summaryrefslogtreecommitdiffstats
path: root/drivers/mmc/host/mmci.c
diff options
context:
space:
mode:
authorLinus Torvalds2012-05-25 17:23:32 +0200
committerLinus Torvalds2012-05-25 17:23:32 +0200
commit92bf3d09410531a06e06504957271e3978f937e2 (patch)
treee638413049deb010103bc65e2650d1315dbaa748 /drivers/mmc/host/mmci.c
parentopenrisc: use generic strncpy_from_user (diff)
parentmmc: at91-mci: this driver is now deprecated (diff)
downloadkernel-qcow2-linux-92bf3d09410531a06e06504957271e3978f937e2.tar.gz
kernel-qcow2-linux-92bf3d09410531a06e06504957271e3978f937e2.tar.xz
kernel-qcow2-linux-92bf3d09410531a06e06504957271e3978f937e2.zip
Merge tag 'mmc-merge-for-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Pull MMC changes from Chris Ball - at91-mci: This driver will be replaced by atmel-mci in 3.7. - atmel-mci: Add support for old at91-mci hardware. - dw_mmc: Allow multiple controllers; this previously caused corruption. - imxmmc: Remove this driver, replaced by mxcmmc. - mmci: Add device tree support. - omap: Allow multiple controllers. - omap_hsmmc: Auto CMD12, DDR support. - tegra: Support SD 3.0 spec. Fix up the usual trivial conflicts in feature-removal-schedule.txt * tag 'mmc-merge-for-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (38 commits) mmc: at91-mci: this driver is now deprecated mmc: omap_hsmmc: pass IRQF_ONESHOT to request_threaded_irq mmc: block: Allow disabling 512B sector size emulation mmc: atmel-mci: add debug logs mmc: atmel-mci: add support for version lower than v2xx mmc: atmel-mci: change the state machine for compatibility with old IP mmc: atmel-mci: the r/w proof capability lack was not well managed mmc: dw_mmc: Fixed sdio interrupt mask bit setting bug mmc: omap: convert to module_platform_driver mmc: omap: make it behave well as a module mmc: omap: convert to per instance workqueue mmc: core: Remove dead code mmc: card: Avoid null pointer dereference mmc: core: Prevent eMMC VCC supply to be cut from late init mmc: dw_mmc: make multiple instances of dw_mci_card_workqueue mmc: queue: remove redundant memsets mmc: queue: rename mmc_request function mmc: core: skip card initialization if power class selection fails mmc: core: fix the signaling 1.8V for HS200 mmc: core: fix the decision of HS200/DDR card-type ...
Diffstat (limited to 'drivers/mmc/host/mmci.c')
-rw-r--r--drivers/mmc/host/mmci.c65
1 files changed, 61 insertions, 4 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index b6f38421d541..f0fcce40cd8d 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -15,6 +15,7 @@
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/highmem.h>
@@ -25,6 +26,7 @@
#include <linux/clk.h>
#include <linux/scatterlist.h>
#include <linux/gpio.h>
+#include <linux/of_gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
@@ -1207,21 +1209,76 @@ static const struct mmc_host_ops mmci_ops = {
.get_cd = mmci_get_cd,
};
+#ifdef CONFIG_OF
+static void mmci_dt_populate_generic_pdata(struct device_node *np,
+ struct mmci_platform_data *pdata)
+{
+ int bus_width = 0;
+
+ pdata->gpio_wp = of_get_named_gpio(np, "wp-gpios", 0);
+ if (!pdata->gpio_wp)
+ pdata->gpio_wp = -1;
+
+ pdata->gpio_cd = of_get_named_gpio(np, "cd-gpios", 0);
+ if (!pdata->gpio_cd)
+ pdata->gpio_cd = -1;
+
+ if (of_get_property(np, "cd-inverted", NULL))
+ pdata->cd_invert = true;
+ else
+ pdata->cd_invert = false;
+
+ of_property_read_u32(np, "max-frequency", &pdata->f_max);
+ if (!pdata->f_max)
+ pr_warn("%s has no 'max-frequency' property\n", np->full_name);
+
+ if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL))
+ pdata->capabilities |= MMC_CAP_MMC_HIGHSPEED;
+ if (of_get_property(np, "mmc-cap-sd-highspeed", NULL))
+ pdata->capabilities |= MMC_CAP_SD_HIGHSPEED;
+
+ of_property_read_u32(np, "bus-width", &bus_width);
+ switch (bus_width) {
+ case 0 :
+ /* No bus-width supplied. */
+ break;
+ case 4 :
+ pdata->capabilities |= MMC_CAP_4_BIT_DATA;
+ break;
+ case 8 :
+ pdata->capabilities |= MMC_CAP_8_BIT_DATA;
+ break;
+ default :
+ pr_warn("%s: Unsupported bus width\n", np->full_name);
+ }
+}
+#else
+static void mmci_dt_populate_generic_pdata(struct device_node *np,
+ struct mmci_platform_data *pdata)
+{
+ return;
+}
+#endif
+
static int __devinit mmci_probe(struct amba_device *dev,
const struct amba_id *id)
{
struct mmci_platform_data *plat = dev->dev.platform_data;
+ struct device_node *np = dev->dev.of_node;
struct variant_data *variant = id->data;
struct mmci_host *host;
struct mmc_host *mmc;
int ret;
- /* must have platform data */
- if (!plat) {
- ret = -EINVAL;
- goto out;
+ /* Must have platform data or Device Tree. */
+ if (!plat && !np) {
+ dev_err(&dev->dev, "No plat data or DT found\n");
+ return -EINVAL;
}
+ if (np)
+ mmci_dt_populate_generic_pdata(np, plat);
+
ret = amba_request_regions(dev, DRIVER_NAME);
if (ret)
goto out;