Merge branch 'nfs-for-2.6.35' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6

[pandora-kernel.git] / arch / arm / mach-ep93xx / clock.c

diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
index 1d0f9d8..e29bdef 100644 (file)
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -10,6 +10,8 @@
  * your option) any later version.
  */
 
+#define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/clk.h>
 #include <linux/err.h>
@@ -94,6 +96,10 @@ static struct clk clk_keypad = {
        .enable_mask    = EP93XX_SYSCON_KEYTCHCLKDIV_KEN,
        .set_rate       = set_keytchclk_rate,
 };
+static struct clk clk_spi = {
+       .parent         = &clk_xtali,
+       .rate           = EP93XX_EXT_CLK_RATE,
+};
 static struct clk clk_pwm = {
        .parent         = &clk_xtali,
        .rate           = EP93XX_EXT_CLK_RATE,
@@ -184,6 +190,7 @@ static struct clk_lookup clocks[] = {
        INIT_CK("ep93xx-ohci",          NULL,           &clk_usb_host),
        INIT_CK("ep93xx-keypad",        NULL,           &clk_keypad),
        INIT_CK("ep93xx-fb",            NULL,           &clk_video),
+       INIT_CK("ep93xx-spi.0",         NULL,           &clk_spi),
        INIT_CK(NULL,                   "pwm_clk",      &clk_pwm),
        INIT_CK(NULL,                   "m2p0",         &clk_m2p0),
        INIT_CK(NULL,                   "m2p1",         &clk_m2p1),
@@ -445,37 +452,47 @@ static void __init ep93xx_dma_clock_init(void)
 static int __init ep93xx_clock_init(void)
 {
        u32 value;
-       int i;
 
-       value = __raw_readl(EP93XX_SYSCON_CLOCK_SET1);
-       if (!(value & 0x00800000)) {                    /* PLL1 bypassed?  */
+       /* Determine the bootloader configured pll1 rate */
+       value = __raw_readl(EP93XX_SYSCON_CLKSET1);
+       if (!(value & EP93XX_SYSCON_CLKSET1_NBYP1))
                clk_pll1.rate = clk_xtali.rate;
-       } else {
+       else
                clk_pll1.rate = calc_pll_rate(value);
-       }
+
+       /* Initialize the pll1 derived clocks */
        clk_f.rate = clk_pll1.rate / fclk_divisors[(value >> 25) & 0x7];
        clk_h.rate = clk_pll1.rate / hclk_divisors[(value >> 20) & 0x7];
        clk_p.rate = clk_h.rate / pclk_divisors[(value >> 18) & 0x3];
        ep93xx_dma_clock_init();
 
-       value = __raw_readl(EP93XX_SYSCON_CLOCK_SET2);
-       if (!(value & 0x00080000)) {                    /* PLL2 bypassed?  */
+       /* Determine the bootloader configured pll2 rate */
+       value = __raw_readl(EP93XX_SYSCON_CLKSET2);
+       if (!(value & EP93XX_SYSCON_CLKSET2_NBYP2))
                clk_pll2.rate = clk_xtali.rate;
-       } else if (value & 0x00040000) {                /* PLL2 enabled?  */
+       else if (value & EP93XX_SYSCON_CLKSET2_PLL2_EN)
                clk_pll2.rate = calc_pll_rate(value);
-       } else {
+       else
                clk_pll2.rate = 0;
-       }
+
+       /* Initialize the pll2 derived clocks */
        clk_usb_host.rate = clk_pll2.rate / (((value >> 28) & 0xf) + 1);
 
-       printk(KERN_INFO "ep93xx: PLL1 running at %ld MHz, PLL2 at %ld MHz\n",
+       /*
+        * EP93xx SSP clock rate was doubled in version E2. For more information
+        * see:
+        *     http://www.cirrus.com/en/pubs/appNote/AN273REV4.pdf
+        */
+       if (ep93xx_chip_revision() < EP93XX_CHIP_REV_E2)
+               clk_spi.rate /= 2;
+
+       pr_info("PLL1 running at %ld MHz, PLL2 at %ld MHz\n",
                clk_pll1.rate / 1000000, clk_pll2.rate / 1000000);
-       printk(KERN_INFO "ep93xx: FCLK %ld MHz, HCLK %ld MHz, PCLK %ld MHz\n",
+       pr_info("FCLK %ld MHz, HCLK %ld MHz, PCLK %ld MHz\n",
                clk_f.rate / 1000000, clk_h.rate / 1000000,
                clk_p.rate / 1000000);
 
-       for (i = 0; i < ARRAY_SIZE(clocks); i++)
-               clkdev_add(&clocks[i]);
+       clkdev_add_table(clocks, ARRAY_SIZE(clocks));
        return 0;
 }
 arch_initcall(ep93xx_clock_init);