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Merge branch 'merge-spi' of git://git.secretlab.ca/git/linux-2.6 

* 'merge-spi' of git://git.secretlab.ca/git/linux-2.6:
  spi/m68knommu: Coldfire QSPI platform support
  spi/omap2_mcspi.c: Force CS to be in inactive state after off-mode transition
This commit is contained in:
Linus Torvalds 2010-12-30 10:07:44 -08:00
parent ebb76ce16d 0bc463426a
commit ff20f1779b
2 changed files with 40 additions and 1 deletions
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2
drivers/spi/coldfire_qspi.c
View File

@ -317,7 +317,7 @@ static void mcfqspi_work(struct work_struct *work)
msg = container_of(mcfqspi->msgq.next, struct spi_message,
queue);
list_del_init(&mcfqspi->msgq);
list_del_init(&msg->queue);
spin_unlock_irqrestore(&mcfqspi->lock, flags);
spi = msg->spi;

39
drivers/spi/omap2_mcspi.c
View File

@ -1305,10 +1305,49 @@ static int __exit omap2_mcspi_remove(struct platform_device *pdev)
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:omap2_mcspi");
#ifdef CONFIG_SUSPEND
/*
* When SPI wake up from off-mode, CS is in activate state. If it was in
* unactive state when driver was suspend, then force it to unactive state at
* wake up.
*/
static int omap2_mcspi_resume(struct device *dev)
{
struct spi_master *master = dev_get_drvdata(dev);
struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
struct omap2_mcspi_cs *cs;
omap2_mcspi_enable_clocks(mcspi);
list_for_each_entry(cs, &omap2_mcspi_ctx[master->bus_num - 1].cs,
node) {
if ((cs->chconf0 & OMAP2_MCSPI_CHCONF_FORCE) == 0) {
/*
* We need to toggle CS state for OMAP take this
* change in account.
*/
MOD_REG_BIT(cs->chconf0, OMAP2_MCSPI_CHCONF_FORCE, 1);
__raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
MOD_REG_BIT(cs->chconf0, OMAP2_MCSPI_CHCONF_FORCE, 0);
__raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
}
}
omap2_mcspi_disable_clocks(mcspi);
return 0;
}
#else
#define omap2_mcspi_resume NULL
#endif
static const struct dev_pm_ops omap2_mcspi_pm_ops = {
.resume = omap2_mcspi_resume,
};
static struct platform_driver omap2_mcspi_driver = {
.driver = {
.name = "omap2_mcspi",
.owner = THIS_MODULE,
.pm = &omap2_mcspi_pm_ops
},
.remove = __exit_p(omap2_mcspi_remove),
};