usb: musb: core: fix order of arguments to ulpi write callback

commit 705e63d2b29c8bbf091119084544d353bda70393 upstream.

There is a bit of a mess in the order of arguments to the ulpi write
callback. There is

	int ulpi_write(struct ulpi *ulpi, u8 addr, u8 val)

in drivers/usb/common/ulpi.c;

	struct usb_phy_io_ops {
		...
		int (*write)(struct usb_phy *x, u32 val, u32 reg);
	}

in include/linux/usb/phy.h.

The callback registered by the musb driver has to comply to the latter,
but up to now had "offset" first which effectively made the function
broken for correct users. So flip the order and while at it also
switch to the parameter names of struct usb_phy_io_ops's write.

Fixes: ffb865b1e460 ("usb: musb: add ulpi access operations")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 6f7d84e..fb05cac 100644 (file)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -131,7 +131,7 @@ static inline struct musb *dev_to_musb(struct device *dev)
 /*-------------------------------------------------------------------------*/
 
 #ifndef CONFIG_BLACKFIN
-static int musb_ulpi_read(struct otg_transceiver *otg, u32 offset)
+static int musb_ulpi_read(struct otg_transceiver *otg, u32 reg)
 {
        void __iomem *addr = otg->io_priv;
        int     i = 0;
@@ -147,7 +147,7 @@ static int musb_ulpi_read(struct otg_transceiver *otg, u32 offset)
         * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM.
         */
 
-       musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
+       musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)reg);
        musb_writeb(addr, MUSB_ULPI_REG_CONTROL,
                        MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR);
 
@@ -165,8 +165,7 @@ static int musb_ulpi_read(struct otg_transceiver *otg, u32 offset)
        return musb_readb(addr, MUSB_ULPI_REG_DATA);
 }
 
-static int musb_ulpi_write(struct otg_transceiver *otg,
-               u32 offset, u32 data)
+static int musb_ulpi_write(struct otg_transceiver *otg, u32 val, u32 reg)
 {
        void __iomem *addr = otg->io_priv;
        int     i = 0;
@@ -178,8 +177,8 @@ static int musb_ulpi_write(struct otg_transceiver *otg,
        power &= ~MUSB_POWER_SUSPENDM;
        musb_writeb(addr, MUSB_POWER, power);
 
-       musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
-       musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data);
+       musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)reg);
+       musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)val);
        musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ);
 
        while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)