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Commit e6008857 authored by Noralf Trønnes's avatar Noralf Trønnes Committed by Greg Kroah-Hartman
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staging: fbtft: remove ARCH_BCM2708 optimization 



ARCH_BCM2708 is not present in mainline so remove optimization.

Signed-off-by: default avatarNoralf Trønnes <notro@tronnes.org>
Reported-by: default avatarPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 484c60e2

drivers/staging/fbtft/fbtft-io.c

+0 −170
Original line number Diff line number Diff line
@@ -2,9 +2,6 @@ 
#include <linux/errno.h>

#include <linux/gpio.h>

#include <linux/spi/spi.h>

#ifdef CONFIG_ARCH_BCM2708

#include <mach/platform.h>

#endif

#include "fbtft.h"



int fbtft_write_spi(struct fbtft_par *par, void *buf, size_t len)
@@ -129,171 +126,6 @@ int fbtft_read_spi(struct fbtft_par *par, void *buf, size_t len) 
}

EXPORT_SYMBOL(fbtft_read_spi);





#ifdef CONFIG_ARCH_BCM2708



/*

 *  Raspberry Pi

 *  -  writing directly to the registers is 40-50% faster than

 *     optimized use of gpiolib

 */



#define GPIOSET(no, ishigh)           \

do {                                  \

	if (ishigh)                   \

		set |= (1 << (no));   \

	else                          \

		reset |= (1 << (no)); \

} while (0)



int fbtft_write_gpio8_wr(struct fbtft_par *par, void *buf, size_t len)

{

	unsigned int set = 0;

	unsigned int reset = 0;

	u8 data;



	fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,

		"%s(len=%d): ", __func__, len);



	while (len--) {

		data = *(u8 *) buf;

		buf++;



		/* Set data */

		GPIOSET(par->gpio.db[0], (data&0x01));

		GPIOSET(par->gpio.db[1], (data&0x02));

		GPIOSET(par->gpio.db[2], (data&0x04));

		GPIOSET(par->gpio.db[3], (data&0x08));

		GPIOSET(par->gpio.db[4], (data&0x10));

		GPIOSET(par->gpio.db[5], (data&0x20));

		GPIOSET(par->gpio.db[6], (data&0x40));

		GPIOSET(par->gpio.db[7], (data&0x80));

		writel(set, __io_address(GPIO_BASE+0x1C));

		writel(reset, __io_address(GPIO_BASE+0x28));



		/* Pulse /WR low */

		writel((1<<par->gpio.wr),  __io_address(GPIO_BASE+0x28));

		writel(0,  __io_address(GPIO_BASE+0x28)); /* used as a delay */

		writel((1<<par->gpio.wr),  __io_address(GPIO_BASE+0x1C));



		set = 0;

		reset = 0;

	}



	return 0;

}

EXPORT_SYMBOL(fbtft_write_gpio8_wr);



int fbtft_write_gpio16_wr(struct fbtft_par *par, void *buf, size_t len)

{

	unsigned int set = 0;

	unsigned int reset = 0;

	u16 data;



	fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,

		"%s(len=%d): ", __func__, len);



	while (len) {

		len -= 2;

		data = *(u16 *) buf;

		buf += 2;



		/* Start writing by pulling down /WR */

		gpio_set_value(par->gpio.wr, 0);



		/* Set data */

		GPIOSET(par->gpio.db[0],  (data&0x0001));

		GPIOSET(par->gpio.db[1],  (data&0x0002));

		GPIOSET(par->gpio.db[2],  (data&0x0004));

		GPIOSET(par->gpio.db[3],  (data&0x0008));

		GPIOSET(par->gpio.db[4],  (data&0x0010));

		GPIOSET(par->gpio.db[5],  (data&0x0020));

		GPIOSET(par->gpio.db[6],  (data&0x0040));

		GPIOSET(par->gpio.db[7],  (data&0x0080));



		GPIOSET(par->gpio.db[8],  (data&0x0100));

		GPIOSET(par->gpio.db[9],  (data&0x0200));

		GPIOSET(par->gpio.db[10], (data&0x0400));

		GPIOSET(par->gpio.db[11], (data&0x0800));

		GPIOSET(par->gpio.db[12], (data&0x1000));

		GPIOSET(par->gpio.db[13], (data&0x2000));

		GPIOSET(par->gpio.db[14], (data&0x4000));

		GPIOSET(par->gpio.db[15], (data&0x8000));



		writel(set, __io_address(GPIO_BASE+0x1C));

		writel(reset, __io_address(GPIO_BASE+0x28));



		/* Pullup /WR */

		gpio_set_value(par->gpio.wr, 1);



		set = 0;

		reset = 0;

	}



	return 0;

}

EXPORT_SYMBOL(fbtft_write_gpio16_wr);



int fbtft_write_gpio16_wr_latched(struct fbtft_par *par, void *buf, size_t len)

{

	unsigned int set = 0;

	unsigned int reset = 0;

	u16 data;



	fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,

		"%s(len=%d): ", __func__, len);



	while (len) {

		len -= 2;

		data = *(u16 *) buf;

		buf += 2;



		/* Start writing by pulling down /WR */

		gpio_set_value(par->gpio.wr, 0);



		/* Low byte */

		GPIOSET(par->gpio.db[0],  (data&0x0001));

		GPIOSET(par->gpio.db[1],  (data&0x0002));

		GPIOSET(par->gpio.db[2],  (data&0x0004));

		GPIOSET(par->gpio.db[3],  (data&0x0008));

		GPIOSET(par->gpio.db[4],  (data&0x0010));

		GPIOSET(par->gpio.db[5],  (data&0x0020));

		GPIOSET(par->gpio.db[6],  (data&0x0040));

		GPIOSET(par->gpio.db[7],  (data&0x0080));

		writel(set, __io_address(GPIO_BASE+0x1C));

		writel(reset, __io_address(GPIO_BASE+0x28));



		/* Pulse 'latch' high */

		gpio_set_value(par->gpio.latch, 1);

		gpio_set_value(par->gpio.latch, 0);



		/* High byte */

		GPIOSET(par->gpio.db[0], (data&0x0100));

		GPIOSET(par->gpio.db[1], (data&0x0200));

		GPIOSET(par->gpio.db[2], (data&0x0400));

		GPIOSET(par->gpio.db[3], (data&0x0800));

		GPIOSET(par->gpio.db[4], (data&0x1000));

		GPIOSET(par->gpio.db[5], (data&0x2000));

		GPIOSET(par->gpio.db[6], (data&0x4000));

		GPIOSET(par->gpio.db[7], (data&0x8000));

		writel(set, __io_address(GPIO_BASE+0x1C));

		writel(reset, __io_address(GPIO_BASE+0x28));



		/* Pullup /WR */

		gpio_set_value(par->gpio.wr, 1);



		set = 0;

		reset = 0;

	}



	return 0;

}

EXPORT_SYMBOL(fbtft_write_gpio16_wr_latched);



#undef GPIOSET



#else



/*

 * Optimized use of gpiolib is twice as fast as no optimization

 * only one driver can use the optimized version at a time
@@ -405,5 +237,3 @@ int fbtft_write_gpio16_wr_latched(struct fbtft_par *par, void *buf, size_t len) 
	return -1;

}

EXPORT_SYMBOL(fbtft_write_gpio16_wr_latched);
 


#endif /* CONFIG_ARCH_BCM2708 */