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| author | Alexander Kurz <akurz@blala.de> | 2016-07-27 16:42:04 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-08-03 07:30:41 +0200 |
| commit | 28a0baffb9e70ed6abf5f1123278f7dfed2ed481 (patch) | |
| tree | 11874c9b5201a4c5fcd34e4ae71483a333c159d1 /include | |
| parent | 0c619050256735ebe48f1376e320b26b716d64a3 (diff) | |
| download | barebox-28a0baffb9e70ed6abf5f1123278f7dfed2ed481.tar.gz barebox-28a0baffb9e70ed6abf5f1123278f7dfed2ed481.tar.xz | |
ARM i.MX31: add SPI support
The i.MX31 SPI interface was refered by freescale as spi_ver_0_4 in one
of their older vendor extended linux releases. spi_ver_0_4 differs only
in minor aspects to spi_ver_0_7 (i.MX35) which is already supported by
barebox.
Regarding barebox, the differences boil down to the location and length
of the CHIP SELECT and BIT COUNT/BURST LENGTH elements of CONREG. The
spi_ver_0_4 variant is limited to single word bursts with a maximum of
32 bits_per_word.
Add support for the i.MX31 SPI interface to the barebox spi_ver_0_7
implementation.
Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/spi/imx-spi.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/spi/imx-spi.h b/include/spi/imx-spi.h index 221c66502f..a592573e62 100644 --- a/include/spi/imx-spi.h +++ b/include/spi/imx-spi.h @@ -40,6 +40,12 @@ #define CSPI_0_0_RESET_START (1 << 0) +#define CSPI_0_4_CTRL 0x08 +#define CSPI_0_4_CTRL_BL_SHIFT 8 +#define CSPI_0_4_CTRL_BL_MASK 0x1f +#define CSPI_0_4_CTRL_DRCTL_SHIFT 20 +#define CSPI_0_4_CTRL_CS_SHIFT 24 + #define CSPI_0_7_RXDATA 0x00 #define CSPI_0_7_TXDATA 0x04 #define CSPI_0_7_CTRL 0x08 @@ -50,6 +56,7 @@ #define CSPI_0_7_CTRL_PHA (1 << 5) #define CSPI_0_7_CTRL_SSCTL (1 << 6) #define CSPI_0_7_CTRL_SSPOL (1 << 7) +#define CSPI_0_7_CTRL_DRCTL_SHIFT 8 #define CSPI_0_7_CTRL_CS_SHIFT 12 #define CSPI_0_7_CTRL_DR_SHIFT 16 #define CSPI_0_7_CTRL_BL_SHIFT 20 |