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mfd: intel-m10-bmc: Add access table configuration to the regmap

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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>
This commit is contained in:
Matthew Gerlach 2021-03-10 23:55:47 +08:00 committed by Lee Jones
parent 5893f4d1f4
commit 8169f74ca6
2 changed files with 17 additions and 1 deletions
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13
drivers/mfd/intel-m10-bmc.c
View File

@ -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,
};

5
include/linux/mfd/intel-m10-bmc.h
View File

@ -11,7 +11,10 @@
#define M10BMC_LEGACY_BUILD_VER 0x300468
#define M10BMC_SYS_BASE 0x300800
#define M10BMC_MEM_END 0x1fffffff
#define M10BMC_SYS_END 0x300fff
#define M10BMC_FLASH_BASE 0x10000000
#define M10BMC_FLASH_END 0x1fffffff
#define M10BMC_MEM_END M10BMC_FLASH_END
/* Register offset of system registers */
#define NIOS2_FW_VERSION 0x0