diff options
Diffstat (limited to 'drivers/clk/ti/interface.c')
| -rw-r--r-- | drivers/clk/ti/interface.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/clk/ti/interface.c b/drivers/clk/ti/interface.c new file mode 100644 index 000000000..41ae70216 --- /dev/null +++ b/drivers/clk/ti/interface.c @@ -0,0 +1,151 @@ +/* + * 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; +} + +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, ®)) + 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, ®, + 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_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 |