android_kernel_xiaomi_sm8350/include/asm-arm/arch-pxa/pxa2xx_spi.h
eric miao 2f1a74e5a2 [ARM] pxa: make pxa2xx_spi driver use ssp_request()/ssp_free()
1. make pxa2xx_spi.c use ssp_request() and ssp_free() to get the common
   information of the designated SSP port.

2. remove those IRQ/memory request code, ssp_request() has done that for
   the driver

3. the SPI platform device is thus made psuedo, no resource (memory/IRQ)
   has to be defined, all will be retreived by ssp_request()

4. introduce ssp_get_clk_div() to handle controller difference in clock
   divisor setting

5. use clk_xxx() API for clock enable/disable, and clk_get_rate() to
   handle the different SSP clock frequency between different processors

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-26 15:07:52 +00:00

45 lines
1.3 KiB
C

/*
* Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
*
* 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 PXA2XX_SPI_H_
#define PXA2XX_SPI_H_
#define PXA2XX_CS_ASSERT (0x01)
#define PXA2XX_CS_DEASSERT (0x02)
/* device.platform_data for SSP controller devices */
struct pxa2xx_spi_master {
u32 clock_enable;
u16 num_chipselect;
u8 enable_dma;
};
/* spi_board_info.controller_data for SPI slave devices,
* copied to spi_device.platform_data ... mostly for dma tuning
*/
struct pxa2xx_spi_chip {
u8 tx_threshold;
u8 rx_threshold;
u8 dma_burst_size;
u32 timeout;
u8 enable_loopback;
void (*cs_control)(u32 command);
};
#endif /*PXA2XX_SPI_H_*/