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authorSonic Zhang <sonic.zhang@analog.com>2014-01-28 13:53:34 +0800
committerHeiko Schocher <hs@denx.de>2014-02-20 06:46:56 +0100
commitd6a320d5bb3050eeb9a586481145d3a75ef24db8 (patch)
tree89c94515625e3e071bf2be44fb32db285cd289a6
parentbb0fad0ea095944c76dc94fcd13b91699413f79f (diff)
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blackfin: add spi and i2c specific get clock functions
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
-rw-r--r--arch/blackfin/include/asm/blackfin_local.h7
-rw-r--r--arch/blackfin/include/asm/clock.h11
-rw-r--r--drivers/i2c/bfin-twi_i2c.c3
-rw-r--r--drivers/spi/bfin_spi.c7
-rw-r--r--drivers/spi/bfin_spi6xx.c7
5 files changed, 21 insertions, 14 deletions
diff --git a/arch/blackfin/include/asm/blackfin_local.h b/arch/blackfin/include/asm/blackfin_local.h
index 4d6eeab..868c82e 100644
--- a/arch/blackfin/include/asm/blackfin_local.h
+++ b/arch/blackfin/include/asm/blackfin_local.h
@@ -42,13 +42,6 @@
# include <linux/types.h>
-extern u_long get_vco(void);
-extern u_long get_cclk(void);
-extern u_long get_sclk(void);
-extern u_long get_sclk0(void);
-extern u_long get_sclk1(void);
-extern u_long get_dclk(void);
-
# define bfin_revid() (bfin_read_CHIPID() >> 28)
extern int bfin_os_log_check(void);
diff --git a/arch/blackfin/include/asm/clock.h b/arch/blackfin/include/asm/clock.h
index fc84fe4..59d3faa 100644
--- a/arch/blackfin/include/asm/clock.h
+++ b/arch/blackfin/include/asm/clock.h
@@ -68,10 +68,21 @@ static inline uint32_t early_get_uart_clk(void)
return uclk;
}
+extern u_long get_vco(void);
+extern u_long get_cclk(void);
+extern u_long get_sclk(void);
+
#ifdef CGU_DIV
+extern u_long get_sclk0(void);
+extern u_long get_sclk1(void);
+extern u_long get_dclk(void);
# define get_uart_clk get_sclk0
+# define get_i2c_clk get_sclk0
+# define get_spi_clk get_sclk0
#else
# define get_uart_clk get_sclk
+# define get_i2c_clk get_sclk
+# define get_spi_clk get_sclk
#endif
#endif
diff --git a/drivers/i2c/bfin-twi_i2c.c b/drivers/i2c/bfin-twi_i2c.c
index 5c37280..cfab064 100644
--- a/drivers/i2c/bfin-twi_i2c.c
+++ b/drivers/i2c/bfin-twi_i2c.c
@@ -10,6 +10,7 @@
#include <i2c.h>
#include <asm/blackfin.h>
+#include <asm/clock.h>
#include <asm/mach-common/bits/twi.h>
/* Every register is 32bit aligned, but only 16bits in size */
@@ -274,7 +275,7 @@ unsigned int i2c_get_bus_speed(void)
*/
void i2c_init(int speed, int slaveaddr)
{
- uint8_t prescale = ((get_sclk() / 1000 / 1000 + 5) / 10) & 0x7F;
+ uint8_t prescale = ((get_i2c_clk() / 1000 / 1000 + 5) / 10) & 0x7F;
/* Set TWI internal clock as 10MHz */
twi->control = prescale;
diff --git a/drivers/spi/bfin_spi.c b/drivers/spi/bfin_spi.c
index aa89d89..71a31d0 100644
--- a/drivers/spi/bfin_spi.c
+++ b/drivers/spi/bfin_spi.c
@@ -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)
diff --git a/drivers/spi/bfin_spi6xx.c b/drivers/spi/bfin_spi6xx.c
index 07b833d..eba01d1 100644
--- a/drivers/spi/bfin_spi6xx.c
+++ b/drivers/spi/bfin_spi6xx.c
@@ -22,6 +22,7 @@
#include <spi.h>
#include <asm/blackfin.h>
+#include <asm/clock.h>
#include <asm/gpio.h>
#include <asm/portmux.h>
#include <asm/mach-common/bits/spi6xx.h>
@@ -135,11 +136,11 @@ 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 clock;
- sclk = get_sclk1();
- clock = sclk / hz;
+ clk = get_spi_clk();
+ clock = clk / hz;
if (clock)
clock--;
bss->clock = clock;