imx: Use MXC_I2C_CLK in imx i2c driver

i2c didn't work on imx25 due to missing MXC_IPG_PERCLK. Now using
MXC_I2C_CLK on all imx systems using i2c.

Signed-off-by: Matthias Weisser <weisserm@arcor.de>
Acked-by: Stefano Babic <sbabic@denx.de>

arch/arm/cpu/arm1136/mx31/generic.c

@@ -104,6 +104,7 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 	case MXC_CSPI_CLK:
 	case MXC_UART_CLK:
 	case MXC_ESDHC_CLK:
+	case MXC_I2C_CLK:
 		return mx31_get_ipg_clk();
 	case MXC_IPU_CLK:
 		return mx31_get_hsp_clk();

arch/arm/cpu/arm1136/mx35/generic.c

@@ -357,6 +357,7 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 	case MXC_IPG_CLK:
 		return get_ipg_clk();
 	case MXC_IPG_PERCLK:
+	case MXC_I2C_CLK:
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return imx_get_uartclk();

arch/arm/cpu/armv7/mx5/clock.c

@@ -482,6 +482,7 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 	case MXC_IPG_CLK:
 		return get_ipg_clk();
 	case MXC_IPG_PERCLK:
+	case MXC_I2C_CLK:
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return get_uart_clk();

arch/arm/cpu/armv7/mx6/clock.c

@@ -357,6 +357,7 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 	case MXC_IPG_CLK:
 		return get_ipg_clk();
 	case MXC_IPG_PERCLK:
+	case MXC_I2C_CLK:
 		return get_ipg_per_clk();
 	case MXC_UART_CLK:
 		return get_uart_clk();

arch/arm/include/asm/arch-mx31/clock.h

@@ -46,6 +46,7 @@ enum mxc_clock {
 	MXC_UART_CLK,
 	MXC_IPU_CLK,
 	MXC_ESDHC_CLK,
+	MXC_I2C_CLK,
 };
 
 unsigned int mxc_get_clock(enum mxc_clock clk);

arch/arm/include/asm/arch-mx35/clock.h

@@ -48,6 +48,7 @@ enum mxc_clock {
 	MXC_USB_CLK,
 	MXC_CSPI_CLK,
 	MXC_FEC_CLK,
+	MXC_I2C_CLK,
 };
 
 enum mxc_main_clock {

arch/arm/include/asm/arch-mx5/clock.h

@@ -36,6 +36,7 @@ enum mxc_clock {
 	MXC_DDR_CLK,
 	MXC_NFC_CLK,
 	MXC_PERIPH_CLK,
+	MXC_I2C_CLK,
 };
 
 u32 imx_get_uartclk(void);

arch/arm/include/asm/arch-mx6/clock.h

@@ -41,6 +41,7 @@ enum mxc_clock {
 	MXC_ESDHC4_CLK,
 	MXC_SATA_CLK,
 	MXC_NFC_CLK,
+	MXC_I2C_CLK,
 };
 
 u32 imx_get_uartclk(void);

drivers/i2c/mxc_i2c.c

@@ -98,7 +98,7 @@ static uint8_t i2c_imx_get_clk(unsigned int rate)
 #endif
 
 	/* Divider value calculation */
-	i2c_clk_rate = mxc_get_clock(MXC_IPG_PERCLK);
+	i2c_clk_rate = mxc_get_clock(MXC_I2C_CLK);
 	div = (i2c_clk_rate + rate - 1) / rate;
 	if (div < i2c_clk_div[0][0])
 		clk_div = 0;
@@ -142,7 +142,7 @@ unsigned int bus_i2c_get_bus_speed(void *base)
 	for (clk_div = 0; i2c_clk_div[clk_div][1] != clk_idx; clk_div++)
 		;
 
-	return mxc_get_clock(MXC_IPG_PERCLK) / i2c_clk_div[clk_div][0];
+	return mxc_get_clock(MXC_I2C_CLK) / i2c_clk_div[clk_div][0];
 }
 
 #define ST_BUS_IDLE (0 | (I2SR_IBB << 8))