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| author | Robert ABEL <rabel@cit-ec.uni-bielefeld.de> | 2015-02-27 16:56:52 +0100 |
|---|---|---|
| committer | Roger Quadros <rogerq@ti.com> | 2015-03-06 12:35:45 +0200 |
| commit | f585070b91950a0269eb20f497cceeee0aeefe0e (patch) | |
| tree | f22d10e02b3c01ce86d1ad8961d1bcf184a1760c /drivers | |
| parent | 563dbb260d74dbd49d66f9a07e0311563c62c8ff (diff) | |
| download | op-kernel-dev-f585070b91950a0269eb20f497cceeee0aeefe0e.zip op-kernel-dev-f585070b91950a0269eb20f497cceeee0aeefe0e.tar.gz | |
ARM OMAP2+ GPMC: always program GPMCFCLKDIVIDER
The WAITMONITORINGTIME is expressed as a number of GPMC_CLK clock cycles,
even though the access is defined as asynchronous, and no GPMC_CLK clock
is provided to the external device. Still, GPMCFCLKDIVIDER is used as a divider
for the GPMC clock, so it must be programmed to define the
correct WAITMONITORINGTIME delay.
Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/memory/omap-gpmc.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c index 6a35971..5c36ff3 100644 --- a/drivers/memory/omap-gpmc.c +++ b/drivers/memory/omap-gpmc.c @@ -508,7 +508,7 @@ static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, l = gpmc_cs_read_reg(cs, reg); #ifdef DEBUG - printk(KERN_INFO + pr_info( "GPMC CS%d: %-17s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n", cs, name, ticks, gpmc_get_fclk_period() * ticks / 1000, (l >> st_bit) & mask, time); @@ -580,19 +580,14 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t) if (gpmc_capability & GPMC_HAS_WR_ACCESS) GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access); - /* caller is expected to have initialized CONFIG1 to cover - * at least sync vs async - */ l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); - if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) { #ifdef DEBUG - printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n", - cs, (div * gpmc_get_fclk_period()) / 1000, div); + pr_info("GPMC CS%d CLK period is %lu ns (div %d)\n", + cs, (div * gpmc_get_fclk_period()) / 1000, div); #endif - l &= ~0x03; - l |= (div - 1); - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l); - } + l &= ~0x03; + l |= (div - 1); + gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l); gpmc_cs_bool_timings(cs, &t->bool_timings); gpmc_cs_show_timings(cs, "after gpmc_cs_set_timings"); |
