lkml.org 
[lkml]   [2022]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 15/15] can: tcan4x5x: Specify separate read/write ranges
Date
Specify exactly which registers are read/writeable in the chip. This
is supposed to help detect any violations in the future.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
---
drivers/net/can/m_can/tcan4x5x-regmap.c | 43 +++++++++++++++++++++----
1 file changed, 37 insertions(+), 6 deletions(-)

diff --git a/drivers/net/can/m_can/tcan4x5x-regmap.c b/drivers/net/can/m_can/tcan4x5x-regmap.c
index d4b79d2d4598..19215c39cd5b 100644
--- a/drivers/net/can/m_can/tcan4x5x-regmap.c
+++ b/drivers/net/can/m_can/tcan4x5x-regmap.c
@@ -90,16 +90,47 @@ static int tcan4x5x_regmap_read(void *context,
return 0;
}

-static const struct regmap_range tcan4x5x_reg_table_yes_range[] = {
+static const struct regmap_range tcan4x5x_reg_table_wr_range[] = {
+ /* Device ID and SPI Registers */
+ regmap_reg_range(0x000c, 0x001c),
+ /* Device configuration registers and Interrupt Flags*/
+ regmap_reg_range(0x0800, 0x080c),
+ regmap_reg_range(0x0814, 0x0814),
+ regmap_reg_range(0x0820, 0x0820),
+ regmap_reg_range(0x0830, 0x0830),
+ /* M_CAN */
+ regmap_reg_range(0x100c, 0x102c),
+ regmap_reg_range(0x1048, 0x1048),
+ regmap_reg_range(0x1050, 0x105c),
+ regmap_reg_range(0x1080, 0x1088),
+ regmap_reg_range(0x1090, 0x1090),
+ regmap_reg_range(0x1098, 0x10a0),
+ regmap_reg_range(0x10a8, 0x10b0),
+ regmap_reg_range(0x10b8, 0x10c0),
+ regmap_reg_range(0x10c8, 0x10c8),
+ regmap_reg_range(0x10d0, 0x10d4),
+ regmap_reg_range(0x10e0, 0x10e4),
+ regmap_reg_range(0x10f0, 0x10f0),
+ regmap_reg_range(0x10f8, 0x10f8),
+ /* MRAM */
+ regmap_reg_range(0x8000, 0x87fc),
+};
+
+static const struct regmap_range tcan4x5x_reg_table_rd_range[] = {
regmap_reg_range(0x0000, 0x001c), /* Device ID and SPI Registers */
regmap_reg_range(0x0800, 0x083c), /* Device configuration registers and Interrupt Flags*/
regmap_reg_range(0x1000, 0x10fc), /* M_CAN */
regmap_reg_range(0x8000, 0x87fc), /* MRAM */
};

-static const struct regmap_access_table tcan4x5x_reg_table = {
- .yes_ranges = tcan4x5x_reg_table_yes_range,
- .n_yes_ranges = ARRAY_SIZE(tcan4x5x_reg_table_yes_range),
+static const struct regmap_access_table tcan4x5x_reg_table_wr = {
+ .yes_ranges = tcan4x5x_reg_table_wr_range,
+ .n_yes_ranges = ARRAY_SIZE(tcan4x5x_reg_table_wr_range),
+};
+
+static const struct regmap_access_table tcan4x5x_reg_table_rd = {
+ .yes_ranges = tcan4x5x_reg_table_rd_range,
+ .n_yes_ranges = ARRAY_SIZE(tcan4x5x_reg_table_rd_range),
};

static const struct regmap_config tcan4x5x_regmap = {
@@ -107,8 +138,8 @@ static const struct regmap_config tcan4x5x_regmap = {
.reg_stride = 4,
.pad_bits = 8,
.val_bits = 32,
- .wr_table = &tcan4x5x_reg_table,
- .rd_table = &tcan4x5x_reg_table,
+ .wr_table = &tcan4x5x_reg_table_wr,
+ .rd_table = &tcan4x5x_reg_table_rd,
.max_register = TCAN4X5X_MAX_REGISTER,
.cache_type = REGCACHE_NONE,
.read_flag_mask = (__force unsigned long)
--
2.38.1
\
 
 \ /
  Last update: 2022-11-16 21:58    [W:0.202 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site