usb: chipidea: add ahb burst configuration interface
The users can change it through dts or platform data if they
want to change the default value.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 7a2c217..ce04897 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -438,6 +438,9 @@
hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16);
+ if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST)
+ hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK,
+ ci->platdata->ahb_burst_config);
}
/**
@@ -633,6 +636,17 @@
}
}
+ if (of_find_property(dev->of_node, "ahb-burst-config", NULL)) {
+ ret = of_property_read_u32(dev->of_node, "ahb-burst-config",
+ &platdata->ahb_burst_config);
+ if (ret) {
+ dev_err(dev,
+ "failed to get ahb-burst-config\n");
+ return ret;
+ }
+ platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST;
+ }
+
return 0;
}