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Date: Wed, 22 Mar 2023 04:00:25 +0800
From: David Yang <mmyangfl@...il.com>
To: unlisted-recipients:; (no To-header on input)
Cc: David Yang <mmyangfl@...il.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>, linux-clk@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v6 4/6] clk: hisilicon: Add complex clock for Hi3798
Complex clock allows manipulating multiple bits simultaneously.
Signed-off-by: David Yang <mmyangfl@...il.com>
---
drivers/clk/hisilicon/crg-hi3798.c | 126 +++++++++++++++++++++++++++++
1 file changed, 126 insertions(+)
diff --git a/drivers/clk/hisilicon/crg-hi3798.c b/drivers/clk/hisilicon/crg-hi3798.c
index d05151d0e..78915bd26 100644
--- a/drivers/clk/hisilicon/crg-hi3798.c
+++ b/drivers/clk/hisilicon/crg-hi3798.c
@@ -7,9 +7,13 @@
#include <dt-bindings/clock/histb-clock.h>
#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/slab.h>
#include "clk.h"
#include "crg.h"
#include "reset.h"
@@ -59,6 +63,121 @@ static const struct hisi_fixed_rate_clock hi3798_fixed_rate_clks[] = {
{ HI3798_FIXED_250M, "250m", NULL, 0, 250000000, },
};
+struct hi3798_complex_clock {
+ unsigned int id;
+ const char *name;
+ const char *parent_name;
+ unsigned long flags;
+ unsigned long offset;
+ u32 mask;
+ u32 value;
+ const char *alias;
+};
+
+struct hi3798_clk_complex {
+ struct clk_hw hw;
+ void __iomem *reg;
+ u32 mask;
+ u32 value;
+};
+
+#define to_complex_clk(_hw) container_of(_hw, struct hi3798_clk_complex, hw)
+
+static int hi3798_clk_complex_prepare(struct clk_hw *hw)
+{
+ struct hi3798_clk_complex *clk = to_complex_clk(hw);
+ u32 val;
+
+ val = readl_relaxed(clk->reg);
+ val &= ~(clk->mask);
+ val |= clk->value;
+ writel_relaxed(val, clk->reg);
+
+ return 0;
+}
+
+static void hi3798_clk_complex_unprepare(struct clk_hw *hw)
+{
+ struct hi3798_clk_complex *clk = to_complex_clk(hw);
+ u32 val;
+
+ val = readl_relaxed(clk->reg);
+ val &= ~(clk->mask);
+ writel_relaxed(val, clk->reg);
+}
+
+static int hi3798_clk_complex_is_prepared(struct clk_hw *hw)
+{
+ struct hi3798_clk_complex *clk = to_complex_clk(hw);
+ u32 val;
+
+ val = readl_relaxed(clk->reg);
+ return (val & clk->mask) == clk->value;
+}
+
+static const struct clk_ops hi3798_clk_complex_ops = {
+ .prepare = hi3798_clk_complex_prepare,
+ .unprepare = hi3798_clk_complex_unprepare,
+ .is_prepared = hi3798_clk_complex_is_prepared,
+};
+
+static int hi3798_clk_register_complex(struct device *dev,
+ const struct hi3798_complex_clock *clks, int nums,
+ struct hisi_clock_data *data)
+{
+ void __iomem *base = data->base;
+ int i;
+ int ret;
+
+ for (i = 0; i < nums; i++) {
+ struct hi3798_clk_complex *p_clk;
+ struct clk_init_data init;
+
+ p_clk = devm_kzalloc(dev, sizeof(*p_clk), GFP_KERNEL);
+ if (!p_clk)
+ return -ENOMEM;
+
+ init.name = clks[i].name;
+ init.ops = &hi3798_clk_complex_ops;
+
+ init.flags = 0;
+ init.parent_names =
+ (clks[i].parent_name ? &clks[i].parent_name : NULL);
+ init.num_parents = (clks[i].parent_name ? 1 : 0);
+
+ p_clk->reg = base + clks[i].offset;
+ p_clk->mask = clks[i].mask;
+ p_clk->value = clks[i].value;
+ p_clk->hw.init = &init;
+
+ ret = devm_clk_hw_register(dev, &p_clk->hw);
+ if (ret) {
+ pr_err("%s: failed to register clock %s\n",
+ __func__, clks[i].name);
+ return ret;
+ }
+
+ if (clks[i].alias)
+ clk_register_clkdev(clk, clks[i].alias, NULL);
+
+ data->clk_data->hws[clks[i].id] = &p_clk->hw;
+ }
+
+ return 0;
+}
+
+static void hi3798_clk_unregister_complex(const struct hi3798_complex_clock *clks, int nums,
+ struct hisi_clock_data *data)
+{
+ struct clk **clocks = data->clk_data.clks;
+ int i;
+
+ for (i = 0; i < nums; i++) {
+ if (clocks[clks[i].id])
+ clk_unregister(clocks[clks[i].id]);
+ }
+}
+
struct hi3798_clks {
const struct hisi_gate_clock *gate_clks;
int gate_clks_nums;
@@ -66,6 +185,8 @@ struct hi3798_clks {
int mux_clks_nums;
const struct hisi_phase_clock *phase_clks;
int phase_clks_nums;
+ const struct hi3798_complex_clock *complex_clks;
+ int complex_clks_nums;
};
static struct hisi_clock_data *
@@ -100,6 +221,11 @@ hi3798_clk_register(struct platform_device *pdev,
if (ret)
return ERR_PTR(ret);
+ ret = hi3798_clk_register_complex(dev, clks->complex_clks,
+ clks->complex_clks_nums, clk_data);
+ if (ret)
+ return ERR_PTR(ret);
+
ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
clk_data->clk_data);
if (ret)
--
2.39.2
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