/**
* omap2_clksel_speculate() - recalc rate from speculative parent clock rate
* @clk: struct clk * for the clock whose rate we are recalculating
* @parent_rate: speculative parent clock rate
*
* This function takes a speculative or ficticious parent clock rate and
* recalculates the rate for the clock in question based off of it. Useful
* for clock rate change pre-notifiers where we don't want to actually change
* the clksel, or even the 'rate' field of a clk struct.
*/
unsigned long omap2_clksel_speculate(struct clk *clk, unsigned long parent_rate)
{
unsigned long rate;
u32 div = 0;
/* check for fixed divisor */
if (clk->fixed_div)
return parent_rate / clk->fixed_div;
/* does clock follow parent rate? */
if (!clk->clksel)
return parent_rate;
/* clock must use clksel */
div = _read_divisor(clk);
if (div == 0)
return clk->rate;
rate = parent_rate / div;
pr_debug("clock: %s: recalc'd rate is %ld (div %d)\n", clk->name,
rate, div);
return rate;
}
unsigned long omap2_clksel_recalc(struct clk *clk)
{
unsigned long rate;
u32 div = 0;
div = _read_divisor(clk);
if (div == 0)
return clk->rate;
rate = clk->parent->rate / div;
pr_debug("clock: %s: recalc'd rate is %ld (div %d)\n", clk->name,
rate, div);
return rate;
}
/**
* omap2_clksel_recalc() - function ptr to pass via struct clk .recalc field
* @clk: struct clk *
*
* This function is intended to be called only by the clock framework.
* Each clksel clock should have its struct clk .recalc field set to this
* function. Returns the clock's current rate, based on its parent's rate
* and its current divisor setting in the hardware.
*/
unsigned long omap2_clksel_recalc(struct clk *clk)
{
unsigned long rate;
u32 div = 0, mul = 0;
div = _read_divisor(clk, &mul);
if (div == 0)
return clk->rate;
rate = _calculate_rate(clk->parent->rate, div, mul);
pr_debug("clock: %s: recalc'd rate is %ld (div %d) (mul %d)\n",
clk->name, rate, div, mul);
return rate;
}
/**
* omap2_clksel_recalc() - function ptr to pass via struct clk .recalc field
* @clk: struct clk *
*
* This function is intended to be called only by the clock framework.
* Each clksel clock should have its struct clk .recalc field set to this
* function. Returns the clock's current rate, based on its parent's rate
* and its current divisor setting in the hardware.
*/
unsigned long omap2_clksel_recalc(struct clk *clk)
{
unsigned long rate;
u32 div = 0;
struct clk *parent;
div = _read_divisor(clk);
if (div == 0)
return __clk_get_rate(clk);
parent = __clk_get_parent(clk);
rate = __clk_get_rate(parent) / div;
pr_debug("clock: %s: recalc'd rate is %ld (div %d)\n",
__clk_get_name(clk), rate, div);
return rate;
}