@@ -181,6 +181,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",
&data->dc_vol_level_adjust))
data->dc_vol_level_adjust = -1;
+ if (of_property_read_u32(np, "samsung,picophy-rise-fall-time-adjust",
+ &data->rise_fall_time_adjust))
+ data->rise_fall_time_adjust = -1;
return data;
}
@@ -28,6 +28,7 @@ struct imx_usbmisc_data {
enum usb_dr_mode available_role; /* runtime usb dr mode */
int emp_curr_control;
int dc_vol_level_adjust;
+ int rise_fall_time_adjust;
};
int imx_usbmisc_init(struct imx_usbmisc_data *data);
@@ -130,6 +130,8 @@
#define MX7D_USB_OTG_PHY_CFG1 0x30
#define TXPREEMPAMPTUNE0_BIT 28
#define TXPREEMPAMPTUNE0_MASK (3 << 28)
+#define TXRISETUNE0_BIT 24
+#define TXRISETUNE0_MASK (3 << 24)
#define TXVREFTUNE0_BIT 20
#define TXVREFTUNE0_MASK (0xf << 20)
@@ -673,6 +675,13 @@ static int usbmisc_imx7d_init(struct imx_usbmisc_data *data)
reg |= (data->dc_vol_level_adjust << TXVREFTUNE0_BIT);
}
+ if (data->rise_fall_time_adjust >= 0 &&
+ data->rise_fall_time_adjust <=
+ (TXRISETUNE0_MASK >> TXRISETUNE0_BIT)) {
+ reg &= ~TXRISETUNE0_MASK;
+ reg |= (data->rise_fall_time_adjust << TXRISETUNE0_BIT);
+ }
+
writel(reg, usbmisc->base + MX7D_USB_OTG_PHY_CFG1);
}
In some cases, the user may need to tune the rise/fall time of the high-speed transmitter waveform for USB Certification. This will add a parameter for this purpose. The value will be fetched from dtb and finally written to the register. Signed-off-by: Xu Yang <xu.yang_2@nxp.com> --- drivers/usb/chipidea/ci_hdrc_imx.c | 3 +++ drivers/usb/chipidea/ci_hdrc_imx.h | 1 + drivers/usb/chipidea/usbmisc_imx.c | 9 +++++++++ 3 files changed, 13 insertions(+)