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[AVR32] SMC configuration in clock cycles

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This patch makes the SMC configuration take timings in clock cycles
instead of nanoseconds. A function to calculate timings in clock
cycles is added.

This patch removes the rounding troubles of the previous SMC
configuration method.

[hskinnemoen@atmel.com: fix atstk1002/atngw100 flash config]
Signed-off-by: Kristoffer Nyborg Gregertsen <gregerts@stud.ntnu.no>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Kristoffer Nyborg Gregertsen
2007-08-17 16:59:57 +02:00
committed by Haavard Skinnemoen
parent 193fdd1a99
commit af8184718a
4 changed files with 163 additions and 31 deletions
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5
arch/avr32/boards/atstk1000/flash.c
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@ -15,7 +15,7 @@
#include <asm/arch/smc.h>
static struct smc_config flash_config __initdata = {
static struct smc_timing flash_timing __initdata = {
.ncs_read_setup = 0,
.nrd_setup = 40,
.ncs_write_setup = 0,
@ -28,7 +28,9 @@ static struct smc_config flash_config __initdata = {
.read_cycle = 120,
.write_cycle = 120,
};
static struct smc_config flash_config __initdata = {
.bus_width = 2,
.nrd_controlled = 1,
.nwe_controlled = 1,
@ -82,6 +84,7 @@ static int __init atstk1000_flash_init(void)
{
int ret;
smc_set_timing(&flash_config, &flash_timing);
ret = smc_set_configuration(0, &flash_config);
if (ret < 0) {
printk(KERN_ERR "atstk1000: failed to set NOR flash timing\n");