clk: Change clk_ops->determine_rate to return a clk_hw as the best parent

This is in preparation for clock providers to not have to deal with struct clk.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>

drivers/clk/qcom/clk-rcg2.c

@@ -175,16 +175,17 @@ clk_rcg2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
 
 static long _freq_tbl_determine_rate(struct clk_hw *hw,
 		const struct freq_tbl *f, unsigned long rate,
-		unsigned long *p_rate, struct clk **p)
+		unsigned long *p_rate, struct clk_hw **p_hw)
 {
 	unsigned long clk_flags;
+	struct clk *p;
 
 	f = qcom_find_freq(f, rate);
 	if (!f)
 		return -EINVAL;
 
 	clk_flags = __clk_get_flags(hw->clk);
-	*p = clk_get_parent_by_index(hw->clk, f->src);
+	p = clk_get_parent_by_index(hw->clk, f->src);
 	if (clk_flags & CLK_SET_RATE_PARENT) {
 		if (f->pre_div) {
 			rate /= 2;
@@ -198,15 +199,16 @@ static long _freq_tbl_determine_rate(struct clk_hw *hw,
 			rate = tmp;
 		}
 	} else {
-		rate =  __clk_get_rate(*p);
+		rate =  __clk_get_rate(p);
 	}
+	*p_hw = __clk_get_hw(p);
 	*p_rate = rate;
 
 	return f->freq;
 }
 
 static long clk_rcg2_determine_rate(struct clk_hw *hw, unsigned long rate,
-		unsigned long *p_rate, struct clk **p)
+		unsigned long *p_rate, struct clk_hw **p)
 {
 	struct clk_rcg2 *rcg = to_clk_rcg2(hw);
 
@@ -359,7 +361,7 @@ static int clk_edp_pixel_set_rate_and_parent(struct clk_hw *hw,
 }
 
 static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
-				 unsigned long *p_rate, struct clk **p)
+				 unsigned long *p_rate, struct clk_hw **p)
 {
 	struct clk_rcg2 *rcg = to_clk_rcg2(hw);
 	const struct freq_tbl *f = rcg->freq_tbl;
@@ -371,7 +373,7 @@ static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
 	u32 hid_div;
 
 	/* Force the correct parent */
-	*p = clk_get_parent_by_index(hw->clk, f->src);
+	*p = __clk_get_hw(clk_get_parent_by_index(hw->clk, f->src));
 
 	if (src_rate == 810000000)
 		frac = frac_table_810m;
@@ -410,18 +412,20 @@ const struct clk_ops clk_edp_pixel_ops = {
 EXPORT_SYMBOL_GPL(clk_edp_pixel_ops);
 
 static long clk_byte_determine_rate(struct clk_hw *hw, unsigned long rate,
-			 unsigned long *p_rate, struct clk **p)
+			 unsigned long *p_rate, struct clk_hw **p_hw)
 {
 	struct clk_rcg2 *rcg = to_clk_rcg2(hw);
 	const struct freq_tbl *f = rcg->freq_tbl;
 	unsigned long parent_rate, div;
 	u32 mask = BIT(rcg->hid_width) - 1;
+	struct clk *p;
 
 	if (rate == 0)
 		return -EINVAL;
 
-	*p = clk_get_parent_by_index(hw->clk, f->src);
-	*p_rate = parent_rate = __clk_round_rate(*p, rate);
+	p = clk_get_parent_by_index(hw->clk, f->src);
+	*p_hw = __clk_get_hw(p);
+	*p_rate = parent_rate = __clk_round_rate(p, rate);
 
 	div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
 	div = min_t(u32, div, mask);
@@ -472,14 +476,16 @@ static const struct frac_entry frac_table_pixel[] = {
 };
 
 static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
-				 unsigned long *p_rate, struct clk **p)
+				 unsigned long *p_rate, struct clk_hw **p)
 {
 	struct clk_rcg2 *rcg = to_clk_rcg2(hw);
 	unsigned long request, src_rate;
 	int delta = 100000;
 	const struct freq_tbl *f = rcg->freq_tbl;
 	const struct frac_entry *frac = frac_table_pixel;
-	struct clk *parent = *p = clk_get_parent_by_index(hw->clk, f->src);
+	struct clk *parent = clk_get_parent_by_index(hw->clk, f->src);
+
+	*p = __clk_get_hw(parent);
 
 	for (; frac->num; frac++) {
 		request = (rate * frac->den) / frac->num;