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From 697c3892d825fb78f42ec8e53bed065dd728db3e Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 30 Jan 2023 02:04:57 +0000
Subject: [PATCH] regmap: apply reg_base and reg_downshift for single register
ops
reg_base and reg_downshift currently don't have any effect if used with
a regmap_bus or regmap_config which only offers single register
operations (ie. reg_read, reg_write and optionally reg_update_bits).
Fix that and take them into account also for regmap_bus with only
reg_read and read_write operations by applying reg_base and
reg_downshift in _regmap_bus_reg_write, _regmap_bus_reg_read.
Also apply reg_base and reg_downshift in _regmap_update_bits, but only
in case the operation is carried out with a reg_update_bits call
defined in either regmap_bus or regmap_config.
Fixes: 0074f3f2b1e43d ("regmap: allow a defined reg_base to be added to every address")
Fixes: 86fc59ef818beb ("regmap: add configurable downshift for addresses")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Tested-by: Colin Foster <colin.foster@in-advantage.com>
Link: https://lore.kernel.org/r/Y9clyVS3tQEHlUhA@makrotopia.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/base/regmap/regmap.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1929,6 +1929,8 @@ static int _regmap_bus_reg_write(void *c
{
struct regmap *map = context;
+ reg += map->reg_base;
+ reg >>= map->format.reg_downshift;
return map->bus->reg_write(map->bus_context, reg, val);
}
@@ -2703,6 +2705,8 @@ static int _regmap_bus_reg_read(void *co
{
struct regmap *map = context;
+ reg += map->reg_base;
+ reg >>= map->format.reg_downshift;
return map->bus->reg_read(map->bus_context, reg, val);
}
@@ -3078,6 +3082,8 @@ static int _regmap_update_bits(struct re
*change = false;
if (regmap_volatile(map, reg) && map->reg_update_bits) {
+ reg += map->reg_base;
+ reg >>= map->format.reg_downshift;
ret = map->reg_update_bits(map->bus_context, reg, mask, val);
if (ret == 0 && change)
*change = true;
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