mirror of
https://github.com/openwrt/openwrt.git
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1de5f74062
All patches rebased automatically.
Build system: x86_64
Build-tested: ramips/tplink_archer-a6-v3, filogic/xiaomi_redmi-router-ax6000-ubootmod
Run-tested: ramips/tplink_archer-a6-v3, filogic/xiaomi_redmi-router-ax6000-ubootmod
Signed-off-by: John Audia <therealgraysky@proton.me>
(cherry picked from commit 5dc78d8f18)
96 lines
3.4 KiB
Diff
96 lines
3.4 KiB
Diff
From 0074f3f2b1e43d3cedd97e47fb6980db6d2ba79e Mon Sep 17 00:00:00 2001
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From: Colin Foster <colin.foster@in-advantage.com>
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Date: Sun, 13 Mar 2022 15:45:24 -0700
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Subject: [PATCH 2/2] regmap: allow a defined reg_base to be added to every
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address
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There's an inconsistency that arises when a register set can be accessed
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internally via MMIO, or externally via SPI. The VSC7514 chip allows both
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modes of operation. When internally accessed, the system utilizes __iomem,
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devm_ioremap_resource, and devm_regmap_init_mmio.
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For SPI it isn't possible to utilize memory-mapped IO. To properly operate,
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the resource base must be added to the register before every operation.
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Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
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Link: https://lore.kernel.org/r/20220313224524.399947-3-colin.foster@in-advantage.com
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Signed-off-by: Mark Brown <broonie@kernel.org>
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---
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drivers/base/regmap/internal.h | 1 +
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drivers/base/regmap/regmap.c | 6 ++++++
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include/linux/regmap.h | 3 +++
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3 files changed, 10 insertions(+)
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--- a/drivers/base/regmap/internal.h
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+++ b/drivers/base/regmap/internal.h
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@@ -63,6 +63,7 @@ struct regmap {
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regmap_unlock unlock;
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void *lock_arg; /* This is passed to lock/unlock functions */
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gfp_t alloc_flags;
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+ unsigned int reg_base;
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struct device *dev; /* Device we do I/O on */
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void *work_buf; /* Scratch buffer used to format I/O */
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--- a/drivers/base/regmap/regmap.c
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+++ b/drivers/base/regmap/regmap.c
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@@ -821,6 +821,8 @@ struct regmap *__regmap_init(struct devi
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else
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map->alloc_flags = GFP_KERNEL;
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+ map->reg_base = config->reg_base;
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+
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map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
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map->format.pad_bytes = config->pad_bits / 8;
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map->format.reg_downshift = config->reg_downshift;
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@@ -1736,6 +1738,7 @@ static int _regmap_raw_write_impl(struct
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return ret;
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}
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+ reg += map->reg_base;
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reg >>= map->format.reg_downshift;
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map->format.format_reg(map->work_buf, reg, map->reg_shift);
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regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
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@@ -1907,6 +1910,7 @@ static int _regmap_bus_formatted_write(v
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return ret;
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}
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+ reg += map->reg_base;
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reg >>= map->format.reg_downshift;
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map->format.format_write(map, reg, val);
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@@ -2351,6 +2355,7 @@ static int _regmap_raw_multi_reg_write(s
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unsigned int reg = regs[i].reg;
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unsigned int val = regs[i].def;
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trace_regmap_hw_write_start(map, reg, 1);
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+ reg += map->reg_base;
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reg >>= map->format.reg_downshift;
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map->format.format_reg(u8, reg, map->reg_shift);
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u8 += reg_bytes + pad_bytes;
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@@ -2679,6 +2684,7 @@ static int _regmap_raw_read(struct regma
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return ret;
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}
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+ reg += map->reg_base;
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reg >>= map->format.reg_downshift;
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map->format.format_reg(map->work_buf, reg, map->reg_shift);
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regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
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--- a/include/linux/regmap.h
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+++ b/include/linux/regmap.h
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@@ -239,6 +239,8 @@ typedef void (*regmap_unlock)(void *);
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* used.
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* @reg_downshift: The number of bits to downshift the register before
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* performing any operations.
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+ * @reg_base: Value to be added to every register address before performing any
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+ * operation.
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* @pad_bits: Number of bits of padding between register and value.
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* @val_bits: Number of bits in a register value, mandatory.
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*
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@@ -363,6 +365,7 @@ struct regmap_config {
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int reg_bits;
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int reg_stride;
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int reg_downshift;
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+ unsigned int reg_base;
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int pad_bits;
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int val_bits;
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