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Commit 1d80c142 authored by Maxime Ripard's avatar Maxime Ripard Committed by Michael Turquette
Browse files

clk: sunxi-ng: Add common infrastructure 



Start our new clock infrastructure by adding the registration code, common
structure and common code.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarMichael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-3-maxime.ripard@free-electrons.com
parent c0692d68

drivers/clk/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -212,6 +212,7 @@ source "drivers/clk/mvebu/Kconfig" 
source "drivers/clk/qcom/Kconfig"

source "drivers/clk/renesas/Kconfig"

source "drivers/clk/samsung/Kconfig"

source "drivers/clk/sunxi-ng/Kconfig"

source "drivers/clk/tegra/Kconfig"

source "drivers/clk/ti/Kconfig"

drivers/clk/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ obj-$(CONFIG_ARCH_SOCFPGA) += socfpga/ 
obj-$(CONFIG_PLAT_SPEAR)		+= spear/

obj-$(CONFIG_ARCH_STI)			+= st/

obj-$(CONFIG_ARCH_SUNXI)		+= sunxi/

obj-$(CONFIG_ARCH_SUNXI)		+= sunxi-ng/

obj-$(CONFIG_ARCH_TEGRA)		+= tegra/

obj-y					+= ti/

obj-$(CONFIG_ARCH_U8500)		+= ux500/

drivers/clk/sunxi-ng/Kconfig

0 → 100644
+3 −0
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config SUNXI_CCU

	bool "Clock support for Allwinner SoCs"

	default ARCH_SUNXI

drivers/clk/sunxi-ng/Makefile

0 → 100644
+3 −0
Original line number Diff line number Diff line 
# Common objects

obj-$(CONFIG_SUNXI_CCU)		+= ccu_common.o

obj-$(CONFIG_SUNXI_CCU)		+= ccu_reset.o

drivers/clk/sunxi-ng/ccu_common.c

0 → 100644
+90 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2016 Maxime Ripard

 *

 * Maxime Ripard <maxime.ripard@free-electrons.com>

 *

 * 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/iopoll.h>

#include <linux/slab.h>



#include "ccu_common.h"

#include "ccu_reset.h"



static DEFINE_SPINLOCK(ccu_lock);



void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock)

{

	u32 reg;



	if (!lock)

		return;



	WARN_ON(readl_relaxed_poll_timeout(common->base + common->reg, reg,

					   !(reg & lock), 100, 70000));

}



int sunxi_ccu_probe(struct device_node *node, void __iomem *reg,

		    const struct sunxi_ccu_desc *desc)

{

	struct ccu_reset *reset;

	int i, ret;



	for (i = 0; i < desc->num_ccu_clks; i++) {

		struct ccu_common *cclk = desc->ccu_clks[i];



		if (!cclk)

			continue;



		cclk->base = reg;

		cclk->lock = &ccu_lock;

	}



	for (i = 0; i < desc->hw_clks->num ; i++) {

		struct clk_hw *hw = desc->hw_clks->hws[i];



		if (!hw)

			continue;



		ret = clk_hw_register(NULL, hw);

		if (ret) {

			pr_err("Couldn't register clock %s\n",

			       clk_hw_get_name(hw));

			goto err_clk_unreg;

		}

	}



	ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get,

				     desc->hw_clks);

	if (ret)

		goto err_clk_unreg;



	reset = kzalloc(sizeof(*reset), GFP_KERNEL);

	reset->rcdev.of_node = node;

	reset->rcdev.ops = &ccu_reset_ops;

	reset->rcdev.owner = THIS_MODULE;

	reset->rcdev.nr_resets = desc->num_resets;

	reset->base = reg;

	reset->lock = &ccu_lock;

	reset->reset_map = desc->resets;



	ret = reset_controller_register(&reset->rcdev);

	if (ret)

		goto err_of_clk_unreg;



	return 0;



err_of_clk_unreg:

err_clk_unreg:

	return ret;

}