/* * 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> #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 void __init _of_ti_interface_clk_setup(struct device_node *node, const struct clk_hw_omap_ops *ops) { struct clk *clk; struct clk_init_data init = { NULL }; struct clk_hw_omap *clk_hw; const char *parent_name; u32 val; clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); if (!clk_hw) return; clk_hw->hw.init = &init; clk_hw->ops = ops; clk_hw->flags = MEMMAP_ADDRESSING; clk_hw->enable_reg = ti_clk_get_reg_addr(node, 0); if (!clk_hw->enable_reg) goto cleanup; if (!of_property_read_u32(node, "ti,bit-shift", &val)) clk_hw->enable_bit = val; init.name = node->name; init.ops = &ti_interface_clk_ops; init.flags = 0; parent_name = of_clk_get_parent_name(node, 0); if (!parent_name) { pr_err("%s must have a parent\n", node->name); goto cleanup; } init.num_parents = 1; init.parent_names = &parent_name; clk = clk_register(NULL, &clk_hw->hw); if (!IS_ERR(clk)) { of_clk_add_provider(node, of_clk_src_simple_get, clk); omap2_init_clk_hw_omap_clocks(clk); return; } cleanup: kfree(clk_hw); } 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_OMAP3 static 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_OMAP2430 static 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