Commit 8169f74c authored by Matthew Gerlach's avatar Matthew Gerlach Committed by Lee Jones
Browse files

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: default avatarMatthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: default avatarXu Yilun <yilun.xu@intel.com>
Reviewed-by: default avatarTom Rix <trix@redhat.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 5893f4d1

drivers/mfd/intel-m10-bmc.c

+13 −0
Original line number Diff line number Diff line
@@ -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,

};

include/linux/mfd/intel-m10-bmc.h

+4 −1
Original line number Diff line number Diff line
@@ -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