From: Alexander Stein alexander.stein@ew.tq-group.com
[ Upstream commit 632e04739c8f45c2d9ca4d4c5bd18d80c2ac9296 ]
Disabling the cache in commit 2ff4ba9e3702 ("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: 2ff4ba9e3702 ("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-gro... Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/clk-renesas-pcie.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/clk-renesas-pcie.c b/drivers/clk/clk-renesas-pcie.c index e6247141d0c05..3e98a16eba6bb 100644 --- a/drivers/clk/clk-renesas-pcie.c +++ b/drivers/clk/clk-renesas-pcie.c @@ -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,