[PATCHv2 17/27] clk: ti: dflt: move support for default gate clock to clock driver
Tero Kristo
t-kristo at ti.com
Mon May 11 01:54:43 PDT 2015
With the legacy support gone, OMAP2+ default gate clock can be moved
under clock driver. Create a new file for the purpose, and clean-up
the header exports a bit as some clock APIs are no longer needed
outside clock driver itself.
Signed-off-by: Tero Kristo <t-kristo at ti.com>
---
arch/arm/mach-omap2/clock.c | 273 -------------------------------------
drivers/clk/ti/Makefile | 3 +-
drivers/clk/ti/clkt_dflt.c | 316 +++++++++++++++++++++++++++++++++++++++++++
drivers/clk/ti/clock.h | 5 +
include/linux/clk/ti.h | 4 -
5 files changed, 323 insertions(+), 278 deletions(-)
create mode 100644 drivers/clk/ti/clkt_dflt.c
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 6c17adf..38a336b 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -40,12 +40,6 @@
#include "cm-regbits-34xx.h"
#include "common.h"
-/*
- * MAX_MODULE_ENABLE_WAIT: maximum of number of microseconds to wait
- * for a module to indicate that it is no longer in idle
- */
-#define MAX_MODULE_ENABLE_WAIT 100000
-
u16 cpu_mask;
/* DPLL valid Fint frequency band limits - from 34xx TRM Section 4.7.6.2 */
@@ -176,77 +170,6 @@ void __init omap2_clk_legacy_provider_init(int index, void __iomem *mem)
/* Private functions */
-
-/**
- * _wait_idlest_generic - wait for a module to leave the idle state
- * @clk: module clock to wait for (needed for register offsets)
- * @reg: virtual address of module IDLEST register
- * @mask: value to mask against to determine if the module is active
- * @idlest: idle state indicator (0 or 1) for the clock
- * @name: name of the clock (for printk)
- *
- * Wait for a module to leave idle, where its idle-status register is
- * not inside the CM module. Returns 1 if the module left idle
- * promptly, or 0 if the module did not leave idle before the timeout
- * elapsed. XXX Deprecated - should be moved into drivers for the
- * individual IP block that the IDLEST register exists in.
- */
-static int _wait_idlest_generic(struct clk_hw_omap *clk, void __iomem *reg,
- u32 mask, u8 idlest, const char *name)
-{
- int i = 0, ena = 0;
-
- ena = (idlest) ? 0 : mask;
-
- omap_test_timeout(((omap2_clk_readl(clk, reg) & mask) == ena),
- MAX_MODULE_ENABLE_WAIT, i);
-
- if (i < MAX_MODULE_ENABLE_WAIT)
- pr_debug("omap clock: module associated with clock %s ready after %d loops\n",
- name, i);
- else
- pr_err("omap clock: module associated with clock %s didn't enable in %d tries\n",
- name, MAX_MODULE_ENABLE_WAIT);
-
- return (i < MAX_MODULE_ENABLE_WAIT) ? 1 : 0;
-};
-
-/**
- * _omap2_module_wait_ready - wait for an OMAP module to leave IDLE
- * @clk: struct clk * belonging to the module
- *
- * If the necessary clocks for the OMAP hardware IP block that
- * corresponds to clock @clk are enabled, then wait for the module to
- * indicate readiness (i.e., to leave IDLE). This code does not
- * belong in the clock code and will be moved in the medium term to
- * module-dependent code. No return value.
- */
-static void _omap2_module_wait_ready(struct clk_hw_omap *clk)
-{
- void __iomem *companion_reg, *idlest_reg;
- u8 other_bit, idlest_bit, idlest_val, idlest_reg_id;
- s16 prcm_mod;
- int r;
-
- /* Not all modules have multiple clocks that their IDLEST depends on */
- if (clk->ops->find_companion) {
- clk->ops->find_companion(clk, &companion_reg, &other_bit);
- if (!(omap2_clk_readl(clk, companion_reg) & (1 << other_bit)))
- return;
- }
-
- clk->ops->find_idlest(clk, &idlest_reg, &idlest_bit, &idlest_val);
- r = cm_split_idlest_reg(idlest_reg, &prcm_mod, &idlest_reg_id);
- if (r) {
- /* IDLEST register not in the CM module */
- _wait_idlest_generic(clk, idlest_reg, (1 << idlest_bit),
- idlest_val, __clk_get_name(clk->hw.clk));
- } else {
- omap_cm_wait_module_ready(0, prcm_mod, idlest_reg_id,
- idlest_bit);
- };
-}
-
/* Public functions */
/**
@@ -280,174 +203,6 @@ void omap2_init_clk_clkdm(struct clk_hw *hw)
}
/**
- * omap2_clk_dflt_find_companion - find companion clock to @clk
- * @clk: struct clk * to find the companion clock of
- * @other_reg: void __iomem ** to return the companion clock CM_*CLKEN va in
- * @other_bit: u8 ** to return the companion clock bit shift in
- *
- * Note: We don't need special code here for INVERT_ENABLE for the
- * time being since INVERT_ENABLE only applies to clocks enabled by
- * CM_CLKEN_PLL
- *
- * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes it's
- * just a matter of XORing the bits.
- *
- * Some clocks don't have companion clocks. For example, modules with
- * only an interface clock (such as MAILBOXES) don't have a companion
- * clock. Right now, this code relies on the hardware exporting a bit
- * in the correct companion register that indicates that the
- * nonexistent 'companion clock' is active. Future patches will
- * associate this type of code with per-module data structures to
- * avoid this issue, and remove the casts. No return value.
- */
-void omap2_clk_dflt_find_companion(struct clk_hw_omap *clk,
- void __iomem **other_reg, u8 *other_bit)
-{
- u32 r;
-
- /*
- * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes
- * it's just a matter of XORing the bits.
- */
- r = ((__force u32)clk->enable_reg ^ (CM_FCLKEN ^ CM_ICLKEN));
-
- *other_reg = (__force void __iomem *)r;
- *other_bit = clk->enable_bit;
-}
-
-/**
- * omap2_clk_dflt_find_idlest - find CM_IDLEST reg va, bit shift for @clk
- * @clk: struct clk * to find IDLEST info for
- * @idlest_reg: void __iomem ** to return the CM_IDLEST va in
- * @idlest_bit: u8 * to return the CM_IDLEST bit shift in
- * @idlest_val: u8 * to return the idle status indicator
- *
- * Return the CM_IDLEST register address and bit shift corresponding
- * to the module that "owns" this clock. This default code assumes
- * that the CM_IDLEST bit shift is the CM_*CLKEN bit shift, and that
- * the IDLEST register address ID corresponds to the CM_*CLKEN
- * register address ID (e.g., that CM_FCLKEN2 corresponds to
- * CM_IDLEST2). This is not true for all modules. No return value.
- */
-void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
- void __iomem **idlest_reg, u8 *idlest_bit, u8 *idlest_val)
-{
- u32 r;
-
- r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
- *idlest_reg = (__force void __iomem *)r;
- *idlest_bit = clk->enable_bit;
-
- /*
- * 24xx uses 0 to indicate not ready, and 1 to indicate ready.
- * 34xx reverses this, just to keep us on our toes
- * AM35xx uses both, depending on the module.
- */
- *idlest_val = ti_clk_get_features()->cm_idlest_val;
-}
-
-/**
- * omap2_dflt_clk_enable - enable a clock in the hardware
- * @hw: struct clk_hw * of the clock to enable
- *
- * Enable the clock @hw in the hardware. We first call into the OMAP
- * clockdomain code to "enable" the corresponding clockdomain if this
- * is the first enabled user of the clockdomain. Then program the
- * hardware to enable the clock. Then wait for the IP block that uses
- * this clock to leave idle (if applicable). Returns the error value
- * from clkdm_clk_enable() if it terminated with an error, or -EINVAL
- * if @hw has a null clock enable_reg, or zero upon success.
- */
-int omap2_dflt_clk_enable(struct clk_hw *hw)
-{
- struct clk_hw_omap *clk;
- u32 v;
- int ret = 0;
- bool clkdm_control;
-
- if (ti_clk_get_features()->flags & TI_CLK_DISABLE_CLKDM_CONTROL)
- clkdm_control = false;
- else
- clkdm_control = true;
-
- clk = to_clk_hw_omap(hw);
-
- if (clkdm_control && clk->clkdm) {
- ret = clkdm_clk_enable(clk->clkdm, hw->clk);
- if (ret) {
- WARN(1, "%s: could not enable %s's clockdomain %s: %d\n",
- __func__, __clk_get_name(hw->clk),
- clk->clkdm->name, ret);
- return ret;
- }
- }
-
- if (unlikely(clk->enable_reg == NULL)) {
- pr_err("%s: %s missing enable_reg\n", __func__,
- __clk_get_name(hw->clk));
- ret = -EINVAL;
- goto err;
- }
-
- /* FIXME should not have INVERT_ENABLE bit here */
- v = omap2_clk_readl(clk, clk->enable_reg);
- if (clk->flags & INVERT_ENABLE)
- v &= ~(1 << clk->enable_bit);
- else
- v |= (1 << clk->enable_bit);
- omap2_clk_writel(v, clk, clk->enable_reg);
- v = omap2_clk_readl(clk, clk->enable_reg); /* OCP barrier */
-
- if (clk->ops && clk->ops->find_idlest)
- _omap2_module_wait_ready(clk);
-
- return 0;
-
-err:
- if (clkdm_control && clk->clkdm)
- clkdm_clk_disable(clk->clkdm, hw->clk);
- return ret;
-}
-
-/**
- * omap2_dflt_clk_disable - disable a clock in the hardware
- * @hw: struct clk_hw * of the clock to disable
- *
- * Disable the clock @hw in the hardware, and call into the OMAP
- * clockdomain code to "disable" the corresponding clockdomain if all
- * clocks/hwmods in that clockdomain are now disabled. No return
- * value.
- */
-void omap2_dflt_clk_disable(struct clk_hw *hw)
-{
- struct clk_hw_omap *clk;
- u32 v;
-
- clk = to_clk_hw_omap(hw);
- if (!clk->enable_reg) {
- /*
- * 'independent' here refers to a clock which is not
- * controlled by its parent.
- */
- pr_err("%s: independent clock %s has no enable_reg\n",
- __func__, __clk_get_name(hw->clk));
- return;
- }
-
- v = omap2_clk_readl(clk, clk->enable_reg);
- if (clk->flags & INVERT_ENABLE)
- v |= (1 << clk->enable_bit);
- else
- v &= ~(1 << clk->enable_bit);
- omap2_clk_writel(v, clk, clk->enable_reg);
- /* No OCP barrier needed here since it is a disable operation */
-
- if (!(ti_clk_get_features()->flags & TI_CLK_DISABLE_CLKDM_CONTROL) &&
- clk->clkdm)
- clkdm_clk_disable(clk->clkdm, hw->clk);
-}
-
-/**
* omap2_clkops_enable_clkdm - increment usecount on clkdm of @hw
* @hw: struct clk_hw * of the clock being enabled
*
@@ -523,29 +278,6 @@ void omap2_clkops_disable_clkdm(struct clk_hw *hw)
clkdm_clk_disable(clk->clkdm, hw->clk);
}
-/**
- * omap2_dflt_clk_is_enabled - is clock enabled in the hardware?
- * @hw: struct clk_hw * to check
- *
- * Return 1 if the clock represented by @hw is enabled in the
- * hardware, or 0 otherwise. Intended for use in the struct
- * clk_ops.is_enabled function pointer.
- */
-int omap2_dflt_clk_is_enabled(struct clk_hw *hw)
-{
- struct clk_hw_omap *clk = to_clk_hw_omap(hw);
- u32 v;
-
- v = omap2_clk_readl(clk, clk->enable_reg);
-
- if (clk->flags & INVERT_ENABLE)
- v ^= BIT(clk->enable_bit);
-
- v &= BIT(clk->enable_bit);
-
- return v ? 1 : 0;
-}
-
static int __initdata mpurate;
/*
@@ -566,11 +298,6 @@ static int __init omap_clk_setup(char *str)
}
__setup("mpurate=", omap_clk_setup);
-const struct clk_hw_omap_ops clkhwops_wait = {
- .find_idlest = omap2_clk_dflt_find_idlest,
- .find_companion = omap2_clk_dflt_find_companion,
-};
-
/**
* omap2_clk_print_new_rates - print summary of current clock tree rates
* @hfclkin_ck_name: clk name for the off-chip HF oscillator
diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile
index fe2cfa2..fc6fe8c 100644
--- a/drivers/clk/ti/Makefile
+++ b/drivers/clk/ti/Makefile
@@ -1,7 +1,8 @@
obj-y += clk.o autoidle.o clockdomain.o
clk-common = dpll.o composite.o divider.o gate.o \
fixed-factor.o mux.o apll.o \
- clkt_dpll.o clkt_iclk.o dpll3xxx.o
+ clkt_dpll.o clkt_iclk.o dpll3xxx.o \
+ clkt_dflt.o
obj-$(CONFIG_SOC_AM33XX) += $(clk-common) clk-33xx.o
obj-$(CONFIG_SOC_TI81XX) += $(clk-common) fapll.o clk-816x.o
obj-$(CONFIG_ARCH_OMAP2) += $(clk-common) interface.o clk-2xxx.o
diff --git a/drivers/clk/ti/clkt_dflt.c b/drivers/clk/ti/clkt_dflt.c
new file mode 100644
index 0000000..a176b8a
--- /dev/null
+++ b/drivers/clk/ti/clkt_dflt.c
@@ -0,0 +1,316 @@
+/*
+ * Default clock type
+ *
+ * Copyright (C) 2005-2008, 2015 Texas Instruments, Inc.
+ * Copyright (C) 2004-2010 Nokia Corporation
+ *
+ * Contacts:
+ * Richard Woodruff <r-woodruff2 at ti.com>
+ * Paul Walmsley
+ * Tero Kristo <t-kristo at 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/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/clk/ti.h>
+#include <linux/delay.h>
+
+#include "clock.h"
+
+/*
+ * MAX_MODULE_ENABLE_WAIT: maximum of number of microseconds to wait
+ * for a module to indicate that it is no longer in idle
+ */
+#define MAX_MODULE_ENABLE_WAIT 100000
+
+/*
+ * CM module register offsets, used for calculating the companion
+ * register addresses.
+ */
+#define CM_FCLKEN 0x0000
+#define CM_ICLKEN 0x0010
+
+/**
+ * _wait_idlest_generic - wait for a module to leave the idle state
+ * @clk: module clock to wait for (needed for register offsets)
+ * @reg: virtual address of module IDLEST register
+ * @mask: value to mask against to determine if the module is active
+ * @idlest: idle state indicator (0 or 1) for the clock
+ * @name: name of the clock (for printk)
+ *
+ * Wait for a module to leave idle, where its idle-status register is
+ * not inside the CM module. Returns 1 if the module left idle
+ * promptly, or 0 if the module did not leave idle before the timeout
+ * elapsed. XXX Deprecated - should be moved into drivers for the
+ * individual IP block that the IDLEST register exists in.
+ */
+static int _wait_idlest_generic(struct clk_hw_omap *clk, void __iomem *reg,
+ u32 mask, u8 idlest, const char *name)
+{
+ int i = 0, ena = 0;
+
+ ena = (idlest) ? 0 : mask;
+
+ /* Wait until module enters enabled state */
+ for (i = 0; i < MAX_MODULE_ENABLE_WAIT; i++) {
+ if ((ti_clk_ll_ops->clk_readl(reg) & mask) == ena)
+ break;
+ udelay(1);
+ }
+
+ if (i < MAX_MODULE_ENABLE_WAIT)
+ pr_debug("omap clock: module associated with clock %s ready after %d loops\n",
+ name, i);
+ else
+ pr_err("omap clock: module associated with clock %s didn't enable in %d tries\n",
+ name, MAX_MODULE_ENABLE_WAIT);
+
+ return (i < MAX_MODULE_ENABLE_WAIT) ? 1 : 0;
+}
+
+/**
+ * _omap2_module_wait_ready - wait for an OMAP module to leave IDLE
+ * @clk: struct clk * belonging to the module
+ *
+ * If the necessary clocks for the OMAP hardware IP block that
+ * corresponds to clock @clk are enabled, then wait for the module to
+ * indicate readiness (i.e., to leave IDLE). This code does not
+ * belong in the clock code and will be moved in the medium term to
+ * module-dependent code. No return value.
+ */
+static void _omap2_module_wait_ready(struct clk_hw_omap *clk)
+{
+ void __iomem *companion_reg, *idlest_reg;
+ u8 other_bit, idlest_bit, idlest_val, idlest_reg_id;
+ s16 prcm_mod;
+ int r;
+
+ /* Not all modules have multiple clocks that their IDLEST depends on */
+ if (clk->ops->find_companion) {
+ clk->ops->find_companion(clk, &companion_reg, &other_bit);
+ if (!(ti_clk_ll_ops->clk_readl(companion_reg) &
+ (1 << other_bit)))
+ return;
+ }
+
+ clk->ops->find_idlest(clk, &idlest_reg, &idlest_bit, &idlest_val);
+ r = ti_clk_ll_ops->cm_split_idlest_reg(idlest_reg, &prcm_mod,
+ &idlest_reg_id);
+ if (r) {
+ /* IDLEST register not in the CM module */
+ _wait_idlest_generic(clk, idlest_reg, (1 << idlest_bit),
+ idlest_val, __clk_get_name(clk->hw.clk));
+ } else {
+ ti_clk_ll_ops->cm_wait_module_ready(0, prcm_mod, idlest_reg_id,
+ idlest_bit);
+ }
+}
+
+/**
+ * omap2_clk_dflt_find_companion - find companion clock to @clk
+ * @clk: struct clk * to find the companion clock of
+ * @other_reg: void __iomem ** to return the companion clock CM_*CLKEN va in
+ * @other_bit: u8 ** to return the companion clock bit shift in
+ *
+ * Note: We don't need special code here for INVERT_ENABLE for the
+ * time being since INVERT_ENABLE only applies to clocks enabled by
+ * CM_CLKEN_PLL
+ *
+ * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes it's
+ * just a matter of XORing the bits.
+ *
+ * Some clocks don't have companion clocks. For example, modules with
+ * only an interface clock (such as MAILBOXES) don't have a companion
+ * clock. Right now, this code relies on the hardware exporting a bit
+ * in the correct companion register that indicates that the
+ * nonexistent 'companion clock' is active. Future patches will
+ * associate this type of code with per-module data structures to
+ * avoid this issue, and remove the casts. No return value.
+ */
+void omap2_clk_dflt_find_companion(struct clk_hw_omap *clk,
+ void __iomem **other_reg, u8 *other_bit)
+{
+ u32 r;
+
+ /*
+ * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes
+ * it's just a matter of XORing the bits.
+ */
+ r = ((__force u32)clk->enable_reg ^ (CM_FCLKEN ^ CM_ICLKEN));
+
+ *other_reg = (__force void __iomem *)r;
+ *other_bit = clk->enable_bit;
+}
+
+/**
+ * omap2_clk_dflt_find_idlest - find CM_IDLEST reg va, bit shift for @clk
+ * @clk: struct clk * to find IDLEST info for
+ * @idlest_reg: void __iomem ** to return the CM_IDLEST va in
+ * @idlest_bit: u8 * to return the CM_IDLEST bit shift in
+ * @idlest_val: u8 * to return the idle status indicator
+ *
+ * Return the CM_IDLEST register address and bit shift corresponding
+ * to the module that "owns" this clock. This default code assumes
+ * that the CM_IDLEST bit shift is the CM_*CLKEN bit shift, and that
+ * the IDLEST register address ID corresponds to the CM_*CLKEN
+ * register address ID (e.g., that CM_FCLKEN2 corresponds to
+ * CM_IDLEST2). This is not true for all modules. No return value.
+ */
+void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
+ void __iomem **idlest_reg, u8 *idlest_bit,
+ u8 *idlest_val)
+{
+ u32 r;
+
+ r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
+ *idlest_reg = (__force void __iomem *)r;
+ *idlest_bit = clk->enable_bit;
+
+ /*
+ * 24xx uses 0 to indicate not ready, and 1 to indicate ready.
+ * 34xx reverses this, just to keep us on our toes
+ * AM35xx uses both, depending on the module.
+ */
+ *idlest_val = ti_clk_get_features()->cm_idlest_val;
+}
+
+/**
+ * omap2_dflt_clk_enable - enable a clock in the hardware
+ * @hw: struct clk_hw * of the clock to enable
+ *
+ * Enable the clock @hw in the hardware. We first call into the OMAP
+ * clockdomain code to "enable" the corresponding clockdomain if this
+ * is the first enabled user of the clockdomain. Then program the
+ * hardware to enable the clock. Then wait for the IP block that uses
+ * this clock to leave idle (if applicable). Returns the error value
+ * from clkdm_clk_enable() if it terminated with an error, or -EINVAL
+ * if @hw has a null clock enable_reg, or zero upon success.
+ */
+int omap2_dflt_clk_enable(struct clk_hw *hw)
+{
+ struct clk_hw_omap *clk;
+ u32 v;
+ int ret = 0;
+ bool clkdm_control;
+
+ if (ti_clk_get_features()->flags & TI_CLK_DISABLE_CLKDM_CONTROL)
+ clkdm_control = false;
+ else
+ clkdm_control = true;
+
+ clk = to_clk_hw_omap(hw);
+
+ if (clkdm_control && clk->clkdm) {
+ ret = ti_clk_ll_ops->clkdm_clk_enable(clk->clkdm, hw->clk);
+ if (ret) {
+ WARN(1,
+ "%s: could not enable %s's clockdomain %s: %d\n",
+ __func__, __clk_get_name(hw->clk),
+ clk->clkdm_name, ret);
+ return ret;
+ }
+ }
+
+ if (unlikely(!clk->enable_reg)) {
+ pr_err("%s: %s missing enable_reg\n", __func__,
+ __clk_get_name(hw->clk));
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* FIXME should not have INVERT_ENABLE bit here */
+ v = ti_clk_ll_ops->clk_readl(clk->enable_reg);
+ if (clk->flags & INVERT_ENABLE)
+ v &= ~(1 << clk->enable_bit);
+ else
+ v |= (1 << clk->enable_bit);
+ ti_clk_ll_ops->clk_writel(v, clk->enable_reg);
+ v = ti_clk_ll_ops->clk_readl(clk->enable_reg); /* OCP barrier */
+
+ if (clk->ops && clk->ops->find_idlest)
+ _omap2_module_wait_ready(clk);
+
+ return 0;
+
+err:
+ if (clkdm_control && clk->clkdm)
+ ti_clk_ll_ops->clkdm_clk_disable(clk->clkdm, hw->clk);
+ return ret;
+}
+
+/**
+ * omap2_dflt_clk_disable - disable a clock in the hardware
+ * @hw: struct clk_hw * of the clock to disable
+ *
+ * Disable the clock @hw in the hardware, and call into the OMAP
+ * clockdomain code to "disable" the corresponding clockdomain if all
+ * clocks/hwmods in that clockdomain are now disabled. No return
+ * value.
+ */
+void omap2_dflt_clk_disable(struct clk_hw *hw)
+{
+ struct clk_hw_omap *clk;
+ u32 v;
+
+ clk = to_clk_hw_omap(hw);
+ if (!clk->enable_reg) {
+ /*
+ * 'independent' here refers to a clock which is not
+ * controlled by its parent.
+ */
+ pr_err("%s: independent clock %s has no enable_reg\n",
+ __func__, __clk_get_name(hw->clk));
+ return;
+ }
+
+ v = ti_clk_ll_ops->clk_readl(clk->enable_reg);
+ if (clk->flags & INVERT_ENABLE)
+ v |= (1 << clk->enable_bit);
+ else
+ v &= ~(1 << clk->enable_bit);
+ ti_clk_ll_ops->clk_writel(v, clk->enable_reg);
+ /* No OCP barrier needed here since it is a disable operation */
+
+ if (!(ti_clk_get_features()->flags & TI_CLK_DISABLE_CLKDM_CONTROL) &&
+ clk->clkdm)
+ ti_clk_ll_ops->clkdm_clk_disable(clk->clkdm, hw->clk);
+}
+
+/**
+ * omap2_dflt_clk_is_enabled - is clock enabled in the hardware?
+ * @hw: struct clk_hw * to check
+ *
+ * Return 1 if the clock represented by @hw is enabled in the
+ * hardware, or 0 otherwise. Intended for use in the struct
+ * clk_ops.is_enabled function pointer.
+ */
+int omap2_dflt_clk_is_enabled(struct clk_hw *hw)
+{
+ struct clk_hw_omap *clk = to_clk_hw_omap(hw);
+ u32 v;
+
+ v = ti_clk_ll_ops->clk_readl(clk->enable_reg);
+
+ if (clk->flags & INVERT_ENABLE)
+ v ^= BIT(clk->enable_bit);
+
+ v &= BIT(clk->enable_bit);
+
+ return v ? 1 : 0;
+}
+
+const struct clk_hw_omap_ops clkhwops_wait = {
+ .find_idlest = omap2_clk_dflt_find_idlest,
+ .find_companion = omap2_clk_dflt_find_companion,
+};
diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h
index 688d9e4..f215383 100644
--- a/drivers/clk/ti/clock.h
+++ b/drivers/clk/ti/clock.h
@@ -175,9 +175,14 @@ void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks);
extern const struct clk_hw_omap_ops clkhwops_omap3_dpll;
extern const struct clk_hw_omap_ops clkhwops_omap4_dpllmx;
+extern const struct clk_hw_omap_ops clkhwops_wait;
extern const struct clk_hw_omap_ops clkhwops_iclk;
extern const struct clk_hw_omap_ops clkhwops_iclk_wait;
+int omap2_dflt_clk_enable(struct clk_hw *hw);
+void omap2_dflt_clk_disable(struct clk_hw *hw);
+int omap2_dflt_clk_is_enabled(struct clk_hw *hw);
+
u8 omap2_init_dpll_parent(struct clk_hw *hw);
int omap3_noncore_dpll_enable(struct clk_hw *hw);
void omap3_noncore_dpll_disable(struct clk_hw *hw);
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 3dadb74..891fe0f 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -278,9 +278,6 @@ int omap2_clk_disable_autoidle_all(void);
int omap2_clk_enable_autoidle_all(void);
int omap2_clk_allow_idle(struct clk *clk);
int omap2_clk_deny_idle(struct clk *clk);
-int omap2_dflt_clk_enable(struct clk_hw *hw);
-void omap2_dflt_clk_disable(struct clk_hw *hw);
-int omap2_dflt_clk_is_enabled(struct clk_hw *hw);
void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *clk);
void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk);
void omap2_clk_dflt_find_companion(struct clk_hw_omap *clk,
@@ -337,7 +334,6 @@ struct ti_clk_features *ti_clk_get_features(void);
extern const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll;
extern const struct clk_hw_omap_ops clkhwops_omap2430_i2chs_wait;
-extern const struct clk_hw_omap_ops clkhwops_wait;
extern const struct clk_hw_omap_ops clkhwops_omap3430es2_dss_usbhost_wait;
extern const struct clk_hw_omap_ops clkhwops_am35xx_ipss_module_wait;
extern const struct clk_hw_omap_ops clkhwops_am35xx_ipss_wait;
--
1.7.9.5
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