* Omap24xx specific clock functions
*-------------------------------------------------------------------------*/
-/* This actually returns the rate of core_ck, not dpll_ck. */
-static u32 omap2_get_dpll_rate_24xx(struct clk *tclk)
+/**
+ * omap2xxx_clk_get_core_rate - return the CORE_CLK rate
+ * @clk: pointer to the combined dpll_ck + core_ck (currently "dpll_ck")
+ *
+ * Returns the CORE_CLK rate. CORE_CLK can have one of three rate
+ * sources on OMAP2xxx: the DPLL CLKOUT rate, DPLL CLKOUTX2, or 32KHz
+ * (the latter is unusual). This currently should be called with
+ * struct clk *dpll_ck, which is a composite clock of dpll_ck and
+ * core_ck.
+ */
+static unsigned long omap2xxx_clk_get_core_rate(struct clk *clk)
{
- long long dpll_clk;
- u8 amult;
+ long long core_clk;
+ u32 v;
- dpll_clk = omap2_get_dpll_rate(tclk);
+ core_clk = omap2_get_dpll_rate(clk);
- amult = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
- amult &= OMAP24XX_CORE_CLK_SRC_MASK;
- dpll_clk *= amult;
+ v = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
+ v &= OMAP24XX_CORE_CLK_SRC_MASK;
+
+ if (v == CORE_CLK_SRC_32K)
+ core_clk = 32768;
+ else
+ core_clk *= v;
- return dpll_clk;
+ return core_clk;
}
static int omap2_enable_osc_ck(struct clk *clk)
}
-static void omap2_dpllcore_recalc(struct clk *clk)
+static unsigned long omap2_dpllcore_recalc(struct clk *clk)
{
- clk->rate = omap2_get_dpll_rate_24xx(clk);
+ return omap2xxx_clk_get_core_rate(clk);
}
static int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate)
struct prcm_config tmpset;
const struct dpll_data *dd;
- cur_rate = omap2_get_dpll_rate_24xx(&dpll_ck);
+ cur_rate = omap2xxx_clk_get_core_rate(&dpll_ck);
mult = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
mult &= OMAP24XX_CORE_CLK_SRC_MASK;
*
* Set virt_prcm_set's rate to the mpu_speed field of the current PRCM set.
*/
-static void omap2_table_mpu_recalc(struct clk *clk)
+static unsigned long omap2_table_mpu_recalc(struct clk *clk)
{
- clk->rate = curr_prcm_set->mpu_speed;
+ return curr_prcm_set->mpu_speed;
}
/*
}
curr_prcm_set = prcm;
- cur_rate = omap2_get_dpll_rate_24xx(&dpll_ck);
+ cur_rate = omap2xxx_clk_get_core_rate(&dpll_ck);
if (prcm->dpll_speed == cur_rate / 2) {
omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1);
return div;
}
-static void omap2_osc_clk_recalc(struct clk *clk)
+static unsigned long omap2_osc_clk_recalc(struct clk *clk)
{
- clk->rate = omap2_get_apll_clkin() * omap2_get_sysclkdiv();
+ return omap2_get_apll_clkin() * omap2_get_sysclkdiv();
}
-static void omap2_sys_clk_recalc(struct clk *clk)
+static unsigned long omap2_sys_clk_recalc(struct clk *clk)
{
- clk->rate = clk->parent->rate / omap2_get_sysclkdiv();
+ return clk->parent->rate / omap2_get_sysclkdiv();
}
/*
clk_init(&omap2_clk_functions);
- omap2_osc_clk_recalc(&osc_ck);
+ osc_ck.rate = omap2_osc_clk_recalc(&osc_ck);
propagate_rate(&osc_ck);
- omap2_sys_clk_recalc(&sys_ck);
+ sys_ck.rate = omap2_sys_clk_recalc(&sys_ck);
propagate_rate(&sys_ck);
for (c = omap24xx_clks; c < omap24xx_clks + ARRAY_SIZE(omap24xx_clks); c++)
}
/* Check the MPU rate set by bootloader */
- clkrate = omap2_get_dpll_rate_24xx(&dpll_ck);
+ clkrate = omap2xxx_clk_get_core_rate(&dpll_ck);
for (prcm = rate_table; prcm->mpu_speed; prcm++) {
if (!(prcm->flags & cpu_mask))
continue;