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clk: rs9: Fix suspend/resume 

[ Upstream commit 632e04739c ]

Disabling the cache in commit 2ff4ba9e37 ("clk: rs9: Fix I2C accessors")
without removing cache synchronization in resume path results in a
kernel panic as map->cache_ops is unset, due to REGCACHE_NONE.
Enable flat cache again to support resume again. num_reg_defaults_raw
is necessary to read the cache defaults from hardware. Some registers
are strapped in hardware and cannot be provided in software.

Fixes: 2ff4ba9e37 ("clk: rs9: Fix I2C accessors")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20230310074940.3475703-1-alexander.stein@ew.tq-group.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexander Stein 2023-03-10 08:49:40 +01:00 committed by Greg Kroah-Hartman
parent 132918e08e
commit 74f4471ad6
1 changed files with 2 additions and 1 deletions
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3
drivers/clk/clk-renesas-pcie.c
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@ -144,8 +144,9 @@ static int rs9_regmap_i2c_read(void *context,
static const struct regmap_config rs9_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_NONE,
.cache_type = REGCACHE_FLAT,
.max_register = RS9_REG_BCP,
.num_reg_defaults_raw = 0x8,
.rd_table = &rs9_readable_table,
.wr_table = &rs9_writeable_table,
.reg_write = rs9_regmap_i2c_write,