mx25: Define more standard clocks

Define AHB, IPG and CSPI clocks.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/cpu/arm926ejs/mx25/generic.c

@@ -101,6 +101,11 @@ ulong imx_get_ahbclk(void)
 	return fref / div;
 }
 
+static ulong imx_get_ipgclk(void)
+{
+	return imx_get_ahbclk() / 2;
+}
+
 ulong imx_get_perclk(int clk)
 {
 	struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
@@ -120,6 +125,11 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
 	switch (clk) {
 	case MXC_ARM_CLK:
 		return imx_get_armclk();
+	case MXC_AHB_CLK:
+		return imx_get_ahbclk();
+	case MXC_IPG_CLK:
+	case MXC_CSPI_CLK:
+		return imx_get_ipgclk();
 	case MXC_FEC_CLK:
 		return imx_get_ahbclk();
 	default:

arch/arm/include/asm/arch-mx25/clock.h

@@ -41,6 +41,7 @@
 #endif
 
 enum mxc_clock {
+	/* PER clocks (do not change order) */
 	MXC_CSI_CLK,
 	MXC_EPIT_CLK,
 	MXC_ESAI_CLK,
@@ -57,7 +58,11 @@ enum mxc_clock {
 	MXC_SSI1_CLK,
 	MXC_SSI2_CLK,
 	MXC_UART_CLK,
+	/* Other clocks */
 	MXC_ARM_CLK,
+	MXC_AHB_CLK,
+	MXC_IPG_CLK,
+	MXC_CSPI_CLK,
 	MXC_FEC_CLK,
 	MXC_CLK_NUM
 };