diff options
author | Mike Turquette <mturquette@linaro.org> | 2014-07-25 17:45:30 -0700 |
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committer | Mike Turquette <mturquette@linaro.org> | 2014-07-25 17:45:30 -0700 |
commit | 3cc5aba4158e757ddd33751db6ca1729741e8dba (patch) | |
tree | 603de23aec889afde3080dbccd8090a0cba8ceff /drivers/clk/sunxi | |
parent | 9ae1400588a114be908bcf650aa57309c1a508ed (diff) | |
parent | 6c1d66f0da59362cb33ce37d436cd28c77c2b2cb (diff) | |
download | op-kernel-dev-3cc5aba4158e757ddd33751db6ca1729741e8dba.zip op-kernel-dev-3cc5aba4158e757ddd33751db6ca1729741e8dba.tar.gz |
Merge tag 'sunxi-clocks-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into clk-next-sunxi
Allwinner clocks additions for 3.17
This pull request adds support for the clocks found in the newly supported
Allwinner A23 clocks.
Diffstat (limited to 'drivers/clk/sunxi')
-rw-r--r-- | drivers/clk/sunxi/Makefile | 4 | ||||
-rw-r--r-- | drivers/clk/sunxi/clk-factors.c | 2 | ||||
-rw-r--r-- | drivers/clk/sunxi/clk-factors.h | 1 | ||||
-rw-r--r-- | drivers/clk/sunxi/clk-sun6i-apb0-gates.c | 76 | ||||
-rw-r--r-- | drivers/clk/sunxi/clk-sun8i-apb0.c | 68 | ||||
-rw-r--r-- | drivers/clk/sunxi/clk-sunxi.c | 119 |
6 files changed, 227 insertions, 43 deletions
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile index 762fd64..6850cba 100644 --- a/drivers/clk/sunxi/Makefile +++ b/drivers/clk/sunxi/Makefile @@ -6,4 +6,6 @@ obj-y += clk-sunxi.o clk-factors.o obj-y += clk-a10-hosc.o obj-y += clk-a20-gmac.o -obj-$(CONFIG_MFD_SUN6I_PRCM) += clk-sun6i-ar100.o clk-sun6i-apb0.o clk-sun6i-apb0-gates.o +obj-$(CONFIG_MFD_SUN6I_PRCM) += \ + clk-sun6i-ar100.o clk-sun6i-apb0.o clk-sun6i-apb0-gates.o \ + clk-sun8i-apb0.o diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c index 3806d97..2057c8a 100644 --- a/drivers/clk/sunxi/clk-factors.c +++ b/drivers/clk/sunxi/clk-factors.c @@ -62,7 +62,7 @@ static unsigned long clk_factors_recalc_rate(struct clk_hw *hw, p = FACTOR_GET(config->pshift, config->pwidth, reg); /* Calculate the rate */ - rate = (parent_rate * n * (k + 1) >> p) / (m + 1); + rate = (parent_rate * (n + config->n_start) * (k + 1) >> p) / (m + 1); return rate; } diff --git a/drivers/clk/sunxi/clk-factors.h b/drivers/clk/sunxi/clk-factors.h index 02e1a43..d2d0efa 100644 --- a/drivers/clk/sunxi/clk-factors.h +++ b/drivers/clk/sunxi/clk-factors.h @@ -15,6 +15,7 @@ struct clk_factors_config { u8 mwidth; u8 pshift; u8 pwidth; + u8 n_start; }; struct clk_factors { diff --git a/drivers/clk/sunxi/clk-sun6i-apb0-gates.c b/drivers/clk/sunxi/clk-sun6i-apb0-gates.c index 670f90d..ef5e419 100644 --- a/drivers/clk/sunxi/clk-sun6i-apb0-gates.c +++ b/drivers/clk/sunxi/clk-sun6i-apb0-gates.c @@ -9,23 +9,53 @@ */ #include <linux/clk-provider.h> +#include <linux/clkdev.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #define SUN6I_APB0_GATES_MAX_SIZE 32 +struct gates_data { + DECLARE_BITMAP(mask, SUN6I_APB0_GATES_MAX_SIZE); +}; + +static const struct gates_data sun6i_a31_apb0_gates __initconst = { + .mask = {0x7F}, +}; + +static const struct gates_data sun8i_a23_apb0_gates __initconst = { + .mask = {0x5D}, +}; + +const struct of_device_id sun6i_a31_apb0_gates_clk_dt_ids[] = { + { .compatible = "allwinner,sun6i-a31-apb0-gates-clk", .data = &sun6i_a31_apb0_gates }, + { .compatible = "allwinner,sun8i-a23-apb0-gates-clk", .data = &sun8i_a23_apb0_gates }, + { /* sentinel */ } +}; + static int sun6i_a31_apb0_gates_clk_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct clk_onecell_data *clk_data; + const struct of_device_id *device; + const struct gates_data *data; const char *clk_parent; const char *clk_name; struct resource *r; void __iomem *reg; - int gate_id; int ngates; int i; + int j = 0; + + if (!np) + return -ENODEV; + + device = of_match_device(sun6i_a31_apb0_gates_clk_dt_ids, &pdev->dev); + if (!device) + return -ENODEV; + data = device->data; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); reg = devm_ioremap_resource(&pdev->dev, r); @@ -36,54 +66,36 @@ static int sun6i_a31_apb0_gates_clk_probe(struct platform_device *pdev) if (!clk_parent) return -EINVAL; - ngates = of_property_count_strings(np, "clock-output-names"); - if (ngates < 0) - return ngates; - - if (!ngates || ngates > SUN6I_APB0_GATES_MAX_SIZE) - return -EINVAL; - clk_data = devm_kzalloc(&pdev->dev, sizeof(struct clk_onecell_data), GFP_KERNEL); if (!clk_data) return -ENOMEM; - clk_data->clks = devm_kzalloc(&pdev->dev, - SUN6I_APB0_GATES_MAX_SIZE * - sizeof(struct clk *), - GFP_KERNEL); + /* Worst-case size approximation and memory allocation */ + ngates = find_last_bit(data->mask, SUN6I_APB0_GATES_MAX_SIZE); + clk_data->clks = devm_kcalloc(&pdev->dev, (ngates + 1), + sizeof(struct clk *), GFP_KERNEL); if (!clk_data->clks) return -ENOMEM; - for (i = 0; i < ngates; i++) { + for_each_set_bit(i, data->mask, SUN6I_APB0_GATES_MAX_SIZE) { of_property_read_string_index(np, "clock-output-names", - i, &clk_name); + j, &clk_name); - gate_id = i; - of_property_read_u32_index(np, "clock-indices", i, &gate_id); + clk_data->clks[i] = clk_register_gate(&pdev->dev, clk_name, + clk_parent, 0, reg, i, + 0, NULL); + WARN_ON(IS_ERR(clk_data->clks[i])); + clk_register_clkdev(clk_data->clks[i], clk_name, NULL); - WARN_ON(gate_id >= SUN6I_APB0_GATES_MAX_SIZE); - if (gate_id >= SUN6I_APB0_GATES_MAX_SIZE) - continue; - - clk_data->clks[gate_id] = clk_register_gate(&pdev->dev, - clk_name, - clk_parent, 0, - reg, gate_id, - 0, NULL); - WARN_ON(IS_ERR(clk_data->clks[gate_id])); + j++; } - clk_data->clk_num = ngates; + clk_data->clk_num = ngates + 1; return of_clk_add_provider(np, of_clk_src_onecell_get, clk_data); } -const struct of_device_id sun6i_a31_apb0_gates_clk_dt_ids[] = { - { .compatible = "allwinner,sun6i-a31-apb0-gates-clk" }, - { /* sentinel */ } -}; - static struct platform_driver sun6i_a31_apb0_gates_clk_driver = { .driver = { .name = "sun6i-a31-apb0-gates-clk", diff --git a/drivers/clk/sunxi/clk-sun8i-apb0.c b/drivers/clk/sunxi/clk-sun8i-apb0.c new file mode 100644 index 0000000..196a499 --- /dev/null +++ b/drivers/clk/sunxi/clk-sun8i-apb0.c @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2014 Chen-Yu Tsai + * Author: Chen-Yu Tsai <wens@csie.org> + * + * Allwinner A23 APB0 clock driver + * + * License Terms: GNU General Public License v2 + * + * Based on clk-sun6i-apb0.c + * Allwinner A31 APB0 clock driver + * + * Copyright (C) 2014 Free Electrons + * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> + * + */ + +#include <linux/clk-provider.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +static int sun8i_a23_apb0_clk_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + const char *clk_name = np->name; + const char *clk_parent; + struct resource *r; + void __iomem *reg; + struct clk *clk; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + reg = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(reg)) + return PTR_ERR(reg); + + clk_parent = of_clk_get_parent_name(np, 0); + if (!clk_parent) + return -EINVAL; + + of_property_read_string(np, "clock-output-names", &clk_name); + + /* The A23 APB0 clock is a standard 2 bit wide divider clock */ + clk = clk_register_divider(&pdev->dev, clk_name, clk_parent, 0, reg, + 0, 2, CLK_DIVIDER_POWER_OF_TWO, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + return of_clk_add_provider(np, of_clk_src_simple_get, clk); +} + +const struct of_device_id sun8i_a23_apb0_clk_dt_ids[] = { + { .compatible = "allwinner,sun8i-a23-apb0-clk" }, + { /* sentinel */ } +}; + +static struct platform_driver sun8i_a23_apb0_clk_driver = { + .driver = { + .name = "sun8i-a23-apb0-clk", + .owner = THIS_MODULE, + .of_match_table = sun8i_a23_apb0_clk_dt_ids, + }, + .probe = sun8i_a23_apb0_clk_probe, +}; +module_platform_driver(sun8i_a23_apb0_clk_driver); + +MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>"); +MODULE_DESCRIPTION("Allwinner A23 APB0 clock Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index fb2ce84..8975972 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -164,6 +164,54 @@ static void sun6i_a31_get_pll1_factors(u32 *freq, u32 parent_rate, } /** + * sun8i_a23_get_pll1_factors() - calculates n, k, m, p factors for PLL1 + * PLL1 rate is calculated as follows + * rate = (parent_rate * (n + 1) * (k + 1) >> p) / (m + 1); + * parent_rate is always 24Mhz + */ + +static void sun8i_a23_get_pll1_factors(u32 *freq, u32 parent_rate, + u8 *n, u8 *k, u8 *m, u8 *p) +{ + u8 div; + + /* Normalize value to a 6M multiple */ + div = *freq / 6000000; + *freq = 6000000 * div; + + /* we were called to round the frequency, we can now return */ + if (n == NULL) + return; + + /* m is always zero for pll1 */ + *m = 0; + + /* k is 1 only on these cases */ + if (*freq >= 768000000 || *freq == 42000000 || *freq == 54000000) + *k = 1; + else + *k = 0; + + /* p will be 2 for divs under 20 and odd divs under 32 */ + if (div < 20 || (div < 32 && (div & 1))) + *p = 2; + + /* p will be 1 for even divs under 32, divs under 40 and odd pairs + * of divs between 40-62 */ + else if (div < 40 || (div < 64 && (div & 2))) + *p = 1; + + /* any other entries have p = 0 */ + else + *p = 0; + + /* calculate a suitable n based on k and p */ + div <<= *p; + div /= (*k + 1); + *n = div / 4 - 1; +} + +/** * sun4i_get_pll5_factors() - calculates n, k factors for PLL5 * PLL5 rate is calculated as follows * rate = parent_rate * n * (k + 1) @@ -422,6 +470,18 @@ static struct clk_factors_config sun6i_a31_pll1_config = { .mwidth = 2, }; +static struct clk_factors_config sun8i_a23_pll1_config = { + .nshift = 8, + .nwidth = 5, + .kshift = 4, + .kwidth = 2, + .mshift = 0, + .mwidth = 2, + .pshift = 16, + .pwidth = 2, + .n_start = 1, +}; + static struct clk_factors_config sun4i_pll5_config = { .nshift = 8, .nwidth = 5, @@ -471,6 +531,12 @@ static const struct factors_data sun6i_a31_pll1_data __initconst = { .getter = sun6i_a31_get_pll1_factors, }; +static const struct factors_data sun8i_a23_pll1_data __initconst = { + .enable = 31, + .table = &sun8i_a23_pll1_config, + .getter = sun8i_a23_get_pll1_factors, +}; + static const struct factors_data sun7i_a20_pll4_data __initconst = { .enable = 31, .table = &sun4i_pll5_config, @@ -664,6 +730,7 @@ struct div_data { u8 shift; u8 pow; u8 width; + const struct clk_div_table *table; }; static const struct div_data sun4i_axi_data __initconst = { @@ -672,6 +739,23 @@ static const struct div_data sun4i_axi_data __initconst = { .width = 2, }; +static const struct clk_div_table sun8i_a23_axi_table[] __initconst = { + { .val = 0, .div = 1 }, + { .val = 1, .div = 2 }, + { .val = 2, .div = 3 }, + { .val = 3, .div = 4 }, + { .val = 4, .div = 4 }, + { .val = 5, .div = 4 }, + { .val = 6, .div = 4 }, + { .val = 7, .div = 4 }, + { } /* sentinel */ +}; + +static const struct div_data sun8i_a23_axi_data __initconst = { + .width = 3, + .table = sun8i_a23_axi_table, +}; + static const struct div_data sun4i_ahb_data __initconst = { .shift = 4, .pow = 1, @@ -704,10 +788,10 @@ static void __init sunxi_divider_clk_setup(struct device_node *node, of_property_read_string(node, "clock-output-names", &clk_name); - clk = clk_register_divider(NULL, clk_name, clk_parent, 0, - reg, data->shift, data->width, - data->pow ? CLK_DIVIDER_POWER_OF_TWO : 0, - &clk_lock); + clk = clk_register_divider_table(NULL, clk_name, clk_parent, 0, + reg, data->shift, data->width, + data->pow ? CLK_DIVIDER_POWER_OF_TWO : 0, + data->table, &clk_lock); if (clk) { of_clk_add_provider(node, of_clk_src_simple_get, clk); clk_register_clkdev(clk, clk_name, NULL); @@ -804,6 +888,10 @@ 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 sun4i_apb0_gates_data __initconst = { .mask = {0x4EF}, }; @@ -836,6 +924,10 @@ 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}, }; @@ -844,6 +936,10 @@ static const struct gates_data sun7i_a20_apb1_gates_data __initconst = { .mask = { 0xff80ff }, }; +static const struct gates_data sun8i_a23_apb2_gates_data __initconst = { + .mask = {0x1F0007}, +}; + static const struct gates_data sun4i_a10_usb_gates_data __initconst = { .mask = {0x1C0}, .reset_mask = 0x07, @@ -870,7 +966,6 @@ static void __init sunxi_gates_clk_setup(struct device_node *node, int qty; int i = 0; int j = 0; - int ignore; reg = of_iomap(node, 0); @@ -891,14 +986,12 @@ static void __init sunxi_gates_clk_setup(struct device_node *node, of_property_read_string_index(node, "clock-output-names", j, &clk_name); - /* No driver claims this clock, but it should remain gated */ - ignore = !strcmp("ahb_sdram", clk_name) ? CLK_IGNORE_UNUSED : 0; - clk_data->clks[i] = clk_register_gate(NULL, clk_name, - clk_parent, ignore, + 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++; } @@ -1102,6 +1195,7 @@ free_clkdata: static const struct of_device_id clk_factors_match[] __initconst = { {.compatible = "allwinner,sun4i-a10-pll1-clk", .data = &sun4i_pll1_data,}, {.compatible = "allwinner,sun6i-a31-pll1-clk", .data = &sun6i_a31_pll1_data,}, + {.compatible = "allwinner,sun8i-a23-pll1-clk", .data = &sun8i_a23_pll1_data,}, {.compatible = "allwinner,sun7i-a20-pll4-clk", .data = &sun7i_a20_pll4_data,}, {.compatible = "allwinner,sun6i-a31-pll6-clk", .data = &sun6i_a31_pll6_data,}, {.compatible = "allwinner,sun4i-a10-apb1-clk", .data = &sun4i_apb1_data,}, @@ -1113,6 +1207,7 @@ static const struct of_device_id clk_factors_match[] __initconst = { /* Matches for divider clocks */ static const struct of_device_id clk_div_match[] __initconst = { {.compatible = "allwinner,sun4i-a10-axi-clk", .data = &sun4i_axi_data,}, + {.compatible = "allwinner,sun8i-a23-axi-clk", .data = &sun8i_a23_axi_data,}, {.compatible = "allwinner,sun4i-a10-ahb-clk", .data = &sun4i_ahb_data,}, {.compatible = "allwinner,sun4i-a10-apb0-clk", .data = &sun4i_apb0_data,}, {.compatible = "allwinner,sun6i-a31-apb2-div-clk", .data = &sun6i_a31_apb2_div_data,}, @@ -1142,6 +1237,7 @@ static const struct of_device_id clk_gates_match[] __initconst = { {.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,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,}, @@ -1151,7 +1247,9 @@ static const struct of_device_id clk_gates_match[] __initconst = { {.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,sun6i-a31-apb2-gates-clk", .data = &sun6i_a31_apb2_gates_data,}, + {.compatible = "allwinner,sun8i-a23-apb2-gates-clk", .data = &sun8i_a23_apb2_gates_data,}, {.compatible = "allwinner,sun4i-a10-usb-clk", .data = &sun4i_a10_usb_gates_data,}, {.compatible = "allwinner,sun5i-a13-usb-clk", .data = &sun5i_a13_usb_gates_data,}, {.compatible = "allwinner,sun6i-a31-usb-clk", .data = &sun6i_a31_usb_gates_data,}, @@ -1202,6 +1300,7 @@ 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) @@ -1214,6 +1313,7 @@ CLK_OF_DECLARE(sun4i_a10_clk_init, "allwinner,sun4i-a10", sun4i_a10_init_clocks) static const char *sun5i_critical_clocks[] __initdata = { "mbus", "pll5_ddr", + "ahb_sdram", }; static void __init sun5i_init_clocks(struct device_node *node) @@ -1236,3 +1336,4 @@ static void __init sun6i_init_clocks(struct device_node *node) ARRAY_SIZE(sun6i_critical_clocks)); } CLK_OF_DECLARE(sun6i_a31_clk_init, "allwinner,sun6i-a31", sun6i_init_clocks); +CLK_OF_DECLARE(sun8i_a23_clk_init, "allwinner,sun8i-a23", sun6i_init_clocks); |