From 4277163c2a451fd8db0883cde5e55cf61a70fe85 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Thu, 17 Mar 2011 21:42:29 +0000 Subject: [PATCH] mfd: Push byte swap out of WM8994 bulk I/O For bulk I/O it is both convenient and more sensible to pre-swap the data rather than doing the swap as part of the I/O operation so move the byte swaps we're currently doing into the core write function into the register based functions, giving the bulk write function a straight pass through to the chip. This leaves reads inconsistent, this will be addressed as a followup patch. Signed-off-by: Mark Brown Signed-off-by: Samuel Ortiz --- drivers/mfd/wm8994-core.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index ce93796e7f57..475bd50d5528 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -107,9 +107,7 @@ static int wm8994_write(struct wm8994 *wm8994, unsigned short reg, for (i = 0; i < bytes / 2; i++) { dev_vdbg(wm8994->dev, "Write %04x to R%d(0x%x)\n", - buf[i], reg + i, reg + i); - - buf[i] = cpu_to_be16(buf[i]); + be16_to_cpu(buf[i]), reg + i, reg + i); } return wm8994->write_dev(wm8994, reg, bytes, src); @@ -127,6 +125,8 @@ int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, { int ret; + val = cpu_to_be16(val); + mutex_lock(&wm8994->io_lock); ret = wm8994_write(wm8994, reg, 2, &val); @@ -143,7 +143,7 @@ EXPORT_SYMBOL_GPL(wm8994_reg_write); * @wm8994: Device to write to * @reg: First register * @count: Number of registers - * @buf: Buffer to write from. + * @buf: Buffer to write from. Data must be big-endian formatted. */ int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg, int count, u16 *buf) @@ -183,6 +183,8 @@ int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, r &= ~mask; r |= val; + r = cpu_to_be16(r); + ret = wm8994_write(wm8994, reg, 2, &r); out: