hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ARM OMAP2+ GPMC: change get_gpmc_timing_reg output for DTS 

DTS output was formatted to require additional work when copy-pasting into DTS.
Nano-second timings were replaced with interval of values that produce the same
number of clock ticks.

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>
This commit is contained in:
Robert ABEL 2015-02-27 16:56:51 +01:00 committed by Roger Quadros
parent 2affc816df
commit 563dbb260d
1 changed files with 28 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/memory/omap-gpmc.c
View File

@ -346,32 +346,50 @@ static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p)
}
#ifdef DEBUG
/**
* get_gpmc_timing_reg - read a timing parameter and print DTS settings for it.
* @cs: Chip Select Region
* @reg: GPMC_CS_CONFIGn register offset.
* @st_bit: Start Bit
* @end_bit: End Bit. Must be >= @st_bit.
* @name: DTS node name, w/o "gpmc,"
* @raw: Raw Format Option.
* raw format: gpmc,name = <value>
* tick format: gpmc,name = <value> /&zwj;* x ns -- y ns; x ticks *&zwj;/
* Where x ns -- y ns result in the same tick value.
* @noval: Parameter values equal to 0 are not printed.
* @shift: Parameter value left shifts @shift, which is then printed instead of value.
* @return: Specified timing parameter (after optional @shift).
*
*/
static int get_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
bool raw, bool noval, int shift,
const char *name)
{
u32 l;
int nr_bits, max_value, mask;
int nr_bits;
int mask;
l = gpmc_cs_read_reg(cs, reg);
nr_bits = end_bit - st_bit + 1;
max_value = (1 << nr_bits) - 1;
mask = max_value << st_bit;
l = (l & mask) >> st_bit;
mask = (1 << nr_bits) - 1;
l = (l >> st_bit) & mask;
if (shift)
l = (shift << l);
if (noval && (l == 0))
return 0;
if (!raw) {
unsigned int time_ns_min, time_ns, time_ns_max;
/* DTS tick format for timings in ns */
unsigned int time_ns;
unsigned int time_ns_min = 0;
time_ns_min = gpmc_ticks_to_ns(l ? l - 1 : 0);
if (l)
time_ns_min = gpmc_ticks_to_ns(l - 1) + 1;
time_ns = gpmc_ticks_to_ns(l);
time_ns_max = gpmc_ticks_to_ns(l + 1 > max_value ?
max_value : l + 1);
pr_info("gpmc,%s = <%u> (%u - %u ns, %i ticks)\n",
name, time_ns, time_ns_min, time_ns_max, l);
pr_info("gpmc,%s = <%u> /* %u ns - %u ns; %i ticks */\n",
name, time_ns, time_ns_min, time_ns, l);
} else {
/* raw format */
pr_info("gpmc,%s = <%u>\n", name, l);
}