[PATCH v2 07/26] clk: sunxi: Add TCON channel1 clock
Maxime Ripard
maxime.ripard at free-electrons.com
Thu Jan 14 07:24:50 PST 2016
The TCON is a controller generating the timings to output videos signals,
acting like both a CRTC and an encoder.
It has two channels depending on the output, each channel being driven by
its own clock (and own clock controller).
Add a driver for the channel 1 clock.
Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
---
Documentation/devicetree/bindings/clock/sunxi.txt | 1 +
drivers/clk/sunxi/Makefile | 1 +
drivers/clk/sunxi/clk-sun4i-tcon-ch1.c | 154 ++++++++++++++++++++++
3 files changed, 156 insertions(+)
create mode 100644 drivers/clk/sunxi/clk-sun4i-tcon-ch1.c
diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
index bb9fb78dcff8..fe34fc56e803 100644
--- a/Documentation/devicetree/bindings/clock/sunxi.txt
+++ b/Documentation/devicetree/bindings/clock/sunxi.txt
@@ -67,6 +67,7 @@ Required properties:
"allwinner,sun7i-a20-out-clk" - for the external output clocks
"allwinner,sun7i-a20-gmac-clk" - for the GMAC clock module on A20/A31
"allwinner,sun4i-a10-tcon-ch0-clk" - for the TCON channel 0 clock on the A10
+ "allwinner,sun4i-a10-tcon-ch1-clk" - for the TCON channel 1 clock on the A10
"allwinner,sun4i-a10-usb-clk" - for usb gates + resets on A10 / A20
"allwinner,sun5i-a13-usb-clk" - for usb gates + resets on A13
"allwinner,sun6i-a31-usb-clk" - for usb gates + resets on A31
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
index 40c32ffd912c..0a20873cd103 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -12,6 +12,7 @@ obj-y += clk-mod0.o
obj-y += clk-simple-gates.o
obj-y += clk-sun4i-display.o
obj-y += clk-sun4i-pll3.o
+obj-y += clk-sun4i-tcon-ch1.o
obj-y += clk-sun8i-mbus.o
obj-y += clk-sun9i-core.o
obj-y += clk-sun9i-mmc.o
diff --git a/drivers/clk/sunxi/clk-sun4i-tcon-ch1.c b/drivers/clk/sunxi/clk-sun4i-tcon-ch1.c
new file mode 100644
index 000000000000..51ddc38821f7
--- /dev/null
+++ b/drivers/clk/sunxi/clk-sun4i-tcon-ch1.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2015 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard at free-electrons.com>
+ *
+ * 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.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#define SUN4I_TCON_CH1_SCLK_NAME_LEN 32
+
+#define SUN4I_A10_TCON_CH1_SCLK2_PARENTS 4
+
+#define SUN4I_A10_TCON_CH1_SCLK2_GATE_BIT 31
+#define SUN4I_A10_TCON_CH1_SCLK2_MUX_MASK 3
+#define SUN4I_A10_TCON_CH1_SCLK2_MUX_SHIFT 24
+#define SUN4I_A10_TCON_CH1_SCLK2_DIV_WIDTH 4
+#define SUN4I_A10_TCON_CH1_SCLK2_DIV_SHIFT 0
+
+#define SUN4I_A10_TCON_CH1_SCLK1_GATE_BIT 15
+#define SUN4I_A10_TCON_CH1_SCLK1_DIV_WIDTH 1
+#define SUN4I_A10_TCON_CH1_SCLK1_DIV_SHIFT 11
+
+static DEFINE_SPINLOCK(sun4i_a10_tcon_ch1_lock);
+
+static void __init sun4i_a10_tcon_ch1_setup(struct device_node *node)
+{
+ const char *sclk2_parents[SUN4I_A10_TCON_CH1_SCLK2_PARENTS];
+ const char *sclk1_name = node->name;
+ const char *sclk2_name;
+ struct clk_divider *sclk1_div, *sclk2_div;
+ struct clk_gate *sclk1_gate, *sclk2_gate;
+ struct clk_mux *sclk2_mux;
+ struct clk *sclk1, *sclk2;
+ void __iomem *reg;
+ int i, ret;
+
+ of_property_read_string(node, "clock-output-names",
+ &sclk1_name);
+
+ sclk2_name = kasprintf(GFP_KERNEL, "%s2", sclk1_name);
+ if (!sclk2_name)
+ return;
+
+ reg = of_io_request_and_map(node, 0, of_node_full_name(node));
+ if (IS_ERR(reg)) {
+ pr_err("%s: Could not map the clock registers\n", sclk2_name);
+ return;
+ }
+
+ for (i = 0; i < SUN4I_A10_TCON_CH1_SCLK2_PARENTS; i++)
+ sclk2_parents[i] = of_clk_get_parent_name(node, i);
+
+ sclk2_mux = kzalloc(sizeof(*sclk2_mux), GFP_KERNEL);
+ if (!sclk2_mux)
+ return;
+
+ sclk2_mux->reg = reg;
+ sclk2_mux->shift = SUN4I_A10_TCON_CH1_SCLK2_MUX_SHIFT;
+ sclk2_mux->mask = SUN4I_A10_TCON_CH1_SCLK2_MUX_MASK;
+ sclk2_mux->lock = &sun4i_a10_tcon_ch1_lock;
+
+ sclk2_gate = kzalloc(sizeof(*sclk2_gate), GFP_KERNEL);
+ if (!sclk2_gate)
+ goto free_sclk2_mux;
+
+ sclk2_gate->reg = reg;
+ sclk2_gate->bit_idx = SUN4I_A10_TCON_CH1_SCLK2_GATE_BIT;
+ sclk2_gate->lock = &sun4i_a10_tcon_ch1_lock;
+
+ sclk2_div = kzalloc(sizeof(*sclk2_div), GFP_KERNEL);
+ if (!sclk2_div)
+ goto free_sclk2_gate;
+
+ sclk2_div->reg = reg;
+ sclk2_div->shift = SUN4I_A10_TCON_CH1_SCLK2_DIV_SHIFT;
+ sclk2_div->width = SUN4I_A10_TCON_CH1_SCLK2_DIV_WIDTH;
+ sclk2_div->lock = &sun4i_a10_tcon_ch1_lock;
+
+ sclk2 = clk_register_composite(NULL, sclk2_name, sclk2_parents,
+ SUN4I_A10_TCON_CH1_SCLK2_PARENTS,
+ &sclk2_mux->hw, &clk_mux_ops, &
+ sclk2_div->hw, &clk_divider_ops,
+ &sclk2_gate->hw, &clk_gate_ops,
+ 0);
+ if (IS_ERR(sclk2)) {
+ pr_err("%s: Couldn't register the clock\n", sclk2_name);
+ goto free_sclk2_div;
+ }
+
+ sclk1_div = kzalloc(sizeof(*sclk1_div), GFP_KERNEL);
+ if (!sclk1_div)
+ goto free_sclk2;
+
+ sclk1_div->reg = reg;
+ sclk1_div->shift = SUN4I_A10_TCON_CH1_SCLK1_DIV_SHIFT;
+ sclk1_div->width = SUN4I_A10_TCON_CH1_SCLK1_DIV_WIDTH;
+ sclk1_div->lock = &sun4i_a10_tcon_ch1_lock;
+
+ sclk1_gate = kzalloc(sizeof(*sclk1_gate), GFP_KERNEL);
+ if (!sclk1_gate)
+ goto free_sclk1_mux;
+
+ sclk1_gate->reg = reg;
+ sclk1_gate->bit_idx = SUN4I_A10_TCON_CH1_SCLK1_GATE_BIT;
+ sclk1_gate->lock = &sun4i_a10_tcon_ch1_lock;
+
+ sclk1 = clk_register_composite(NULL, sclk1_name, &sclk2_name, 1,
+ NULL, NULL,
+ &sclk1_div->hw, &clk_divider_ops,
+ &sclk1_gate->hw, &clk_gate_ops,
+ 0);
+ if (IS_ERR(sclk1)) {
+ pr_err("%s: Couldn't register the clock\n", sclk1_name);
+ goto free_sclk1_gate;
+ }
+
+ ret = of_clk_add_provider(node, of_clk_src_simple_get, sclk1);
+ if (WARN_ON(ret))
+ goto free_sclk1;
+
+ return;
+
+free_sclk1:
+ clk_unregister_composite(sclk1);
+free_sclk1_gate:
+ kfree(sclk1_gate);
+free_sclk1_mux:
+ kfree(sclk1_div);
+free_sclk2:
+ clk_unregister(sclk2);
+free_sclk2_div:
+ kfree(sclk2_div);
+free_sclk2_gate:
+ kfree(sclk2_gate);
+free_sclk2_mux:
+ kfree(sclk2_mux);
+}
+
+CLK_OF_DECLARE(sun4i_a10_tcon_ch1, "allwinner,sun4i-a10-tcon-ch1-clk",
+ sun4i_a10_tcon_ch1_setup);
--
2.6.4
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