static int local_clk_enable(struct clk *clk)
{
int ret = 0;
if (clk->usecount == 0) {
if (clk->parent) {
ret = local_clk_enable(clk->parent);
if (ret != 0)
goto out;
}
if (clk->enable)
ret = clk->enable(clk);
else if (!(clk->flags & FIXED_RATE) && !clk->rate && clk->set_rate
&& clk->user_rate)
ret = clk->set_rate(clk, clk->user_rate);
if (ret != 0 && clk->parent) {
local_clk_disable(clk->parent);
goto out;
}
clk->usecount++;
}
out:
return ret;
}
int clk_enable(struct clk *clk)
{
int ret;
clock_lock();
ret = local_clk_enable(clk);
clock_unlock();
return ret;
}
static int __init clk_init(void)
{
struct clk **clkp;
/* Disable autoclocking, as it doesn't seem to work */
__raw_writel(0xff, AUTOCLK_CTRL);
for (clkp = onchip_clks; clkp < onchip_clks + ARRAY_SIZE(onchip_clks);
clkp++) {
struct clk *clk = *clkp;
if (clk->flags & NEEDS_INITIALIZATION) {
if (clk->set_rate) {
clk->user_rate = clk->rate;
local_set_rate(clk, clk->user_rate);
if (clk->set_parent)
clk->set_parent(clk, clk->parent);
}
if (clk->enable && clk->usecount)
clk->enable(clk);
if (clk->disable && !clk->usecount)
clk->disable(clk);
}
pr_debug("%s: clock %s, rate %ld\n",
__func__, clk->name, clk->rate);
}
local_clk_enable(&ck_pll4);
/* if ck_13MHz is not used, disable it. */
if (ck_13MHz.usecount == 0)
local_clk_disable(&ck_13MHz);
/* Disable autoclocking */
__raw_writeb(0xff, AUTOCLK_CTRL);
clkdev_add_table(onchip_clkreg, ARRAY_SIZE(onchip_clkreg));
return 0;
}
static int local_clk_use(struct clk *clk)
{
int ret = 0;
if (clk->usecount++ == 0) {
if (clk->parent)
ret = local_clk_use(clk->parent);
if (ret != 0) {
clk->usecount--;
goto out;
}
ret = local_clk_enable(clk);
if (ret != 0 && clk->parent) {
local_clk_unuse(clk->parent);
clk->usecount--;
}
}
out:
return ret;
}
