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path: root/drivers/clk/mediatek/clk-mtk.c
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-rw-r--r--drivers/clk/mediatek/clk-mtk.c127
1 files changed, 114 insertions, 13 deletions
diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index d31f01d0b..fa2c1b1c7 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -11,12 +11,15 @@
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include "clk-mtk.h"
#include "clk-gate.h"
+#include "clk-mux.h"
static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,
unsigned int clk_num)
@@ -197,8 +200,8 @@ void mtk_clk_unregister_factors(const struct mtk_fixed_factor *clks, int num,
}
EXPORT_SYMBOL_GPL(mtk_clk_unregister_factors);
-static struct clk_hw *mtk_clk_register_composite(const struct mtk_composite *mc,
- void __iomem *base, spinlock_t *lock)
+static struct clk_hw *mtk_clk_register_composite(struct device *dev,
+ const struct mtk_composite *mc, void __iomem *base, spinlock_t *lock)
{
struct clk_hw *hw;
struct clk_mux *mux = NULL;
@@ -264,7 +267,7 @@ static struct clk_hw *mtk_clk_register_composite(const struct mtk_composite *mc,
div_ops = &clk_divider_ops;
}
- hw = clk_hw_register_composite(NULL, mc->name, parent_names, num_parents,
+ hw = clk_hw_register_composite(dev, mc->name, parent_names, num_parents,
mux_hw, mux_ops,
div_hw, div_ops,
gate_hw, gate_ops,
@@ -308,7 +311,8 @@ static void mtk_clk_unregister_composite(struct clk_hw *hw)
kfree(mux);
}
-int mtk_clk_register_composites(const struct mtk_composite *mcs, int num,
+int mtk_clk_register_composites(struct device *dev,
+ const struct mtk_composite *mcs, int num,
void __iomem *base, spinlock_t *lock,
struct clk_hw_onecell_data *clk_data)
{
@@ -327,7 +331,7 @@ int mtk_clk_register_composites(const struct mtk_composite *mcs, int num,
continue;
}
- hw = mtk_clk_register_composite(mc, base, lock);
+ hw = mtk_clk_register_composite(dev, mc, base, lock);
if (IS_ERR(hw)) {
pr_err("Failed to register clk %s: %pe\n", mc->name,
@@ -449,20 +453,81 @@ int mtk_clk_simple_probe(struct platform_device *pdev)
const struct mtk_clk_desc *mcd;
struct clk_hw_onecell_data *clk_data;
struct device_node *node = pdev->dev.of_node;
- int r;
+ void __iomem *base;
+ int num_clks, r;
mcd = of_device_get_match_data(&pdev->dev);
if (!mcd)
return -EINVAL;
- clk_data = mtk_alloc_clk_data(mcd->num_clks);
+ /* Composite clocks needs us to pass iomem pointer */
+ if (mcd->composite_clks) {
+ if (!mcd->shared_io)
+ base = devm_platform_ioremap_resource(pdev, 0);
+ else
+ base = of_iomap(node, 0);
+
+ if (IS_ERR_OR_NULL(base))
+ return IS_ERR(base) ? PTR_ERR(base) : -ENOMEM;
+ }
+
+
+ devm_pm_runtime_enable(&pdev->dev);
+ /*
+ * Do a pm_runtime_resume_and_get() to workaround a possible
+ * deadlock between clk_register() and the genpd framework.
+ */
+ r = pm_runtime_resume_and_get(&pdev->dev);
+ if (r)
+ return r;
+
+ /* Calculate how many clk_hw_onecell_data entries to allocate */
+ num_clks = mcd->num_clks + mcd->num_composite_clks;
+ num_clks += mcd->num_fixed_clks + mcd->num_factor_clks;
+ num_clks += mcd->num_mux_clks;
+
+ clk_data = mtk_alloc_clk_data(num_clks);
if (!clk_data)
return -ENOMEM;
- r = mtk_clk_register_gates_with_dev(node, mcd->clks, mcd->num_clks,
- clk_data, &pdev->dev);
- if (r)
- goto free_data;
+ if (mcd->fixed_clks) {
+ r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
+ mcd->num_fixed_clks, clk_data);
+ if (r)
+ goto free_data;
+ }
+
+ if (mcd->factor_clks) {
+ r = mtk_clk_register_factors(mcd->factor_clks,
+ mcd->num_factor_clks, clk_data);
+ if (r)
+ goto unregister_fixed_clks;
+ }
+
+ if (mcd->mux_clks) {
+ r = mtk_clk_register_muxes(&pdev->dev, mcd->mux_clks,
+ mcd->num_mux_clks, node,
+ mcd->clk_lock, clk_data);
+ if (r)
+ goto unregister_factors;
+ };
+
+ if (mcd->composite_clks) {
+ /* We don't check composite_lock because it's optional */
+ r = mtk_clk_register_composites(&pdev->dev,
+ mcd->composite_clks,
+ mcd->num_composite_clks,
+ base, mcd->clk_lock, clk_data);
+ if (r)
+ goto unregister_muxes;
+ }
+
+ if (mcd->clks) {
+ r = mtk_clk_register_gates(&pdev->dev, node, mcd->clks,
+ mcd->num_clks, clk_data);
+ if (r)
+ goto unregister_composites;
+ }
r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
if (r)
@@ -477,12 +542,35 @@ int mtk_clk_simple_probe(struct platform_device *pdev)
goto unregister_clks;
}
+ pm_runtime_put(&pdev->dev);
+
return r;
unregister_clks:
- mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+ if (mcd->clks)
+ mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+unregister_composites:
+ if (mcd->composite_clks)
+ mtk_clk_unregister_composites(mcd->composite_clks,
+ mcd->num_composite_clks, clk_data);
+unregister_muxes:
+ if (mcd->mux_clks)
+ mtk_clk_unregister_muxes(mcd->mux_clks,
+ mcd->num_mux_clks, clk_data);
+unregister_factors:
+ if (mcd->factor_clks)
+ mtk_clk_unregister_factors(mcd->factor_clks,
+ mcd->num_factor_clks, clk_data);
+unregister_fixed_clks:
+ if (mcd->fixed_clks)
+ mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
+ mcd->num_fixed_clks, clk_data);
free_data:
mtk_free_clk_data(clk_data);
+ if (mcd->shared_io && base)
+ iounmap(base);
+
+ pm_runtime_put(&pdev->dev);
return r;
}
EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
@@ -494,7 +582,20 @@ int mtk_clk_simple_remove(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
of_clk_del_provider(node);
- mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+ if (mcd->clks)
+ mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+ if (mcd->composite_clks)
+ mtk_clk_unregister_composites(mcd->composite_clks,
+ mcd->num_composite_clks, clk_data);
+ if (mcd->mux_clks)
+ mtk_clk_unregister_muxes(mcd->mux_clks,
+ mcd->num_mux_clks, clk_data);
+ if (mcd->factor_clks)
+ mtk_clk_unregister_factors(mcd->factor_clks,
+ mcd->num_factor_clks, clk_data);
+ if (mcd->fixed_clks)
+ mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
+ mcd->num_fixed_clks, clk_data);
mtk_free_clk_data(clk_data);
return 0;