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clk: lochnagar: Use new parent_data approach to register clock parents 

Switch over to the more modern style of registering parents and simplify
the code in the process.

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Charles Keepax 2019-06-25 14:10:53 +01:00 committed by Stephen Boyd
parent a188339ca5
commit 055ca54777
1 changed files with 86 additions and 119 deletions
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205
drivers/clk/clk-lochnagar.c
View File

@ -16,7 +16,6 @@
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/lochnagar.h>
#include <linux/mfd/lochnagar1_regs.h>
#include <linux/mfd/lochnagar2_regs.h>
@ -40,48 +39,46 @@ struct lochnagar_clk {
struct lochnagar_clk_priv {
struct device *dev;
struct regmap *regmap;
enum lochnagar_type type;
const char **parents;
unsigned int nparents;
struct lochnagar_clk lclks[LOCHNAGAR_NUM_CLOCKS];
};
static const char * const lochnagar1_clk_parents[] = {
"ln-none",
"ln-spdif-mclk",
"ln-psia1-mclk",
"ln-psia2-mclk",
"ln-cdc-clkout",
"ln-dsp-clkout",
"ln-pmic-32k",
"ln-gf-mclk1",
"ln-gf-mclk3",
"ln-gf-mclk2",
"ln-gf-mclk4",
#define LN_PARENT(NAME) { .name = NAME, .fw_name = NAME }
static const struct clk_parent_data lochnagar1_clk_parents[] = {
LN_PARENT("ln-none"),
LN_PARENT("ln-spdif-mclk"),
LN_PARENT("ln-psia1-mclk"),
LN_PARENT("ln-psia2-mclk"),
LN_PARENT("ln-cdc-clkout"),
LN_PARENT("ln-dsp-clkout"),
LN_PARENT("ln-pmic-32k"),
LN_PARENT("ln-gf-mclk1"),
LN_PARENT("ln-gf-mclk3"),
LN_PARENT("ln-gf-mclk2"),
LN_PARENT("ln-gf-mclk4"),
};
static const char * const lochnagar2_clk_parents[] = {
"ln-none",
"ln-cdc-clkout",
"ln-dsp-clkout",
"ln-pmic-32k",
"ln-spdif-mclk",
"ln-clk-12m",
"ln-clk-11m",
"ln-clk-24m",
"ln-clk-22m",
"ln-clk-8m",
"ln-usb-clk-24m",
"ln-gf-mclk1",
"ln-gf-mclk3",
"ln-gf-mclk2",
"ln-psia1-mclk",
"ln-psia2-mclk",
"ln-spdif-clkout",
"ln-adat-mclk",
"ln-usb-clk-12m",
static const struct clk_parent_data lochnagar2_clk_parents[] = {
LN_PARENT("ln-none"),
LN_PARENT("ln-cdc-clkout"),
LN_PARENT("ln-dsp-clkout"),
LN_PARENT("ln-pmic-32k"),
LN_PARENT("ln-spdif-mclk"),
LN_PARENT("ln-clk-12m"),
LN_PARENT("ln-clk-11m"),
LN_PARENT("ln-clk-24m"),
LN_PARENT("ln-clk-22m"),
LN_PARENT("ln-clk-8m"),
LN_PARENT("ln-usb-clk-24m"),
LN_PARENT("ln-gf-mclk1"),
LN_PARENT("ln-gf-mclk3"),
LN_PARENT("ln-gf-mclk2"),
LN_PARENT("ln-psia1-mclk"),
LN_PARENT("ln-psia2-mclk"),
LN_PARENT("ln-spdif-clkout"),
LN_PARENT("ln-adat-mclk"),
LN_PARENT("ln-usb-clk-12m"),
};
#define LN1_CLK(ID, NAME, REG) \
@ -122,6 +119,24 @@ static const struct lochnagar_clk lochnagar2_clks[LOCHNAGAR_NUM_CLOCKS] = {
LN2_CLK(SOUNDCARD_MCLK, "ln-soundcard-mclk"),
};
struct lochnagar_config {
const struct clk_parent_data *parents;
int nparents;
const struct lochnagar_clk *clks;
};
static const struct lochnagar_config lochnagar1_conf = {
.parents = lochnagar1_clk_parents,
.nparents = ARRAY_SIZE(lochnagar1_clk_parents),
.clks = lochnagar1_clks,
};
static const struct lochnagar_config lochnagar2_conf = {
.parents = lochnagar2_clk_parents,
.nparents = ARRAY_SIZE(lochnagar2_clk_parents),
.clks = lochnagar2_clks,
};
static inline struct lochnagar_clk *lochnagar_hw_to_lclk(struct clk_hw *hw)
{
return container_of(hw, struct lochnagar_clk, hw);
@ -183,7 +198,7 @@ static u8 lochnagar_clk_get_parent(struct clk_hw *hw)
if (ret < 0) {
dev_dbg(priv->dev, "Failed to read parent of %s: %d\n",
lclk->name, ret);
return priv->nparents;
return hw->init->num_parents;
}
val &= lclk->src_mask;
@ -198,46 +213,6 @@ static const struct clk_ops lochnagar_clk_ops = {
.get_parent = lochnagar_clk_get_parent,
};
static int lochnagar_init_parents(struct lochnagar_clk_priv *priv)
{
struct device_node *np = priv->dev->of_node;
int i, j;
switch (priv->type) {
case LOCHNAGAR1:
memcpy(priv->lclks, lochnagar1_clks, sizeof(lochnagar1_clks));
priv->nparents = ARRAY_SIZE(lochnagar1_clk_parents);
priv->parents = devm_kmemdup(priv->dev, lochnagar1_clk_parents,
sizeof(lochnagar1_clk_parents),
GFP_KERNEL);
break;
case LOCHNAGAR2:
memcpy(priv->lclks, lochnagar2_clks, sizeof(lochnagar2_clks));
priv->nparents = ARRAY_SIZE(lochnagar2_clk_parents);
priv->parents = devm_kmemdup(priv->dev, lochnagar2_clk_parents,
sizeof(lochnagar2_clk_parents),
GFP_KERNEL);
break;
default:
dev_err(priv->dev, "Unknown Lochnagar type: %d\n", priv->type);
return -EINVAL;
}
if (!priv->parents)
return -ENOMEM;
for (i = 0; i < priv->nparents; i++) {
j = of_property_match_string(np, "clock-names",
priv->parents[i]);
if (j >= 0)
priv->parents[i] = of_clk_get_parent_name(np, j);
}
return 0;
}
static struct clk_hw *
lochnagar_of_clk_hw_get(struct of_phandle_args *clkspec, void *data)
{
@ -252,16 +227,42 @@ lochnagar_of_clk_hw_get(struct of_phandle_args *clkspec, void *data)
return &priv->lclks[idx].hw;
}
static int lochnagar_init_clks(struct lochnagar_clk_priv *priv)
static const struct of_device_id lochnagar_of_match[] = {
{ .compatible = "cirrus,lochnagar1-clk", .data = &lochnagar1_conf },
{ .compatible = "cirrus,lochnagar2-clk", .data = &lochnagar2_conf },
{}
};
MODULE_DEVICE_TABLE(of, lochnagar_of_match);
static int lochnagar_clk_probe(struct platform_device *pdev)
{
struct clk_init_data clk_init = {
.ops = &lochnagar_clk_ops,
.parent_names = priv->parents,
.num_parents = priv->nparents,
};
struct device *dev = &pdev->dev;
struct lochnagar_clk_priv *priv;
const struct of_device_id *of_id;
struct lochnagar_clk *lclk;
struct lochnagar_config *conf;
int ret, i;
of_id = of_match_device(lochnagar_of_match, dev);
if (!of_id)
return -EINVAL;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = dev;
priv->regmap = dev_get_regmap(dev->parent, NULL);
conf = (struct lochnagar_config *)of_id->data;
memcpy(priv->lclks, conf->clks, sizeof(priv->lclks));
clk_init.parent_data = conf->parents;
clk_init.num_parents = conf->nparents;
for (i = 0; i < ARRAY_SIZE(priv->lclks); i++) {
lclk = &priv->lclks[i];
@ -273,55 +274,21 @@ static int lochnagar_init_clks(struct lochnagar_clk_priv *priv)
lclk->priv = priv;
lclk->hw.init = &clk_init;
ret = devm_clk_hw_register(priv->dev, &lclk->hw);
ret = devm_clk_hw_register(dev, &lclk->hw);
if (ret) {
dev_err(priv->dev, "Failed to register %s: %d\n",
dev_err(dev, "Failed to register %s: %d\n",
lclk->name, ret);
return ret;
}
}
ret = devm_of_clk_add_hw_provider(priv->dev, lochnagar_of_clk_hw_get,
priv);
ret = devm_of_clk_add_hw_provider(dev, lochnagar_of_clk_hw_get, priv);
if (ret < 0)
dev_err(priv->dev, "Failed to register provider: %d\n", ret);
dev_err(dev, "Failed to register provider: %d\n", ret);
return ret;
}
static const struct of_device_id lochnagar_of_match[] = {
{ .compatible = "cirrus,lochnagar1-clk", .data = (void *)LOCHNAGAR1 },
{ .compatible = "cirrus,lochnagar2-clk", .data = (void *)LOCHNAGAR2 },
{}
};
MODULE_DEVICE_TABLE(of, lochnagar_of_match);
static int lochnagar_clk_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct lochnagar_clk_priv *priv;
const struct of_device_id *of_id;
int ret;
of_id = of_match_device(lochnagar_of_match, dev);
if (!of_id)
return -EINVAL;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = dev;
priv->regmap = dev_get_regmap(dev->parent, NULL);
priv->type = (enum lochnagar_type)of_id->data;
ret = lochnagar_init_parents(priv);
if (ret)
return ret;
return lochnagar_init_clks(priv);
}
static struct platform_driver lochnagar_clk_driver = {
.driver = {
.name = "lochnagar-clk",