Ejemplos de to_clk_fd en C++ (Cpp)

Ejemplo n.º 1

Archivo: clk-fractional-divider.c Proyecto: avpatel/xvisor-next

static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
			   unsigned long parent_rate)
{
	struct clk_fractional_divider *fd = to_clk_fd(hw);
	unsigned long flags = 0;
	unsigned long m, n;
	u32 val;

	rational_best_approximation(rate, parent_rate,
			GENMASK(fd->mwidth - 1, 0), GENMASK(fd->nwidth - 1, 0),
			&m, &n);

	if (fd->lock)
		spin_lock_irqsave(fd->lock, flags);
#if 0
	else
		__acquire(fd->lock);
#endif

	val = clk_readl(fd->reg);
	val &= ~(fd->mmask | fd->nmask);
	val |= (m << fd->mshift) | (n << fd->nshift);
	clk_writel(val, fd->reg);

	if (fd->lock)
		spin_unlock_irqrestore(fd->lock, flags);
#if 0
	else
		__release(fd->lock);
#endif

	return 0;
}

Ejemplo n.º 2

Archivo: clk-fractional-divider.c Proyecto: DenisLug/mptcp

static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
			   unsigned long parent_rate)
{
	struct clk_fractional_divider *fd = to_clk_fd(hw);
	unsigned long flags = 0;
	unsigned long div;
	unsigned n, m;
	u32 val;

	div = gcd(parent_rate, rate);
	m = rate / div;
	n = parent_rate / div;

	if (fd->lock)
		spin_lock_irqsave(fd->lock, flags);
	else
		__acquire(fd->lock);

	val = clk_readl(fd->reg);
	val &= ~(fd->mmask | fd->nmask);
	val |= (m << fd->mshift) | (n << fd->nshift);
	clk_writel(val, fd->reg);

	if (fd->lock)
		spin_unlock_irqrestore(fd->lock, flags);
	else
		__release(fd->lock);

	return 0;
}

Ejemplo n.º 3

Archivo: clk-fractional-divider.c Proyecto: DenisLug/mptcp

static unsigned long clk_fd_recalc_rate(struct clk_hw *hw,
					unsigned long parent_rate)
{
	struct clk_fractional_divider *fd = to_clk_fd(hw);
	unsigned long flags = 0;
	u32 val, m, n;
	u64 ret;

	if (fd->lock)
		spin_lock_irqsave(fd->lock, flags);
	else
		__acquire(fd->lock);

	val = clk_readl(fd->reg);

	if (fd->lock)
		spin_unlock_irqrestore(fd->lock, flags);
	else
		__release(fd->lock);

	m = (val & fd->mmask) >> fd->mshift;
	n = (val & fd->nmask) >> fd->nshift;

	if (!n || !m)
		return parent_rate;

	ret = (u64)parent_rate * m;
	do_div(ret, n);

	return ret;
}

Ejemplo n.º 4

Archivo: clk-fractional-divider.c Proyecto: avagin/linux

static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
			   unsigned long parent_rate)
{
	struct clk_fractional_divider *fd = to_clk_fd(hw);
	unsigned long flags = 0;
	unsigned long m, n;
	u32 val;

	rational_best_approximation(rate, parent_rate,
			GENMASK(fd->mwidth - 1, 0), GENMASK(fd->nwidth - 1, 0),
			&m, &n);

	if (fd->flags & CLK_FRAC_DIVIDER_ZERO_BASED) {
		m--;
		n--;
	}

	if (fd->lock)
		spin_lock_irqsave(fd->lock, flags);
	else
		__acquire(fd->lock);

	val = clk_fd_readl(fd);
	val &= ~(fd->mmask | fd->nmask);
	val |= (m << fd->mshift) | (n << fd->nshift);
	clk_fd_writel(fd, val);

	if (fd->lock)
		spin_unlock_irqrestore(fd->lock, flags);
	else
		__release(fd->lock);

	return 0;
}

Ejemplo n.º 5

Archivo: clk-fractional-divider.c Proyecto: avpatel/xvisor-next

void clk_hw_unregister_fractional_divider(struct clk_hw *hw)
{
	struct clk_fractional_divider *fd;

	fd = to_clk_fd(hw);

	clk_hw_unregister(hw);
	kfree(fd);
}

Ejemplo n.º 6

Archivo: clk-fractional-divider.c Proyecto: DenisLug/mptcp

static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
			      unsigned long *prate)
{
	struct clk_fractional_divider *fd = to_clk_fd(hw);
	unsigned maxn = (fd->nmask >> fd->nshift) + 1;
	unsigned div;

	if (!rate || rate >= *prate)
		return *prate;

	div = gcd(*prate, rate);

	while ((*prate / div) > maxn) {
		div <<= 1;
		rate <<= 1;
	}

	return rate;
}

Ejemplo n.º 7

Archivo: clk-fractional-divider.c Proyecto: avpatel/xvisor-next

static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
			      unsigned long *parent_rate)
{
	struct clk_fractional_divider *fd = to_clk_fd(hw);
	unsigned long m, n;
	u64 ret;

	if (!rate || rate >= *parent_rate)
		return *parent_rate;

	if (fd->approximation)
		fd->approximation(hw, rate, parent_rate, &m, &n);
	else
		clk_fd_general_approximation(hw, rate, parent_rate, &m, &n);

	ret = (u64)*parent_rate * m;
	ret = udiv64(ret, n);

	return ret;
}

Ejemplo n.º 8

Archivo: clk-fractional-divider.c Proyecto: avpatel/xvisor-next

static void clk_fd_general_approximation(struct clk_hw *hw, unsigned long rate,
					 unsigned long *parent_rate,
					 unsigned long *m, unsigned long *n)
{
	struct clk_fractional_divider *fd = to_clk_fd(hw);
	unsigned long scale;

	/*
	 * Get rate closer to *parent_rate to guarantee there is no overflow
	 * for m and n. In the result it will be the nearest rate left shifted
	 * by (scale - fd->nwidth) bits.
	 */
	scale = fls_long((unsigned long)udiv64(*parent_rate, rate) - 1);
	if (scale > fd->nwidth)
		rate <<= scale - fd->nwidth;

	rational_best_approximation(rate, *parent_rate,
			GENMASK(fd->mwidth - 1, 0), GENMASK(fd->nwidth - 1, 0),
			m, n);
}