sunxi: add support for 4.1

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

SVN-Revision: 46571

1 files changed, 287 insertions, 0 deletions

diff --git a/target/linux/sunxi/patches-4.1/161-clk-sunxi-add-pll2-for-sun457i.patch b/target/linux/sunxi/patches-4.1/161-clk-sunxi-add-pll2-for-sun457i.patch
new file mode 100644
index 0000000..150be41
--- /dev/null
+++ b/target/linux/sunxi/patches-4.1/161-clk-sunxi-add-pll2-for-sun457i.patch
@@ -0,0 +1,287 @@
+From ea6871c5b3a934d0bfe08082e95c3b952f93ef39 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Emilio=20L=C3=B3pez?= <emilio@elopez.com.ar>
+Date: Fri, 18 Jul 2014 15:48:35 -0300
+Subject: [PATCH] clk: sunxi: PLL2 support for sun4i, sun5i and sun7i
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This patch adds support for PLL2 and derivates on A10 revision B and
+higher, as well as on sun5i and sun7i SoCs. As this PLL is only used for
+audio and requires good accuracy, we only support two known good rates.
+
+Signed-off-by: Emilio López <emilio@elopez.com.ar>
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/clk/sunxi/Makefile       |   1 +
+ drivers/clk/sunxi/clk-a10-pll2.c | 249 +++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 250 insertions(+)
+ create mode 100644 drivers/clk/sunxi/clk-a10-pll2.c
+
+diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
+index 058f273..eb36c38 100644
+--- a/drivers/clk/sunxi/Makefile
++++ b/drivers/clk/sunxi/Makefile
+@@ -4,6 +4,7 @@
+ 
+ obj-y += clk-sunxi.o clk-factors.o
+ obj-y += clk-a10-hosc.o
++obj-y += clk-a10-pll2.o
+ obj-y += clk-a20-gmac.o
+ obj-y += clk-mod0.o
+ obj-y += clk-sun8i-mbus.o
+diff --git a/drivers/clk/sunxi/clk-a10-pll2.c b/drivers/clk/sunxi/clk-a10-pll2.c
+new file mode 100644
+index 0000000..bdbf1e9
+--- /dev/null
++++ b/drivers/clk/sunxi/clk-a10-pll2.c
+@@ -0,0 +1,249 @@
++/*
++ * Copyright 2013 Emilio López
++ *
++ * Emilio López <emilio@elopez.com.ar>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/clk-provider.h>
++#include <linux/of.h>
++#include <linux/of_address.h>
++#include <linux/slab.h>
++
++#define SUN4I_PLL2_ENABLE		31
++#define SUN4I_PLL2_POST_DIV		26
++#define SUN4I_PLL2_POST_DIV_MASK	0xF
++#define SUN4I_PLL2_N			8
++#define SUN4I_PLL2_N_MASK		0x7F
++#define SUN4I_PLL2_PRE_DIV		0
++#define SUN4I_PLL2_PRE_DIV_MASK		0x1F
++
++#define SUN4I_PLL2_OUTPUTS		4
++
++struct sun4i_pll2_clk {
++	struct clk_hw hw;
++	void __iomem *reg;
++};
++
++static inline struct sun4i_pll2_clk *to_sun4i_pll2_clk(struct clk_hw *hw)
++{
++	return container_of(hw, struct sun4i_pll2_clk, hw);
++}
++
++static unsigned long sun4i_pll2_1x_recalc_rate(struct clk_hw *hw,
++					    unsigned long parent_rate)
++{
++	struct sun4i_pll2_clk *clk = to_sun4i_pll2_clk(hw);
++	int n, prediv, postdiv;
++
++	u32 val = readl(clk->reg);
++	n = (val >> SUN4I_PLL2_N) & SUN4I_PLL2_N_MASK;
++	prediv = (val >> SUN4I_PLL2_PRE_DIV) & SUN4I_PLL2_PRE_DIV_MASK;
++	postdiv = (val >> SUN4I_PLL2_POST_DIV) & SUN4I_PLL2_POST_DIV_MASK;
++
++	/* 0 is a special case and means 1 */
++	if (n == 0)
++		n = 1;
++	if (prediv == 0)
++		prediv = 1;
++	if (postdiv == 0)
++		postdiv = 1;
++
++	return ((parent_rate * n) / prediv) / postdiv;
++}
++
++static unsigned long sun4i_pll2_8x_recalc_rate(struct clk_hw *hw,
++					       unsigned long parent_rate)
++{
++	struct sun4i_pll2_clk *clk = to_sun4i_pll2_clk(hw);
++	int n, prediv;
++
++	u32 val = readl(clk->reg);
++	n = (val >> SUN4I_PLL2_N) & SUN4I_PLL2_N_MASK;
++	prediv = (val >> SUN4I_PLL2_PRE_DIV) & SUN4I_PLL2_PRE_DIV_MASK;
++
++	/* 0 is a special case and means 1 */
++	if (n == 0)
++		n = 1;
++	if (prediv == 0)
++		prediv = 1;
++
++	return ((parent_rate * 2 * n) / prediv);
++}
++
++static unsigned long sun4i_pll2_4x_recalc_rate(struct clk_hw *hw,
++					       unsigned long parent_rate)
++{
++	return sun4i_pll2_8x_recalc_rate(hw, parent_rate / 2);
++}
++
++static unsigned long sun4i_pll2_2x_recalc_rate(struct clk_hw *hw,
++					       unsigned long parent_rate)
++{
++	return sun4i_pll2_8x_recalc_rate(hw, parent_rate / 4);
++}
++
++static long sun4i_pll2_1x_round_rate(struct clk_hw *hw, unsigned long rate,
++				     unsigned long *parent_rate)
++{
++	/*
++	 * There is only two interesting rates for the audio PLL, the
++	 * rest isn't really usable due to accuracy concerns. Therefore,
++	 * we specifically round to those rates here
++	 */
++	if (rate < 22579200)
++		return -EINVAL;
++
++	if (rate >= 22579200 && rate < 24576000)
++		return 22579200;
++
++	return 24576000;
++}
++
++static long sun4i_pll2_8x_round_rate(struct clk_hw *hw, unsigned long rate,
++				     unsigned long *parent_rate)
++{
++	/*
++	 * We should account for the postdiv that we're undoing on PLL2x8,
++	 * which is always 4 in the usable configurations. The division
++	 * by two is done because PLL2x8 also doubles the rate
++	 */
++	*parent_rate = (rate * 4) / 2;
++
++	return rate;
++}
++
++static long sun4i_pll2_4x_round_rate(struct clk_hw *hw, unsigned long rate,
++				     unsigned long *parent_rate)
++{
++	/* PLL2x4 * 2 = PLL2x8 */
++	return sun4i_pll2_8x_round_rate(hw, rate * 2, parent_rate);
++}
++
++static long sun4i_pll2_2x_round_rate(struct clk_hw *hw, unsigned long rate,
++				     unsigned long *parent_rate)
++{
++	/* PLL2x2 * 4 = PLL2x8 */
++	return sun4i_pll2_8x_round_rate(hw, rate * 4, parent_rate);
++}
++
++static int sun4i_pll2_set_rate(struct clk_hw *hw, unsigned long rate,
++			       unsigned long parent_rate)
++{
++	struct sun4i_pll2_clk *clk = to_sun4i_pll2_clk(hw);
++	u32 val = readl(clk->reg);
++
++	val &= ~(SUN4I_PLL2_N_MASK << SUN4I_PLL2_N);
++	val &= ~(SUN4I_PLL2_PRE_DIV_MASK << SUN4I_PLL2_PRE_DIV);
++	val &= ~(SUN4I_PLL2_POST_DIV_MASK << SUN4I_PLL2_POST_DIV);
++
++	val |= (21 << SUN4I_PLL2_PRE_DIV) | (4 << SUN4I_PLL2_POST_DIV);
++
++	if (rate == 22579200)
++		val |= (79 << SUN4I_PLL2_N);
++	else if (rate == 24576000)
++		val |= (86 << SUN4I_PLL2_N);
++	else
++		return -EINVAL;
++
++	writel(val, clk->reg);
++
++	return 0;
++}
++
++static struct clk_ops sun4i_pll2_ops_1x = {
++	.recalc_rate = sun4i_pll2_1x_recalc_rate,
++	.round_rate = sun4i_pll2_1x_round_rate,
++	.set_rate = sun4i_pll2_set_rate,
++};
++
++static struct clk_ops sun4i_pll2_ops_2x = {
++	.recalc_rate = sun4i_pll2_2x_recalc_rate,
++	.round_rate = sun4i_pll2_2x_round_rate,
++};
++
++static struct clk_ops sun4i_pll2_ops_4x = {
++	.recalc_rate = sun4i_pll2_4x_recalc_rate,
++	.round_rate = sun4i_pll2_4x_round_rate,
++};
++
++static struct clk_ops sun4i_pll2_ops_8x = {
++	.recalc_rate = sun4i_pll2_8x_recalc_rate,
++	.round_rate = sun4i_pll2_8x_round_rate,
++};
++
++static void __init sun4i_pll2_setup(struct device_node *np)
++{
++	const char *clk_name = np->name, *parent;
++	struct clk_onecell_data *clk_data;
++	struct sun4i_pll2_clk *pll2;
++	struct clk_gate *gate;
++	struct clk **clks;
++	void __iomem *reg;
++
++	pll2 = kzalloc(sizeof(*pll2), GFP_KERNEL);
++	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
++	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
++	clks = kcalloc(SUN4I_PLL2_OUTPUTS, sizeof(struct clk *), GFP_KERNEL);
++	if (!pll2 || !gate || !clk_data || !clks)
++		goto free_mem;
++
++	reg = of_iomap(np, 0);
++	parent = of_clk_get_parent_name(np, 0);
++	of_property_read_string_index(np, "clock-output-names", 0, &clk_name);
++
++	pll2->reg = reg;
++	gate->reg = reg;
++	gate->bit_idx = SUN4I_PLL2_ENABLE;
++
++	/* PLL2, also known as PLL2x1 */
++	of_property_read_string_index(np, "clock-output-names", 0, &clk_name);
++	clks[0] = clk_register_composite(NULL, clk_name, &parent, 1, NULL, NULL,
++					 &pll2->hw, &sun4i_pll2_ops_1x,
++					 &gate->hw, &clk_gate_ops, 0);
++	WARN_ON(IS_ERR(clks[0]));
++	parent = clk_name;
++
++	/* PLL2x2, 1/4 the rate of PLL2x8 */
++	of_property_read_string_index(np, "clock-output-names", 1, &clk_name);
++	clks[1] = clk_register_composite(NULL, clk_name, &parent, 1, NULL, NULL,
++					 &pll2->hw, &sun4i_pll2_ops_2x,
++					 NULL, NULL, CLK_SET_RATE_PARENT);
++	WARN_ON(IS_ERR(clks[1]));
++
++	/* PLL2x4, 1/2 the rate of PLL2x8 */
++	of_property_read_string_index(np, "clock-output-names", 2, &clk_name);
++	clks[2] = clk_register_composite(NULL, clk_name, &parent, 1, NULL, NULL,
++					 &pll2->hw, &sun4i_pll2_ops_4x,
++					 NULL, NULL, CLK_SET_RATE_PARENT);
++	WARN_ON(IS_ERR(clks[2]));
++
++	/* PLL2x8, double of PLL2 without the post divisor */
++	of_property_read_string_index(np, "clock-output-names", 3, &clk_name);
++	clks[3] = clk_register_composite(NULL, clk_name, &parent, 1, NULL, NULL,
++					 &pll2->hw, &sun4i_pll2_ops_8x,
++					 NULL, NULL, CLK_SET_RATE_PARENT);
++	WARN_ON(IS_ERR(clks[3]));
++
++	clk_data->clks = clks;
++	clk_data->clk_num = SUN4I_PLL2_OUTPUTS;
++	of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
++
++	return;
++
++free_mem:
++	kfree(pll2);
++	kfree(gate);
++	kfree(clk_data);
++	kfree(clks);
++}
++CLK_OF_DECLARE(sun4i_pll2, "allwinner,sun4i-a10-b-pll2-clk", sun4i_pll2_setup);