openwrt/target/linux/sunxi/patches-4.9/0004-clk-sunxi-ng-Finish-to-convert-to-structures-for-arg.patch

From b8302c7267dedaeeb1bf38143f099defbf16dce8 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard@free-electrons.com>
Date: Thu, 29 Sep 2016 23:50:21 +0200
Subject: clk: sunxi-ng: Finish to convert to structures for arguments

Some clocks still use an explicit list of arguments, which make it a bit
more tedious to add new parameters.

Convert those over to a structure pointer argument to add as many
arguments as possible without having to many noise in our patches, or a
very long list of arguments.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/clk/sunxi-ng/ccu_mult.c | 28 ++++++++++++++++++++--------
 drivers/clk/sunxi-ng/ccu_nk.c   | 39 ++++++++++++++++++++++-----------------
 2 files changed, 42 insertions(+), 25 deletions(-)

--- a/drivers/clk/sunxi-ng/ccu_mult.c
+++ b/drivers/clk/sunxi-ng/ccu_mult.c
@@ -13,10 +13,20 @@
 #include "ccu_gate.h"
 #include "ccu_mult.h"
 
+struct _ccu_mult {
+	unsigned long	mult, max;
+};
+
 static void ccu_mult_find_best(unsigned long parent, unsigned long rate,
-			       unsigned int max_n, unsigned int *n)
+			       struct _ccu_mult *mult)
 {
-	*n = rate / parent;
+	int _mult;
+
+	_mult = rate / parent;
+	if (_mult > mult->max)
+		_mult = mult->max;
+
+	mult->mult = _mult;
 }
 
 static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux,
@@ -25,11 +35,12 @@ static unsigned long ccu_mult_round_rate
 					void *data)
 {
 	struct ccu_mult *cm = data;
-	unsigned int n;
+	struct _ccu_mult _cm;
 
-	ccu_mult_find_best(parent_rate, rate, 1 << cm->mult.width, &n);
+	_cm.max = 1 << cm->mult.width;
+	ccu_mult_find_best(parent_rate, rate, &_cm);
 
-	return parent_rate * n;
+	return parent_rate * _cm.mult;
 }
 
 static void ccu_mult_disable(struct clk_hw *hw)
@@ -83,21 +94,22 @@ static int ccu_mult_set_rate(struct clk_
 			   unsigned long parent_rate)
 {
 	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+	struct _ccu_mult _cm;
 	unsigned long flags;
-	unsigned int n;
 	u32 reg;
 
 	ccu_mux_helper_adjust_parent_for_prediv(&cm->common, &cm->mux, -1,
 						&parent_rate);
 
-	ccu_mult_find_best(parent_rate, rate, 1 << cm->mult.width, &n);
+	_cm.max = 1 << cm->mult.width;
+	ccu_mult_find_best(parent_rate, rate, &_cm);
 
 	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),
+	writel(reg | ((_cm.mult - 1) << cm->mult.shift),
 	       cm->common.base + cm->common.reg);
 
 	spin_unlock_irqrestore(cm->common.lock, flags);
--- a/drivers/clk/sunxi-ng/ccu_nk.c
+++ b/drivers/clk/sunxi-ng/ccu_nk.c
@@ -9,21 +9,24 @@
  */
 
 #include <linux/clk-provider.h>
-#include <linux/rational.h>
 
 #include "ccu_gate.h"
 #include "ccu_nk.h"
 
+struct _ccu_nk {
+	unsigned long	n, max_n;
+	unsigned long	k, max_k;
+};
+
 static void ccu_nk_find_best(unsigned long parent, unsigned long rate,
-			     unsigned int max_n, unsigned int max_k,
-			     unsigned int *n, unsigned int *k)
+			     struct _ccu_nk *nk)
 {
 	unsigned long best_rate = 0;
 	unsigned int best_k = 0, best_n = 0;
 	unsigned int _k, _n;
 
-	for (_k = 1; _k <= max_k; _k++) {
-		for (_n = 1; _n <= max_n; _n++) {
+	for (_k = 1; _k <= nk->max_k; _k++) {
+		for (_n = 1; _n <= nk->max_n; _n++) {
 			unsigned long tmp_rate = parent * _n * _k;
 
 			if (tmp_rate > rate)
@@ -37,8 +40,8 @@ static void ccu_nk_find_best(unsigned lo
 		}
 	}
 
-	*k = best_k;
-	*n = best_n;
+	nk->k = best_k;
+	nk->n = best_n;
 }
 
 static void ccu_nk_disable(struct clk_hw *hw)
@@ -89,16 +92,17 @@ static long ccu_nk_round_rate(struct clk
 			      unsigned long *parent_rate)
 {
 	struct ccu_nk *nk = hw_to_ccu_nk(hw);
-	unsigned int n, k;
+	struct _ccu_nk _nk;
 
 	if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
 		rate *= nk->fixed_post_div;
 
-	ccu_nk_find_best(*parent_rate, rate,
-			 1 << nk->n.width, 1 << nk->k.width,
-			 &n, &k);
+	_nk.max_n = 1 << nk->n.width;
+	_nk.max_k = 1 << nk->k.width;
+
+	ccu_nk_find_best(*parent_rate, rate, &_nk);
+	rate = *parent_rate * _nk.n * _nk.k;
 
-	rate = *parent_rate * n * k;
 	if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
 		rate = rate / nk->fixed_post_div;
 
@@ -110,15 +114,16 @@ static int ccu_nk_set_rate(struct clk_hw
 {
 	struct ccu_nk *nk = hw_to_ccu_nk(hw);
 	unsigned long flags;
-	unsigned int n, k;
+	struct _ccu_nk _nk;
 	u32 reg;
 
 	if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
 		rate = rate * nk->fixed_post_div;
 
-	ccu_nk_find_best(parent_rate, rate,
-			 1 << nk->n.width, 1 << nk->k.width,
-			 &n, &k);
+	_nk.max_n = 1 << nk->n.width;
+	_nk.max_k = 1 << nk->k.width;
+
+	ccu_nk_find_best(parent_rate, rate, &_nk);
 
 	spin_lock_irqsave(nk->common.lock, flags);
 
@@ -126,7 +131,7 @@ static int ccu_nk_set_rate(struct clk_hw
 	reg &= ~GENMASK(nk->n.width + nk->n.shift - 1, nk->n.shift);
 	reg &= ~GENMASK(nk->k.width + nk->k.shift - 1, nk->k.shift);
 
-	writel(reg | ((k - 1) << nk->k.shift) | ((n - 1) << nk->n.shift),
+	writel(reg | ((_nk.k - 1) << nk->k.shift) | ((_nk.n - 1) << nk->n.shift),
 	       nk->common.base + nk->common.reg);
 
 	spin_unlock_irqrestore(nk->common.lock, flags);