diff options
Diffstat (limited to 'drivers/clk/ti/gate.c')
| -rw-r--r-- | drivers/clk/ti/gate.c | 163 |
1 files changed, 133 insertions, 30 deletions
diff --git a/drivers/clk/ti/gate.c b/drivers/clk/ti/gate.c index b326d2797feb..d493307b73f4 100644 --- a/drivers/clk/ti/gate.c +++ b/drivers/clk/ti/gate.c @@ -22,6 +22,8 @@ #include <linux/of_address.h> #include <linux/clk/ti.h> +#include "clock.h" + #define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw) #undef pr_fmt @@ -90,63 +92,164 @@ static int omap36xx_gate_clk_enable_with_hsdiv_restore(struct clk_hw *clk) return ret; } -static void __init _of_ti_gate_clk_setup(struct device_node *node, - const struct clk_ops *ops, - const struct clk_hw_omap_ops *hw_ops) +static struct clk *_register_gate(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + void __iomem *reg, u8 bit_idx, + u8 clk_gate_flags, const struct clk_ops *ops, + const struct clk_hw_omap_ops *hw_ops) { - struct clk *clk; struct clk_init_data init = { NULL }; struct clk_hw_omap *clk_hw; - const char *clk_name = node->name; - const char *parent_name; - u32 val; + struct clk *clk; clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); if (!clk_hw) - return; + return ERR_PTR(-ENOMEM); clk_hw->hw.init = &init; - init.name = clk_name; + init.name = name; init.ops = ops; - if (ops != &omap_gate_clkdm_clk_ops) { - clk_hw->enable_reg = ti_clk_get_reg_addr(node, 0); - if (!clk_hw->enable_reg) - goto cleanup; + clk_hw->enable_reg = reg; + clk_hw->enable_bit = bit_idx; + clk_hw->ops = hw_ops; - if (!of_property_read_u32(node, "ti,bit-shift", &val)) - clk_hw->enable_bit = val; + clk_hw->flags = MEMMAP_ADDRESSING | clk_gate_flags; + + init.parent_names = &parent_name; + init.num_parents = 1; + + init.flags = flags; + + clk = clk_register(NULL, &clk_hw->hw); + + if (IS_ERR(clk)) + kfree(clk_hw); + + return clk; +} + +#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS) +struct clk *ti_clk_register_gate(struct ti_clk *setup) +{ + const struct clk_ops *ops = &omap_gate_clk_ops; + const struct clk_hw_omap_ops *hw_ops = NULL; + u32 reg; + struct clk_omap_reg *reg_setup; + u32 flags = 0; + u8 clk_gate_flags = 0; + struct ti_clk_gate *gate; + + gate = setup->data; + + if (gate->flags & CLKF_INTERFACE) + return ti_clk_register_interface(setup); + + reg_setup = (struct clk_omap_reg *)® + + if (gate->flags & CLKF_SET_RATE_PARENT) + flags |= CLK_SET_RATE_PARENT; + + if (gate->flags & CLKF_SET_BIT_TO_DISABLE) + clk_gate_flags |= INVERT_ENABLE; + + if (gate->flags & CLKF_HSDIV) { + ops = &omap_gate_clk_hsdiv_restore_ops; + hw_ops = &clkhwops_wait; } - clk_hw->ops = hw_ops; + if (gate->flags & CLKF_DSS) + hw_ops = &clkhwops_omap3430es2_dss_usbhost_wait; + + if (gate->flags & CLKF_WAIT) + hw_ops = &clkhwops_wait; + + if (gate->flags & CLKF_CLKDM) + ops = &omap_gate_clkdm_clk_ops; + + if (gate->flags & CLKF_AM35XX) + hw_ops = &clkhwops_am35xx_ipss_module_wait; - clk_hw->flags = MEMMAP_ADDRESSING; + reg_setup->index = gate->module; + reg_setup->offset = gate->reg; + + return _register_gate(NULL, setup->name, gate->parent, flags, + (void __iomem *)reg, gate->bit_shift, + clk_gate_flags, ops, hw_ops); +} + +struct clk_hw *ti_clk_build_component_gate(struct ti_clk_gate *setup) +{ + struct clk_hw_omap *gate; + struct clk_omap_reg *reg; + const struct clk_hw_omap_ops *ops = &clkhwops_wait; + + if (!setup) + return NULL; + + gate = kzalloc(sizeof(*gate), GFP_KERNEL); + if (!gate) + return ERR_PTR(-ENOMEM); + + reg = (struct clk_omap_reg *)&gate->enable_reg; + reg->index = setup->module; + reg->offset = setup->reg; + + gate->enable_bit = setup->bit_shift; + + if (setup->flags & CLKF_NO_WAIT) + ops = NULL; + + if (setup->flags & CLKF_INTERFACE) + ops = &clkhwops_iclk_wait; + + gate->ops = ops; + gate->flags = MEMMAP_ADDRESSING; + + return &gate->hw; +} +#endif + +static void __init _of_ti_gate_clk_setup(struct device_node *node, + const struct clk_ops *ops, + const struct clk_hw_omap_ops *hw_ops) +{ + struct clk *clk; + const char *parent_name; + void __iomem *reg = NULL; + u8 enable_bit = 0; + u32 val; + u32 flags = 0; + u8 clk_gate_flags = 0; + + if (ops != &omap_gate_clkdm_clk_ops) { + reg = ti_clk_get_reg_addr(node, 0); + if (!reg) + return; + + if (!of_property_read_u32(node, "ti,bit-shift", &val)) + enable_bit = val; + } if (of_clk_get_parent_count(node) != 1) { - pr_err("%s must have 1 parent\n", clk_name); - goto cleanup; + pr_err("%s must have 1 parent\n", node->name); + return; } parent_name = of_clk_get_parent_name(node, 0); - init.parent_names = &parent_name; - init.num_parents = 1; if (of_property_read_bool(node, "ti,set-rate-parent")) - init.flags |= CLK_SET_RATE_PARENT; + flags |= CLK_SET_RATE_PARENT; if (of_property_read_bool(node, "ti,set-bit-to-disable")) - clk_hw->flags |= INVERT_ENABLE; + clk_gate_flags |= INVERT_ENABLE; - clk = clk_register(NULL, &clk_hw->hw); + clk = _register_gate(NULL, node->name, parent_name, flags, reg, + enable_bit, clk_gate_flags, ops, hw_ops); - if (!IS_ERR(clk)) { + if (!IS_ERR(clk)) of_clk_add_provider(node, of_clk_src_simple_get, clk); - return; - } - -cleanup: - kfree(clk_hw); } static void __init |