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blackfin: add spi and i2c specific get clock functions

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Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
This commit is contained in:
Sonic Zhang
2014-01-28 13:53:34 +08:00
committed by Heiko Schocher
parent bb0fad0ea0
commit d6a320d5bb
5 changed files with 21 additions and 14 deletions
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7
drivers/spi/bfin_spi.c
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@@ -13,6 +13,7 @@
#include <spi.h>
#include <asm/blackfin.h>
#include <asm/clock.h>
#include <asm/gpio.h>
#include <asm/portmux.h>
#include <asm/mach-common/bits/spi.h>
@@ -140,12 +141,12 @@ static const unsigned short cs_pins[][7] = {
void spi_set_speed(struct spi_slave *slave, uint hz)
{
struct bfin_spi_slave *bss = to_bfin_spi_slave(slave);
ulong sclk;
ulong clk;
u32 baud;
sclk = get_sclk();
clk = get_spi_clk();
/* baud should be rounded up */
baud = DIV_ROUND_UP(sclk, 2 * hz);
baud = DIV_ROUND_UP(clk, 2 * hz);
if (baud < 2)
baud = 2;
else if (baud > (u16)-1)