[PATCH 06/11] clk: ti: dpll: add support for legacy DPLL init
Tero Kristo
t-kristo at ti.com
Tue Dec 16 08:20:51 PST 2014
Legacy clock data is initialized slightly differently compared to
DT clocks, thus add support for this.
Signed-off-by: Tero Kristo <t-kristo at ti.com>
---
drivers/clk/ti/clk.c | 3 ++
drivers/clk/ti/clock.h | 1 +
drivers/clk/ti/dpll.c | 118 +++++++++++++++++++++++++++++++++++++++++++-----
3 files changed, 111 insertions(+), 11 deletions(-)
diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index a0475e2..f41a757 100644
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c
@@ -228,6 +228,9 @@ struct clk __init *ti_clk_register_clk(struct ti_clk *setup)
case TI_CLK_GATE:
clk = ti_clk_register_gate(setup);
break;
+ case TI_CLK_DPLL:
+ clk = ti_clk_register_dpll(setup);
+ break;
default:
pr_err("bad type for %s!\n", setup->name);
clk = ERR_PTR(-EINVAL);
diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h
index fe70941..f4e8eb2 100644
--- a/drivers/clk/ti/clock.h
+++ b/drivers/clk/ti/clock.h
@@ -157,6 +157,7 @@ struct clk *ti_clk_register_gate(struct ti_clk *setup);
struct clk *ti_clk_register_interface(struct ti_clk *setup);
struct clk *ti_clk_register_mux(struct ti_clk *setup);
struct clk *ti_clk_register_divider(struct ti_clk *setup);
+struct clk *ti_clk_register_dpll(struct ti_clk *setup);
struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup);
struct clk_hw *ti_clk_build_component_gate(struct ti_clk_gate *setup);
diff --git a/drivers/clk/ti/dpll.c b/drivers/clk/ti/dpll.c
index 79791e1..0693b8b 100644
--- a/drivers/clk/ti/dpll.c
+++ b/drivers/clk/ti/dpll.c
@@ -21,6 +21,7 @@
#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__
@@ -115,7 +116,7 @@ static const struct clk_ops dpll_x2_ck_ops = {
};
/**
- * ti_clk_register_dpll - low level registration of a DPLL clock
+ * _register_dpll - low level registration of a DPLL clock
* @hw: hardware clock definition for the clock
* @node: device node for the clock
*
@@ -123,8 +124,8 @@ static const struct clk_ops dpll_x2_ck_ops = {
* clk-bypass is missing), the clock is added to retry list and
* the initialization is retried on later stage.
*/
-static void __init ti_clk_register_dpll(struct clk_hw *hw,
- struct device_node *node)
+static void __init _register_dpll(struct clk_hw *hw,
+ struct device_node *node)
{
struct clk_hw_omap *clk_hw = to_clk_hw_omap(hw);
struct dpll_data *dd = clk_hw->dpll_data;
@@ -136,7 +137,7 @@ static void __init ti_clk_register_dpll(struct clk_hw *hw,
if (IS_ERR(dd->clk_ref) || IS_ERR(dd->clk_bypass)) {
pr_debug("clk-ref or clk-bypass missing for %s, retry later\n",
node->name);
- if (!ti_clk_retry_init(node, hw, ti_clk_register_dpll))
+ if (!ti_clk_retry_init(node, hw, _register_dpll))
return;
goto cleanup;
@@ -160,20 +161,115 @@ cleanup:
kfree(clk_hw);
}
+void __iomem *_get_reg(u8 module, u16 offset)
+{
+ u32 reg;
+ struct clk_omap_reg *reg_setup;
+
+ reg_setup = (struct clk_omap_reg *)®
+
+ reg_setup->index = module;
+ reg_setup->offset = offset;
+
+ return (void __iomem *)reg;
+}
+
+struct clk *ti_clk_register_dpll(struct ti_clk *setup)
+{
+ struct clk_hw_omap *clk_hw;
+ struct clk_init_data init = { NULL };
+ struct dpll_data *dd;
+ struct clk *clk;
+ struct ti_clk_dpll *dpll;
+ const struct clk_ops *ops = &omap3_dpll_ck_ops;
+ struct clk *clk_ref;
+ struct clk *clk_bypass;
+
+ dpll = setup->data;
+
+ if (dpll->num_parents < 2)
+ return ERR_PTR(-EINVAL);
+
+ clk_ref = clk_get_sys(NULL, dpll->parents[0]);
+ clk_bypass = clk_get_sys(NULL, dpll->parents[1]);
+
+ if (IS_ERR_OR_NULL(clk_ref) || IS_ERR_OR_NULL(clk_bypass))
+ return ERR_PTR(-EAGAIN);
+
+ dd = kzalloc(sizeof(*dd), GFP_KERNEL);
+ clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
+ if (!dd || !clk_hw) {
+ clk = ERR_PTR(-ENOMEM);
+ goto cleanup;
+ }
+
+ clk_hw->dpll_data = dd;
+ clk_hw->ops = &clkhwops_omap3_dpll;
+ clk_hw->hw.init = &init;
+ clk_hw->flags = MEMMAP_ADDRESSING;
+
+ init.name = setup->name;
+ init.ops = ops;
+
+ init.num_parents = dpll->num_parents;
+ init.parent_names = dpll->parents;
+
+ dd->control_reg = _get_reg(dpll->module, dpll->control_reg);
+ dd->idlest_reg = _get_reg(dpll->module, dpll->idlest_reg);
+ dd->mult_div1_reg = _get_reg(dpll->module, dpll->mult_div1_reg);
+ dd->autoidle_reg = _get_reg(dpll->module, dpll->autoidle_reg);
+
+ dd->modes = dpll->modes;
+ dd->div1_mask = dpll->div1_mask;
+ dd->idlest_mask = dpll->idlest_mask;
+ dd->mult_mask = dpll->mult_mask;
+ dd->autoidle_mask = dpll->autoidle_mask;
+ dd->enable_mask = dpll->enable_mask;
+ dd->sddiv_mask = dpll->sddiv_mask;
+ dd->dco_mask = dpll->dco_mask;
+ dd->max_divider = dpll->max_divider;
+ dd->max_multiplier = dpll->max_multiplier;
+ dd->auto_recal_bit = dpll->auto_recal_bit;
+ dd->recal_en_bit = dpll->recal_en_bit;
+ dd->recal_st_bit = dpll->recal_st_bit;
+
+ dd->clk_ref = clk_ref;
+ dd->clk_bypass = clk_bypass;
+
+ if (dpll->flags & CLKF_CORE)
+ ops = &omap3_dpll_core_ck_ops;
+
+ if (dpll->flags & CLKF_PER)
+ ops = &omap3_dpll_per_ck_ops;
+
+ if (dpll->flags & CLKF_J_TYPE)
+ dd->flags |= DPLL_J_TYPE;
+
+ clk = clk_register(NULL, &clk_hw->hw);
+
+ if (!IS_ERR(clk))
+ return clk;
+
+cleanup:
+ kfree(dd);
+ kfree(clk_hw);
+ return clk;
+}
+
#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
defined(CONFIG_SOC_DRA7XX) || defined(CONFIG_SOC_AM33XX) || \
defined(CONFIG_SOC_AM43XX)
/**
- * ti_clk_register_dpll_x2 - Registers a DPLLx2 clock
+ * _register_dpll_x2 - Registers a DPLLx2 clock
* @node: device node for this clock
* @ops: clk_ops for this clock
* @hw_ops: clk_hw_ops for this clock
*
* Initializes a DPLL x 2 clock from device tree data.
*/
-static void ti_clk_register_dpll_x2(struct device_node *node,
- const struct clk_ops *ops,
- const struct clk_hw_omap_ops *hw_ops)
+static void _register_dpll_x2(struct device_node *node,
+ const struct clk_ops *ops,
+ const struct clk_hw_omap_ops *hw_ops)
{
struct clk *clk;
struct clk_init_data init = { NULL };
@@ -303,7 +399,7 @@ static void __init of_ti_dpll_setup(struct device_node *node,
if (dpll_mode)
dd->modes = dpll_mode;
- ti_clk_register_dpll(&clk_hw->hw, node);
+ _register_dpll(&clk_hw->hw, node);
return;
cleanup:
@@ -317,7 +413,7 @@ cleanup:
defined(CONFIG_SOC_DRA7XX)
static void __init of_ti_omap4_dpll_x2_setup(struct device_node *node)
{
- ti_clk_register_dpll_x2(node, &dpll_x2_ck_ops, &clkhwops_omap4_dpllmx);
+ _register_dpll_x2(node, &dpll_x2_ck_ops, &clkhwops_omap4_dpllmx);
}
CLK_OF_DECLARE(ti_omap4_dpll_x2_clock, "ti,omap4-dpll-x2-clock",
of_ti_omap4_dpll_x2_setup);
@@ -326,7 +422,7 @@ CLK_OF_DECLARE(ti_omap4_dpll_x2_clock, "ti,omap4-dpll-x2-clock",
#if defined(CONFIG_SOC_AM33XX) || defined(CONFIG_SOC_AM43XX)
static void __init of_ti_am3_dpll_x2_setup(struct device_node *node)
{
- ti_clk_register_dpll_x2(node, &dpll_x2_ck_ops, NULL);
+ _register_dpll_x2(node, &dpll_x2_ck_ops, NULL);
}
CLK_OF_DECLARE(ti_am3_dpll_x2_clock, "ti,am3-dpll-x2-clock",
of_ti_am3_dpll_x2_setup);
--
1.7.9.5
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