drivers/clk/clk-fractional-divider.c

53 static inline u32 clk_fd_readl(struct clk_fractional_divider *fd)
55 	if (fd->flags & CLK_FRAC_DIVIDER_BIG_ENDIAN)
56 		return ioread32be(fd->reg);
58 	return readl(fd->reg);
61 static inline void clk_fd_writel(struct clk_fractional_divider *fd, u32 val)
63 	if (fd->flags & CLK_FRAC_DIVIDER_BIG_ENDIAN)
64 		iowrite32be(val, fd->reg);
66 		writel(val, fd->reg);
71 	struct clk_fractional_divider *fd = to_clk_fd(hw);
77 	if (fd->lock)
78 		spin_lock_irqsave(fd->lock, flags);
80 		__acquire(fd->lock);
82 	val = clk_fd_readl(fd);
84 	if (fd->lock)
85 		spin_unlock_irqrestore(fd->lock, flags);
87 		__release(fd->lock);
89 	mmask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
90 	nmask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
92 	m = (val & mmask) >> fd->mshift;
93 	n = (val & nmask) >> fd->nshift;
95 	if (fd->flags & CLK_FRAC_DIVIDER_ZERO_BASED) {
125 	struct clk_fractional_divider *fd = to_clk_fd(hw);
131 	 * by (scale - fd->nwidth) bits.
135 	if (fd->flags & CLK_FRAC_DIVIDER_POWER_OF_TWO_PS) {
138 		if (scale > fd->nwidth)
139 			rate <<= scale - fd->nwidth;
142 	if (fd->flags & CLK_FRAC_DIVIDER_ZERO_BASED) {
143 		max_m = BIT(fd->mwidth);
144 		max_n = BIT(fd->nwidth);
146 		max_m = GENMASK(fd->mwidth - 1, 0);
147 		max_n = GENMASK(fd->nwidth - 1, 0);
157 	struct clk_fractional_divider *fd = to_clk_fd(hw);
164 	if (fd->approximation)
165 		fd->approximation(hw, rate, parent_rate, &m, &n);
178 	struct clk_fractional_divider *fd = to_clk_fd(hw);
184 	if (fd->flags & CLK_FRAC_DIVIDER_ZERO_BASED) {
185 		max_m = BIT(fd->mwidth);
186 		max_n = BIT(fd->nwidth);
188 		max_m = GENMASK(fd->mwidth - 1, 0);
189 		max_n = GENMASK(fd->nwidth - 1, 0);
193 	if (fd->flags & CLK_FRAC_DIVIDER_ZERO_BASED) {
198 	mmask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
199 	nmask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
201 	if (fd->lock)
202 		spin_lock_irqsave(fd->lock, flags);
204 		__acquire(fd->lock);
206 	val = clk_fd_readl(fd);
208 	val |= (m << fd->mshift) | (n << fd->nshift);
209 	clk_fd_writel(fd, val);
211 	if (fd->lock)
212 		spin_unlock_irqrestore(fd->lock, flags);
214 		__release(fd->lock);
266 	struct clk_fractional_divider *fd;
271 	fd = kzalloc(sizeof(*fd), GFP_KERNEL);
272 	if (!fd)
281 	fd->reg = reg;
282 	fd->mshift = mshift;
283 	fd->mwidth = mwidth;
284 	fd->nshift = nshift;
285 	fd->nwidth = nwidth;
286 	fd->flags = clk_divider_flags;
287 	fd->lock = lock;
288 	fd->hw.init = &init;
290 	hw = &fd->hw;
293 		kfree(fd);
319 	struct clk_fractional_divider *fd;
321 	fd = to_clk_fd(hw);
324 	kfree(fd);