ipq806x: Add support for IPQ806x chip family

Patches are generated using the "format-patch" command from the
following location:
*https://www.codeaurora.org/cgit/quic/kernel/galak-msm/log/?h=apq_ipq_base
*rev=0771849495b4128cac2faf7d49c85c729fc48b20
Patches numbered 76/77/102/103 have already been integrated in 3.14.12,
so they're not in this list.

All these patches are either integrated are pending integration into
kernel.org, therefore these patches should go away once the kernel
gets upgraded to 3.16.

Support is currently limited to AP148 board but can be extended to other
platforms in the future.

These changes do not cover ethernet connectivity.

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 42334

1 files changed, 420 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches/0171-clk-qcom-Add-Krait-clock-controller-driver.patch b/target/linux/ipq806x/patches/0171-clk-qcom-Add-Krait-clock-controller-driver.patch
new file mode 100644
index 0000000000..8fa83dfdc2
--- /dev/null
+++ b/target/linux/ipq806x/patches/0171-clk-qcom-Add-Krait-clock-controller-driver.patch
@@ -0,0 +1,420 @@
+From 6912e27d97ba5671e8c2434bed0ebd23fde5e13d Mon Sep 17 00:00:00 2001
+From: Stephen Boyd <sboyd@codeaurora.org>
+Date: Wed, 18 Jun 2014 14:29:29 -0700
+Subject: [PATCH 171/182] clk: qcom: Add Krait clock controller driver
+
+The Krait CPU clocks are made up of a primary mux and secondary
+mux for each CPU and the L2, controlled via cp15 accessors. For
+Kraits within KPSSv1 each secondary mux accepts a different aux
+source, but on KPSSv2 each secondary mux accepts the same aux
+source.
+
+Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
+---
+ drivers/clk/qcom/Kconfig    |    8 +
+ drivers/clk/qcom/Makefile   |    1 +
+ drivers/clk/qcom/krait-cc.c |  364 +++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 373 insertions(+)
+ create mode 100644 drivers/clk/qcom/krait-cc.c
+
+diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
+index e9e5360..7418108 100644
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -70,6 +70,14 @@ config KPSS_XCC
+ 	  if you want to support CPU frequency scaling on devices such
+ 	  as MSM8960, APQ8064, etc.
+ 
++config KRAITCC
++	tristate "Krait Clock Controller"
++	depends on COMMON_CLK_QCOM && ARM
++	select KRAIT_CLOCKS
++	help
++	  Support for the Krait CPU clocks on Qualcomm devices.
++	  Say Y if you want to support CPU frequency scaling.
++
+ config KRAIT_CLOCKS
+ 	bool
+ 	select KRAIT_L2_ACCESSORS
+diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
+index 29b2a45..1b88abe 100644
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -19,3 +19,4 @@ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
+ obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
+ obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
++obj-$(CONFIG_KRAITCC) += krait-cc.o
+diff --git a/drivers/clk/qcom/krait-cc.c b/drivers/clk/qcom/krait-cc.c
+new file mode 100644
+index 0000000..90985ea
+--- /dev/null
++++ b/drivers/clk/qcom/krait-cc.c
+@@ -0,0 +1,364 @@
++/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * 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/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++#include <linux/slab.h>
++
++#include <asm/smp_plat.h>
++
++#include "clk-krait.h"
++
++DEFINE_FIXED_DIV_CLK(acpu_aux, 2, "gpll0_vote");
++
++static u8 sec_mux_map[] = {
++	2,
++	0,
++};
++
++static u8 pri_mux_map[] = {
++	1,
++	2,
++	0,
++};
++
++static int
++krait_add_div(struct device *dev, int id, const char *s, unsigned offset)
++{
++	struct div_clk *div;
++	struct clk_init_data init = {
++		.num_parents = 1,
++		.ops = &clk_ops_div,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	const char *p_names[1];
++	struct clk *clk;
++
++	div = devm_kzalloc(dev, sizeof(*dev), GFP_KERNEL);
++	if (!div)
++		return -ENOMEM;
++
++	div->data.div = 2;
++	div->data.min_div = 2;
++	div->data.max_div = 2;
++	div->ops = &clk_div_ops_kpss_div2;
++	div->mask = 0x3;
++	div->shift = 6;
++	div->priv = (void *)(id >= 0);
++	div->offset = offset;
++	div->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "hfpll%s_div", s);
++	if (!init.name)
++		return -ENOMEM;
++
++	init.parent_names = p_names;
++	p_names[0] = kasprintf(GFP_KERNEL, "hfpll%s", s);
++	if (!p_names[0]) {
++		kfree(init.name);
++		return -ENOMEM;
++	}
++
++	clk = devm_clk_register(dev, &div->hw);
++	kfree(p_names[0]);
++	kfree(init.name);
++
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static int
++krait_add_sec_mux(struct device *dev, int id, const char *s, unsigned offset,
++		  bool unique_aux)
++{
++	struct mux_clk *mux;
++	static const char *sec_mux_list[] = {
++		"acpu_aux",
++		"qsb",
++	};
++	struct clk_init_data init = {
++		.parent_names = sec_mux_list,
++		.num_parents = ARRAY_SIZE(sec_mux_list),
++		.ops = &clk_ops_gen_mux,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	struct clk *clk;
++
++	mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
++	if (!mux)
++		return -ENOMEM;
++
++	mux->offset = offset;
++	mux->priv = (void *)(id >= 0);
++	mux->has_safe_parent = true;
++	mux->safe_sel = 2;
++	mux->ops = &clk_mux_ops_kpss;
++	mux->mask = 0x3;
++	mux->shift = 2;
++	mux->parent_map = sec_mux_map;
++	mux->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "krait%s_sec_mux", s);
++	if (!init.name)
++		return -ENOMEM;
++
++	if (unique_aux) {
++		sec_mux_list[0] = kasprintf(GFP_KERNEL, "acpu%s_aux", s);
++		if (!sec_mux_list[0]) {
++			clk = ERR_PTR(-ENOMEM);
++			goto err_aux;
++		}
++	}
++
++	clk = devm_clk_register(dev, &mux->hw);
++
++	if (unique_aux)
++		kfree(sec_mux_list[0]);
++err_aux:
++	kfree(init.name);
++	return PTR_ERR_OR_ZERO(clk);
++}
++
++static struct clk *
++krait_add_pri_mux(struct device *dev, int id, const char * s, unsigned offset)
++{
++	struct mux_clk *mux;
++	const char *p_names[3];
++	struct clk_init_data init = {
++		.parent_names = p_names,
++		.num_parents = ARRAY_SIZE(p_names),
++		.ops = &clk_ops_gen_mux,
++		.flags = CLK_SET_RATE_PARENT,
++	};
++	struct clk *clk;
++
++	mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
++	if (!mux)
++		return ERR_PTR(-ENOMEM);
++
++	mux->has_safe_parent = true;
++	mux->safe_sel = 0;
++	mux->ops = &clk_mux_ops_kpss;
++	mux->mask = 0x3;
++	mux->shift = 0;
++	mux->offset = offset;
++	mux->priv = (void *)(id >= 0);
++	mux->parent_map = pri_mux_map;
++	mux->hw.init = &init;
++
++	init.name = kasprintf(GFP_KERNEL, "krait%s_pri_mux", s);
++	if (!init.name)
++		return ERR_PTR(-ENOMEM);
++
++	p_names[0] = kasprintf(GFP_KERNEL, "hfpll%s", s);
++	if (!p_names[0]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p0;
++	}
++
++	p_names[1] = kasprintf(GFP_KERNEL, "hfpll%s_div", s);
++	if (!p_names[1]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p1;
++	}
++
++	p_names[2] = kasprintf(GFP_KERNEL, "krait%s_sec_mux", s);
++	if (!p_names[2]) {
++		clk = ERR_PTR(-ENOMEM);
++		goto err_p2;
++	}
++
++	clk = devm_clk_register(dev, &mux->hw);
++
++	kfree(p_names[2]);
++err_p2:
++	kfree(p_names[1]);
++err_p1:
++	kfree(p_names[0]);
++err_p0:
++	kfree(init.name);
++	return clk;
++}
++
++/* id < 0 for L2, otherwise id == physical CPU number */
++static struct clk *krait_add_clks(struct device *dev, int id, bool unique_aux)
++{
++	int ret;
++	unsigned offset;
++	void *p = NULL;
++	const char *s;
++	struct clk *clk;
++
++	if (id >= 0) {
++		offset = 0x4501 + (0x1000 * id);
++		s = p = kasprintf(GFP_KERNEL, "%d", id);
++		if (!s)
++			return ERR_PTR(-ENOMEM);
++	} else {
++		offset = 0x500;
++		s = "_l2";
++	}
++
++	ret = krait_add_div(dev, id, s, offset);
++	if (ret) {
++		clk = ERR_PTR(ret);
++		goto err;
++	}
++
++	ret = krait_add_sec_mux(dev, id, s, offset, unique_aux);
++	if (ret) {
++		clk = ERR_PTR(ret);
++		goto err;
++	}
++
++	clk = krait_add_pri_mux(dev, id, s, offset);
++err:
++	kfree(p);
++	return clk;
++}
++
++static struct clk *krait_of_get(struct of_phandle_args *clkspec, void *data)
++{
++	unsigned int idx = clkspec->args[0];
++	struct clk **clks = data;
++
++	if (idx >= 5) {
++		pr_err("%s: invalid clock index %d\n", __func__, idx);
++		return ERR_PTR(-EINVAL);
++	}
++
++	return clks[idx] ? : ERR_PTR(-ENODEV);
++}
++
++static const struct of_device_id krait_cc_match_table[] = {
++	{ .compatible = "qcom,krait-cc-v1", (void *)1UL },
++	{ .compatible = "qcom,krait-cc-v2" },
++	{}
++};
++MODULE_DEVICE_TABLE(of, krait_cc_match_table);
++
++static int krait_cc_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	const struct of_device_id *id;
++	unsigned long cur_rate, aux_rate;
++	int i, cpu;
++	struct clk *clk;
++	struct clk **clks;
++	struct clk *l2_pri_mux_clk;
++
++	id = of_match_device(krait_cc_match_table, &pdev->dev);
++	if (!id)
++		return -ENODEV;
++
++	/* Rate is 1 because 0 causes problems for __clk_mux_determine_rate */
++	clk = clk_register_fixed_rate(dev, "qsb", NULL, CLK_IS_ROOT, 1);
++	if (IS_ERR(clk))
++		return PTR_ERR(clk);
++
++	if (!id->data) {
++		clk = devm_clk_register(dev, &acpu_aux.hw);
++		if (IS_ERR(clk))
++			return PTR_ERR(clk);
++	}
++
++	/* Krait configurations have at most 4 CPUs and one L2 */
++	clks = devm_kcalloc(dev, 5, sizeof(*clks), GFP_KERNEL);
++	if (!clks)
++		return -ENOMEM;
++
++	for_each_possible_cpu(i) {
++		cpu = cpu_logical_map(i);
++		clk = krait_add_clks(dev, cpu, id->data);
++		if (IS_ERR(clk))
++			return PTR_ERR(clk);
++		clks[cpu] = clk;
++	}
++
++	l2_pri_mux_clk = krait_add_clks(dev, -1, id->data);
++	if (IS_ERR(l2_pri_mux_clk))
++		return PTR_ERR(l2_pri_mux_clk);
++	clks[4] = l2_pri_mux_clk;
++
++	/*
++	 * We don't want the CPU or L2 clocks to be turned off at late init
++	 * if CPUFREQ or HOTPLUG configs are disabled. So, bump up the
++	 * refcount of these clocks. Any cpufreq/hotplug manager can assume
++	 * that the clocks have already been prepared and enabled by the time
++	 * they take over.
++	 */
++	for_each_online_cpu(i) {
++		cpu = cpu_logical_map(i);
++		clk_prepare_enable(l2_pri_mux_clk);
++		WARN(clk_prepare_enable(clks[cpu]),
++			"Unable to turn on CPU%d clock", cpu);
++	}
++
++	/*
++	 * Force reinit of HFPLLs and muxes to overwrite any potential
++	 * incorrect configuration of HFPLLs and muxes by the bootloader.
++	 * While at it, also make sure the cores are running at known rates
++	 * and print the current rate.
++	 *
++	 * The clocks are set to aux clock rate first to make sure the
++	 * secondary mux is not sourcing off of QSB. The rate is then set to
++	 * two different rates to force a HFPLL reinit under all
++	 * circumstances.
++	 */
++	cur_rate = clk_get_rate(l2_pri_mux_clk);
++	aux_rate = 384000000;
++	if (cur_rate == 1) {
++		pr_info("L2 @ QSB rate. Forcing new rate.\n");
++		cur_rate = aux_rate;
++	}
++	clk_set_rate(l2_pri_mux_clk, aux_rate);
++	clk_set_rate(l2_pri_mux_clk, 2);
++	clk_set_rate(l2_pri_mux_clk, cur_rate);
++	pr_info("L2 @ %lu KHz\n", clk_get_rate(l2_pri_mux_clk) / 1000);
++	for_each_possible_cpu(i) {
++		cpu = cpu_logical_map(i);
++		clk = clks[cpu];
++		cur_rate = clk_get_rate(clk);
++		if (cur_rate == 1) {
++			pr_info("CPU%d @ QSB rate. Forcing new rate.\n", i);
++			cur_rate = aux_rate;
++		}
++		clk_set_rate(clk, aux_rate);
++		clk_set_rate(clk, 2);
++		clk_set_rate(clk, cur_rate);
++		pr_info("CPU%d @ %lu KHz\n", i, clk_get_rate(clk) / 1000);
++	}
++
++	of_clk_add_provider(dev->of_node, krait_of_get, clks);
++
++	return 0;
++}
++
++static struct platform_driver krait_cc_driver = {
++	.probe = krait_cc_probe,
++	.driver = {
++		.name = "clock-krait",
++		.of_match_table = krait_cc_match_table,
++		.owner = THIS_MODULE,
++	},
++};
++module_platform_driver(krait_cc_driver);
++
++MODULE_DESCRIPTION("Krait CPU Clock Driver");
++MODULE_LICENSE("GPL v2");
+-- 
+1.7.10.4
+