From: Chao Xie <chao.xie@xxxxxxxxxxx>
In original driver, we have callbacks in platform data, and some
dynamically allocations variables in platform data.
Now, these blocks are removed, the device tree support is easier
now.
Signed-off-by: Chao Xie <xiechao.mail@xxxxxxxxx>
---
drivers/usb/gadget/mv_udc.h | 5 +-
drivers/usb/gadget/mv_udc_core.c | 105 ++++++++++++++++++++++++++++++--------
2 files changed, 85 insertions(+), 25 deletions(-)
diff --git a/drivers/usb/gadget/mv_udc.h b/drivers/usb/gadget/mv_udc.h
index 50ae7c7..de84722 100644
--- a/drivers/usb/gadget/mv_udc.h
+++ b/drivers/usb/gadget/mv_udc.h
@@ -179,6 +179,7 @@ struct mv_udc {
int irq;
unsigned int extern_attr;
+ unsigned int mode;
struct notifier_block notifier;
struct mv_cap_regs __iomem *cap_regs;
@@ -222,11 +223,9 @@ struct mv_udc {
struct mv_usb2_phy *phy;
struct usb_phy *transceiver;
- struct mv_usb_platform_data *pdata;
-
/* some SOC has mutiple clock sources for USB*/
unsigned int clknum;
- struct clk *clk[0];
+ struct clk **clk;
};
/* endpoint data structure */
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index 5571f42..2273a0c 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -34,6 +34,7 @@
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/of.h>
#include <linux/platform_data/mv_usb.h>
#include <linux/usb/mv_usb2.h>
#include <asm/unaligned.h>
@@ -2153,21 +2154,57 @@ static int __devexit mv_udc_remove(struct platform_device *pdev)
return 0;
}
+static int __devinit mv_udc_parse_dt(struct platform_device *pdev,
+ struct mv_udc *udc)
+{
+ struct device_node *np = pdev->dev.of_node;
+ unsigned int clks_num;
+ int i, ret;
+ const char *clk_name;
+
+ if (!np)
+ return 1;
+
+ clks_num = of_property_count_strings(np, "clocks");
+ if (clks_num < 0)
+ return clks_num;
+
+ udc->clk = devm_kzalloc(&pdev->dev,
+ sizeof(struct clk *) * clks_num, GFP_KERNEL);
+ if (udc->clk == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < clks_num; i++) {
+ ret = of_property_read_string_index(np, "clocks", i,
+ &clk_name);
+ if (ret)
+ return ret;
+ udc->clk[i] = devm_clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(udc->clk[i]))
+ return PTR_ERR(udc->clk[i]);
+ }
+
+ udc->clknum = clks_num;
+
+ ret = of_property_read_u32(np, "extern_attr", &udc->extern_attr);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32(np, "mode", &udc->mode);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
static int __devinit mv_udc_probe(struct platform_device *pdev)
{
- struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
struct mv_udc *udc;
int retval = 0;
- int clk_i = 0;
struct resource *r;
size_t size;
- if (pdata == NULL) {
- dev_err(&pdev->dev, "missing platform_data\n");
- return -ENODEV;
- }
-
- size = sizeof(*udc) + sizeof(struct clk *) * pdata->clknum;
+ size = sizeof(*udc);
udc = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (udc == NULL) {
dev_err(&pdev->dev, "failed to allocate memory for udc\n");
@@ -2175,14 +2212,43 @@ static int __devinit mv_udc_probe(struct platform_device *pdev)
}
udc->done = &release_done;
- udc->extern_attr = pdata->extern_attr;
- udc->pdata = pdev->dev.platform_data;
spin_lock_init(&udc->lock);
udc->dev = pdev;
+ retval = mv_udc_parse_dt(pdev, udc);
+ if (retval > 0) {
+ /* no CONFIG_OF */
+ struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
+ int clk_i = 0;
+
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "missing platform_data\n");
+ return -ENODEV;
+ }
+ udc->extern_attr = pdata->extern_attr;
+ udc->mode = pdata->mode;
+ udc->clknum = pdata->clknum;
+
+ size = sizeof(struct clk *) * udc->clknum;
+ udc->clk = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ if (udc->clk == NULL)
+ return -ENOMEM;
+ for (clk_i = 0; clk_i < udc->clknum; clk_i++) {
+ udc->clk[clk_i] = devm_clk_get(&pdev->dev,
+ pdata->clkname[clk_i]);
+ if (IS_ERR(udc->clk[clk_i])) {
+ retval = PTR_ERR(udc->clk[clk_i]);
+ return retval;
+ }
+ }
+ } else if (retval < 0) {
+ dev_err(&pdev->dev, "error parse dt\n");
+ return retval;
+ }
+
#ifdef CONFIG_USB_OTG_UTILS
- if (pdata->mode == MV_USB_MODE_OTG) {
+ if (udc->mode == MV_USB_MODE_OTG) {
udc->transceiver = devm_usb_get_phy(&pdev->dev,
USB_PHY_TYPE_USB2);
if (IS_ERR_OR_NULL(udc->transceiver)) {
@@ -2191,17 +2257,6 @@ static int __devinit mv_udc_probe(struct platform_device *pdev)
}
}
#endif
-
- udc->clknum = pdata->clknum;
- for (clk_i = 0; clk_i < udc->clknum; clk_i++) {
- udc->clk[clk_i] = devm_clk_get(&pdev->dev,
- pdata->clkname[clk_i]);
- if (IS_ERR(udc->clk[clk_i])) {
- retval = PTR_ERR(udc->clk[clk_i]);
- return retval;
- }
- }
-
r = platform_get_resource(udc->dev, IORESOURCE_MEM, 0);
if (r == NULL) {
dev_err(&pdev->dev, "no I/O memory resource defined\n");
@@ -2466,6 +2521,11 @@ static void mv_udc_shutdown(struct platform_device *pdev)
mv_udc_disable(udc);
}
+static struct of_device_id mv_udc_dt_ids[] = {
+ { .compatible = "mrvl,mv-udc" },
+};
+MODULE_DEVICE_TABLE(of, mv_udc_dt_ids);
+
static struct platform_driver udc_driver = {
.probe = mv_udc_probe,
.remove = __exit_p(mv_udc_remove),
@@ -2476,6 +2536,7 @@ static struct platform_driver udc_driver = {
#ifdef CONFIG_PM
.pm = &mv_udc_pm_ops,
#endif
+ .of_match_table = mv_udc_dt_ids,
},
};
--
1.7.4.1
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