From: Daniel Golle Date: Sat, 11 Mar 2023 17:55:56 +0000 (+0000) Subject: generic: backport regmap reg_base and downshift features X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d308479d10f7c40ccff725f6c2252f6c94df0829;p=openwrt%2Fstaging%2Fnbd.git generic: backport regmap reg_base and downshift features Backport new regmap features from Linux 5.18 which are needed to let mt7530 use pcs-mtk-lynxi. Signed-off-by: Daniel Golle --- diff --git a/target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch b/target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch new file mode 100644 index 0000000000..99cd89ea00 --- /dev/null +++ b/target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch @@ -0,0 +1,90 @@ +From 86fc59ef818beb0e1945d17f8e734898baba7e4e Mon Sep 17 00:00:00 2001 +From: Colin Foster +Date: Sun, 13 Mar 2022 15:45:23 -0700 +Subject: [PATCH 1/2] regmap: add configurable downshift for addresses + +Add an additional reg_downshift to be applied to register addresses before +any register accesses. An example of a device that uses this is a VSC7514 +chip, which require each register address to be downshifted by two if the +access is performed over a SPI bus. + +Signed-off-by: Colin Foster +Link: https://lore.kernel.org/r/20220313224524.399947-2-colin.foster@in-advantage.com +Signed-off-by: Mark Brown +--- + drivers/base/regmap/internal.h | 1 + + drivers/base/regmap/regmap.c | 5 +++++ + include/linux/regmap.h | 3 +++ + 3 files changed, 9 insertions(+) + +--- a/drivers/base/regmap/internal.h ++++ b/drivers/base/regmap/internal.h +@@ -31,6 +31,7 @@ struct regmap_format { + size_t buf_size; + size_t reg_bytes; + size_t pad_bytes; ++ size_t reg_downshift; + size_t val_bytes; + void (*format_write)(struct regmap *map, + unsigned int reg, unsigned int val); +--- a/drivers/base/regmap/regmap.c ++++ b/drivers/base/regmap/regmap.c +@@ -823,6 +823,7 @@ struct regmap *__regmap_init(struct devi + + map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); + map->format.pad_bytes = config->pad_bits / 8; ++ map->format.reg_downshift = config->reg_downshift; + map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); + map->format.buf_size = DIV_ROUND_UP(config->reg_bits + + config->val_bits + config->pad_bits, 8); +@@ -1735,6 +1736,7 @@ static int _regmap_raw_write_impl(struct + return ret; + } + ++ reg >>= map->format.reg_downshift; + map->format.format_reg(map->work_buf, reg, map->reg_shift); + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, + map->write_flag_mask); +@@ -1905,6 +1907,7 @@ static int _regmap_bus_formatted_write(v + return ret; + } + ++ reg >>= map->format.reg_downshift; + map->format.format_write(map, reg, val); + + trace_regmap_hw_write_start(map, reg, 1); +@@ -2346,6 +2349,7 @@ static int _regmap_raw_multi_reg_write(s + unsigned int reg = regs[i].reg; + unsigned int val = regs[i].def; + trace_regmap_hw_write_start(map, reg, 1); ++ reg >>= map->format.reg_downshift; + map->format.format_reg(u8, reg, map->reg_shift); + u8 += reg_bytes + pad_bytes; + map->format.format_val(u8, val, 0); +@@ -2673,6 +2677,7 @@ static int _regmap_raw_read(struct regma + return ret; + } + ++ reg >>= map->format.reg_downshift; + map->format.format_reg(map->work_buf, reg, map->reg_shift); + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, + map->read_flag_mask); +--- a/include/linux/regmap.h ++++ b/include/linux/regmap.h +@@ -237,6 +237,8 @@ typedef void (*regmap_unlock)(void *); + * @reg_stride: The register address stride. Valid register addresses are a + * multiple of this value. If set to 0, a value of 1 will be + * used. ++ * @reg_downshift: The number of bits to downshift the register before ++ * performing any operations. + * @pad_bits: Number of bits of padding between register and value. + * @val_bits: Number of bits in a register value, mandatory. + * +@@ -360,6 +362,7 @@ struct regmap_config { + + int reg_bits; + int reg_stride; ++ int reg_downshift; + int pad_bits; + int val_bits; + diff --git a/target/linux/generic/backport-5.15/351-v5.18-regmap-allow-a-defined-reg_base-to-be-added-to-every.patch b/target/linux/generic/backport-5.15/351-v5.18-regmap-allow-a-defined-reg_base-to-be-added-to-every.patch new file mode 100644 index 0000000000..0f32288fca --- /dev/null +++ b/target/linux/generic/backport-5.15/351-v5.18-regmap-allow-a-defined-reg_base-to-be-added-to-every.patch @@ -0,0 +1,95 @@ +From 0074f3f2b1e43d3cedd97e47fb6980db6d2ba79e Mon Sep 17 00:00:00 2001 +From: Colin Foster +Date: Sun, 13 Mar 2022 15:45:24 -0700 +Subject: [PATCH 2/2] regmap: allow a defined reg_base to be added to every + address + +There's an inconsistency that arises when a register set can be accessed +internally via MMIO, or externally via SPI. The VSC7514 chip allows both +modes of operation. When internally accessed, the system utilizes __iomem, +devm_ioremap_resource, and devm_regmap_init_mmio. + +For SPI it isn't possible to utilize memory-mapped IO. To properly operate, +the resource base must be added to the register before every operation. + +Signed-off-by: Colin Foster +Link: https://lore.kernel.org/r/20220313224524.399947-3-colin.foster@in-advantage.com +Signed-off-by: Mark Brown +--- + drivers/base/regmap/internal.h | 1 + + drivers/base/regmap/regmap.c | 6 ++++++ + include/linux/regmap.h | 3 +++ + 3 files changed, 10 insertions(+) + +--- a/drivers/base/regmap/internal.h ++++ b/drivers/base/regmap/internal.h +@@ -63,6 +63,7 @@ struct regmap { + regmap_unlock unlock; + void *lock_arg; /* This is passed to lock/unlock functions */ + gfp_t alloc_flags; ++ unsigned int reg_base; + + struct device *dev; /* Device we do I/O on */ + void *work_buf; /* Scratch buffer used to format I/O */ +--- a/drivers/base/regmap/regmap.c ++++ b/drivers/base/regmap/regmap.c +@@ -821,6 +821,8 @@ struct regmap *__regmap_init(struct devi + else + map->alloc_flags = GFP_KERNEL; + ++ map->reg_base = config->reg_base; ++ + map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); + map->format.pad_bytes = config->pad_bits / 8; + map->format.reg_downshift = config->reg_downshift; +@@ -1736,6 +1738,7 @@ static int _regmap_raw_write_impl(struct + return ret; + } + ++ reg += map->reg_base; + reg >>= map->format.reg_downshift; + map->format.format_reg(map->work_buf, reg, map->reg_shift); + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, +@@ -1907,6 +1910,7 @@ static int _regmap_bus_formatted_write(v + return ret; + } + ++ reg += map->reg_base; + reg >>= map->format.reg_downshift; + map->format.format_write(map, reg, val); + +@@ -2349,6 +2353,7 @@ static int _regmap_raw_multi_reg_write(s + unsigned int reg = regs[i].reg; + unsigned int val = regs[i].def; + trace_regmap_hw_write_start(map, reg, 1); ++ reg += map->reg_base; + reg >>= map->format.reg_downshift; + map->format.format_reg(u8, reg, map->reg_shift); + u8 += reg_bytes + pad_bytes; +@@ -2677,6 +2682,7 @@ static int _regmap_raw_read(struct regma + return ret; + } + ++ reg += map->reg_base; + reg >>= map->format.reg_downshift; + map->format.format_reg(map->work_buf, reg, map->reg_shift); + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, +--- a/include/linux/regmap.h ++++ b/include/linux/regmap.h +@@ -239,6 +239,8 @@ typedef void (*regmap_unlock)(void *); + * used. + * @reg_downshift: The number of bits to downshift the register before + * performing any operations. ++ * @reg_base: Value to be added to every register address before performing any ++ * operation. + * @pad_bits: Number of bits of padding between register and value. + * @val_bits: Number of bits in a register value, mandatory. + * +@@ -363,6 +365,7 @@ struct regmap_config { + int reg_bits; + int reg_stride; + int reg_downshift; ++ unsigned int reg_base; + int pad_bits; + int val_bits; + diff --git a/target/linux/generic/backport-5.15/352-v6.3-regmap-apply-reg_base-and-reg_downshift-for-single-r.patch b/target/linux/generic/backport-5.15/352-v6.3-regmap-apply-reg_base-and-reg_downshift-for-single-r.patch new file mode 100644 index 0000000000..804f68d23c --- /dev/null +++ b/target/linux/generic/backport-5.15/352-v6.3-regmap-apply-reg_base-and-reg_downshift-for-single-r.patch @@ -0,0 +1,57 @@ +From 697c3892d825fb78f42ec8e53bed065dd728db3e Mon Sep 17 00:00:00 2001 +From: Daniel Golle +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 +Tested-by: Colin Foster +Link: https://lore.kernel.org/r/Y9clyVS3tQEHlUhA@makrotopia.org +Signed-off-by: Mark Brown +--- + 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; diff --git a/target/linux/generic/hack-5.15/259-regmap_dynamic.patch b/target/linux/generic/hack-5.15/259-regmap_dynamic.patch index 6be5875177..76a5ace6f3 100644 --- a/target/linux/generic/hack-5.15/259-regmap_dynamic.patch +++ b/target/linux/generic/hack-5.15/259-regmap_dynamic.patch @@ -125,7 +125,7 @@ Signed-off-by: Felix Fietkau #include #include #include -@@ -3341,3 +3342,5 @@ static int __init regmap_initcall(void) +@@ -3358,3 +3359,5 @@ static int __init regmap_initcall(void) return 0; } postcore_initcall(regmap_initcall);