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OpenCloudOS-Kernel/drivers/clk/sunxi/clk-a10-ve.c

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clk: sunxi: Add VE (Video Engine) module clock driver for sun[457]i The video engine has its own special module clock, consisting of a clock gate, configurable dividers, and a reset control. On later (sun[68]i) families, the reset control is moved out of this piece of hardware and grouped with reset controls of other peripherals. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Tested-by: Jens Kuske <jenskuske@gmail.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-12-05 21:16:43 +08:00
/*
* Copyright 2015 Chen-Yu Tsai
*
* Chen-Yu Tsai <wens@csie.org>
*
* 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>
clk: Remove io.h from clk-provider.h Now that we've gotten rid of clk_readl() we can remove io.h from the clk-provider header and push out the io.h include to any code that isn't already including the io.h header but using things like readl/writel, etc. Found with this grep: git grep -l clk-provider.h | grep '.c$' | xargs git grep -L 'linux/io.h' | \ xargs git grep -l \ -e '\<__iowrite32_copy\>' --or \ -e '\<__ioread32_copy\>' --or \ -e '\<__iowrite64_copy\>' --or \ -e '\<ioremap_page_range\>' --or \ -e '\<ioremap_huge_init\>' --or \ -e '\<arch_ioremap_pud_supported\>' --or \ -e '\<arch_ioremap_pmd_supported\>' --or \ -e '\<devm_ioport_map\>' --or \ -e '\<devm_ioport_unmap\>' --or \ -e '\<IOMEM_ERR_PTR\>' --or \ -e '\<devm_ioremap\>' --or \ -e '\<devm_ioremap_nocache\>' --or \ -e '\<devm_ioremap_wc\>' --or \ -e '\<devm_iounmap\>' --or \ -e '\<devm_ioremap_release\>' --or \ -e '\<devm_memremap\>' --or \ -e '\<devm_memunmap\>' --or \ -e '\<__devm_memremap_pages\>' --or \ -e '\<pci_remap_cfgspace\>' --or \ -e '\<arch_has_dev_port\>' --or \ -e '\<arch_phys_wc_add\>' --or \ -e '\<arch_phys_wc_del\>' --or \ -e '\<memremap\>' --or \ -e '\<memunmap\>' --or \ -e '\<arch_io_reserve_memtype_wc\>' --or \ -e '\<arch_io_free_memtype_wc\>' --or \ -e '\<__io_aw\>' --or \ -e '\<__io_pbw\>' --or \ -e '\<__io_paw\>' --or \ -e '\<__io_pbr\>' --or \ -e '\<__io_par\>' --or \ -e '\<__raw_readb\>' --or \ -e '\<__raw_readw\>' --or \ -e '\<__raw_readl\>' --or \ -e '\<__raw_readq\>' --or \ -e '\<__raw_writeb\>' --or \ -e '\<__raw_writew\>' --or \ -e '\<__raw_writel\>' --or \ -e '\<__raw_writeq\>' --or \ -e '\<readb\>' --or \ -e '\<readw\>' --or \ -e '\<readl\>' --or \ -e '\<readq\>' --or \ -e '\<writeb\>' --or \ -e '\<writew\>' --or \ -e '\<writel\>' --or \ -e '\<writeq\>' --or \ -e '\<readb_relaxed\>' --or \ -e '\<readw_relaxed\>' --or \ -e '\<readl_relaxed\>' --or \ -e '\<readq_relaxed\>' --or \ -e '\<writeb_relaxed\>' --or \ -e '\<writew_relaxed\>' --or \ -e '\<writel_relaxed\>' --or \ -e '\<writeq_relaxed\>' --or \ -e '\<readsb\>' --or \ -e '\<readsw\>' --or \ -e '\<readsl\>' --or \ -e '\<readsq\>' --or \ -e '\<writesb\>' --or \ -e '\<writesw\>' --or \ -e '\<writesl\>' --or \ -e '\<writesq\>' --or \ -e '\<inb\>' --or \ -e '\<inw\>' --or \ -e '\<inl\>' --or \ -e '\<outb\>' --or \ -e '\<outw\>' --or \ -e '\<outl\>' --or \ -e '\<inb_p\>' --or \ -e '\<inw_p\>' --or \ -e '\<inl_p\>' --or \ -e '\<outb_p\>' --or \ -e '\<outw_p\>' --or \ -e '\<outl_p\>' --or \ -e '\<insb\>' --or \ -e '\<insw\>' --or \ -e '\<insl\>' --or \ -e '\<outsb\>' --or \ -e '\<outsw\>' --or \ -e '\<outsl\>' --or \ -e '\<insb_p\>' --or \ -e '\<insw_p\>' --or \ -e '\<insl_p\>' --or \ -e '\<outsb_p\>' --or \ -e '\<outsw_p\>' --or \ -e '\<outsl_p\>' --or \ -e '\<ioread8\>' --or \ -e '\<ioread16\>' --or \ -e '\<ioread32\>' --or \ -e '\<ioread64\>' --or \ -e '\<iowrite8\>' --or \ -e '\<iowrite16\>' --or \ -e '\<iowrite32\>' --or \ -e '\<iowrite64\>' --or \ -e '\<ioread16be\>' --or \ -e '\<ioread32be\>' --or \ -e '\<ioread64be\>' --or \ -e '\<iowrite16be\>' --or \ -e '\<iowrite32be\>' --or \ -e '\<iowrite64be\>' --or \ -e '\<ioread8_rep\>' --or \ -e '\<ioread16_rep\>' --or \ -e '\<ioread32_rep\>' --or \ -e '\<ioread64_rep\>' --or \ -e '\<iowrite8_rep\>' --or \ -e '\<iowrite16_rep\>' --or \ -e '\<iowrite32_rep\>' --or \ -e '\<iowrite64_rep\>' --or \ -e '\<__io_virt\>' --or \ -e '\<pci_iounmap\>' --or \ -e '\<virt_to_phys\>' --or \ -e '\<phys_to_virt\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap\>' --or \ -e '\<__ioremap\>' --or \ -e '\<iounmap\>' --or \ -e '\<ioremap\>' --or \ -e '\<ioremap_nocache\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wt\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<xlate_dev_kmem_ptr\>' --or \ -e '\<xlate_dev_mem_ptr\>' --or \ -e '\<unxlate_dev_mem_ptr\>' --or \ -e '\<virt_to_bus\>' --or \ -e '\<bus_to_virt\>' --or \ -e '\<memset_io\>' --or \ -e '\<memcpy_fromio\>' --or \ -e '\<memcpy_toio\>' I also reordered a couple includes when they weren't alphabetical and removed clk.h from kona, replacing it with clk-provider.h because that driver doesn't use clk consumer APIs. Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Acked-by: Tero Kristo <t-kristo@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Cc: Chris Zankel <chris@zankel.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: John Crispin <john@phrozen.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-04-19 06:20:22 +08:00
#include <linux/io.h>
clk: sunxi: Add VE (Video Engine) module clock driver for sun[457]i The video engine has its own special module clock, consisting of a clock gate, configurable dividers, and a reset control. On later (sun[68]i) families, the reset control is moved out of this piece of hardware and grouped with reset controls of other peripherals. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Tested-by: Jens Kuske <jenskuske@gmail.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-12-05 21:16:43 +08:00
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/reset-controller.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
static DEFINE_SPINLOCK(ve_lock);
#define SUN4I_VE_ENABLE 31
#define SUN4I_VE_DIVIDER_SHIFT 16
#define SUN4I_VE_DIVIDER_WIDTH 3
#define SUN4I_VE_RESET 0
/**
* sunxi_ve_reset... - reset bit in ve clk registers handling
*/
struct ve_reset_data {
void __iomem *reg;
spinlock_t *lock;
struct reset_controller_dev rcdev;
};
static int sunxi_ve_reset_assert(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct ve_reset_data *data = container_of(rcdev,
struct ve_reset_data,
rcdev);
unsigned long flags;
u32 reg;
spin_lock_irqsave(data->lock, flags);
reg = readl(data->reg);
writel(reg & ~BIT(SUN4I_VE_RESET), data->reg);
spin_unlock_irqrestore(data->lock, flags);
return 0;
}
static int sunxi_ve_reset_deassert(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct ve_reset_data *data = container_of(rcdev,
struct ve_reset_data,
rcdev);
unsigned long flags;
u32 reg;
spin_lock_irqsave(data->lock, flags);
reg = readl(data->reg);
writel(reg | BIT(SUN4I_VE_RESET), data->reg);
spin_unlock_irqrestore(data->lock, flags);
return 0;
}
static int sunxi_ve_of_xlate(struct reset_controller_dev *rcdev,
const struct of_phandle_args *reset_spec)
{
if (WARN_ON(reset_spec->args_count != 0))
return -EINVAL;
return 0;
}
clk: sunxi: Make reset_control_ops const The sunxi_ve_reset_ops, sun9i_mmc_reset_ops, and sunxi_usb_reset_ops structures are never modified. Make them const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-02-25 17:45:10 +08:00
static const struct reset_control_ops sunxi_ve_reset_ops = {
clk: sunxi: Add VE (Video Engine) module clock driver for sun[457]i The video engine has its own special module clock, consisting of a clock gate, configurable dividers, and a reset control. On later (sun[68]i) families, the reset control is moved out of this piece of hardware and grouped with reset controls of other peripherals. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Tested-by: Jens Kuske <jenskuske@gmail.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-12-05 21:16:43 +08:00
.assert = sunxi_ve_reset_assert,
.deassert = sunxi_ve_reset_deassert,
};
static void __init sun4i_ve_clk_setup(struct device_node *node)
{
struct clk *clk;
struct clk_divider *div;
struct clk_gate *gate;
struct ve_reset_data *reset_data;
const char *parent;
const char *clk_name = node->name;
void __iomem *reg;
int err;
reg = of_io_request_and_map(node, 0, of_node_full_name(node));
if (IS_ERR(reg))
return;
div = kzalloc(sizeof(*div), GFP_KERNEL);
if (!div)
goto err_unmap;
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate)
goto err_free_div;
of_property_read_string(node, "clock-output-names", &clk_name);
parent = of_clk_get_parent_name(node, 0);
gate->reg = reg;
gate->bit_idx = SUN4I_VE_ENABLE;
gate->lock = &ve_lock;
div->reg = reg;
div->shift = SUN4I_VE_DIVIDER_SHIFT;
div->width = SUN4I_VE_DIVIDER_WIDTH;
div->lock = &ve_lock;
clk = clk_register_composite(NULL, clk_name, &parent, 1,
NULL, NULL,
&div->hw, &clk_divider_ops,
&gate->hw, &clk_gate_ops,
CLK_SET_RATE_PARENT);
if (IS_ERR(clk))
goto err_free_gate;
err = of_clk_add_provider(node, of_clk_src_simple_get, clk);
if (err)
goto err_unregister_clk;
reset_data = kzalloc(sizeof(*reset_data), GFP_KERNEL);
if (!reset_data)
goto err_del_provider;
reset_data->reg = reg;
reset_data->lock = &ve_lock;
reset_data->rcdev.nr_resets = 1;
reset_data->rcdev.ops = &sunxi_ve_reset_ops;
reset_data->rcdev.of_node = node;
reset_data->rcdev.of_xlate = sunxi_ve_of_xlate;
reset_data->rcdev.of_reset_n_cells = 0;
err = reset_controller_register(&reset_data->rcdev);
if (err)
goto err_free_reset;
return;
err_free_reset:
kfree(reset_data);
err_del_provider:
of_clk_del_provider(node);
err_unregister_clk:
clk_unregister(clk);
err_free_gate:
kfree(gate);
err_free_div:
kfree(div);
err_unmap:
iounmap(reg);
}
CLK_OF_DECLARE(sun4i_ve, "allwinner,sun4i-a10-ve-clk",
sun4i_ve_clk_setup);