| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copyright 2009 Texas Instruments. |
| */ |
| |
| #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. |
| * @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 prescaler_limit; |
| 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 */ |