CLK(NULL, "omap_96m_alwon_fck", &omap_96m_alwon_fck, CK_343X),
CLK(NULL, "omap_96m_fck", &omap_96m_fck, CK_343X),
CLK(NULL, "cm_96m_fck", &cm_96m_fck, CK_343X),
- CLK(NULL, "virt_omap_54m_fck", &virt_omap_54m_fck, CK_343X),
CLK(NULL, "omap_54m_fck", &omap_54m_fck, CK_343X),
CLK(NULL, "omap_48m_fck", &omap_48m_fck, CK_343X),
CLK(NULL, "omap_12m_fck", &omap_12m_fck, CK_343X),
CLK(NULL, "emu_per_alwon_ck", &emu_per_alwon_ck, CK_343X),
CLK(NULL, "dpll5_ck", &dpll5_ck, CK_3430ES2),
CLK(NULL, "dpll5_m2_ck", &dpll5_m2_ck, CK_3430ES2),
- CLK(NULL, "omap_120m_fck", &omap_120m_fck, CK_3430ES2),
CLK(NULL, "clkout2_src_ck", &clkout2_src_ck, CK_343X),
CLK(NULL, "sys_clkout2", &sys_clkout2, CK_343X),
CLK(NULL, "corex2_fck", &corex2_fck, CK_343X),
*
* Recalculate and propagate the DPLL rate.
*/
-static void omap3_dpll_recalc(struct clk *clk)
+static unsigned long omap3_dpll_recalc(struct clk *clk)
{
- clk->rate = omap2_get_dpll_rate(clk);
+ return omap2_get_dpll_rate(clk);
}
/* _omap3_dpll_write_clken - write clken_bits arg to a DPLL's enable bits */
unsigned long fint;
u16 f = 0;
- fint = clk->parent->rate / (n + 1);
+ fint = clk->dpll_data->clk_ref->rate / (n + 1);
pr_debug("clock: fint is %lu\n", fint);
}
/*
- * omap3_noncore_dpll_bypass - instruct a DPLL to bypass and wait for readiness
+ * _omap3_noncore_dpll_bypass - instruct a DPLL to bypass and wait for readiness
* @clk: pointer to a DPLL struct clk
*
* Instructs a non-CORE DPLL to enter low-power bypass mode. In
static int omap3_noncore_dpll_enable(struct clk *clk)
{
int r;
+ struct dpll_data *dd;
if (clk == &dpll3_ck)
return -EINVAL;
- if (clk->parent->rate == omap2_get_dpll_rate(clk))
+ dd = clk->dpll_data;
+ if (!dd)
+ return -EINVAL;
+
+ if (clk->rate == dd->clk_bypass->rate) {
+ WARN_ON(clk->parent != dd->clk_bypass);
r = _omap3_noncore_dpll_bypass(clk);
- else
+ } else {
+ WARN_ON(clk->parent != dd->clk_ref);
r = _omap3_noncore_dpll_lock(clk);
+ }
+ /* FIXME: this is dubious - if clk->rate has changed, what about propagating? */
+ if (!r)
+ clk->rate = omap2_get_dpll_rate(clk);
return r;
}
* @clk: struct clk * of DPLL to set
* @rate: rounded target rate
*
- * Program the DPLL with the rounded target rate. Returns -EINVAL upon
- * error, or 0 upon success.
+ * Set the DPLL CLKOUT to the target rate. If the DPLL can enter
+ * low-power bypass, and the target rate is the bypass source clock
+ * rate, then configure the DPLL for bypass. Otherwise, round the
+ * target rate if it hasn't been done already, then program and lock
+ * the DPLL. Returns -EINVAL upon error, or 0 upon success.
*/
static int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate)
{
+ struct clk *new_parent = NULL;
u16 freqsel;
struct dpll_data *dd;
+ int ret;
if (!clk || !rate)
return -EINVAL;
if (rate == omap2_get_dpll_rate(clk))
return 0;
- if (dd->last_rounded_rate != rate)
- omap2_dpll_round_rate(clk, rate);
+ /*
+ * Ensure both the bypass and ref clocks are enabled prior to
+ * doing anything; we need the bypass clock running to reprogram
+ * the DPLL.
+ */
+ omap2_clk_enable(dd->clk_bypass);
+ omap2_clk_enable(dd->clk_ref);
- if (dd->last_rounded_rate == 0)
- return -EINVAL;
+ if (dd->clk_bypass->rate == rate &&
+ (clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
+ pr_debug("clock: %s: set rate: entering bypass.\n", clk->name);
- freqsel = _omap3_dpll_compute_freqsel(clk, dd->last_rounded_n);
- if (!freqsel)
- WARN_ON(1);
+ ret = _omap3_noncore_dpll_bypass(clk);
+ if (!ret)
+ new_parent = dd->clk_bypass;
+ } else {
+ if (dd->last_rounded_rate != rate)
+ omap2_dpll_round_rate(clk, rate);
+
+ if (dd->last_rounded_rate == 0)
+ return -EINVAL;
- omap3_noncore_dpll_program(clk, dd->last_rounded_m, dd->last_rounded_n,
- freqsel);
+ freqsel = _omap3_dpll_compute_freqsel(clk, dd->last_rounded_n);
+ if (!freqsel)
+ WARN_ON(1);
- omap3_dpll_recalc(clk);
+ pr_debug("clock: %s: set rate: locking rate to %lu.\n",
+ clk->name, rate);
+
+ ret = omap3_noncore_dpll_program(clk, dd->last_rounded_m,
+ dd->last_rounded_n, freqsel);
+ if (!ret)
+ new_parent = dd->clk_ref;
+ }
+ if (!ret) {
+ /*
+ * Switch the parent clock in the heirarchy, and make sure
+ * that the new parent's usecount is correct. Note: we
+ * enable the new parent before disabling the old to avoid
+ * any unnecessary hardware disable->enable transitions.
+ */
+ if (clk->usecount) {
+ omap2_clk_enable(new_parent);
+ omap2_clk_disable(clk->parent);
+ }
+ clk_reparent(clk, new_parent);
+ clk->rate = rate;
+ }
+ omap2_clk_disable(dd->clk_ref);
+ omap2_clk_disable(dd->clk_bypass);
return 0;
}
return omap3_noncore_dpll_set_rate(clk, rate);
}
+
+/*
+ * CORE DPLL (DPLL3) rate programming functions
+ *
+ * These call into SRAM code to do the actual CM writes, since the SDRAM
+ * is clocked from DPLL3.
+ */
+
+/**
+ * omap3_core_dpll_m2_set_rate - set CORE DPLL M2 divider
+ * @clk: struct clk * of DPLL to set
+ * @rate: rounded target rate
+ *
+ * Program the DPLL M2 divider with the rounded target rate. Returns
+ * -EINVAL upon error, or 0 upon success.
+ */
+static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
+{
+ u32 new_div = 0;
+ unsigned long validrate, sdrcrate;
+ struct omap_sdrc_params *sp;
+
+ if (!clk || !rate)
+ return -EINVAL;
+
+ if (clk != &dpll3_m2_ck)
+ return -EINVAL;
+
+ if (rate == clk->rate)
+ return 0;
+
+ validrate = omap2_clksel_round_rate_div(clk, rate, &new_div);
+ if (validrate != rate)
+ return -EINVAL;
+
+ sdrcrate = sdrc_ick.rate;
+ if (rate > clk->rate)
+ sdrcrate <<= ((rate / clk->rate) - 1);
+ else
+ sdrcrate >>= ((clk->rate / rate) - 1);
+
+ sp = omap2_sdrc_get_params(sdrcrate);
+ if (!sp)
+ return -EINVAL;
+
+ pr_info("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate,
+ validrate);
+ pr_info("clock: SDRC timing params used: %08x %08x %08x\n",
+ sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb);
+
+ /* REVISIT: SRAM code doesn't support other M2 divisors yet */
+ WARN_ON(new_div != 1 && new_div != 2);
+
+ /* REVISIT: Add SDRC_MR changing to this code also */
+ omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla,
+ sp->actim_ctrlb, new_div);
+
+ return 0;
+}
+
+
static const struct clkops clkops_noncore_dpll_ops = {
.enable = &omap3_noncore_dpll_enable,
.disable = &omap3_noncore_dpll_disable,
* Using parent clock DPLL data, look up DPLL state. If locked, set our
* rate to the dpll_clk * 2; otherwise, just use dpll_clk.
*/
-static void omap3_clkoutx2_recalc(struct clk *clk)
+static unsigned long omap3_clkoutx2_recalc(struct clk *clk)
{
const struct dpll_data *dd;
+ unsigned long rate;
u32 v;
struct clk *pclk;
dd = pclk->dpll_data;
- WARN_ON(!dd->control_reg || !dd->enable_mask);
+ WARN_ON(!dd->enable_mask);
v = __raw_readl(dd->control_reg) & dd->enable_mask;
v >>= __ffs(dd->enable_mask);
- if (v != DPLL_LOCKED)
- clk->rate = clk->parent->rate;
+ if (v != OMAP3XXX_EN_DPLL_LOCKED)
+ rate = clk->parent->rate;
else
- clk->rate = clk->parent->rate * 2;
+ rate = clk->parent->rate * 2;
+ return rate;
}
/* Common clock code */
/* REVISIT: not yet ready for 343x */
#if 0
- if (omap2_select_table_rate(&virt_prcm_set, mpurate))
+ if (clk_set_rate(&virt_prcm_set, mpurate))
printk(KERN_ERR "Could not find matching MPU rate\n");
#endif
clk_init(&omap2_clk_functions);
+ for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
+ clk_init_one(c->lk.clk);
+
for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
if (c->cpu & cpu_clkflg) {
clkdev_add(&c->lk);
git.openpandora.org / pandora-kernel.git / blobdiff