[PATCH v2 4/7] clk: sunxi-ng: Add N-class clocks support
From: Chen-Yu Tsai <hidden>
Date: 2016-09-07 06:45:48
Also in:
linux-clk, linux-devicetree, lkml
On Tue, Sep 6, 2016 at 8:18 PM, Maxime Ripard [off-list ref] wrote:
Add support for the class with a single factor, N, being a multiplier. Signed-off-by: Maxime Ripard <redacted> Acked-by: Chen-Yu Tsai <redacted> ---
[...]
quoted hunk ↗ jump to hunk
diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c new file mode 100644 index 000000000000..119b190c0eb5 --- /dev/null +++ b/drivers/clk/sunxi-ng/ccu_mult.c
[...]
+static int ccu_mult_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct ccu_mult *cm = hw_to_ccu_mult(hw);
+ unsigned long flags;
+ unsigned int n;
+ u32 reg;
+
+ ccu_mux_helper_adjust_parent_for_prediv(&cm->common, &cm->mux, -1,
+ &parent_rate);
+Git complains about extra whitespace here. You can keep my ack after fixing it. ChenYu
+ ccu_mult_find_best(parent_rate, rate, 1 << cm->mult.width, &n); + + spin_lock_irqsave(cm->common.lock, flags); + + reg = readl(cm->common.base + cm->common.reg); + reg &= ~GENMASK(cm->mult.width + cm->mult.shift - 1, cm->mult.shift); + + writel(reg | ((n - 1) << cm->mult.shift), + cm->common.base + cm->common.reg); + + spin_unlock_irqrestore(cm->common.lock, flags); + + return 0; +}