C++ (Cpp) clk_is_using_xtalの例

コード例 #1

ファイル: clock.c プロジェクト: CSCLOG/beaglebone

static void __clk_enable(struct clk *clk)
{
	if (!clk)
		return;

	/* enable parent clock first */
	if (clk->parent)
		__clk_enable(clk->parent);

	if (clk->use_cnt++ == 0) {
		if (clk_is_pll1(clk)) {	/* PLL1 */
			chipcHw_pll1Enable(clk->rate_hz, 0);
		} else if (clk_is_pll2(clk)) {	/* PLL2 */
			chipcHw_pll2Enable(clk->rate_hz);
		} else if (clk_is_using_xtal(clk)) {	/* source is crystal */
			if (!clk_is_primary(clk))
				chipcHw_bypassClockEnable(clk->csp_id);
		} else {	/* source is PLL */
			chipcHw_setClockEnable(clk->csp_id);
		}
	}
}

コード例 #2

static void __clk_enable(struct clk *clk)
{
	if (!clk)
		return;

	
	if (clk->parent)
		__clk_enable(clk->parent);

	if (clk->use_cnt++ == 0) {
		if (clk_is_pll1(clk)) {	
			chipcHw_pll1Enable(clk->rate_hz, 0);
		} else if (clk_is_pll2(clk)) {	
			chipcHw_pll2Enable(clk->rate_hz);
		} else if (clk_is_using_xtal(clk)) {	
			if (!clk_is_primary(clk))
				chipcHw_bypassClockEnable(clk->csp_id);
		} else {	
			chipcHw_setClockEnable(clk->csp_id);
		}
	}
}

コード例 #3

ファイル: clock.c プロジェクト: CSCLOG/beaglebone

int clk_set_parent(struct clk *clk, struct clk *parent)
{
	unsigned long flags;
	struct clk *old_parent;

	if (!clk || !parent)
		return -EINVAL;

	if (!clk_is_primary(parent) || !clk_is_bypassable(clk))
		return -EINVAL;

	/* if more than one user, parent is not allowed */
	if (clk->use_cnt > 1)
		return -EBUSY;

	if (clk->parent == parent)
		return 0;

	spin_lock_irqsave(&clk_lock, flags);
	old_parent = clk->parent;
	clk->parent = parent;
	if (clk_is_using_xtal(parent))
		clk->mode |= CLK_MODE_XTAL;
	else
		clk->mode &= (~CLK_MODE_XTAL);

	/* if clock is active */
	if (clk->use_cnt != 0) {
		clk->use_cnt--;
		/* enable clock with the new parent */
		__clk_enable(clk);
		/* disable the old parent */
		__clk_disable(old_parent);
	}
	spin_unlock_irqrestore(&clk_lock, flags);

	return 0;
}

コード例 #4

int clk_set_parent(struct clk *clk, struct clk *parent)
{
	unsigned long flags;
	struct clk *old_parent;

	if (!clk || !parent)
		return -EINVAL;

	if (!clk_is_primary(parent) || !clk_is_bypassable(clk))
		return -EINVAL;

	
	if (clk->use_cnt > 1)
		return -EBUSY;

	if (clk->parent == parent)
		return 0;

	spin_lock_irqsave(&clk_lock, flags);
	old_parent = clk->parent;
	clk->parent = parent;
	if (clk_is_using_xtal(parent))
		clk->mode |= CLK_MODE_XTAL;
	else
		clk->mode &= (~CLK_MODE_XTAL);

	
	if (clk->use_cnt != 0) {
		clk->use_cnt--;
		
		__clk_enable(clk);
		
		__clk_disable(old_parent);
	}
	spin_unlock_irqrestore(&clk_lock, flags);

	return 0;
}

コード例 #5

ファイル: clock.c プロジェクト: CSCLOG/beaglebone

static void __clk_disable(struct clk *clk)
{
	if (!clk)
		return;

	BUG_ON(clk->use_cnt == 0);

	if (--clk->use_cnt == 0) {
		if (clk_is_pll1(clk)) {	/* PLL1 */
			chipcHw_pll1Disable();
		} else if (clk_is_pll2(clk)) {	/* PLL2 */
			chipcHw_pll2Disable();
		} else if (clk_is_using_xtal(clk)) {	/* source is crystal */
			if (!clk_is_primary(clk))
				chipcHw_bypassClockDisable(clk->csp_id);
		} else {	/* source is PLL */
			chipcHw_setClockDisable(clk->csp_id);
		}
	}

	if (clk->parent)
		__clk_disable(clk->parent);
}