+// SPDX-License-Identifier: GPL-2.0+
/*
- * Copyright (C) 2016 Socionext Inc.
+ * Copyright (C) 2016-2017 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <dm/device_compat.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/sizes.h>
-#include <clk-uclass.h>
-#include <dm/device.h>
#include "clk-uniphier.h"
-static int uniphier_clk_enable(struct clk *clk)
+/**
+ * struct uniphier_clk_priv - private data for UniPhier clock driver
+ *
+ * @base: base address of the clock provider
+ * @data: SoC specific data
+ */
+struct uniphier_clk_priv {
+ struct udevice *dev;
+ void __iomem *base;
+ const struct uniphier_clk_data *data;
+};
+
+static void uniphier_clk_gate_enable(struct uniphier_clk_priv *priv,
+ const struct uniphier_clk_gate_data *gate)
{
- struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
- const struct uniphier_clk_gate_data *gate = priv->socdata->gate;
- unsigned int nr_gate = priv->socdata->nr_gate;
- void __iomem *reg;
- u32 mask, data, tmp;
+ u32 val;
+
+ val = readl(priv->base + gate->reg);
+ val |= BIT(gate->bit);
+ writel(val, priv->base + gate->reg);
+}
+
+static void uniphier_clk_mux_set_parent(struct uniphier_clk_priv *priv,
+ const struct uniphier_clk_mux_data *mux,
+ u8 id)
+{
+ u32 val;
int i;
- for (i = 0; i < nr_gate; i++) {
- if (gate[i].index != clk->id)
+ for (i = 0; i < mux->num_parents; i++) {
+ if (mux->parent_ids[i] != id)
continue;
- reg = priv->base + gate[i].reg;
- mask = gate[i].mask;
- data = gate[i].data & mask;
-
- tmp = readl(reg);
- tmp &= ~mask;
- tmp |= data & mask;
- debug("%s: %p: %08x\n", __func__, reg, tmp);
- writel(tmp, reg);
+ val = readl(priv->base + mux->reg);
+ val &= ~mux->masks[i];
+ val |= mux->vals[i];
+ writel(val, priv->base + mux->reg);
+ return;
}
- return 0;
+ WARN_ON(1);
}
-static ulong uniphier_clk_get_rate(struct clk *clk)
+static u8 uniphier_clk_mux_get_parent(struct uniphier_clk_priv *priv,
+ const struct uniphier_clk_mux_data *mux)
{
- struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
- const struct uniphier_clk_rate_data *rdata = priv->socdata->rate;
- unsigned int nr_rdata = priv->socdata->nr_rate;
- void __iomem *reg;
- u32 mask, data;
- ulong matched_rate = 0;
+ u32 val;
int i;
- for (i = 0; i < nr_rdata; i++) {
- if (rdata[i].index != clk->id)
- continue;
+ val = readl(priv->base + mux->reg);
- if (rdata[i].reg == UNIPHIER_CLK_RATE_IS_FIXED)
- return rdata[i].rate;
-
- reg = priv->base + rdata[i].reg;
- mask = rdata[i].mask;
- data = rdata[i].data & mask;
- if ((readl(reg) & mask) == data) {
- if (matched_rate && rdata[i].rate != matched_rate) {
- printf("failed to get clk rate for insane register values\n");
- return -EINVAL;
- }
- matched_rate = rdata[i].rate;
- }
+ for (i = 0; i < mux->num_parents; i++)
+ if ((mux->masks[i] & val) == mux->vals[i])
+ return mux->parent_ids[i];
+
+ dev_err(priv->dev, "invalid mux setting\n");
+
+ return UNIPHIER_CLK_ID_INVALID;
+}
+
+static const struct uniphier_clk_data *uniphier_clk_get_data(
+ struct uniphier_clk_priv *priv, u8 id)
+{
+ const struct uniphier_clk_data *data;
+
+ for (data = priv->data; data->type != UNIPHIER_CLK_TYPE_END; data++)
+ if (data->id == id)
+ return data;
+
+ dev_err(priv->dev, "id=%u not found\n", id);
+
+ return NULL;
+}
+
+static const struct uniphier_clk_data *uniphier_clk_get_parent_data(
+ struct uniphier_clk_priv *priv,
+ const struct uniphier_clk_data *data)
+{
+ const struct uniphier_clk_data *parent_data;
+ u8 parent_id = UNIPHIER_CLK_ID_INVALID;
+
+ switch (data->type) {
+ case UNIPHIER_CLK_TYPE_GATE:
+ parent_id = data->data.gate.parent_id;
+ break;
+ case UNIPHIER_CLK_TYPE_MUX:
+ parent_id = uniphier_clk_mux_get_parent(priv, &data->data.mux);
+ break;
+ default:
+ break;
}
- debug("%s: rate = %lu\n", __func__, matched_rate);
+ if (parent_id == UNIPHIER_CLK_ID_INVALID)
+ return NULL;
+
+ parent_data = uniphier_clk_get_data(priv, parent_id);
+
+ WARN_ON(!parent_data);
+
+ return parent_data;
+}
+
+static void __uniphier_clk_enable(struct uniphier_clk_priv *priv,
+ const struct uniphier_clk_data *data)
+{
+ const struct uniphier_clk_data *parent_data;
+
+ if (data->type == UNIPHIER_CLK_TYPE_GATE)
+ uniphier_clk_gate_enable(priv, &data->data.gate);
+
+ parent_data = uniphier_clk_get_parent_data(priv, data);
+ if (!parent_data)
+ return;
+
+ return __uniphier_clk_enable(priv, parent_data);
+}
+
+static int uniphier_clk_enable(struct clk *clk)
+{
+ struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
+ const struct uniphier_clk_data *data;
+
+ data = uniphier_clk_get_data(priv, clk->id);
+ if (!data)
+ return -ENODEV;
+
+ __uniphier_clk_enable(priv, data);
- return matched_rate;
+ return 0;
}
-static ulong uniphier_clk_set_rate(struct clk *clk, ulong rate)
+static unsigned long __uniphier_clk_get_rate(
+ struct uniphier_clk_priv *priv,
+ const struct uniphier_clk_data *data)
+{
+ const struct uniphier_clk_data *parent_data;
+
+ if (data->type == UNIPHIER_CLK_TYPE_FIXED_RATE)
+ return data->data.rate.fixed_rate;
+
+ parent_data = uniphier_clk_get_parent_data(priv, data);
+ if (!parent_data)
+ return 0;
+
+ return __uniphier_clk_get_rate(priv, parent_data);
+}
+
+static unsigned long uniphier_clk_get_rate(struct clk *clk)
{
struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
- const struct uniphier_clk_rate_data *rdata = priv->socdata->rate;
- unsigned int nr_rdata = priv->socdata->nr_rate;
- void __iomem *reg;
- u32 mask, data, tmp;
- ulong best_rate = 0;
+ const struct uniphier_clk_data *data;
+
+ data = uniphier_clk_get_data(priv, clk->id);
+ if (!data)
+ return -ENODEV;
+
+ return __uniphier_clk_get_rate(priv, data);
+}
+
+static unsigned long __uniphier_clk_set_rate(
+ struct uniphier_clk_priv *priv,
+ const struct uniphier_clk_data *data,
+ unsigned long rate, bool set)
+{
+ const struct uniphier_clk_data *best_parent_data = NULL;
+ const struct uniphier_clk_data *parent_data;
+ unsigned long best_rate = 0;
+ unsigned long parent_rate;
+ u8 parent_id;
int i;
- /* first, decide the best match rate */
- for (i = 0; i < nr_rdata; i++) {
- if (rdata[i].index != clk->id)
- continue;
+ if (data->type == UNIPHIER_CLK_TYPE_FIXED_RATE)
+ return data->data.rate.fixed_rate;
- if (rdata[i].reg == UNIPHIER_CLK_RATE_IS_FIXED)
+ if (data->type == UNIPHIER_CLK_TYPE_GATE) {
+ parent_data = uniphier_clk_get_parent_data(priv, data);
+ if (!parent_data)
return 0;
- if (rdata[i].rate > best_rate && rdata[i].rate <= rate)
- best_rate = rdata[i].rate;
+ return __uniphier_clk_set_rate(priv, parent_data, rate, set);
}
- if (!best_rate)
- return -ENODEV;
-
- debug("%s: requested rate = %lu, set rate = %lu\n", __func__,
- rate, best_rate);
+ if (WARN_ON(data->type != UNIPHIER_CLK_TYPE_MUX))
+ return -EINVAL;
- /* second, really set registers */
- for (i = 0; i < nr_rdata; i++) {
- if (rdata[i].index != clk->id || rdata[i].rate != best_rate)
- continue;
+ for (i = 0; i < data->data.mux.num_parents; i++) {
+ parent_id = data->data.mux.parent_ids[i];
+ parent_data = uniphier_clk_get_data(priv, parent_id);
+ if (WARN_ON(!parent_data))
+ return -EINVAL;
- reg = priv->base + rdata[i].reg;
- mask = rdata[i].mask;
- data = rdata[i].data & mask;
+ parent_rate = __uniphier_clk_set_rate(priv, parent_data, rate,
+ false);
- tmp = readl(reg);
- tmp &= ~mask;
- tmp |= data;
- debug("%s: %p: %08x\n", __func__, reg, tmp);
- writel(tmp, reg);
+ if (parent_rate <= rate && best_rate < parent_rate) {
+ best_rate = parent_rate;
+ best_parent_data = parent_data;
+ }
}
- return best_rate;
+ dev_dbg(priv->dev, "id=%u, best_rate=%lu\n", data->id, best_rate);
+
+ if (!best_parent_data)
+ return -EINVAL;
+
+ if (!set)
+ return best_rate;
+
+ uniphier_clk_mux_set_parent(priv, &data->data.mux,
+ best_parent_data->id);
+
+ return best_rate = __uniphier_clk_set_rate(priv, best_parent_data,
+ rate, true);
+}
+
+static unsigned long uniphier_clk_set_rate(struct clk *clk, ulong rate)
+{
+ struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
+ const struct uniphier_clk_data *data;
+
+ data = uniphier_clk_get_data(priv, clk->id);
+ if (!data)
+ return -ENODEV;
+
+ return __uniphier_clk_set_rate(priv, data, rate, true);
}
-const struct clk_ops uniphier_clk_ops = {
+static const struct clk_ops uniphier_clk_ops = {
.enable = uniphier_clk_enable,
.get_rate = uniphier_clk_get_rate,
.set_rate = uniphier_clk_set_rate,
};
-int uniphier_clk_probe(struct udevice *dev)
+static int uniphier_clk_probe(struct udevice *dev)
{
struct uniphier_clk_priv *priv = dev_get_priv(dev);
fdt_addr_t addr;
- addr = dev_get_addr(dev);
+ addr = devfdt_get_addr(dev->parent);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
if (!priv->base)
return -ENOMEM;
- priv->socdata = (void *)dev_get_driver_data(dev);
+ priv->dev = dev;
+ priv->data = (void *)dev_get_driver_data(dev);
return 0;
}
+
+static const struct udevice_id uniphier_clk_match[] = {
+ /* System clock */
+ {
+ .compatible = "socionext,uniphier-ld4-clock",
+ .data = (ulong)uniphier_pxs2_sys_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pro4-clock",
+ .data = (ulong)uniphier_pxs2_sys_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-sld8-clock",
+ .data = (ulong)uniphier_pxs2_sys_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pro5-clock",
+ .data = (ulong)uniphier_pxs2_sys_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs2-clock",
+ .data = (ulong)uniphier_pxs2_sys_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-ld11-clock",
+ .data = (ulong)uniphier_ld20_sys_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-ld20-clock",
+ .data = (ulong)uniphier_ld20_sys_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs3-clock",
+ .data = (ulong)uniphier_pxs3_sys_clk_data,
+ },
+ /* Media I/O clock */
+ {
+ .compatible = "socionext,uniphier-ld4-mio-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pro4-mio-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-sld8-mio-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pro5-sd-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs2-sd-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-ld11-mio-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-ld20-sd-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs3-sd-clock",
+ .data = (ulong)uniphier_mio_clk_data,
+ },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(uniphier_clk) = {
+ .name = "uniphier-clk",
+ .id = UCLASS_CLK,
+ .of_match = uniphier_clk_match,
+ .probe = uniphier_clk_probe,
+ .priv_auto_alloc_size = sizeof(struct uniphier_clk_priv),
+ .ops = &uniphier_clk_ops,
+};
projects / oweals / u-boot.git / blobdiff