Commit 3495e295 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Stephen Boyd

clk: actions: Add common clock driver support

Add support for Actions Semi common clock driver with generic structures
and interface functions.
Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 06d42212
......@@ -238,6 +238,7 @@ config COMMON_CLK_VC5
This driver supports the IDT VersaClock 5 and VersaClock 6
programmable clock generators.
source "drivers/clk/actions/Kconfig"
source "drivers/clk/bcm/Kconfig"
source "drivers/clk/hisilicon/Kconfig"
source "drivers/clk/imgtec/Kconfig"
......
......@@ -56,6 +56,7 @@ obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o
obj-$(CONFIG_COMMON_CLK_XGENE) += clk-xgene.o
# please keep this section sorted lexicographically by directory path name
obj-y += actions/
obj-$(CONFIG_COMMON_CLK_AT91) += at91/
obj-$(CONFIG_ARCH_ARTPEC) += axis/
obj-$(CONFIG_ARC_PLAT_AXS10X) += axs10x/
......
config CLK_ACTIONS
bool "Clock driver for Actions Semi SoCs"
depends on ARCH_ACTIONS || COMPILE_TEST
default ARCH_ACTIONS
obj-$(CONFIG_CLK_ACTIONS) += clk-owl.o
clk-owl-y += owl-common.o
// SPDX-License-Identifier: GPL-2.0+
//
// OWL common clock driver
//
// Copyright (c) 2014 Actions Semi Inc.
// Author: David Liu <liuwei@actions-semi.com>
//
// Copyright (c) 2018 Linaro Ltd.
// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "owl-common.h"
static const struct regmap_config owl_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = 0x00cc,
.fast_io = true,
};
static void owl_clk_set_regmap(const struct owl_clk_desc *desc,
struct regmap *regmap)
{
int i;
struct owl_clk_common *clks;
for (i = 0; i < desc->num_clks; i++) {
clks = desc->clks[i];
if (!clks)
continue;
clks->regmap = regmap;
}
}
int owl_clk_regmap_init(struct platform_device *pdev,
const struct owl_clk_desc *desc)
{
void __iomem *base;
struct regmap *regmap;
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
regmap = devm_regmap_init_mmio(&pdev->dev, base, &owl_regmap_config);
if (IS_ERR(regmap)) {
pr_err("failed to init regmap\n");
return PTR_ERR(regmap);
}
owl_clk_set_regmap(desc, regmap);
return 0;
}
int owl_clk_probe(struct device *dev, struct clk_hw_onecell_data *hw_clks)
{
int i, ret;
struct clk_hw *hw;
for (i = 0; i < hw_clks->num; i++) {
hw = hw_clks->hws[i];
if (IS_ERR_OR_NULL(hw))
continue;
ret = devm_clk_hw_register(dev, hw);
if (ret) {
dev_err(dev, "Couldn't register clock %d - %s\n",
i, hw->init->name);
return ret;
}
}
ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, hw_clks);
if (ret)
dev_err(dev, "Failed to add clock provider\n");
return ret;
}
// SPDX-License-Identifier: GPL-2.0+
//
// OWL common clock driver
//
// Copyright (c) 2014 Actions Semi Inc.
// Author: David Liu <liuwei@actions-semi.com>
//
// Copyright (c) 2018 Linaro Ltd.
// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
#ifndef _OWL_COMMON_H_
#define _OWL_COMMON_H_
#include <linux/clk-provider.h>
#include <linux/of_platform.h>
#include <linux/regmap.h>
struct device_node;
struct owl_clk_common {
struct regmap *regmap;
struct clk_hw hw;
};
struct owl_clk_desc {
struct owl_clk_common **clks;
unsigned long num_clks;
struct clk_hw_onecell_data *hw_clks;
};
static inline struct owl_clk_common *
hw_to_owl_clk_common(const struct clk_hw *hw)
{
return container_of(hw, struct owl_clk_common, hw);
}
int owl_clk_regmap_init(struct platform_device *pdev,
const struct owl_clk_desc *desc);
int owl_clk_probe(struct device *dev, struct clk_hw_onecell_data *hw_clks);
#endif /* _OWL_COMMON_H_ */
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment