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mmc: omap_hsmmc: correct max value of clkd 

clock divisor can take a max value of 1023.  Update code so that card
init can be handled at f_min even at higher IP clock frequencies from
which clock to the card is derived.

Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Balaji T K 2013-10-21 00:25:21 +05:30 committed by Chris Ball
parent 1e881786c9
commit ed16418215
1 changed files with 3 additions and 2 deletions
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5
drivers/mmc/host/omap_hsmmc.c
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@ -75,6 +75,7 @@
#define ICE 0x1 #define ICE 0x1
#define ICS 0x2 #define ICS 0x2
#define CEN (1 << 2) #define CEN (1 << 2)
#define CLKD_MAX 0x3FF /* max clock divisor: 1023 */
#define CLKD_MASK 0x0000FFC0 #define CLKD_MASK 0x0000FFC0
#define CLKD_SHIFT 6 #define CLKD_SHIFT 6
#define DTO_MASK 0x000F0000 #define DTO_MASK 0x000F0000
@ -497,8 +498,8 @@ static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios)
if (ios->clock) { if (ios->clock) {
dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock); dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock);
if (dsor > 250) if (dsor > CLKD_MAX)
dsor = 250; dsor = CLKD_MAX;
} }
return dsor; return dsor;