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clk: versatile: Add device tree probing for IM-PD1 clocks

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As we want to move these clocks over to probe from the device
tree we add a device tree probing path.

The old platform data path will be deleted once we have the
device tree overall code in place.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lkml.kernel.org/r/20200219103326.81120-3-linus.walleij@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Linus Walleij 2020-02-19 11:33:26 +01:00 committed by Stephen Boyd
parent eb9d6428a7
commit 84655b762a
2 changed files with 80 additions and 0 deletions
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1
drivers/clk/versatile/clk-icst.h
View File

@ -11,6 +11,7 @@ enum icst_control_type {
ICST_INTEGRATOR_AP_PCI, /* Odd bit pattern storage */
ICST_INTEGRATOR_CP_CM_CORE, /* Only 8 bits of VDW and 3 bits of OD */
ICST_INTEGRATOR_CP_CM_MEM, /* Only 8 bits of VDW and 3 bits of OD */
ICST_INTEGRATOR_IM_PD1, /* Like the Versatile, all control bits */
};
/**

79
drivers/clk/versatile/clk-impd1.c
View File

@ -7,7 +7,11 @@
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/platform_data/clk-integrator.h>
#include <linux/module.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "icst.h"
#include "clk-icst.h"
@ -175,3 +179,78 @@ void integrator_impd1_clk_exit(unsigned int id)
kfree(imc->pclkname);
}
EXPORT_SYMBOL_GPL(integrator_impd1_clk_exit);
static int integrator_impd1_clk_spawn(struct device *dev,
struct device_node *parent,
struct device_node *np)
{
struct regmap *map;
struct clk *clk = ERR_PTR(-EINVAL);
const char *name = np->name;
const char *parent_name;
const struct clk_icst_desc *desc;
int ret;
map = syscon_node_to_regmap(parent);
if (IS_ERR(map)) {
pr_err("no regmap for syscon IM-PD1 ICST clock parent\n");
return PTR_ERR(map);
}
if (of_device_is_compatible(np, "arm,impd1-vco1")) {
desc = &impd1_icst1_desc;
} else if (of_device_is_compatible(np, "arm,impd1-vco2")) {
desc = &impd1_icst2_desc;
} else {
dev_err(dev, "not a clock node %s\n", name);
return -ENODEV;
}
parent_name = of_clk_get_parent_name(np, 0);
clk = icst_clk_setup(NULL, desc, name, parent_name, map,
ICST_INTEGRATOR_IM_PD1);
if (!IS_ERR(clk)) {
of_clk_add_provider(np, of_clk_src_simple_get, clk);
ret = 0;
} else {
dev_err(dev, "error setting up IM-PD1 ICST clock\n");
ret = PTR_ERR(clk);
}
return ret;
}
static int integrator_impd1_clk_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct device_node *child;
int ret = 0;
for_each_available_child_of_node(np, child) {
ret = integrator_impd1_clk_spawn(dev, np, child);
if (ret)
break;
}
return ret;
}
static const struct of_device_id impd1_syscon_match[] = {
{ .compatible = "arm,im-pd1-syscon", },
{}
};
MODULE_DEVICE_TABLE(of, impd1_syscon_match);
static struct platform_driver impd1_clk_driver = {
.driver = {
.name = "impd1-clk",
.of_match_table = impd1_syscon_match,
},
.probe = integrator_impd1_clk_probe,
};
builtin_platform_driver(impd1_clk_driver);
MODULE_AUTHOR("Linus Walleij <linusw@kernel.org>");
MODULE_DESCRIPTION("Arm IM-PD1 module clock driver");
MODULE_LICENSE("GPL v2");