From: Anton Vorontsov <avorontsov-hkdhdckH98+B+jHODAdFcQ@public.gmane.org>
To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org
Subject: [PATCH 3/3] [POWERPC][SPI] spi_mpc83xx: add support for loopback mode
Date: Thu, 26 Jul 2007 17:51:06 +0400 [thread overview]
Message-ID: <20070726135106.GC5550@localhost.localdomain> (raw)
In-Reply-To: <20070726134754.GA3539-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
Signed-off-by: Anton Vorontsov <avorontsov-hkdhdckH98+B+jHODAdFcQ@public.gmane.org>
---
drivers/spi/spi_mpc83xx.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index 458075a..e9582d3 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -39,6 +39,7 @@ struct mpc83xx_spi_reg {
};
/* SPI Controller mode register definitions */
+#define SPMODE_LOOP (1 << 30)
#define SPMODE_CI_INACTIVEHIGH (1 << 29)
#define SPMODE_CP_BEGIN_EDGECLK (1 << 28)
#define SPMODE_DIV16 (1 << 27)
@@ -155,7 +156,7 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value)
/* mask out bits we are going to set */
regval &= ~(SPMODE_CP_BEGIN_EDGECLK | SPMODE_CI_INACTIVEHIGH |
SPMODE_LEN(0xF) | SPMODE_DIV16 | SPMODE_PM(0xF) | \
- SPMODE_REV);
+ SPMODE_REV | SPMODE_LOOP);
if (spi->mode & SPI_CPHA)
regval |= SPMODE_CP_BEGIN_EDGECLK;
@@ -163,6 +164,8 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value)
regval |= SPMODE_CI_INACTIVEHIGH;
if (!(spi->mode & SPI_LSB_FIRST))
regval |= SPMODE_REV;
+ if (spi->mode & SPI_LOOP)
+ regval |= SPMODE_LOOP;
regval |= SPMODE_LEN(len);
@@ -273,7 +276,8 @@ int mpc83xx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
}
/* the spi->mode bits understood by this driver: */
-#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST)
+#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST | \
+ SPI_LOOP)
static int mpc83xx_spi_setup(struct spi_device *spi)
{
--
1.5.0.6
-------------------------------------------------------------------------
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prev parent reply other threads:[~2007-07-26 13:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-26 13:47 [PATCH 0/3] [SPI] loopback mode support, [POWERPC] loopback mode for spi_mpc83xx Anton Vorontsov
[not found] ` <20070726134754.GA3539-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-07-26 13:50 ` [PATCH 1/3] [SPI] Sync spidev.{h, c} with spi.h Anton Vorontsov
[not found] ` <20070726135041.GA5550-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-07-27 3:02 ` David Brownell
2007-07-26 13:50 ` [PATCH 2/3] [SPI] Add new mode: SPI_LOOP Anton Vorontsov
[not found] ` <20070726135051.GB5550-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-07-27 3:07 ` David Brownell
[not found] ` <200707262007.07537.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-07-27 3:34 ` Ned Forrester
[not found] ` <46A967D5.30606-/d+BM93fTQY@public.gmane.org>
2007-08-01 18:25 ` David Brownell
2007-07-27 13:27 ` Anton Vorontsov
2007-07-26 13:51 ` Anton Vorontsov [this message]
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