* Standard clock functions defined in include/linux/clk.h
*-------------------------------------------------------------------------*/
+/*
+ * All the code inside #ifndef CONFIG_COMMON_CLKDEV can be removed once all
+ * MXC architectures have switched to using clkdev.
+ */
+#ifndef CONFIG_COMMON_CLKDEV
/*
* Retrieve a clock by name.
*
return clk;
}
EXPORT_SYMBOL(clk_get);
+#endif
static void __clk_disable(struct clk *clk)
{
}
EXPORT_SYMBOL(clk_get_rate);
+#ifndef CONFIG_COMMON_CLKDEV
/* Decrement the clock's module reference count */
void clk_put(struct clk *clk)
{
module_put(clk->owner);
}
EXPORT_SYMBOL(clk_put);
+#endif
/* Round the requested clock rate to the nearest supported
* rate that is less than or equal to the requested rate.
}
EXPORT_SYMBOL(clk_get_parent);
+#ifndef CONFIG_COMMON_CLKDEV
/*
* Add a new clock to the clock tree.
*/
}
late_initcall(mxc_setup_proc_entry);
+#endif /* CONFIG_PROC_FS */
+#endif
+
+/*
+ * Get the resulting clock rate from a PLL register value and the input
+ * frequency. PLLs with this register layout can at least be found on
+ * MX1, MX21, MX27 and MX31
+ *
+ * mfi + mfn / (mfd + 1)
+ * f = 2 * f_ref * --------------------
+ * pd + 1
+ */
+unsigned long mxc_decode_pll(unsigned int reg_val, u32 freq)
+{
+ long long ll;
+ int mfn_abs;
+ unsigned int mfi, mfn, mfd, pd;
+
+ mfi = (reg_val >> 10) & 0xf;
+ mfn = reg_val & 0x3ff;
+ mfd = (reg_val >> 16) & 0x3ff;
+ pd = (reg_val >> 26) & 0xf;
+
+ mfi = mfi <= 5 ? 5 : mfi;
+
+ mfn_abs = mfn;
+
+#if !defined CONFIG_ARCH_MX1 && !defined CONFIG_ARCH_MX21
+ if (mfn >= 0x200) {
+ mfn |= 0xFFFFFE00;
+ mfn_abs = -mfn;
+ }
#endif
+
+ freq *= 2;
+ freq /= pd + 1;
+
+ ll = (unsigned long long)freq * mfn_abs;
+
+ do_div(ll, mfd + 1);
+ if (mfn < 0)
+ ll = -ll;
+ ll = (freq * mfi) + ll;
+
+ return ll;
+}