From 8dfe69cdfc5c943f946faa873ff330b47125011d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Fri, 6 Jan 2023 19:37:37 +0100 Subject: kernel: update nvmem subsystem to the latest upstream MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Rafał Miłecki --- .../805-v5.19-0008-nvmem-sfp-Use-regmap.patch | 109 +++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 target/linux/generic/backport-5.15/805-v5.19-0008-nvmem-sfp-Use-regmap.patch (limited to 'target/linux/generic/backport-5.15/805-v5.19-0008-nvmem-sfp-Use-regmap.patch') diff --git a/target/linux/generic/backport-5.15/805-v5.19-0008-nvmem-sfp-Use-regmap.patch b/target/linux/generic/backport-5.15/805-v5.19-0008-nvmem-sfp-Use-regmap.patch new file mode 100644 index 0000000000..e187238ca3 --- /dev/null +++ b/target/linux/generic/backport-5.15/805-v5.19-0008-nvmem-sfp-Use-regmap.patch @@ -0,0 +1,109 @@ +From 943eadbdb11314b41eacbcc484dfb7f93e271ff4 Mon Sep 17 00:00:00 2001 +From: Sean Anderson +Date: Fri, 29 Apr 2022 17:27:00 +0100 +Subject: [PATCH] nvmem: sfp: Use regmap + +This converts the SFP driver to use regmap. This will allow easily +supporting devices with different endians. We disallow byte-level +access, as regmap_bulk_read doesn't support it (and it's unclear what +the correct result would be when we have an endianness difference). + +Signed-off-by: Sean Anderson +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20220429162701.2222-16-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/Kconfig | 1 + + drivers/nvmem/layerscape-sfp.c | 30 ++++++++++++++++++++++-------- + 2 files changed, 23 insertions(+), 8 deletions(-) + +--- a/drivers/nvmem/Kconfig ++++ b/drivers/nvmem/Kconfig +@@ -304,6 +304,7 @@ config NVMEM_LAYERSCAPE_SFP + tristate "Layerscape SFP (Security Fuse Processor) support" + depends on ARCH_LAYERSCAPE || COMPILE_TEST + depends on HAS_IOMEM ++ select REGMAP_MMIO + help + This driver provides support to read the eFuses on Freescale + Layerscape SoC's. For example, the vendor provides a per part +--- a/drivers/nvmem/layerscape-sfp.c ++++ b/drivers/nvmem/layerscape-sfp.c +@@ -13,15 +13,17 @@ + #include + #include + #include ++#include + + #define LAYERSCAPE_SFP_OTP_OFFSET 0x0200 + + struct layerscape_sfp_priv { +- void __iomem *base; ++ struct regmap *regmap; + }; + + struct layerscape_sfp_data { + int size; ++ enum regmap_endian endian; + }; + + static int layerscape_sfp_read(void *context, unsigned int offset, void *val, +@@ -29,15 +31,16 @@ static int layerscape_sfp_read(void *con + { + struct layerscape_sfp_priv *priv = context; + +- memcpy_fromio(val, priv->base + LAYERSCAPE_SFP_OTP_OFFSET + offset, +- bytes); +- +- return 0; ++ return regmap_bulk_read(priv->regmap, ++ LAYERSCAPE_SFP_OTP_OFFSET + offset, val, ++ bytes / 4); + } + + static struct nvmem_config layerscape_sfp_nvmem_config = { + .name = "fsl-sfp", + .reg_read = layerscape_sfp_read, ++ .word_size = 4, ++ .stride = 4, + }; + + static int layerscape_sfp_probe(struct platform_device *pdev) +@@ -45,16 +48,26 @@ static int layerscape_sfp_probe(struct p + const struct layerscape_sfp_data *data; + struct layerscape_sfp_priv *priv; + struct nvmem_device *nvmem; ++ struct regmap_config config = { 0 }; ++ void __iomem *base; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + +- priv->base = devm_platform_ioremap_resource(pdev, 0); +- if (IS_ERR(priv->base)) +- return PTR_ERR(priv->base); ++ base = devm_platform_ioremap_resource(pdev, 0); ++ if (IS_ERR(base)) ++ return PTR_ERR(base); + + data = device_get_match_data(&pdev->dev); ++ config.reg_bits = 32; ++ config.reg_stride = 4; ++ config.val_bits = 32; ++ config.val_format_endian = data->endian; ++ config.max_register = LAYERSCAPE_SFP_OTP_OFFSET + data->size - 4; ++ priv->regmap = devm_regmap_init_mmio(&pdev->dev, base, &config); ++ if (IS_ERR(priv->regmap)) ++ return PTR_ERR(priv->regmap); + + layerscape_sfp_nvmem_config.size = data->size; + layerscape_sfp_nvmem_config.dev = &pdev->dev; +@@ -67,6 +80,7 @@ static int layerscape_sfp_probe(struct p + + static const struct layerscape_sfp_data ls1028a_data = { + .size = 0x88, ++ .endian = REGMAP_ENDIAN_LITTLE, + }; + + static const struct of_device_id layerscape_sfp_dt_ids[] = { -- cgit v1.2.3