/* include/linux/platform_data/spi-rockchip.h
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*
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* Copyright (C) 2014 Rockchip Electronics Ltd.
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* luowei <lw@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ROCKCHIP_PLAT_SPI_H
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#define __ROCKCHIP_PLAT_SPI_H
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#include <linux/dmaengine.h>
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struct platform_device;
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/**
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* struct rockchip_spi_csinfo - ChipSelect description
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* @fb_delay: Slave specific feedback delay.
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* Refer to FB_CLK_SEL register definition in SPI chapter.
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* @line: Custom 'identity' of the CS line.
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*
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* This is per SPI-Slave Chipselect information.
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* Allocate and initialize one in machine init code and make the
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* spi_board_info.controller_data point to it.
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*/
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struct rockchip_spi_csinfo {
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u8 fb_delay;
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unsigned line;
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};
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/**
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* struct rockchip_spi_info - SPI Controller defining structure
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* @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field.
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* @num_cs: Number of CS this controller emulates.
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* @cfg_gpio: Configure pins for this SPI controller.
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*/
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struct rockchip_spi_info {
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int src_clk_nr;
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int spi_freq;
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int num_cs;
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int bus_num;
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int (*cfg_gpio)(void);
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dma_filter_fn filter;
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u8 transfer_mode;/*full or half duplex*/
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u8 poll_mode; /* 0 for contoller polling mode */
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u8 type; /* SPI/SSP/Micrwire */
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u8 enable_dma;
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u8 slave_enable;
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};
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/**
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* rockchip_spi_set_platdata - SPI Controller configure callback by the board
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* initialization code.
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* @cfg_gpio: Pointer to gpio setup function.
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* @src_clk_nr: Clock the SPI controller is to use to generate SPI clocks.
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* @num_cs: Number of elements in the 'cs' array.
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*
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* Call this from machine init code for each SPI Controller that
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* has some chips attached to it.
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*/
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extern void rockchip_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
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int num_cs);
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extern void rockchip_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
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int num_cs);
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extern void rockchip_spi2_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
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int num_cs);
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/* defined by architecture to configure gpio */
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extern int rockchip_spi0_cfg_gpio(void);
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extern int rockchip_spi1_cfg_gpio(void);
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extern int rockchip_spi2_cfg_gpio(void);
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extern struct rockchip_spi_info rockchip_spi0_pdata;
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extern struct rockchip_spi_info rockchip_spi1_pdata;
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extern struct rockchip_spi_info rockchip_spi2_pdata;
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#endif /* __ROCKCHIP_PLAT_SPI_H */
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