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authorMatthew Gerlach <matthew.gerlach@linux.intel.com>2021-03-10 18:55:47 +0300
committerLee Jones <lee.jones@linaro.org>2021-04-14 18:03:41 +0300
commit8169f74ca6f318f4187536050d2f5408fce9c264 (patch)
tree2dd05287ce271b5cb457690362ec60671292c918 /drivers/mfd
parent5893f4d1f43036664010e3ae1d3f7a98b2165a5d (diff)
downloadlinux-8169f74ca6f318f4187536050d2f5408fce9c264.tar.xz
mfd: intel-m10-bmc: Add access table configuration to the regmap
This patch adds access tables to the MAX 10 BMC regmap. This prevents the host from accessing the unwanted I/O space. It also filters out the invalid outputs when reading the regmap debugfs interface. Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com> Signed-off-by: Xu Yilun <yilun.xu@intel.com> Reviewed-by: Tom Rix <trix@redhat.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/intel-m10-bmc.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mfd/intel-m10-bmc.c b/drivers/mfd/intel-m10-bmc.c
index 90d0448a5500..1161933cbd4a 100644
--- a/drivers/mfd/intel-m10-bmc.c
+++ b/drivers/mfd/intel-m10-bmc.c
@@ -23,10 +23,23 @@ static struct mfd_cell m10bmc_pacn3000_subdevs[] = {
{ .name = "n3000bmc-secure" },
};
+static const struct regmap_range m10bmc_regmap_range[] = {
+ regmap_reg_range(M10BMC_LEGACY_BUILD_VER, M10BMC_LEGACY_BUILD_VER),
+ regmap_reg_range(M10BMC_SYS_BASE, M10BMC_SYS_END),
+ regmap_reg_range(M10BMC_FLASH_BASE, M10BMC_FLASH_END),
+};
+
+static const struct regmap_access_table m10bmc_access_table = {
+ .yes_ranges = m10bmc_regmap_range,
+ .n_yes_ranges = ARRAY_SIZE(m10bmc_regmap_range),
+};
+
static struct regmap_config intel_m10bmc_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
+ .wr_table = &m10bmc_access_table,
+ .rd_table = &m10bmc_access_table,
.max_register = M10BMC_MEM_END,
};