at91: at91sam9m10g45ek/dt: add leds support
  ARM: at91: usb_a9g20/dt: add leds support
  ARM: at91/pio: add new PIO3 features
  ARM: at91: add sam9_smc.o to at91sam9x5 build
  ARM: at91/tc/clocksource: Add 32 bit variant to Timer Counter
  ARM: at91/tc: add device tree support to atmel_tclib
  ...
This commit is contained in:
Linus Torvalds 2012-03-27 16:47:35 -07:00
commit 66f03c614c
147 changed files with 5060 additions and 1080 deletions
Download patch file Download diff file Expand all files Collapse all files

85
drivers/rtc/rtc-at91sam9.c
View file

@ -57,6 +57,7 @@ struct sam9_rtc {
void __iomem *rtt;
struct rtc_device *rtcdev;
u32 imr;
void __iomem *gpbr;
};
#define rtt_readl(rtc, field) \
@ -65,9 +66,9 @@ struct sam9_rtc {
__raw_writel((val), (rtc)->rtt + AT91_RTT_ ## field)
#define gpbr_readl(rtc) \
at91_sys_read(AT91_GPBR + 4 * CONFIG_RTC_DRV_AT91SAM9_GPBR)
__raw_readl((rtc)->gpbr)
#define gpbr_writel(rtc, val) \
at91_sys_write(AT91_GPBR + 4 * CONFIG_RTC_DRV_AT91SAM9_GPBR, (val))
__raw_writel((val), (rtc)->gpbr)
/*
* Read current time and date in RTC
@ -287,16 +288,19 @@ static const struct rtc_class_ops at91_rtc_ops = {
/*
* Initialize and install RTC driver
*/
static int __init at91_rtc_probe(struct platform_device *pdev)
static int __devinit at91_rtc_probe(struct platform_device *pdev)
{
struct resource *r;
struct resource *r, *r_gpbr;
struct sam9_rtc *rtc;
int ret;
u32 mr;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r)
r_gpbr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!r || !r_gpbr) {
dev_err(&pdev->dev, "need 2 ressources\n");
return -ENODEV;
}
rtc = kzalloc(sizeof *rtc, GFP_KERNEL);
if (!rtc)
@ -314,6 +318,13 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
goto fail;
}
rtc->gpbr = ioremap(r_gpbr->start, resource_size(r_gpbr));
if (!rtc->gpbr) {
dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n");
ret = -ENOMEM;
goto fail_gpbr;
}
mr = rtt_readl(rtc, MR);
/* unless RTT is counting at 1 Hz, re-initialize it */
@ -340,7 +351,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
if (ret) {
dev_dbg(&pdev->dev, "can't share IRQ %d?\n", AT91_ID_SYS);
rtc_device_unregister(rtc->rtcdev);
goto fail;
goto fail_register;
}
/* NOTE: sam9260 rev A silicon has a ROM bug which resets the
@ -356,6 +367,8 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
return 0;
fail_register:
iounmap(rtc->gpbr);
fail_gpbr:
iounmap(rtc->rtt);
fail:
platform_set_drvdata(pdev, NULL);
@ -366,7 +379,7 @@ fail:
/*
* Disable and remove the RTC driver
*/
static int __exit at91_rtc_remove(struct platform_device *pdev)
static int __devexit at91_rtc_remove(struct platform_device *pdev)
{
struct sam9_rtc *rtc = platform_get_drvdata(pdev);
u32 mr = rtt_readl(rtc, MR);
@ -377,6 +390,7 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
rtc_device_unregister(rtc->rtcdev);
iounmap(rtc->gpbr);
iounmap(rtc->rtt);
platform_set_drvdata(pdev, NULL);
kfree(rtc);
@ -440,63 +454,20 @@ static int at91_rtc_resume(struct platform_device *pdev)
#endif
static struct platform_driver at91_rtc_driver = {
.driver.name = "rtc-at91sam9",
.driver.owner = THIS_MODULE,
.remove = __exit_p(at91_rtc_remove),
.probe = at91_rtc_probe,
.remove = __devexit_p(at91_rtc_remove),
.shutdown = at91_rtc_shutdown,
.suspend = at91_rtc_suspend,
.resume = at91_rtc_resume,
.driver = {
.name = "rtc-at91sam9",
.owner = THIS_MODULE,
},
};
/* Chips can have more than one RTT module, and they can be used for more
* than just RTCs. So we can't just register as "the" RTT driver.
*
* A normal approach in such cases is to create a library to allocate and
* free the modules. Here we just use bus_find_device() as like such a
* library, binding directly ... no runtime "library" footprint is needed.
*/
static int __init at91_rtc_match(struct device *dev, void *v)
{
struct platform_device *pdev = to_platform_device(dev);
int ret;
/* continue searching if this isn't the RTT we need */
if (strcmp("at91_rtt", pdev->name) != 0
|| pdev->id != CONFIG_RTC_DRV_AT91SAM9_RTT)
goto fail;
/* else we found it ... but fail unless we can bind to the RTC driver */
if (dev->driver) {
dev_dbg(dev, "busy, can't use as RTC!\n");
goto fail;
}
dev->driver = &at91_rtc_driver.driver;
if (device_attach(dev) == 0) {
dev_dbg(dev, "can't attach RTC!\n");
goto fail;
}
ret = at91_rtc_probe(pdev);
if (ret == 0)
return true;
dev_dbg(dev, "RTC probe err %d!\n", ret);
fail:
return false;
}
static int __init at91_rtc_init(void)
{
int status;
struct device *rtc;
status = platform_driver_register(&at91_rtc_driver);
if (status)
return status;
rtc = bus_find_device(&platform_bus_type, NULL,
NULL, at91_rtc_match);
if (!rtc)
platform_driver_unregister(&at91_rtc_driver);
return rtc ? 0 : -ENODEV;
return platform_driver_register(&at91_rtc_driver);
}
module_init(at91_rtc_init);