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path: root/drivers/clk/versatile/clk-impd1.c
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Diffstat (limited to 'drivers/clk/versatile/clk-impd1.c')
-rw-r--r--drivers/clk/versatile/clk-impd1.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/clk/versatile/clk-impd1.c b/drivers/clk/versatile/clk-impd1.c
index 1991f15a5db9..b05da8516d4c 100644
--- a/drivers/clk/versatile/clk-impd1.c
+++ b/drivers/clk/versatile/clk-impd1.c
@@ -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");