/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright ( C ) 2009 Samsung Electronics Ltd .
* Jaswinder Singh < jassi . brar @ samsung . com >
*/
#ifndef __SPI_S3C64XX_H
#define __SPI_S3C64XX_H
#include <linux/dmaengine.h>
struct platform_device;
/**
* struct s3c64xx_spi_csinfo - ChipSelect description
* @ fb_delay : Slave specific feedback delay .
* Refer to FB_CLK_SEL register definition in SPI chapter .
*
* This is per SPI - Slave Chipselect information .
* Allocate and initialize one in machine init code and make the
* spi_board_info . controller_data point to it .
*/
struct s3c64xx_spi_csinfo {
u8 fb_delay;
};
/**
* struct s3c64xx_spi_info - SPI Controller defining structure
* @ src_clk_nr : Clock source index for the CLK_CFG [ SPI_CLKSEL ] field .
* @ num_cs : Number of CS this controller emulates .
* @ no_cs : Used when CS line is not connected .
* @ cfg_gpio : Configure pins for this SPI controller .
*/
struct s3c64xx_spi_info {
int src_clk_nr;
int num_cs;
bool no_cs;
bool polling;
int (*cfg_gpio)(void );
};
/**
* s3c64xx_spi_set_platdata - SPI Controller configure callback by the board
* initialization code .
* @ src_clk_nr : Clock the SPI controller is to use to generate SPI clocks .
* @ num_cs : Number of elements in the ' cs ' array .
*
* Call this from machine init code for each SPI Controller that
* has some chips attached to it .
*/
extern void s3c64xx_spi0_set_platdata(int src_clk_nr, int num_cs);
/* defined by architecture to configure gpio */
extern int s3c64xx_spi0_cfg_gpio(void );
extern struct s3c64xx_spi_info s3c64xx_spi0_pdata;
#endif /*__SPI_S3C64XX_H */
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