blackfin: add spi and i2c specific get clock functions

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>

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);

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

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;

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)

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;