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Message-ID: <20250217105354.551788-6-thierry.bultel.yh@bp.renesas.com>
Date: Mon, 17 Feb 2025 11:52:06 +0100
From: Thierry Bultel <thierry.bultel.yh@...renesas.com>
To: thierry.bultel@...atsea.fr,
Geert Uytterhoeven <geert+renesas@...der.be>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>
Cc: linux-renesas-soc@...r.kernel.org,
Thierry Bultel <thierry.bultel.yh@...renesas.com>,
linux-clk@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 05/13] clk: renesas: Pass sub struct of cpg_mssr_priv to cpg_clk_register
In a coming evolution, the registration callback will need more parameters
from cpg_mssr_priv (like another base address with clock controllers
with double register block).
Instead of adding more parameters, mode the needed parameters to a public
sub-struct.
---
drivers/clk/renesas/r7s9210-cpg-mssr.c | 7 +-
drivers/clk/renesas/r8a77970-cpg-mssr.c | 11 +--
drivers/clk/renesas/rcar-gen3-cpg.c | 8 +-
drivers/clk/renesas/rcar-gen3-cpg.h | 6 +-
drivers/clk/renesas/rcar-gen4-cpg.c | 9 ++-
drivers/clk/renesas/rcar-gen4-cpg.h | 3 +-
drivers/clk/renesas/renesas-cpg-mssr.c | 99 +++++++++++++------------
drivers/clk/renesas/renesas-cpg-mssr.h | 21 +++++-
8 files changed, 93 insertions(+), 71 deletions(-)
diff --git a/drivers/clk/renesas/r7s9210-cpg-mssr.c b/drivers/clk/renesas/r7s9210-cpg-mssr.c
index a85227c248f3..733244687daa 100644
--- a/drivers/clk/renesas/r7s9210-cpg-mssr.c
+++ b/drivers/clk/renesas/r7s9210-cpg-mssr.c
@@ -159,12 +159,13 @@ static void __init r7s9210_update_clk_table(struct clk *extal_clk,
static struct clk * __init rza2_cpg_clk_register(struct device *dev,
const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
- struct clk **clks, void __iomem *base,
- struct raw_notifier_head *notifiers)
+ struct cpg_mssr_pub *pub)
{
- struct clk *parent;
+ void __iomem *base = pub->base0;
+ struct clk **clks = pub->clks;
unsigned int mult = 1;
unsigned int div = 1;
+ struct clk *parent;
parent = clks[core->parent];
if (IS_ERR(parent))
diff --git a/drivers/clk/renesas/r8a77970-cpg-mssr.c b/drivers/clk/renesas/r8a77970-cpg-mssr.c
index 3cec0f501b94..c50aa1a49196 100644
--- a/drivers/clk/renesas/r8a77970-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a77970-cpg-mssr.c
@@ -218,11 +218,13 @@ static int __init r8a77970_cpg_mssr_init(struct device *dev)
}
static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
- const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
- struct clk **clks, void __iomem *base,
- struct raw_notifier_head *notifiers)
+ const struct cpg_core_clk *core,
+ const struct cpg_mssr_info *info,
+ struct cpg_mssr_pub *pub)
{
const struct clk_div_table *table;
+ void __iomem *base = pub->base0;
+ struct clk **clks = pub->clks;
const struct clk *parent;
unsigned int shift;
@@ -236,8 +238,7 @@ static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
shift = 4;
break;
default:
- return rcar_gen3_cpg_clk_register(dev, core, info, clks, base,
- notifiers);
+ return rcar_gen3_cpg_clk_register(dev, core, info, pub);
}
parent = clks[core->parent];
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index 027100e84ee4..aafeb139fdb4 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -345,9 +345,11 @@ static const struct soc_device_attribute cpg_quirks_match[] __initconst = {
struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
- struct clk **clks, void __iomem *base,
- struct raw_notifier_head *notifiers)
+ struct cpg_mssr_pub *pub)
{
+ struct raw_notifier_head *notifiers = &pub->notifiers;
+ void __iomem *base = pub->base0;
+ struct clk **clks = pub->clks;
const struct clk *parent;
unsigned int mult = 1;
unsigned int div = 1;
@@ -431,7 +433,7 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
}
writel(value, csn->reg);
- cpg_simple_notifier_register(notifiers, csn);
+ cpg_simple_notifier_register(&pub->notifiers, csn);
break;
}
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
index bfdc649bdf12..6ad560fca01b 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.h
+++ b/drivers/clk/renesas/rcar-gen3-cpg.h
@@ -80,9 +80,9 @@ struct rcar_gen3_cpg_pll_config {
#define CPG_RCKCR 0x240
struct clk *rcar_gen3_cpg_clk_register(struct device *dev,
- const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
- struct clk **clks, void __iomem *base,
- struct raw_notifier_head *notifiers);
+ const struct cpg_core_clk *core,
+ const struct cpg_mssr_info *info,
+ struct cpg_mssr_pub *pub);
int rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
unsigned int clk_extalr, u32 mode);
diff --git a/drivers/clk/renesas/rcar-gen4-cpg.c b/drivers/clk/renesas/rcar-gen4-cpg.c
index 31aa790fd003..e02e49f7fcf8 100644
--- a/drivers/clk/renesas/rcar-gen4-cpg.c
+++ b/drivers/clk/renesas/rcar-gen4-cpg.c
@@ -418,10 +418,11 @@ static const struct clk_div_table cpg_rpcsrc_div_table[] = {
struct clk * __init rcar_gen4_cpg_clk_register(struct device *dev,
const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
- struct clk **clks, void __iomem *base,
- struct raw_notifier_head *notifiers)
+ struct cpg_mssr_pub *pub)
{
const struct clk *parent;
+ void __iomem *base = pub->base0;
+ struct clk **clks = pub->clks;
unsigned int mult = 1;
unsigned int div = 1;
u32 value;
@@ -479,7 +480,7 @@ struct clk * __init rcar_gen4_cpg_clk_register(struct device *dev,
case CLK_TYPE_GEN4_SDH:
return cpg_sdh_clk_register(core->name, base + core->offset,
- __clk_get_name(parent), notifiers);
+ __clk_get_name(parent), &pub->notifiers);
case CLK_TYPE_GEN4_SD:
return cpg_sd_clk_register(core->name, base + core->offset,
@@ -517,7 +518,7 @@ struct clk * __init rcar_gen4_cpg_clk_register(struct device *dev,
case CLK_TYPE_GEN4_RPC:
return cpg_rpc_clk_register(core->name, base + CPG_RPCCKCR,
- __clk_get_name(parent), notifiers);
+ __clk_get_name(parent), &pub->notifiers);
case CLK_TYPE_GEN4_RPCD2:
return cpg_rpcd2_clk_register(core->name, base + CPG_RPCCKCR,
diff --git a/drivers/clk/renesas/rcar-gen4-cpg.h b/drivers/clk/renesas/rcar-gen4-cpg.h
index 717fd148464f..6c8280b37c37 100644
--- a/drivers/clk/renesas/rcar-gen4-cpg.h
+++ b/drivers/clk/renesas/rcar-gen4-cpg.h
@@ -78,8 +78,7 @@ struct rcar_gen4_cpg_pll_config {
struct clk *rcar_gen4_cpg_clk_register(struct device *dev,
const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
- struct clk **clks, void __iomem *base,
- struct raw_notifier_head *notifiers);
+ struct cpg_mssr_pub *pub);
int rcar_gen4_cpg_init(const struct rcar_gen4_cpg_pll_config *config,
unsigned int clk_extalr, u32 mode);
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index 79e7a90c3b1b..7d5fba3aef19 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -127,7 +127,6 @@ static const u16 srstclr_for_gen4[] = {
*
* @rcdev: Optional reset controller entity
* @dev: CPG/MSSR device
- * @base: CPG/MSSR register block base address
* @reg_layout: CPG/MSSR register layout
* @rmw_lock: protects RMW register accesses
* @np: Device node in DT for this CPG/MSSR module
@@ -143,6 +142,7 @@ static const u16 srstclr_for_gen4[] = {
* [].val: Saved values of SMSTPCR[]
* @reserved_ids: Temporary used, reserved id list
* @num_reserved_ids: Temporary used, number of reserved id list
+ * @pub: Data passed to clock registration callback
* @clks: Array containing all Core and Module Clocks
*/
struct cpg_mssr_priv {
@@ -150,16 +150,13 @@ struct cpg_mssr_priv {
struct reset_controller_dev rcdev;
#endif
struct device *dev;
- void __iomem *base;
enum clk_reg_layout reg_layout;
- spinlock_t rmw_lock;
struct device_node *np;
unsigned int num_core_clks;
unsigned int num_mod_clks;
unsigned int last_dt_core_clk;
- struct raw_notifier_head notifiers;
const u16 *status_regs;
const u16 *control_regs;
const u16 *reset_regs;
@@ -172,6 +169,7 @@ struct cpg_mssr_priv {
unsigned int *reserved_ids;
unsigned int num_reserved_ids;
+ struct cpg_mssr_pub pub;
struct clk *clks[];
};
@@ -205,38 +203,40 @@ static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)
dev_dbg(dev, "MSTP %u%02u/%pC %s\n", reg, bit, hw->clk,
enable ? "ON" : "OFF");
- spin_lock_irqsave(&priv->rmw_lock, flags);
+ spin_lock_irqsave(&priv->pub.rmw_lock, flags);
if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
- value = readb(priv->base + priv->control_regs[reg]);
+ value = readb(priv->pub.base0 + priv->control_regs[reg]);
if (enable)
value &= ~bitmask;
else
value |= bitmask;
- writeb(value, priv->base + priv->control_regs[reg]);
+ writeb(value, priv->pub.base0 + priv->control_regs[reg]);
/* dummy read to ensure write has completed */
- readb(priv->base + priv->control_regs[reg]);
- barrier_data(priv->base + priv->control_regs[reg]);
+ readb(priv->pub.base0 + priv->control_regs[reg]);
+ barrier_data(priv->pub.base0 + priv->control_regs[reg]);
+
} else {
- value = readl(priv->base + priv->control_regs[reg]);
+ value = readl(priv->pub.base0 + priv->control_regs[reg]);
if (enable)
value &= ~bitmask;
else
value |= bitmask;
- writel(value, priv->base + priv->control_regs[reg]);
+ writel(value, priv->pub.base0 + priv->control_regs[reg]);
}
- spin_unlock_irqrestore(&priv->rmw_lock, flags);
+ spin_unlock_irqrestore(&priv->pub.rmw_lock, flags);
- if (!enable || priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
+ if (!enable || priv->reg_layout == CLK_REG_LAYOUT_RZ_A ||
+ priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H)
return 0;
- error = readl_poll_timeout_atomic(priv->base + priv->status_regs[reg],
+ error = readl_poll_timeout_atomic(priv->pub.base0 + priv->status_regs[reg],
value, !(value & bitmask), 0, 10);
if (error)
dev_err(dev, "Failed to enable SMSTP %p[%d]\n",
- priv->base + priv->control_regs[reg], bit);
+ priv->pub.base0 + priv->control_regs[reg], bit);
return error;
}
@@ -255,12 +255,13 @@ static int cpg_mstp_clock_is_enabled(struct clk_hw *hw)
{
struct mstp_clock *clock = to_mstp_clock(hw);
struct cpg_mssr_priv *priv = clock->priv;
+ unsigned int reg = clock->index / 32;
u32 value;
if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
- value = readb(priv->base + priv->control_regs[clock->index / 32]);
+ value = readb(priv->pub.base0 + priv->control_regs[reg]);
else
- value = readl(priv->base + priv->status_regs[clock->index / 32]);
+ value = readl(priv->pub.base0 + priv->status_regs[reg]);
return !(value & BIT(clock->index % 32));
}
@@ -352,7 +353,7 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
case CLK_TYPE_DIV6P1:
case CLK_TYPE_DIV6_RO:
WARN_DEBUG(core->parent >= priv->num_core_clks);
- parent = priv->clks[core->parent];
+ parent = priv->pub.clks[core->parent];
if (IS_ERR(parent)) {
clk = parent;
goto fail;
@@ -362,12 +363,12 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
if (core->type == CLK_TYPE_DIV6_RO)
/* Multiply with the DIV6 register value */
- div *= (readl(priv->base + core->offset) & 0x3f) + 1;
+ div *= (readl(priv->pub.base0 + core->offset) & 0x3f) + 1;
if (core->type == CLK_TYPE_DIV6P1) {
clk = cpg_div6_register(core->name, 1, &parent_name,
- priv->base + core->offset,
- &priv->notifiers);
+ priv->pub.base0 + core->offset,
+ &priv->pub.notifiers);
} else {
clk = clk_register_fixed_factor(NULL, core->name,
parent_name, 0,
@@ -383,8 +384,7 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
default:
if (info->cpg_clk_register)
clk = info->cpg_clk_register(dev, core, info,
- priv->clks, priv->base,
- &priv->notifiers);
+ &priv->pub);
else
dev_err(dev, "%s has unsupported core clock type %u\n",
core->name, core->type);
@@ -395,7 +395,7 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
goto fail;
dev_dbg(dev, "Core clock %pC at %lu Hz\n", clk, clk_get_rate(clk));
- priv->clks[id] = clk;
+ priv->pub.clks[id] = clk;
return;
fail:
@@ -418,14 +418,14 @@ static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod,
WARN_DEBUG(id < priv->num_core_clks);
WARN_DEBUG(id >= priv->num_core_clks + priv->num_mod_clks);
WARN_DEBUG(mod->parent >= priv->num_core_clks + priv->num_mod_clks);
- WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT);
+ WARN_DEBUG(PTR_ERR(priv->pub.clks[id]) != -ENOENT);
if (!mod->name) {
/* Skip NULLified clock */
return;
}
- parent = priv->clks[mod->parent];
+ parent = priv->pub.clks[mod->parent];
if (IS_ERR(parent)) {
clk = parent;
goto fail;
@@ -627,13 +627,13 @@ static int cpg_mssr_reset(struct reset_controller_dev *rcdev,
dev_dbg(priv->dev, "reset %u%02u\n", reg, bit);
/* Reset module */
- writel(bitmask, priv->base + priv->reset_regs[reg]);
+ writel(bitmask, priv->pub.base0 + priv->reset_regs[reg]);
/* Wait for at least one cycle of the RCLK clock (@ ca. 32 kHz) */
udelay(35);
/* Release module from reset state */
- writel(bitmask, priv->base + priv->reset_clear_regs[reg]);
+ writel(bitmask, priv->pub.base0 + priv->reset_clear_regs[reg]);
return 0;
}
@@ -647,7 +647,7 @@ static int cpg_mssr_assert(struct reset_controller_dev *rcdev, unsigned long id)
dev_dbg(priv->dev, "assert %u%02u\n", reg, bit);
- writel(bitmask, priv->base + priv->reset_regs[reg]);
+ writel(bitmask, priv->pub.base0 + priv->reset_regs[reg]);
return 0;
}
@@ -661,7 +661,7 @@ static int cpg_mssr_deassert(struct reset_controller_dev *rcdev,
dev_dbg(priv->dev, "deassert %u%02u\n", reg, bit);
- writel(bitmask, priv->base + priv->reset_clear_regs[reg]);
+ writel(bitmask, priv->pub.base0 + priv->reset_clear_regs[reg]);
return 0;
}
@@ -673,7 +673,7 @@ static int cpg_mssr_status(struct reset_controller_dev *rcdev,
unsigned int bit = id % 32;
u32 bitmask = BIT(bit);
- return !!(readl(priv->base + priv->reset_regs[reg]) & bitmask);
+ return !!(readl(priv->pub.base0 + priv->reset_regs[reg]) & bitmask);
}
static const struct reset_control_ops cpg_mssr_reset_ops = {
@@ -899,12 +899,12 @@ static int cpg_mssr_suspend_noirq(struct device *dev)
if (priv->smstpcr_saved[reg].mask)
priv->smstpcr_saved[reg].val =
priv->reg_layout == CLK_REG_LAYOUT_RZ_A ?
- readb(priv->base + priv->control_regs[reg]) :
- readl(priv->base + priv->control_regs[reg]);
+ readb(priv->pub.base0 + priv->control_regs[reg]) :
+ readl(priv->pub.base0 + priv->control_regs[reg]);
}
/* Save core clocks */
- raw_notifier_call_chain(&priv->notifiers, PM_EVENT_SUSPEND, NULL);
+ raw_notifier_call_chain(&priv->pub.notifiers, PM_EVENT_SUSPEND, NULL);
return 0;
}
@@ -921,7 +921,7 @@ static int cpg_mssr_resume_noirq(struct device *dev)
return 0;
/* Restore core clocks */
- raw_notifier_call_chain(&priv->notifiers, PM_EVENT_RESUME, NULL);
+ raw_notifier_call_chain(&priv->pub.notifiers, PM_EVENT_RESUME, NULL);
/* Restore module clocks */
for (reg = 0; reg < ARRAY_SIZE(priv->smstpcr_saved); reg++) {
@@ -930,29 +930,29 @@ static int cpg_mssr_resume_noirq(struct device *dev)
continue;
if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
- oldval = readb(priv->base + priv->control_regs[reg]);
+ oldval = readb(priv->pub.base0 + priv->control_regs[reg]);
else
- oldval = readl(priv->base + priv->control_regs[reg]);
+ oldval = readl(priv->pub.base0 + priv->control_regs[reg]);
newval = oldval & ~mask;
newval |= priv->smstpcr_saved[reg].val & mask;
if (newval == oldval)
continue;
if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
- writeb(newval, priv->base + priv->control_regs[reg]);
+ writeb(newval, priv->pub.base0 + priv->control_regs[reg]);
/* dummy read to ensure write has completed */
- readb(priv->base + priv->control_regs[reg]);
- barrier_data(priv->base + priv->control_regs[reg]);
+ readb(priv->pub.base0 + priv->control_regs[reg]);
+ barrier_data(priv->pub.base0 + priv->control_regs[reg]);
continue;
} else
- writel(newval, priv->base + priv->control_regs[reg]);
+ writel(newval, priv->pub.base0 + priv->control_regs[reg]);
/* Wait until enabled clocks are really enabled */
mask &= ~priv->smstpcr_saved[reg].val;
if (!mask)
continue;
- error = readl_poll_timeout_atomic(priv->base + priv->status_regs[reg],
+ error = readl_poll_timeout_atomic(priv->pub.base0 + priv->status_regs[reg],
oldval, !(oldval & mask), 0, 10);
if (error)
dev_warn(dev, "Failed to enable SMSTP%u[0x%x]\n", reg,
@@ -1062,12 +1062,13 @@ static int __init cpg_mssr_common_init(struct device *dev,
if (!priv)
return -ENOMEM;
+ priv->pub.clks = priv->clks;
priv->np = np;
priv->dev = dev;
- spin_lock_init(&priv->rmw_lock);
+ spin_lock_init(&priv->pub.rmw_lock);
- priv->base = of_iomap(np, 0);
- if (!priv->base) {
+ priv->pub.base0 = of_iomap(np, 0);
+ if (!priv->pub.base0) {
error = -ENOMEM;
goto out_err;
}
@@ -1075,7 +1076,7 @@ static int __init cpg_mssr_common_init(struct device *dev,
priv->num_core_clks = info->num_total_core_clks;
priv->num_mod_clks = info->num_hw_mod_clks;
priv->last_dt_core_clk = info->last_dt_core_clk;
- RAW_INIT_NOTIFIER_HEAD(&priv->notifiers);
+ RAW_INIT_NOTIFIER_HEAD(&priv->pub.notifiers);
priv->reg_layout = info->reg_layout;
if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_GEN2_AND_GEN3) {
priv->status_regs = mstpsr;
@@ -1095,7 +1096,7 @@ static int __init cpg_mssr_common_init(struct device *dev,
}
for (i = 0; i < nclks; i++)
- priv->clks[i] = ERR_PTR(-ENOENT);
+ priv->pub.clks[i] = ERR_PTR(-ENOENT);
error = cpg_mssr_reserved_init(priv, info);
if (error)
@@ -1112,8 +1113,8 @@ static int __init cpg_mssr_common_init(struct device *dev,
reserve_err:
cpg_mssr_reserved_exit(priv);
out_err:
- if (priv->base)
- iounmap(priv->base);
+ if (priv->pub.base0)
+ iounmap(priv->pub.base0);
kfree(priv);
return error;
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.h b/drivers/clk/renesas/renesas-cpg-mssr.h
index a1d6e0cbcff9..adc8948e6af4 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.h
+++ b/drivers/clk/renesas/renesas-cpg-mssr.h
@@ -8,6 +8,8 @@
#ifndef __CLK_RENESAS_CPG_MSSR_H__
#define __CLK_RENESAS_CPG_MSSR_H__
+#include <linux/notifier.h>
+
/*
* Definitions of CPG Core Clocks
*
@@ -27,6 +29,21 @@ struct cpg_core_clk {
unsigned int div;
unsigned int mult;
unsigned int offset;
+
+/**
+ * struct cpg_mssr_pub - Private data shared with
+ * device-specific clk registration code
+ *
+ * @base0: CPG/MSSR register block base0 address
+ * @rmw_lock: protects RMW register accesses
+ * @notifiers: Notifier chain to save/restore clock state for system resume
+ * @clks: pointer to clocks
+ */
+struct cpg_mssr_pub {
+ void __iomem *base0;
+ struct raw_notifier_head notifiers;
+ spinlock_t rmw_lock;
+ struct clk **clks;
};
enum clk_types {
@@ -153,8 +170,8 @@ struct cpg_mssr_info {
struct clk *(*cpg_clk_register)(struct device *dev,
const struct cpg_core_clk *core,
const struct cpg_mssr_info *info,
- struct clk **clks, void __iomem *base,
- struct raw_notifier_head *notifiers);
+ struct cpg_mssr_pub *pub);
+
};
extern const struct cpg_mssr_info r7s9210_cpg_mssr_info;
--
2.43.0
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