static int sh_tmu_enable(struct sh_tmu_channel *ch)
{
if (ch->enable_count++ > 0)
return 0;
pm_runtime_get_sync(&ch->tmu->pdev->dev);
dev_pm_syscore_device(&ch->tmu->pdev->dev, true);
return __sh_tmu_enable(ch);
}
static int sh_tmu_enable(struct sh_tmu_priv *p)
{
if (p->enable_count++ > 0)
return 0;
pm_runtime_get_sync(&p->pdev->dev);
dev_pm_syscore_device(&p->pdev->dev, true);
return __sh_tmu_enable(p);
}
static void sh_tmu_disable(struct sh_tmu_channel *ch)
{
if (WARN_ON(ch->enable_count == 0))
return;
if (--ch->enable_count > 0)
return;
__sh_tmu_disable(ch);
dev_pm_syscore_device(&ch->tmu->pdev->dev, false);
pm_runtime_put(&ch->tmu->pdev->dev);
}
static void sh_tmu_disable(struct sh_tmu_priv *p)
{
if (WARN_ON(p->enable_count == 0))
return;
if (--p->enable_count > 0)
return;
__sh_tmu_disable(p);
dev_pm_syscore_device(&p->pdev->dev, false);
pm_runtime_put(&p->pdev->dev);
}
static void sh_cmt_disable(struct sh_cmt_priv *p)
{
/* disable channel */
sh_cmt_start_stop_ch(p, 0);
/* disable interrupts in CMT block */
sh_cmt_write_cmcsr(p, 0);
/* stop clock */
clk_disable(p->clk);
dev_pm_syscore_device(&p->pdev->dev, false);
pm_runtime_put(&p->pdev->dev);
}
static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
{
int k, ret;
pm_runtime_get_sync(&p->pdev->dev);
dev_pm_syscore_device(&p->pdev->dev, true);
/* enable clock */
ret = clk_enable(p->clk);
if (ret) {
dev_err(&p->pdev->dev, "cannot enable clock\n");
goto err0;
}
/* make sure channel is disabled */
sh_cmt_start_stop_ch(p, 0);
/* configure channel, periodic mode and maximum timeout */
if (p->width == 16) {
*rate = clk_get_rate(p->clk) / 512;
sh_cmt_write_cmcsr(p, 0x43);
} else {
*rate = clk_get_rate(p->clk) / 8;
sh_cmt_write_cmcsr(p, 0x01a4);
}
sh_cmt_write_cmcor(p, 0xffffffff);
sh_cmt_write_cmcnt(p, 0);
/*
* According to the sh73a0 user's manual, as CMCNT can be operated
* only by the RCLK (Pseudo 32 KHz), there's one restriction on
* modifying CMCNT register; two RCLK cycles are necessary before
* this register is either read or any modification of the value
* it holds is reflected in the LSI's actual operation.
*
* While at it, we're supposed to clear out the CMCNT as of this
* moment, so make sure it's processed properly here. This will
* take RCLKx2 at maximum.
*/
for (k = 0; k < 100; k++) {
if (!sh_cmt_read_cmcnt(p))
break;
udelay(1);
}
if (sh_cmt_read_cmcnt(p)) {
dev_err(&p->pdev->dev, "cannot clear CMCNT\n");
ret = -ETIMEDOUT;
goto err1;
}
/* enable channel */
sh_cmt_start_stop_ch(p, 1);
return 0;
err1:
/* stop clock */
clk_disable(p->clk);
err0:
return ret;
}
