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@xxxxxxxxxxxxxxxxxx> --- 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@xxxxxxxxxxxxxxxxxx> + * + * 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html