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path: root/drivers/clk/hisilicon/clk.c
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-rw-r--r--drivers/clk/hisilicon/clk.c357
1 files changed, 357 insertions, 0 deletions
diff --git a/drivers/clk/hisilicon/clk.c b/drivers/clk/hisilicon/clk.c
new file mode 100644
index 000000000..953c8dace
--- /dev/null
+++ b/drivers/clk/hisilicon/clk.c
@@ -0,0 +1,357 @@
+/*
+ * Hisilicon clock driver
+ *
+ * Copyright (c) 2012-2013 Hisilicon Limited.
+ * Copyright (c) 2012-2013 Linaro Limited.
+ *
+ * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
+ * Xin Li <li.xin@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+
+#include "clk.h"
+
+static DEFINE_SPINLOCK(hisi_clk_lock);
+
+struct hisi_clock_data *hisi_clk_alloc(struct platform_device *pdev,
+ int nr_clks)
+{
+ struct hisi_clock_data *clk_data;
+ struct resource *res;
+ struct clk **clk_table;
+
+ clk_data = devm_kmalloc(&pdev->dev, sizeof(*clk_data), GFP_KERNEL);
+ if (!clk_data)
+ return NULL;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return NULL;
+ clk_data->base = devm_ioremap(&pdev->dev,
+ res->start, resource_size(res));
+ if (!clk_data->base)
+ return NULL;
+
+ clk_table = devm_kmalloc_array(&pdev->dev, nr_clks,
+ sizeof(*clk_table),
+ GFP_KERNEL);
+ if (!clk_table)
+ return NULL;
+
+ clk_data->clk_data.clks = clk_table;
+ clk_data->clk_data.clk_num = nr_clks;
+
+ return clk_data;
+}
+EXPORT_SYMBOL_GPL(hisi_clk_alloc);
+
+struct hisi_clock_data *hisi_clk_init(struct device_node *np,
+ int nr_clks)
+{
+ struct hisi_clock_data *clk_data;
+ struct clk **clk_table;
+ void __iomem *base;
+
+ base = of_iomap(np, 0);
+ if (!base) {
+ pr_err("%s: failed to map clock registers\n", __func__);
+ goto err;
+ }
+
+ clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
+ if (!clk_data)
+ goto err;
+
+ clk_data->base = base;
+ clk_table = kcalloc(nr_clks, sizeof(*clk_table), GFP_KERNEL);
+ if (!clk_table)
+ goto err_data;
+
+ clk_data->clk_data.clks = clk_table;
+ clk_data->clk_data.clk_num = nr_clks;
+ of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data->clk_data);
+ return clk_data;
+err_data:
+ kfree(clk_data);
+err:
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(hisi_clk_init);
+
+int hisi_clk_register_fixed_rate(const struct hisi_fixed_rate_clock *clks,
+ int nums, struct hisi_clock_data *data)
+{
+ struct clk *clk;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ clk = clk_register_fixed_rate(NULL, clks[i].name,
+ clks[i].parent_name,
+ clks[i].flags,
+ clks[i].fixed_rate);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ goto err;
+ }
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+
+ return 0;
+
+err:
+ while (i--)
+ clk_unregister_fixed_rate(data->clk_data.clks[clks[i].id]);
+
+ return PTR_ERR(clk);
+}
+EXPORT_SYMBOL_GPL(hisi_clk_register_fixed_rate);
+
+int hisi_clk_register_fixed_factor(const struct hisi_fixed_factor_clock *clks,
+ int nums,
+ struct hisi_clock_data *data)
+{
+ struct clk *clk;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ clk = clk_register_fixed_factor(NULL, clks[i].name,
+ clks[i].parent_name,
+ clks[i].flags, clks[i].mult,
+ clks[i].div);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ goto err;
+ }
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+
+ return 0;
+
+err:
+ while (i--)
+ clk_unregister_fixed_factor(data->clk_data.clks[clks[i].id]);
+
+ return PTR_ERR(clk);
+}
+EXPORT_SYMBOL_GPL(hisi_clk_register_fixed_factor);
+
+int hisi_clk_register_mux(const struct hisi_mux_clock *clks,
+ int nums, struct hisi_clock_data *data)
+{
+ struct clk *clk;
+ void __iomem *base = data->base;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ u32 mask = BIT(clks[i].width) - 1;
+
+ clk = clk_register_mux_table(NULL, clks[i].name,
+ clks[i].parent_names,
+ clks[i].num_parents, clks[i].flags,
+ base + clks[i].offset, clks[i].shift,
+ mask, clks[i].mux_flags,
+ clks[i].table, &hisi_clk_lock);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ goto err;
+ }
+
+ if (clks[i].alias)
+ clk_register_clkdev(clk, clks[i].alias, NULL);
+
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+
+ return 0;
+
+err:
+ while (i--)
+ clk_unregister_mux(data->clk_data.clks[clks[i].id]);
+
+ return PTR_ERR(clk);
+}
+EXPORT_SYMBOL_GPL(hisi_clk_register_mux);
+
+int hisi_clk_register_phase(struct device *dev,
+ const struct hisi_phase_clock *clks,
+ int nums, struct hisi_clock_data *data)
+{
+ void __iomem *base = data->base;
+ struct clk *clk;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ clk = clk_register_hisi_phase(dev, &clks[i], base,
+ &hisi_clk_lock);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n", __func__,
+ clks[i].name);
+ return PTR_ERR(clk);
+ }
+
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(hisi_clk_register_phase);
+
+int hisi_clk_register_divider(const struct hisi_divider_clock *clks,
+ int nums, struct hisi_clock_data *data)
+{
+ struct clk *clk;
+ void __iomem *base = data->base;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ clk = clk_register_divider_table(NULL, clks[i].name,
+ clks[i].parent_name,
+ clks[i].flags,
+ base + clks[i].offset,
+ clks[i].shift, clks[i].width,
+ clks[i].div_flags,
+ clks[i].table,
+ &hisi_clk_lock);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ goto err;
+ }
+
+ if (clks[i].alias)
+ clk_register_clkdev(clk, clks[i].alias, NULL);
+
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+
+ return 0;
+
+err:
+ while (i--)
+ clk_unregister_divider(data->clk_data.clks[clks[i].id]);
+
+ return PTR_ERR(clk);
+}
+EXPORT_SYMBOL_GPL(hisi_clk_register_divider);
+
+int hisi_clk_register_gate(const struct hisi_gate_clock *clks,
+ int nums, struct hisi_clock_data *data)
+{
+ struct clk *clk;
+ void __iomem *base = data->base;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ clk = clk_register_gate(NULL, clks[i].name,
+ clks[i].parent_name,
+ clks[i].flags,
+ base + clks[i].offset,
+ clks[i].bit_idx,
+ clks[i].gate_flags,
+ &hisi_clk_lock);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ goto err;
+ }
+
+ if (clks[i].alias)
+ clk_register_clkdev(clk, clks[i].alias, NULL);
+
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+
+ return 0;
+
+err:
+ while (i--)
+ clk_unregister_gate(data->clk_data.clks[clks[i].id]);
+
+ return PTR_ERR(clk);
+}
+EXPORT_SYMBOL_GPL(hisi_clk_register_gate);
+
+void hisi_clk_register_gate_sep(const struct hisi_gate_clock *clks,
+ int nums, struct hisi_clock_data *data)
+{
+ struct clk *clk;
+ void __iomem *base = data->base;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ clk = hisi_register_clkgate_sep(NULL, clks[i].name,
+ clks[i].parent_name,
+ clks[i].flags,
+ base + clks[i].offset,
+ clks[i].bit_idx,
+ clks[i].gate_flags,
+ &hisi_clk_lock);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ continue;
+ }
+
+ if (clks[i].alias)
+ clk_register_clkdev(clk, clks[i].alias, NULL);
+
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+}
+EXPORT_SYMBOL_GPL(hisi_clk_register_gate_sep);
+
+void __init hi6220_clk_register_divider(const struct hi6220_divider_clock *clks,
+ int nums, struct hisi_clock_data *data)
+{
+ struct clk *clk;
+ void __iomem *base = data->base;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ clk = hi6220_register_clkdiv(NULL, clks[i].name,
+ clks[i].parent_name,
+ clks[i].flags,
+ base + clks[i].offset,
+ clks[i].shift,
+ clks[i].width,
+ clks[i].mask_bit,
+ &hisi_clk_lock);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ continue;
+ }
+
+ if (clks[i].alias)
+ clk_register_clkdev(clk, clks[i].alias, NULL);
+
+ data->clk_data.clks[clks[i].id] = clk;
+ }
+}
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