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| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2013-03-30 12:54:01 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-30 08:13:58 -0700 |
| commit | a068533079a0a1be53c78c89e65adfbd3c687591 (patch) | |
| tree | be75fdae9ac283f5cf3f5ab7310ba0298578b3e5 /drivers/usb/chipidea/usbmisc_imx.c | |
| parent | f0c910b63cc273c239964776fae1aaa58ed4ad2b (diff) | |
| download | linux-stable-a068533079a0a1be53c78c89e65adfbd3c687591.tar.gz linux-stable-a068533079a0a1be53c78c89e65adfbd3c687591.tar.bz2 linux-stable-a068533079a0a1be53c78c89e65adfbd3c687591.zip | |
usb: chipidea: usbmisc: add post handling and errata fix for mx25
This adds a post handling routine which is called after
ci13xxx_add_device was called. The first user is the mx25, which has to
disable the external-vbus-divider after the udc has started.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
[Alex: also fixed a signed one-bit bitfield a whitespace error and yet
another set of line-too-long and void pointer casting errors]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea/usbmisc_imx.c')
| -rw-r--r-- | drivers/usb/chipidea/usbmisc_imx.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c index 746013d7d391..714a6bd810ed 100644 --- a/drivers/usb/chipidea/usbmisc_imx.c +++ b/drivers/usb/chipidea/usbmisc_imx.c @@ -14,11 +14,15 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> +#include <linux/delay.h> #include "ci13xxx_imx.h" #define USB_DEV_MAX 4 +#define MX25_USB_PHY_CTRL_OFFSET 0x08 +#define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23) + #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08 #define MX53_USB_UH2_CTRL_OFFSET 0x14 #define MX53_USB_UH3_CTRL_OFFSET 0x18 @@ -59,6 +63,30 @@ static struct usbmisc_usb_device *get_usbdev(struct device *dev) return &usbmisc->usbdev[i]; } +static int usbmisc_imx25_post(struct device *dev) +{ + struct usbmisc_usb_device *usbdev; + void __iomem *reg; + unsigned long flags; + u32 val; + + usbdev = get_usbdev(dev); + if (IS_ERR(usbdev)) + return PTR_ERR(usbdev); + + reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET; + + if (usbdev->evdo) { + spin_lock_irqsave(&usbmisc->lock, flags); + val = readl(reg); + writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg); + spin_unlock_irqrestore(&usbmisc->lock, flags); + usleep_range(5000, 10000); /* needed to stabilize voltage */ + } + + return 0; +} + static int usbmisc_imx53_init(struct device *dev) { struct usbmisc_usb_device *usbdev; @@ -120,6 +148,10 @@ static int usbmisc_imx6q_init(struct device *dev) return 0; } +static const struct usbmisc_ops imx25_usbmisc_ops = { + .post = usbmisc_imx25_post, +}; + static const struct usbmisc_ops imx53_usbmisc_ops = { .init = usbmisc_imx53_init, }; @@ -130,6 +162,10 @@ static const struct usbmisc_ops imx6q_usbmisc_ops = { static const struct of_device_id usbmisc_imx_dt_ids[] = { { + .compatible = "fsl,imx25-usbmisc", + .data = &imx25_usbmisc_ops, + }, + { .compatible = "fsl,imx53-usbmisc", .data = &imx53_usbmisc_ops, }, |