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149 lines
4.2 KiB
149 lines
4.2 KiB
/* |
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* OMAP interface clock support |
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* |
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* Copyright (C) 2013 Texas Instruments, Inc. |
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* |
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* Tero Kristo <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <linux/clk-provider.h> |
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#include <linux/slab.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/clk/ti.h> |
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#include "clock.h" |
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#undef pr_fmt |
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#define pr_fmt(fmt) "%s: " fmt, __func__ |
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static const struct clk_ops ti_interface_clk_ops = { |
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.init = &omap2_init_clk_clkdm, |
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.enable = &omap2_dflt_clk_enable, |
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.disable = &omap2_dflt_clk_disable, |
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.is_enabled = &omap2_dflt_clk_is_enabled, |
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}; |
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static struct clk *_register_interface(struct device *dev, const char *name, |
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const char *parent_name, |
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struct clk_omap_reg *reg, u8 bit_idx, |
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const struct clk_hw_omap_ops *ops) |
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{ |
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struct clk_init_data init = { NULL }; |
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struct clk_hw_omap *clk_hw; |
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struct clk *clk; |
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clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); |
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if (!clk_hw) |
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return ERR_PTR(-ENOMEM); |
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clk_hw->hw.init = &init; |
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clk_hw->ops = ops; |
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memcpy(&clk_hw->enable_reg, reg, sizeof(*reg)); |
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clk_hw->enable_bit = bit_idx; |
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init.name = name; |
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init.ops = &ti_interface_clk_ops; |
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init.flags = 0; |
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init.num_parents = 1; |
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init.parent_names = &parent_name; |
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clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name); |
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if (IS_ERR(clk)) |
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kfree(clk_hw); |
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return clk; |
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} |
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static void __init _of_ti_interface_clk_setup(struct device_node *node, |
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const struct clk_hw_omap_ops *ops) |
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{ |
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struct clk *clk; |
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const char *parent_name; |
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struct clk_omap_reg reg; |
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u8 enable_bit = 0; |
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u32 val; |
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if (ti_clk_get_reg_addr(node, 0, ®)) |
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return; |
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if (!of_property_read_u32(node, "ti,bit-shift", &val)) |
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enable_bit = val; |
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parent_name = of_clk_get_parent_name(node, 0); |
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if (!parent_name) { |
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pr_err("%pOFn must have a parent\n", node); |
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return; |
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} |
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clk = _register_interface(NULL, node->name, parent_name, ®, |
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enable_bit, ops); |
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if (!IS_ERR(clk)) |
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of_clk_add_provider(node, of_clk_src_simple_get, clk); |
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} |
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static void __init of_ti_interface_clk_setup(struct device_node *node) |
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{ |
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_of_ti_interface_clk_setup(node, &clkhwops_iclk_wait); |
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} |
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CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock", |
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of_ti_interface_clk_setup); |
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static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node) |
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{ |
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_of_ti_interface_clk_setup(node, &clkhwops_iclk); |
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} |
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CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock", |
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of_ti_no_wait_interface_clk_setup); |
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#ifdef CONFIG_ARCH_OMAP3 |
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static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node) |
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{ |
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_of_ti_interface_clk_setup(node, |
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&clkhwops_omap3430es2_iclk_hsotgusb_wait); |
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} |
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CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock", |
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of_ti_hsotgusb_interface_clk_setup); |
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static void __init of_ti_dss_interface_clk_setup(struct device_node *node) |
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{ |
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_of_ti_interface_clk_setup(node, |
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&clkhwops_omap3430es2_iclk_dss_usbhost_wait); |
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} |
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CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock", |
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of_ti_dss_interface_clk_setup); |
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static void __init of_ti_ssi_interface_clk_setup(struct device_node *node) |
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{ |
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_of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait); |
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} |
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CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock", |
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of_ti_ssi_interface_clk_setup); |
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static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node) |
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{ |
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_of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait); |
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} |
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CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock", |
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of_ti_am35xx_interface_clk_setup); |
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#endif |
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#ifdef CONFIG_SOC_OMAP2430 |
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static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node) |
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{ |
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_of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait); |
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} |
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CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock", |
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of_ti_omap2430_interface_clk_setup); |
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#endif
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