summaryrefslogtreecommitdiffstats
path: root/drivers/spi/spi-orion.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-14 04:15:11 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-14 04:15:11 +0100
commitd3b43e12b2c8c69f79ab76dcdc5956f47c376378 (patch)
tree4fba9e425d7407e5abd5ab50d5ac09398ec5bff6 /drivers/spi/spi-orion.c
parentMerge branch 'autofs' (patches from Ian Kent) (diff)
parentspi/sparc: Allow of_register_spi_devices for sparc (diff)
downloadlinux-d3b43e12b2c8c69f79ab76dcdc5956f47c376378.tar.xz
linux-d3b43e12b2c8c69f79ab76dcdc5956f47c376378.zip
Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull SPI updates from Grant Likely: "Primarily SPI device driver bug fixes, one removal of an old driver, and some new tegra support. There is some core code change too, but all in all pretty small stuff. The new features to note are: - Common code for describing GPIO CS lines in the device tree - Remove the SPI_BUFSIZ limitation on spi_write_the_read() - core spi ensures bits_per_word is set correctly - SPARC can now use SPI" * tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6: (36 commits) spi/sparc: Allow of_register_spi_devices for sparc spi: Remove HOTPLUG section attributes spi: Add support for specifying 3-wire mode via device tree spi: Fix comparison of different integer types spi/orion: Add SPI_CHPA and SPI_CPOL support to kirkwood driver. spi/sh: Add SH Mobile series as dependency to MSIOF controller spi/sh-msiof: Remove unneeded clock name spi: Remove SPI_BUFSIZ restriction on spi_write_then_read() spi/stmp: remove obsolete driver spi/clps711x: New SPI master driver spi: omap2-mcspi: remove duplicate inclusion of linux/err.h spi: omap2-mcspi: Fix the redifine warning spi/sh-hspi: add CS manual control support of_spi: add generic binding support to specify cs gpio spi: omap2-mcspi: remove duplicated include from spi-omap2-mcspi.c spi/bitbang: (cosmetic) simplify list manipulation spi/bitbang: avoid needless loop flow manipulations spi/omap: fix D0/D1 direction confusion spi: tegra: add spi driver for sflash controller spi: Dont call master->setup if not populated ...
Diffstat (limited to 'drivers/spi/spi-orion.c')
-rw-r--r--drivers/spi/spi-orion.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index b17c09cf0a05..b7e718254b1d 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -32,8 +32,12 @@
#define ORION_SPI_DATA_IN_REG 0x0c
#define ORION_SPI_INT_CAUSE_REG 0x10
+#define ORION_SPI_MODE_CPOL (1 << 11)
+#define ORION_SPI_MODE_CPHA (1 << 12)
#define ORION_SPI_IF_8_16_BIT_MODE (1 << 5)
#define ORION_SPI_CLK_PRESCALE_MASK 0x1F
+#define ORION_SPI_MODE_MASK (ORION_SPI_MODE_CPOL | \
+ ORION_SPI_MODE_CPHA)
struct orion_spi {
struct spi_master *master;
@@ -123,6 +127,23 @@ static int orion_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
return 0;
}
+static void
+orion_spi_mode_set(struct spi_device *spi)
+{
+ u32 reg;
+ struct orion_spi *orion_spi;
+
+ orion_spi = spi_master_get_devdata(spi->master);
+
+ reg = readl(spi_reg(orion_spi, ORION_SPI_IF_CONFIG_REG));
+ reg &= ~ORION_SPI_MODE_MASK;
+ if (spi->mode & SPI_CPOL)
+ reg |= ORION_SPI_MODE_CPOL;
+ if (spi->mode & SPI_CPHA)
+ reg |= ORION_SPI_MODE_CPHA;
+ writel(reg, spi_reg(orion_spi, ORION_SPI_IF_CONFIG_REG));
+}
+
/*
* called only when no transfer is active on the bus
*/
@@ -142,6 +163,8 @@ orion_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
if ((t != NULL) && t->bits_per_word)
bits_per_word = t->bits_per_word;
+ orion_spi_mode_set(spi);
+
rc = orion_spi_baudrate_set(spi, speed);
if (rc)
return rc;
@@ -399,7 +422,7 @@ static int __init orion_spi_probe(struct platform_device *pdev)
}
/* we support only mode 0, and no options */
- master->mode_bits = 0;
+ master->mode_bits = SPI_CPHA | SPI_CPOL;
master->setup = orion_spi_setup;
master->transfer_one_message = orion_spi_transfer_one_message;
@@ -478,7 +501,7 @@ static int __exit orion_spi_remove(struct platform_device *pdev)
MODULE_ALIAS("platform:" DRIVER_NAME);
-static const struct of_device_id orion_spi_of_match_table[] __devinitdata = {
+static const struct of_device_id orion_spi_of_match_table[] = {
{ .compatible = "marvell,orion-spi", },
{}
};