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ARM: OMAP2+: smc91x: generic timing calculation 

Generic gpmc timing calculation helper is available now, use
it instead of custom timing calculation.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
This commit is contained in:
Afzal Mohammed 2012-08-17 11:29:14 +05:30
parent 4f4426f900
commit ac2d9ae194
1 changed files with 17 additions and 26 deletions
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43
arch/arm/mach-omap2/gpmc-smc91x.c
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@ -58,6 +58,7 @@ static struct platform_device gpmc_smc91x_device = {
static int smc91c96_gpmc_retime(void)
{
struct gpmc_timings t;
struct gpmc_device_timings dev_t;
const int t3 = 10; /* Figure 12.2 read and 12.4 write */
const int t4_r = 20; /* Figure 12.2 read */
const int t4_w = 5; /* Figure 12.4 write */
@ -68,32 +69,6 @@ static int smc91c96_gpmc_retime(void)
const int t20 = 185; /* Figure 12.2 read and 12.4 write */
u32 l;
memset(&t, 0, sizeof(t));
/* Read timings */
t.cs_on = 0;
t.adv_on = t.cs_on;
t.oe_on = t.adv_on + t3;
t.access = t.oe_on + t5;
t.oe_off = t.access;
t.adv_rd_off = t.oe_off + max(t4_r, t6);
t.cs_rd_off = t.oe_off;
t.rd_cycle = t20 - t.oe_on;
/* Write timings */
t.we_on = t.adv_on + t3;
if (cpu_is_omap34xx() && (gpmc_cfg->flags & GPMC_MUX_ADD_DATA)) {
t.wr_data_mux_bus = t.we_on;
t.we_off = t.wr_data_mux_bus + t7;
} else
t.we_off = t.we_on + t7;
if (cpu_is_omap34xx())
t.wr_access = t.we_off;
t.adv_wr_off = t.we_off + max(t4_w, t8);
t.cs_wr_off = t.we_off + t4_w;
t.wr_cycle = t20 - t.we_on;
l = GPMC_CONFIG1_DEVICESIZE_16;
if (gpmc_cfg->flags & GPMC_MUX_ADD_DATA)
l |= GPMC_CONFIG1_MUXADDDATA;
@ -115,6 +90,22 @@ static int smc91c96_gpmc_retime(void)
if (gpmc_cfg->flags & GPMC_MUX_ADD_DATA)
return 0;
memset(&dev_t, 0, sizeof(dev_t));
dev_t.t_oeasu = t3 * 1000;
dev_t.t_oe = t5 * 1000;
dev_t.t_cez_r = t4_r * 1000;
dev_t.t_oez = t6 * 1000;
dev_t.t_rd_cycle = (t20 - t3) * 1000;
dev_t.t_weasu = t3 * 1000;
dev_t.t_wpl = t7 * 1000;
dev_t.t_wph = t8 * 1000;
dev_t.t_cez_w = t4_w * 1000;
dev_t.t_wr_cycle = (t20 - t3) * 1000;
gpmc_calc_timings(&t, &dev_t);
return gpmc_cs_set_timings(gpmc_cfg->cs, &t);
}