ead478250b
Add a generic API for initializing clocks of clk_hw_omap type clocks, and convert the whole TI clock driver suite to use this for registering the clocks. Also, get rid of the now redundant API for adding the clocks to the OMAP HW clocks list; instead this is used directly from the register API. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Tested-by: Keerthy <j-keerthy@ti.com>
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*
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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 <t-kristo@ti.com>
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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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