[PATCH v5 11/11] clk: at91: sama7g5: register cpu clock

From: Claudiu Beznea
Date: Thu Nov 19 2020 - 09:39:37 EST


Register CPU clock as being the master clock prescaler. This would
be used by DVFS. The block schema of SAMA7G5's PMC contains also a divider
between master clock prescaler and CPU (PMC_CPU_RATIO.RATIO) but the
frequencies supported by SAMA7G5 could be directly received from
CPUPLL + master clock prescaler and the extra divider would do no work in
case it would be enabled.

Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
---
drivers/clk/at91/sama7g5.c | 13 ++++++-------
include/dt-bindings/clock/at91.h | 1 +
2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/at91/sama7g5.c b/drivers/clk/at91/sama7g5.c
index 927eb3b2b126..a6e20b35960e 100644
--- a/drivers/clk/at91/sama7g5.c
+++ b/drivers/clk/at91/sama7g5.c
@@ -904,7 +904,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
if (IS_ERR(regmap))
return;

- sama7g5_pmc = pmc_data_allocate(PMC_ETHPLL + 1,
+ sama7g5_pmc = pmc_data_allocate(PMC_CPU + 1,
nck(sama7g5_systemck),
nck(sama7g5_periphck),
nck(sama7g5_gck), 8);
@@ -981,18 +981,17 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
}
}

- parent_names[0] = md_slck_name;
- parent_names[1] = "mainck";
- parent_names[2] = "cpupll_divpmcck";
- parent_names[3] = "syspll_divpmcck";
- hw = at91_clk_register_master_pres(regmap, "mck0_pres", 4, parent_names,
+ parent_names[0] = "cpupll_divpmcck";
+ hw = at91_clk_register_master_pres(regmap, "cpuck", 1, parent_names,
&mck0_layout, &mck0_characteristics,
&pmc_mck0_lock,
CLK_SET_RATE_PARENT, 0);
if (IS_ERR(hw))
goto err_free;

- hw = at91_clk_register_master_div(regmap, "mck0_div", "mck0_pres",
+ sama7g5_pmc->chws[PMC_CPU] = hw;
+
+ hw = at91_clk_register_master_div(regmap, "mck0", "cpuck",
&mck0_layout, &mck0_characteristics,
&pmc_mck0_lock, 0);
if (IS_ERR(hw))
diff --git a/include/dt-bindings/clock/at91.h b/include/dt-bindings/clock/at91.h
index fab313f62e8f..98e1b2ab6403 100644
--- a/include/dt-bindings/clock/at91.h
+++ b/include/dt-bindings/clock/at91.h
@@ -34,6 +34,7 @@
#define PMC_AUDIOPMCPLL (PMC_MAIN + 6)
#define PMC_AUDIOIOPLL (PMC_MAIN + 7)
#define PMC_ETHPLL (PMC_MAIN + 8)
+#define PMC_CPU (PMC_MAIN + 9)

#ifndef AT91_PMC_MOSCS
#define AT91_PMC_MOSCS 0 /* MOSCS Flag */
--
2.7.4