[PATCH v1 03/10] clk: at91: pmc: Support backup for programmable clocks

Romain Izard
2017-09-08T15:39:11Z

From: Romain Izard <romain.izard@mobile-devices.fr>

Save and restore the System Clock and Programmable Clock register for
the backup use case.

Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
---
drivers/clk/at91/pmc.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 07dc2861ad3f..5421b03553ec 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -66,6 +66,7 @@ static struct
u32 pcr[PMC_MAX_IDS];
u32 audio_pll0;
u32 audio_pll1;
+ u32 pckr[3];
} pmc_cache;

void pmc_register_id(u8 id)
@@ -103,6 +104,8 @@ static int pmc_suspend(void)
regmap_read(pmcreg, AT91_PMC_PCR,
&pmc_cache.pcr[registered_ids[i]]);
}
+ for (i = 0; i < 3; i++)
+ regmap_read(pmcreg, AT91_PMC_PCKR(i), &pmc_cache.pckr[i]);

return 0;
}
@@ -143,6 +146,8 @@ static void pmc_resume(void)
pmc_cache.pcr[registered_ids[i]] |
AT91_PMC_PCR_CMD);
}
+ for (i = 0; i < 3; i++)
+ regmap_write(pmcreg, AT91_PMC_PCKR(i), pmc_cache.pckr[i]);

if (pmc_cache.uckr & AT91_PMC_UPLLEN)
mask |= AT91_PMC_LOCKU;
--
2.11.0