diff options
author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2015-07-31 19:46:22 +0200 |
---|---|---|
committer | Stephen Boyd <sboyd@codeaurora.org> | 2015-08-12 00:59:15 -0700 |
commit | ee38b2698ae234c03f65ccafa1811d4dda3c316d (patch) | |
tree | 0c999c9deecd2820833ade80806e9608e9d57be3 /drivers | |
parent | 06f282757acb92b5bdb208bebd38a4785fae49bd (diff) |
clk: sunxi: Add a simple gates driver
The gates were handled with a common piece of framework that was
registering all gates array, that was not using the CLK_OF_DECLARE logic,
and was not using clock-indices but some private masks that were pretty
much equivalent.
Move this code in a new driver that handles all the gates array and solves
both these issues.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
[sboyd@codeaurora.org: Include clk.h for consumer API usage]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clk/sunxi/Makefile | 1 | ||||
-rw-r--r-- | drivers/clk/sunxi/clk-simple-gates.c | 158 | ||||
-rw-r--r-- | drivers/clk/sunxi/clk-sunxi.c | 177 |
3 files changed, 159 insertions, 177 deletions
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile index 058f273d6154..f5a35b82cc1a 100644 --- a/drivers/clk/sunxi/Makefile +++ b/drivers/clk/sunxi/Makefile @@ -6,6 +6,7 @@ obj-y += clk-sunxi.o clk-factors.o obj-y += clk-a10-hosc.o obj-y += clk-a20-gmac.o obj-y += clk-mod0.o +obj-y += clk-simple-gates.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-simple-gates.c b/drivers/clk/sunxi/clk-simple-gates.c new file mode 100644 index 000000000000..6ce91180da1b --- /dev/null +++ b/drivers/clk/sunxi/clk-simple-gates.c @@ -0,0 +1,158 @@ +/* + * Copyright 2015 Maxime Ripard + * + * Maxime Ripard <maxime.ripard@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.h> +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +static DEFINE_SPINLOCK(gates_lock); + +static void __init sunxi_simple_gates_setup(struct device_node *node, + const int protected[], + int nprotected) +{ + struct clk_onecell_data *clk_data; + const char *clk_parent, *clk_name; + struct property *prop; + struct resource res; + void __iomem *clk_reg; + void __iomem *reg; + const __be32 *p; + int number, i = 0, j; + u8 clk_bit; + u32 index; + + reg = of_io_request_and_map(node, 0, of_node_full_name(node)); + if (IS_ERR(reg)) + return; + + clk_parent = of_clk_get_parent_name(node, 0); + + clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL); + if (!clk_data) + goto err_unmap; + + number = of_property_count_u32_elems(node, "clock-indices"); + of_property_read_u32_index(node, "clock-indices", number - 1, &number); + + clk_data->clks = kcalloc(number + 1, sizeof(struct clk *), GFP_KERNEL); + if (!clk_data->clks) + goto err_free_data; + + of_property_for_each_u32(node, "clock-indices", prop, p, index) { + of_property_read_string_index(node, "clock-output-names", + i, &clk_name); + + clk_reg = reg + 4 * (index / 32); + clk_bit = index % 32; + + clk_data->clks[index] = clk_register_gate(NULL, clk_name, + clk_parent, 0, + clk_reg, + clk_bit, + 0, &gates_lock); + i++; + + if (IS_ERR(clk_data->clks[index])) { + WARN_ON(true); + continue; + } + + for (j = 0; j < nprotected; j++) + if (protected[j] == index) + clk_prepare_enable(clk_data->clks[index]); + + } + + clk_data->clk_num = number + 1; + of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); + + return; + +err_free_data: + kfree(clk_data); +err_unmap: + iounmap(reg); + of_address_to_resource(node, 0, &res); + release_mem_region(res.start, resource_size(&res)); +} + +static void __init sunxi_simple_gates_init(struct device_node *node) +{ + sunxi_simple_gates_setup(node, NULL, 0); +} + +CLK_OF_DECLARE(sun4i_a10_apb0, "allwinner,sun4i-a10-apb0-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun4i_a10_apb1, "allwinner,sun4i-a10-apb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun4i_a10_axi, "allwinner,sun4i-a10-axi-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun5i_a10s_apb0, "allwinner,sun5i-a10s-apb0-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun5i_a10s_apb1, "allwinner,sun5i-a10s-apb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun5i_a13_apb0, "allwinner,sun5i-a13-apb0-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun5i_a13_apb1, "allwinner,sun5i-a13-apb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun6i_a31_ahb1, "allwinner,sun6i-a31-ahb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun6i_a31_apb1, "allwinner,sun6i-a31-apb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun6i_a31_apb2, "allwinner,sun6i-a31-apb2-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun7i_a20_apb0, "allwinner,sun7i-a20-apb0-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun7i_a20_apb1, "allwinner,sun7i-a20-apb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun8i_a23_ahb1, "allwinner,sun8i-a23-ahb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun8i_a23_apb1, "allwinner,sun8i-a23-apb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun8i_a23_apb2, "allwinner,sun8i-a23-apb2-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun9i_a80_ahb0, "allwinner,sun9i-a80-ahb0-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun9i_a80_ahb1, "allwinner,sun9i-a80-ahb1-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun9i_a80_ahb2, "allwinner,sun9i-a80-ahb2-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun9i_a80_apb0, "allwinner,sun9i-a80-apb0-gates-clk", + sunxi_simple_gates_init); +CLK_OF_DECLARE(sun9i_a80_apb1, "allwinner,sun9i-a80-apb1-gates-clk", + sunxi_simple_gates_init); + +static const int sun4i_a10_ahb_critical_clocks[] __initconst = { + 14, /* ahb_sdram */ +}; + +static void __init sun4i_a10_ahb_init(struct device_node *node) +{ + sunxi_simple_gates_setup(node, sun4i_a10_ahb_critical_clocks, + ARRAY_SIZE(sun4i_a10_ahb_critical_clocks)); +} +CLK_OF_DECLARE(sun4i_a10_ahb, "allwinner,sun4i-a10-ahb-gates-clk", + sun4i_a10_ahb_init); +CLK_OF_DECLARE(sun5i_a10s_ahb, "allwinner,sun5i-a10s-ahb-gates-clk", + sun4i_a10_ahb_init); +CLK_OF_DECLARE(sun5i_a13_ahb, "allwinner,sun5i-a13-ahb-gates-clk", + sun4i_a10_ahb_init); +CLK_OF_DECLARE(sun7i_a20_ahb, "allwinner,sun7i-a20-ahb-gates-clk", + sun4i_a10_ahb_init); diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index 1c5b1369e8f3..b100f4f051fd 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -896,150 +896,6 @@ struct gates_data { DECLARE_BITMAP(mask, SUNXI_GATES_MAX_SIZE); }; -static const struct gates_data sun4i_axi_gates_data __initconst = { - .mask = {1}, -}; - -static const struct gates_data sun4i_ahb_gates_data __initconst = { - .mask = {0x7F77FFF, 0x14FB3F}, -}; - -static const struct gates_data sun5i_a10s_ahb_gates_data __initconst = { - .mask = {0x147667e7, 0x185915}, -}; - -static const struct gates_data sun5i_a13_ahb_gates_data __initconst = { - .mask = {0x107067e7, 0x185111}, -}; - -static const struct gates_data sun6i_a31_ahb1_gates_data __initconst = { - .mask = {0xEDFE7F62, 0x794F931}, -}; - -static const struct gates_data sun7i_a20_ahb_gates_data __initconst = { - .mask = { 0x12f77fff, 0x16ff3f }, -}; - -static const struct gates_data sun8i_a23_ahb1_gates_data __initconst = { - .mask = {0x25386742, 0x2505111}, -}; - -static const struct gates_data sun9i_a80_ahb0_gates_data __initconst = { - .mask = {0xF5F12B}, -}; - -static const struct gates_data sun9i_a80_ahb1_gates_data __initconst = { - .mask = {0x1E20003}, -}; - -static const struct gates_data sun9i_a80_ahb2_gates_data __initconst = { - .mask = {0x9B7}, -}; - -static const struct gates_data sun4i_apb0_gates_data __initconst = { - .mask = {0x4EF}, -}; - -static const struct gates_data sun5i_a10s_apb0_gates_data __initconst = { - .mask = {0x469}, -}; - -static const struct gates_data sun5i_a13_apb0_gates_data __initconst = { - .mask = {0x61}, -}; - -static const struct gates_data sun7i_a20_apb0_gates_data __initconst = { - .mask = { 0x4ff }, -}; - -static const struct gates_data sun9i_a80_apb0_gates_data __initconst = { - .mask = {0xEB822}, -}; - -static const struct gates_data sun4i_apb1_gates_data __initconst = { - .mask = {0xFF00F7}, -}; - -static const struct gates_data sun5i_a10s_apb1_gates_data __initconst = { - .mask = {0xf0007}, -}; - -static const struct gates_data sun5i_a13_apb1_gates_data __initconst = { - .mask = {0xa0007}, -}; - -static const struct gates_data sun6i_a31_apb1_gates_data __initconst = { - .mask = {0x3031}, -}; - -static const struct gates_data sun8i_a23_apb1_gates_data __initconst = { - .mask = {0x3021}, -}; - -static const struct gates_data sun6i_a31_apb2_gates_data __initconst = { - .mask = {0x3F000F}, -}; - -static const struct gates_data sun7i_a20_apb1_gates_data __initconst = { - .mask = { 0xff80ff }, -}; - -static const struct gates_data sun9i_a80_apb1_gates_data __initconst = { - .mask = {0x3F001F}, -}; - -static const struct gates_data sun8i_a23_apb2_gates_data __initconst = { - .mask = {0x1F0007}, -}; - -static void __init sunxi_gates_clk_setup(struct device_node *node, - struct gates_data *data) -{ - struct clk_onecell_data *clk_data; - const char *clk_parent; - const char *clk_name; - void __iomem *reg; - int qty; - int i = 0; - int j = 0; - - reg = of_iomap(node, 0); - - clk_parent = of_clk_get_parent_name(node, 0); - - /* Worst-case size approximation and memory allocation */ - qty = find_last_bit(data->mask, SUNXI_GATES_MAX_SIZE); - clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL); - if (!clk_data) - return; - clk_data->clks = kzalloc((qty+1) * sizeof(struct clk *), GFP_KERNEL); - if (!clk_data->clks) { - kfree(clk_data); - return; - } - - for_each_set_bit(i, data->mask, SUNXI_GATES_MAX_SIZE) { - of_property_read_string_index(node, "clock-output-names", - j, &clk_name); - - clk_data->clks[i] = clk_register_gate(NULL, clk_name, - clk_parent, 0, - reg + 4 * (i/32), i % 32, - 0, &clk_lock); - WARN_ON(IS_ERR(clk_data->clks[i])); - clk_register_clkdev(clk_data->clks[i], clk_name, NULL); - - j++; - } - - /* Adjust to the real max */ - clk_data->clk_num = i; - - of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); -} - - - /** * sunxi_divs_clk_setup() helper data */ @@ -1277,34 +1133,6 @@ static const struct of_device_id clk_mux_match[] __initconst = { {} }; -/* Matches for gate clocks */ -static const struct of_device_id clk_gates_match[] __initconst = { - {.compatible = "allwinner,sun4i-a10-axi-gates-clk", .data = &sun4i_axi_gates_data,}, - {.compatible = "allwinner,sun4i-a10-ahb-gates-clk", .data = &sun4i_ahb_gates_data,}, - {.compatible = "allwinner,sun5i-a10s-ahb-gates-clk", .data = &sun5i_a10s_ahb_gates_data,}, - {.compatible = "allwinner,sun5i-a13-ahb-gates-clk", .data = &sun5i_a13_ahb_gates_data,}, - {.compatible = "allwinner,sun6i-a31-ahb1-gates-clk", .data = &sun6i_a31_ahb1_gates_data,}, - {.compatible = "allwinner,sun7i-a20-ahb-gates-clk", .data = &sun7i_a20_ahb_gates_data,}, - {.compatible = "allwinner,sun8i-a23-ahb1-gates-clk", .data = &sun8i_a23_ahb1_gates_data,}, - {.compatible = "allwinner,sun9i-a80-ahb0-gates-clk", .data = &sun9i_a80_ahb0_gates_data,}, - {.compatible = "allwinner,sun9i-a80-ahb1-gates-clk", .data = &sun9i_a80_ahb1_gates_data,}, - {.compatible = "allwinner,sun9i-a80-ahb2-gates-clk", .data = &sun9i_a80_ahb2_gates_data,}, - {.compatible = "allwinner,sun4i-a10-apb0-gates-clk", .data = &sun4i_apb0_gates_data,}, - {.compatible = "allwinner,sun5i-a10s-apb0-gates-clk", .data = &sun5i_a10s_apb0_gates_data,}, - {.compatible = "allwinner,sun5i-a13-apb0-gates-clk", .data = &sun5i_a13_apb0_gates_data,}, - {.compatible = "allwinner,sun7i-a20-apb0-gates-clk", .data = &sun7i_a20_apb0_gates_data,}, - {.compatible = "allwinner,sun9i-a80-apb0-gates-clk", .data = &sun9i_a80_apb0_gates_data,}, - {.compatible = "allwinner,sun4i-a10-apb1-gates-clk", .data = &sun4i_apb1_gates_data,}, - {.compatible = "allwinner,sun5i-a10s-apb1-gates-clk", .data = &sun5i_a10s_apb1_gates_data,}, - {.compatible = "allwinner,sun5i-a13-apb1-gates-clk", .data = &sun5i_a13_apb1_gates_data,}, - {.compatible = "allwinner,sun6i-a31-apb1-gates-clk", .data = &sun6i_a31_apb1_gates_data,}, - {.compatible = "allwinner,sun7i-a20-apb1-gates-clk", .data = &sun7i_a20_apb1_gates_data,}, - {.compatible = "allwinner,sun8i-a23-apb1-gates-clk", .data = &sun8i_a23_apb1_gates_data,}, - {.compatible = "allwinner,sun9i-a80-apb1-gates-clk", .data = &sun9i_a80_apb1_gates_data,}, - {.compatible = "allwinner,sun6i-a31-apb2-gates-clk", .data = &sun6i_a31_apb2_gates_data,}, - {.compatible = "allwinner,sun8i-a23-apb2-gates-clk", .data = &sun8i_a23_apb2_gates_data,}, - {} -}; static void __init of_sunxi_table_clock_setup(const struct of_device_id *clk_match, void *function) @@ -1336,9 +1164,6 @@ static void __init sunxi_init_clocks(const char *clocks[], int nclocks) /* Register mux clocks */ of_sunxi_table_clock_setup(clk_mux_match, sunxi_mux_clk_setup); - /* Register gate clocks */ - of_sunxi_table_clock_setup(clk_gates_match, sunxi_gates_clk_setup); - /* Protect the clocks that needs to stay on */ for (i = 0; i < nclocks; i++) { struct clk *clk = clk_get(NULL, clocks[i]); @@ -1350,7 +1175,6 @@ static void __init sunxi_init_clocks(const char *clocks[], int nclocks) static const char *sun4i_a10_critical_clocks[] __initdata = { "pll5_ddr", - "ahb_sdram", }; static void __init sun4i_a10_init_clocks(struct device_node *node) @@ -1363,7 +1187,6 @@ CLK_OF_DECLARE(sun4i_a10_clk_init, "allwinner,sun4i-a10", sun4i_a10_init_clocks) static const char *sun5i_critical_clocks[] __initdata = { "cpu", "pll5_ddr", - "ahb_sdram", }; static void __init sun5i_init_clocks(struct device_node *node) |