[PATCH 4.14 115/157] mfd: intel-lpss: Program REMAP register in PIO mode

From: Greg Kroah-Hartman
Date: Sun Jul 01 2018 - 13:38:00 EST

4.14-stable review patch. If anyone has any objections, please let me know.


From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

commit d28b62520830b2d0bffa2d98e81afc9f5e537e8b upstream.

According to documentation REMAP register has to be programmed in
either DMA or PIO mode of the slice.

Move the DMA capability check below to let REMAP register be programmed
in PIO mode.

Cc: stable@xxxxxxxxxxxxxxx # 4.3+
Fixes: 4b45efe85263 ("mfd: Add support for Intel Sunrisepoint LPSS devices")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/mfd/intel-lpss.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/mfd/intel-lpss.c
+++ b/drivers/mfd/intel-lpss.c
@@ -275,11 +275,11 @@ static void intel_lpss_init_dev(const st


+ intel_lpss_set_remap_addr(lpss);
if (!intel_lpss_has_idma(lpss))

- intel_lpss_set_remap_addr(lpss);
/* Make sure that SPI multiblock DMA transfers are re-enabled */
if (lpss->type == LPSS_DEV_SPI)
writel(value, lpss->priv + LPSS_PRIV_SSP_REG);