diff options
Diffstat (limited to 'kernel/include/linux/platform_data/spi-davinci.h')
| -rw-r--r-- | kernel/include/linux/platform_data/spi-davinci.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/kernel/include/linux/platform_data/spi-davinci.h b/kernel/include/linux/platform_data/spi-davinci.h new file mode 100644 index 000000000..8dc2fa47a --- /dev/null +++ b/kernel/include/linux/platform_data/spi-davinci.h @@ -0,0 +1,89 @@ +/* + * Copyright 2009 Texas Instruments. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __ARCH_ARM_DAVINCI_SPI_H +#define __ARCH_ARM_DAVINCI_SPI_H + +#include <linux/platform_data/edma.h> + +#define SPI_INTERN_CS 0xFF + +enum { + SPI_VERSION_1, /* For DM355/DM365/DM6467 */ + SPI_VERSION_2, /* For DA8xx */ +}; + +/** + * davinci_spi_platform_data - Platform data for SPI master device on DaVinci + * + * @version: version of the SPI IP. Different DaVinci devices have slightly + * varying versions of the same IP. + * @num_chipselect: number of chipselects supported by this SPI master + * @intr_line: interrupt line used to connect the SPI IP to the ARM interrupt + * controller withn the SoC. Possible values are 0 and 1. + * @chip_sel: list of GPIOs which can act as chip-selects for the SPI. + * SPI_INTERN_CS denotes internal SPI chip-select. Not necessary + * to populate if all chip-selects are internal. + * @cshold_bug: set this to true if the SPI controller on your chip requires + * a write to CSHOLD bit in between transfers (like in DM355). + * @dma_event_q: DMA event queue to use if SPI_IO_TYPE_DMA is used for any + * device on the bus. + */ +struct davinci_spi_platform_data { + u8 version; + u8 num_chipselect; + u8 intr_line; + u8 *chip_sel; + bool cshold_bug; + enum dma_event_q dma_event_q; +}; + +/** + * davinci_spi_config - Per-chip-select configuration for SPI slave devices + * + * @wdelay: amount of delay between transmissions. Measured in number of + * SPI module clocks. + * @odd_parity: polarity of parity flag at the end of transmit data stream. + * 0 - odd parity, 1 - even parity. + * @parity_enable: enable transmission of parity at end of each transmit + * data stream. + * @io_type: type of IO transfer. Choose between polled, interrupt and DMA. + * @timer_disable: disable chip-select timers (setup and hold) + * @c2tdelay: chip-select setup time. Measured in number of SPI module clocks. + * @t2cdelay: chip-select hold time. Measured in number of SPI module clocks. + * @t2edelay: transmit data finished to SPI ENAn pin inactive time. Measured + * in number of SPI clocks. + * @c2edelay: chip-select active to SPI ENAn signal active time. Measured in + * number of SPI clocks. + */ +struct davinci_spi_config { + u8 wdelay; + u8 odd_parity; + u8 parity_enable; +#define SPI_IO_TYPE_INTR 0 +#define SPI_IO_TYPE_POLL 1 +#define SPI_IO_TYPE_DMA 2 + u8 io_type; + u8 timer_disable; + u8 c2tdelay; + u8 t2cdelay; + u8 t2edelay; + u8 c2edelay; +}; + +#endif /* __ARCH_ARM_DAVINCI_SPI_H */ |