/* * OMAP interface clock support * * Copyright (C) 2013 Texas Instruments, Inc. * * Tero Kristo <t-kristo@ti.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any * kind, whether express or implied; 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/slab.h>#include <linux/of.h>#include <linux/of_address.h>#include <linux/clk/ti.h>#include "clock.h" #undef pr_fmt#define pr_fmt(fmt) "%s: " fmt, __func__ static const struct clk_ops ti_interface_clk_ops = {	.init		= &omap2_init_clk_clkdm,	.enable		= &omap2_dflt_clk_enable,	.disable	= &omap2_dflt_clk_disable,	.is_enabled	= &omap2_dflt_clk_is_enabled,}; static struct clk *_register_interface(struct device *dev, const char *name,				       const char *parent_name,				       struct clk_omap_reg *reg, u8 bit_idx,				       const struct clk_hw_omap_ops *ops){	struct clk_init_data init = { NULL };	struct clk_hw_omap *clk_hw;	struct clk *clk; 	clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);	if (!clk_hw)		return ERR_PTR(-ENOMEM); 	clk_hw->hw.init = &init;	clk_hw->ops = ops;	memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));	clk_hw->enable_bit = bit_idx; 	init.name = name;	init.ops = &ti_interface_clk_ops;	init.flags = 0; 	init.num_parents = 1;	init.parent_names = &parent_name; 	clk = ti_clk_register(NULL, &clk_hw->hw, name); 	if (IS_ERR(clk))		kfree(clk_hw);	else		omap2_init_clk_hw_omap_clocks(&clk_hw->hw); 	return clk;} #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS)struct clk *ti_clk_register_interface(struct ti_clk *setup){	const struct clk_hw_omap_ops *ops = &clkhwops_iclk_wait;	struct clk_omap_reg reg;	struct ti_clk_gate *gate; 	gate = setup->data;	reg.index = gate->module;	reg.offset = gate->reg;	reg.ptr = NULL; 	if (gate->flags & CLKF_NO_WAIT)		ops = &clkhwops_iclk; 	if (gate->flags & CLKF_HSOTGUSB)		ops = &clkhwops_omap3430es2_iclk_hsotgusb_wait; 	if (gate->flags & CLKF_DSS)		ops = &clkhwops_omap3430es2_iclk_dss_usbhost_wait; 	if (gate->flags & CLKF_SSI)		ops = &clkhwops_omap3430es2_iclk_ssi_wait; 	if (gate->flags & CLKF_AM35XX)		ops = &clkhwops_am35xx_ipss_wait; 	return _register_interface(NULL, setup->name, gate->parent,				   &reg, gate->bit_shift, ops);}#endif static void __init _of_ti_interface_clk_setup(struct device_node *node,					      const struct clk_hw_omap_ops *ops){	struct clk *clk;	const char *parent_name;	struct clk_omap_reg reg;	u8 enable_bit = 0;	u32 val; 	if (ti_clk_get_reg_addr(node, 0, &reg))		return; 	if (!of_property_read_u32(node, "ti,bit-shift", &val))		enable_bit = val; 	parent_name = of_clk_get_parent_name(node, 0);	if (!parent_name) {		pr_err("%s must have a parent\n", node->name);		return;	} 	clk = _register_interface(NULL, node->name, parent_name, &reg,				  enable_bit, ops); 	if (!IS_ERR(clk))		of_clk_add_provider(node, of_clk_src_simple_get, clk);} static void __init of_ti_interface_clk_setup(struct device_node *node){	_of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);}CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",	       of_ti_interface_clk_setup); static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node){	_of_ti_interface_clk_setup(node, &clkhwops_iclk);}CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",	       of_ti_no_wait_interface_clk_setup); #ifdef CONFIG_ARCH_OMAP3static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node){	_of_ti_interface_clk_setup(node,				   &clkhwops_omap3430es2_iclk_hsotgusb_wait);}CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",	       of_ti_hsotgusb_interface_clk_setup); static void __init of_ti_dss_interface_clk_setup(struct device_node *node){	_of_ti_interface_clk_setup(node,				   &clkhwops_omap3430es2_iclk_dss_usbhost_wait);}CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",	       of_ti_dss_interface_clk_setup); static void __init of_ti_ssi_interface_clk_setup(struct device_node *node){	_of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);}CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",	       of_ti_ssi_interface_clk_setup); static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node){	_of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);}CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",	       of_ti_am35xx_interface_clk_setup);#endif #ifdef CONFIG_SOC_OMAP2430static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node){	_of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);}CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",	       of_ti_omap2430_interface_clk_setup);#endif