mmc: access mxcmmc from mx31 boards

This patch modifies mxcmmc.c to be used
not only by i.MX27 but also by i.MX31 boards.
Both use the same SD controller, but have different
clock set-ups.
The i.MX27 imx_get_XXXclock functions are made static to
generic.c and a public mxc_get_clock() function
is provided.  Pins, base address and prototypes for
an i.MX31 specific board_init_mmc() are provided.
Some of the i.MX27 clock getters are unused and marked
as such to avoid warnings (./MAKEALL -s mx27), but
the code was left in for future use.

Signed-off-by: Helmut Raiger <helmut.raiger@hale.at>
Acked-by: Stefano Babic <sbabic@denx.de>

1 files changed, 26 insertions, 9 deletions

diff --git a/arch/arm/cpu/arm926ejs/mx27/generic.c b/arch/arm/cpu/arm926ejs/mx27/generic.c
index 34c20e1bae..65c4813784 100644
--- a/arch/arm/cpu/arm926ejs/mx27/generic.c
+++ b/arch/arm/cpu/arm926ejs/mx27/generic.c
@@ -23,6 +23,7 @@
 #include <netdev.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
 #ifdef CONFIG_MXC_MMC
 #include <asm/arch/mxcmmc.h>
 #endif
@@ -34,7 +35,7 @@
  *  f = 2 * f_ref * --------------------
  *                        pd + 1
  */
-unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref)
+static unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref)
 {
 	unsigned int mfi = (pll >> 10) & 0xf;
 	unsigned int mfn = pll & 0x3ff;
@@ -64,7 +65,7 @@ static ulong clk_in_26m(void)
 	}
 }
 
-ulong imx_get_mpllclk(void)
+static ulong imx_get_mpllclk(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 	ulong cscr = readl(&pll->cscr);
@@ -78,7 +79,7 @@ ulong imx_get_mpllclk(void)
 	return imx_decode_pll(readl(&pll->mpctl0), fref);
 }
 
-ulong imx_get_armclk(void)
+static ulong imx_get_armclk(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 	ulong cscr = readl(&pll->cscr);
@@ -93,7 +94,7 @@ ulong imx_get_armclk(void)
 	return lldiv(fref, div);
 }
 
-ulong imx_get_ahbclk(void)
+static ulong imx_get_ahbclk(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 	ulong cscr = readl(&pll->cscr);
@@ -105,7 +106,7 @@ ulong imx_get_ahbclk(void)
 	return lldiv(fref * 2, 3 * div);
 }
 
-ulong imx_get_spllclk(void)
+static __attribute__((unused)) ulong imx_get_spllclk(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 	ulong cscr = readl(&pll->cscr);
@@ -124,34 +125,50 @@ static ulong imx_decode_perclk(ulong div)
 	return lldiv((imx_get_mpllclk() * 2), (div * 3));
 }
 
-ulong imx_get_perclk1(void)
+static ulong imx_get_perclk1(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 
 	return imx_decode_perclk((readl(&pll->pcdr1) & 0x3f) + 1);
 }
 
-ulong imx_get_perclk2(void)
+static ulong imx_get_perclk2(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 
 	return imx_decode_perclk(((readl(&pll->pcdr1) >> 8) & 0x3f) + 1);
 }
 
-ulong imx_get_perclk3(void)
+static __attribute__((unused)) ulong imx_get_perclk3(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 
 	return imx_decode_perclk(((readl(&pll->pcdr1) >> 16) & 0x3f) + 1);
 }
 
-ulong imx_get_perclk4(void)
+static __attribute__((unused)) ulong imx_get_perclk4(void)
 {
 	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
 
 	return imx_decode_perclk(((readl(&pll->pcdr1) >> 24) & 0x3f) + 1);
 }
 
+unsigned int mxc_get_clock(enum mxc_clock clk)
+{
+	switch (clk) {
+	case MXC_ARM_CLK:
+		return imx_get_armclk();
+	case MXC_UART_CLK:
+		return imx_get_perclk1();
+	case MXC_FEC_CLK:
+		return imx_get_ahbclk();
+	case MXC_ESDHC_CLK:
+		return imx_get_perclk2();
+	}
+	return -1;
+}
+
+
 #if defined(CONFIG_DISPLAY_CPUINFO)
 int print_cpuinfo (void)
 {