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From c716562753d1e51a1c53647aa77a332f97187d15 Mon Sep 17 00:00:00 2001
From: Claudiu Beznea <claudiu.beznea@microchip.com>
Date: Mon, 11 Oct 2021 14:27:08 +0300
Subject: [PATCH 237/247] clk: at91: clk-master: add register definition for
sama7g5's master clock
SAMA7G5 has 4 master clocks (MCK1..4) which are controlled though the
register at offset 0x30 (relative to PMC). In the last/first phase of
suspend/resume procedure (which is architecture specific) the parent
of master clocks are changed (via assembly code) for more power saving
(see file arch/arm/mach-at91/pm_suspend.S, macros at91_mckx_ps_enable
and at91_mckx_ps_restore). Thus the macros corresponding to register
at offset 0x30 need to be shared b/w clk-master.c and pm_suspend.S.
commit ec03f18cc222 ("clk: at91: add register definition for sama7g5's
master clock") introduced the proper macros but didn't adapted the
clk-master.c as well. Thus, this commit adapt the clk-master.c to use
the macros introduced in commit ec03f18cc222 ("clk: at91: add register
definition for sama7g5's master clock").
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20211011112719.3951784-5-claudiu.beznea@microchip.com
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
drivers/clk/at91/clk-master.c | 50 ++++++++++++++++-------------------
1 file changed, 23 insertions(+), 27 deletions(-)
--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -17,15 +17,7 @@
#define MASTER_DIV_SHIFT 8
#define MASTER_DIV_MASK 0x7
-#define PMC_MCR 0x30
-#define PMC_MCR_ID_MSK GENMASK(3, 0)
-#define PMC_MCR_CMD BIT(7)
-#define PMC_MCR_DIV GENMASK(10, 8)
-#define PMC_MCR_CSS GENMASK(20, 16)
#define PMC_MCR_CSS_SHIFT (16)
-#define PMC_MCR_EN BIT(28)
-
-#define PMC_MCR_ID(x) ((x) & PMC_MCR_ID_MSK)
#define MASTER_MAX_ID 4
@@ -687,20 +679,22 @@ static void clk_sama7g5_master_set(struc
{
unsigned long flags;
unsigned int val, cparent;
- unsigned int enable = status ? PMC_MCR_EN : 0;
+ unsigned int enable = status ? AT91_PMC_MCR_V2_EN : 0;
spin_lock_irqsave(master->lock, flags);
- regmap_write(master->regmap, PMC_MCR, PMC_MCR_ID(master->id));
- regmap_read(master->regmap, PMC_MCR, &val);
- regmap_update_bits(master->regmap, PMC_MCR,
- enable | PMC_MCR_CSS | PMC_MCR_DIV |
- PMC_MCR_CMD | PMC_MCR_ID_MSK,
+ regmap_write(master->regmap, AT91_PMC_MCR_V2,
+ AT91_PMC_MCR_V2_ID(master->id));
+ regmap_read(master->regmap, AT91_PMC_MCR_V2, &val);
+ regmap_update_bits(master->regmap, AT91_PMC_MCR_V2,
+ enable | AT91_PMC_MCR_V2_CSS | AT91_PMC_MCR_V2_DIV |
+ AT91_PMC_MCR_V2_CMD | AT91_PMC_MCR_V2_ID_MSK,
enable | (master->parent << PMC_MCR_CSS_SHIFT) |
(master->div << MASTER_DIV_SHIFT) |
- PMC_MCR_CMD | PMC_MCR_ID(master->id));
+ AT91_PMC_MCR_V2_CMD |
+ AT91_PMC_MCR_V2_ID(master->id));
- cparent = (val & PMC_MCR_CSS) >> PMC_MCR_CSS_SHIFT;
+ cparent = (val & AT91_PMC_MCR_V2_CSS) >> PMC_MCR_CSS_SHIFT;
/* Wait here only if parent is being changed. */
while ((cparent != master->parent) && !clk_master_ready(master))
@@ -725,10 +719,12 @@ static void clk_sama7g5_master_disable(s
spin_lock_irqsave(master->lock, flags);
- regmap_write(master->regmap, PMC_MCR, master->id);
- regmap_update_bits(master->regmap, PMC_MCR,
- PMC_MCR_EN | PMC_MCR_CMD | PMC_MCR_ID_MSK,
- PMC_MCR_CMD | PMC_MCR_ID(master->id));
+ regmap_write(master->regmap, AT91_PMC_MCR_V2, master->id);
+ regmap_update_bits(master->regmap, AT91_PMC_MCR_V2,
+ AT91_PMC_MCR_V2_EN | AT91_PMC_MCR_V2_CMD |
+ AT91_PMC_MCR_V2_ID_MSK,
+ AT91_PMC_MCR_V2_CMD |
+ AT91_PMC_MCR_V2_ID(master->id));
spin_unlock_irqrestore(master->lock, flags);
}
@@ -741,12 +737,12 @@ static int clk_sama7g5_master_is_enabled
spin_lock_irqsave(master->lock, flags);
- regmap_write(master->regmap, PMC_MCR, master->id);
- regmap_read(master->regmap, PMC_MCR, &val);
+ regmap_write(master->regmap, AT91_PMC_MCR_V2, master->id);
+ regmap_read(master->regmap, AT91_PMC_MCR_V2, &val);
spin_unlock_irqrestore(master->lock, flags);
- return !!(val & PMC_MCR_EN);
+ return !!(val & AT91_PMC_MCR_V2_EN);
}
static int clk_sama7g5_master_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -842,10 +838,10 @@ at91_clk_sama7g5_register_master(struct
master->mux_table = mux_table;
spin_lock_irqsave(master->lock, flags);
- regmap_write(master->regmap, PMC_MCR, master->id);
- regmap_read(master->regmap, PMC_MCR, &val);
- master->parent = (val & PMC_MCR_CSS) >> PMC_MCR_CSS_SHIFT;
- master->div = (val & PMC_MCR_DIV) >> MASTER_DIV_SHIFT;
+ regmap_write(master->regmap, AT91_PMC_MCR_V2, master->id);
+ regmap_read(master->regmap, AT91_PMC_MCR_V2, &val);
+ master->parent = (val & AT91_PMC_MCR_V2_CSS) >> PMC_MCR_CSS_SHIFT;
+ master->div = (val & AT91_PMC_MCR_V2_DIV) >> MASTER_DIV_SHIFT;
spin_unlock_irqrestore(master->lock, flags);
hw = &master->hw;
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