summaryrefslogtreecommitdiffstats
path: root/drivers/mmc/host/sdhci-pxav2.c
diff options
context:
space:
mode:
authorChris Ball <cjb@laptop.org>2012-04-10 22:34:33 -0400
committerChris Ball <cjb@laptop.org>2012-07-21 00:01:47 -0400
commitb650352dd3df36164e3427bff3f33bc06ac47642 (patch)
tree883219dd446358996e8860027bb712e258f2554c /drivers/mmc/host/sdhci-pxav2.c
parented3efc1ccc4421865b64d902cd410f6733c85a49 (diff)
mmc: sdhci-pxa: Add device tree support
Tested on an OLPC XO-1.75. (MMP2, sdhci-pxav3, CONFIG_MACH_MMP2_DT=y) Signed-off-by: Chris Ball <cjb@laptop.org> Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Diffstat (limited to 'drivers/mmc/host/sdhci-pxav2.c')
-rw-r--r--drivers/mmc/host/sdhci-pxav2.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pxav2.c b/drivers/mmc/host/sdhci-pxav2.c
index dbb75bfbcff..b6ee8857e22 100644
--- a/drivers/mmc/host/sdhci-pxav2.c
+++ b/drivers/mmc/host/sdhci-pxav2.c
@@ -28,6 +28,9 @@
#include <linux/mmc/host.h>
#include <linux/platform_data/pxa_sdhci.h>
#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
#include "sdhci.h"
#include "sdhci-pltfm.h"
@@ -121,6 +124,48 @@ static struct sdhci_ops pxav2_sdhci_ops = {
.platform_8bit_width = pxav2_mmc_set_width,
};
+#ifdef CONFIG_OF
+static const struct of_device_id sdhci_pxav2_of_match[] = {
+ {
+ .compatible = "mrvl,pxav2-mmc",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sdhci_pxav2_of_match);
+
+static struct sdhci_pxa_platdata *pxav2_get_mmc_pdata(struct device *dev)
+{
+ struct sdhci_pxa_platdata *pdata;
+ struct device_node *np = dev->of_node;
+ u32 bus_width;
+ u32 clk_delay_cycles;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ if (of_find_property(np, "non-removable", NULL))
+ pdata->flags |= PXA_FLAG_CARD_PERMANENT;
+
+ of_property_read_u32(np, "bus-width", &bus_width);
+ if (bus_width == 8)
+ pdata->flags |= PXA_FLAG_SD_8_BIT_CAPABLE_SLOT;
+
+ of_property_read_u32(np, "mrvl,clk-delay-cycles", &clk_delay_cycles);
+ if (clk_delay_cycles > 0) {
+ pdata->clk_delay_sel = 1;
+ pdata->clk_delay_cycles = clk_delay_cycles;
+ }
+
+ return pdata;
+}
+#else
+static inline struct sdhci_pxa_platdata *pxav2_get_mmc_pdata(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
static int __devinit sdhci_pxav2_probe(struct platform_device *pdev)
{
struct sdhci_pltfm_host *pltfm_host;
@@ -128,6 +173,8 @@ static int __devinit sdhci_pxav2_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct sdhci_host *host = NULL;
struct sdhci_pxa *pxa = NULL;
+ const struct of_device_id *match;
+
int ret;
struct clk *clk;
@@ -156,6 +203,10 @@ static int __devinit sdhci_pxav2_probe(struct platform_device *pdev)
| SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
| SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN;
+ match = of_match_device(of_match_ptr(sdhci_pxav2_of_match), &pdev->dev);
+ if (match) {
+ pdata = pxav2_get_mmc_pdata(dev);
+ }
if (pdata) {
if (pdata->flags & PXA_FLAG_CARD_PERMANENT) {
/* on-chip device */
@@ -218,6 +269,9 @@ static struct platform_driver sdhci_pxav2_driver = {
.driver = {
.name = "sdhci-pxav2",
.owner = THIS_MODULE,
+#ifdef CONFIG_OF
+ .of_match_table = sdhci_pxav2_of_match,
+#endif
.pm = SDHCI_PLTFM_PMOPS,
},
.probe = sdhci_pxav2_probe,