[PATCH V4] nvmem: add explicit config option to read old syntax fixed OF cells
From: Rafał Miłecki <zajec5@gmail.com>
Date: 2023-04-03 22:56:27
Also in:
asahi, linux-amlogic, linux-arm-msm, linux-mediatek, linux-rockchip, linux-sunxi, lkml
Subsystem:
arm/apple machine support, arm/qualcomm mailing list, arm/rockchip soc support, memory technology devices (mtd), microchip otpc driver, nvmem framework, real time clock (rtc) subsystem, sunplus ocotp driver, the rest, w1 dallas's 1-wire bus, xilinx zynqmp nvmem driver · Maintainers:
Sven Peter, Janne Grunau, Heiko Stuebner, Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Claudiu Beznea, Srinivas Kandagatla, Alexandre Belloni, Vincent Shih, Linus Torvalds, Krzysztof Kozlowski, Praveen Teja Kundanala, Kalyani Akula
From: Rafał Miłecki <rafal@milecki.pl>
Binding for fixed NVMEM cells defined directly as NVMEM device subnodes
has been deprecated. It has been replaced by the "fixed-layout" NVMEM
layout binding.
New syntax is meant to be clearer and should help avoiding imprecise
bindings.
NVMEM subsystem already supports the new binding. It should be a good
idea to limit support for old syntax to existing drivers that actually
support & use it (we can't break backward compatibility!). That way we
additionally encourage new bindings & drivers to ignore deprecated
binding.
It wasn't clear (to me) if rtc and w1 code actually uses old syntax
fixed cells. I enabled them to don't risk any breakage.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
[for meson-{efuse,mx-efuse}.c]
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
[for mtk-efuse.c, nvmem/core.c, nvmem-provider.h]
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
[MT8192, MT8195 Chromebooks]
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
[for microchip-otpc.c]
Reviewed-by: Claudiu Beznea <redacted>
[SAMA7G5-EK]
Tested-by: Claudiu Beznea <redacted>
---
This is based on top of them
[PATCH V6 3/3] nvmem: core: add support for fixed cells *layout*
V2: Fix stm32-romem.c typo breaking its compilation
Pick Martin's Acked-by
Add paragraph about layouts deprecating add_legacy_fixed_of_cells
V3: Update commit description:
1. Make it clear we're NOT dropping fixed cells support
2. Use nicer words (s/made sense/was totally safe/)
3. Explain fixed cells layout thing
4. Add paragraph with purpose of this commit
V4: Completely rewrite commit message.
Rename config option to "add_legacy_fixed_of_cells".
---
drivers/mtd/mtdcore.c | 2 ++
drivers/nvmem/apple-efuses.c | 1 +
drivers/nvmem/core.c | 8 +++++---
drivers/nvmem/imx-ocotp-scu.c | 1 +
drivers/nvmem/imx-ocotp.c | 1 +
drivers/nvmem/meson-efuse.c | 1 +
drivers/nvmem/meson-mx-efuse.c | 1 +
drivers/nvmem/microchip-otpc.c | 1 +
drivers/nvmem/mtk-efuse.c | 1 +
drivers/nvmem/qcom-spmi-sdam.c | 1 +
drivers/nvmem/qfprom.c | 1 +
drivers/nvmem/rave-sp-eeprom.c | 1 +
drivers/nvmem/rockchip-efuse.c | 1 +
drivers/nvmem/sc27xx-efuse.c | 1 +
drivers/nvmem/sprd-efuse.c | 1 +
drivers/nvmem/stm32-romem.c | 1 +
drivers/nvmem/sunplus-ocotp.c | 1 +
drivers/nvmem/sunxi_sid.c | 1 +
drivers/nvmem/uniphier-efuse.c | 1 +
drivers/nvmem/zynqmp_nvmem.c | 1 +
drivers/rtc/nvmem.c | 1 +
drivers/w1/slaves/w1_ds250x.c | 1 +
include/linux/nvmem-provider.h | 2 ++
23 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 60670b2f70b9..334adbae3690 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c@@ -522,6 +522,7 @@ static int mtd_nvmem_add(struct mtd_info *mtd) config.dev = &mtd->dev; config.name = dev_name(&mtd->dev); config.owner = THIS_MODULE; + config.add_legacy_fixed_of_cells = of_device_is_compatible(node, "nvmem-cells"); config.reg_read = mtd_nvmem_reg_read; config.size = mtd->size; config.word_size = 1;
@@ -889,6 +890,7 @@ static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd, config.name = compatible; config.id = NVMEM_DEVID_AUTO; config.owner = THIS_MODULE; + config.add_legacy_fixed_of_cells = true; config.type = NVMEM_TYPE_OTP; config.root_only = true; config.ignore_wp = true;
diff --git a/drivers/nvmem/apple-efuses.c b/drivers/nvmem/apple-efuses.c
index 9b7c87102104..d3d49d22338b 100644
--- a/drivers/nvmem/apple-efuses.c
+++ b/drivers/nvmem/apple-efuses.c@@ -36,6 +36,7 @@ static int apple_efuses_probe(struct platform_device *pdev) struct resource *res; struct nvmem_config config = { .dev = &pdev->dev, + .add_legacy_fixed_of_cells = true, .read_only = true, .reg_read = apple_efuses_read, .stride = sizeof(u32),
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index b3d5a29477f9..80c1d0a30a26 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c@@ -994,9 +994,11 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) if (rval) goto err_remove_cells; - rval = nvmem_add_cells_from_legacy_of(nvmem); - if (rval) - goto err_remove_cells; + if (config->add_legacy_fixed_of_cells) { + rval = nvmem_add_cells_from_legacy_of(nvmem); + if (rval) + goto err_remove_cells; + } dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name);
diff --git a/drivers/nvmem/imx-ocotp-scu.c b/drivers/nvmem/imx-ocotp-scu.c
index 399e1eb8b4c1..899e9108a521 100644
--- a/drivers/nvmem/imx-ocotp-scu.c
+++ b/drivers/nvmem/imx-ocotp-scu.c@@ -220,6 +220,7 @@ static int imx_scu_ocotp_write(void *context, unsigned int offset, static struct nvmem_config imx_scu_ocotp_nvmem_config = { .name = "imx-scu-ocotp", + .add_legacy_fixed_of_cells = true, .read_only = false, .word_size = 4, .stride = 1,
diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
index ac0edb6398f1..0f7531a7e15d 100644
--- a/drivers/nvmem/imx-ocotp.c
+++ b/drivers/nvmem/imx-ocotp.c@@ -621,6 +621,7 @@ static int imx_ocotp_probe(struct platform_device *pdev) return PTR_ERR(priv->clk); priv->params = of_device_get_match_data(&pdev->dev); + imx_ocotp_nvmem_config.add_legacy_fixed_of_cells = true; imx_ocotp_nvmem_config.size = 4 * priv->params->nregs; imx_ocotp_nvmem_config.dev = dev; imx_ocotp_nvmem_config.priv = priv;
diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c
index d6b533497ce1..b922df99f9bc 100644
--- a/drivers/nvmem/meson-efuse.c
+++ b/drivers/nvmem/meson-efuse.c@@ -93,6 +93,7 @@ static int meson_efuse_probe(struct platform_device *pdev) econfig->dev = dev; econfig->name = dev_name(dev); + econfig->add_legacy_fixed_of_cells = true; econfig->stride = 1; econfig->word_size = 1; econfig->reg_read = meson_efuse_read;
diff --git a/drivers/nvmem/meson-mx-efuse.c b/drivers/nvmem/meson-mx-efuse.c
index 13eb14316f46..34a911696155 100644
--- a/drivers/nvmem/meson-mx-efuse.c
+++ b/drivers/nvmem/meson-mx-efuse.c@@ -213,6 +213,7 @@ static int meson_mx_efuse_probe(struct platform_device *pdev) efuse->config.owner = THIS_MODULE; efuse->config.dev = &pdev->dev; efuse->config.priv = efuse; + efuse->config.add_legacy_fixed_of_cells = true; efuse->config.stride = drvdata->word_size; efuse->config.word_size = drvdata->word_size; efuse->config.size = SZ_512;
diff --git a/drivers/nvmem/microchip-otpc.c b/drivers/nvmem/microchip-otpc.c
index 436e0dc4f337..7cf81738a3e0 100644
--- a/drivers/nvmem/microchip-otpc.c
+++ b/drivers/nvmem/microchip-otpc.c@@ -261,6 +261,7 @@ static int mchp_otpc_probe(struct platform_device *pdev) return ret; mchp_nvmem_config.dev = otpc->dev; + mchp_nvmem_config.add_legacy_fixed_of_cells = true; mchp_nvmem_config.size = size; mchp_nvmem_config.priv = otpc; nvmem = devm_nvmem_register(&pdev->dev, &mchp_nvmem_config);
diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
index b36cd0dcc8c7..87c94686cfd2 100644
--- a/drivers/nvmem/mtk-efuse.c
+++ b/drivers/nvmem/mtk-efuse.c@@ -83,6 +83,7 @@ static int mtk_efuse_probe(struct platform_device *pdev) return PTR_ERR(priv->base); pdata = device_get_match_data(dev); + econfig.add_legacy_fixed_of_cells = true; econfig.stride = 1; econfig.word_size = 1; econfig.reg_read = mtk_reg_read;
diff --git a/drivers/nvmem/qcom-spmi-sdam.c b/drivers/nvmem/qcom-spmi-sdam.c
index f822790db49e..be618ba8b550 100644
--- a/drivers/nvmem/qcom-spmi-sdam.c
+++ b/drivers/nvmem/qcom-spmi-sdam.c@@ -142,6 +142,7 @@ static int sdam_probe(struct platform_device *pdev) sdam->sdam_config.name = "spmi_sdam"; sdam->sdam_config.id = NVMEM_DEVID_AUTO; sdam->sdam_config.owner = THIS_MODULE; + sdam->sdam_config.add_legacy_fixed_of_cells = true; sdam->sdam_config.stride = 1; sdam->sdam_config.word_size = 1; sdam->sdam_config.reg_read = sdam_read;
diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index c1e893c8a247..e4dacde70fdd 100644
--- a/drivers/nvmem/qfprom.c
+++ b/drivers/nvmem/qfprom.c@@ -357,6 +357,7 @@ static int qfprom_probe(struct platform_device *pdev) { struct nvmem_config econfig = { .name = "qfprom", + .add_legacy_fixed_of_cells = true, .stride = 1, .word_size = 1, .id = NVMEM_DEVID_AUTO,
diff --git a/drivers/nvmem/rave-sp-eeprom.c b/drivers/nvmem/rave-sp-eeprom.c
index c456011b75e8..75d98fd25cb6 100644
--- a/drivers/nvmem/rave-sp-eeprom.c
+++ b/drivers/nvmem/rave-sp-eeprom.c@@ -328,6 +328,7 @@ static int rave_sp_eeprom_probe(struct platform_device *pdev) of_property_read_string(np, "zii,eeprom-name", &config.name); config.priv = eeprom; config.dev = dev; + config.add_legacy_fixed_of_cells = true; config.size = size; config.reg_read = rave_sp_eeprom_reg_read; config.reg_write = rave_sp_eeprom_reg_write;
diff --git a/drivers/nvmem/rockchip-efuse.c b/drivers/nvmem/rockchip-efuse.c
index e4579de5d014..adc8bc70cffa 100644
--- a/drivers/nvmem/rockchip-efuse.c
+++ b/drivers/nvmem/rockchip-efuse.c@@ -205,6 +205,7 @@ static int rockchip_rk3399_efuse_read(void *context, unsigned int offset, static struct nvmem_config econfig = { .name = "rockchip-efuse", + .add_legacy_fixed_of_cells = true, .stride = 1, .word_size = 1, .read_only = true,
diff --git a/drivers/nvmem/sc27xx-efuse.c b/drivers/nvmem/sc27xx-efuse.c
index c825fc902d10..8d13b81d5250 100644
--- a/drivers/nvmem/sc27xx-efuse.c
+++ b/drivers/nvmem/sc27xx-efuse.c@@ -248,6 +248,7 @@ static int sc27xx_efuse_probe(struct platform_device *pdev) econfig.reg_read = sc27xx_efuse_read; econfig.priv = efuse; econfig.dev = &pdev->dev; + econfig.add_legacy_fixed_of_cells = true; nvmem = devm_nvmem_register(&pdev->dev, &econfig); if (IS_ERR(nvmem)) { dev_err(&pdev->dev, "failed to register nvmem config\n");
diff --git a/drivers/nvmem/sprd-efuse.c b/drivers/nvmem/sprd-efuse.c
index 4f1fcbfec394..ffc0cbfe87b3 100644
--- a/drivers/nvmem/sprd-efuse.c
+++ b/drivers/nvmem/sprd-efuse.c@@ -408,6 +408,7 @@ static int sprd_efuse_probe(struct platform_device *pdev) econfig.read_only = false; econfig.name = "sprd-efuse"; econfig.size = efuse->data->blk_nums * SPRD_EFUSE_BLOCK_WIDTH; + econfig.add_legacy_fixed_of_cells = true; econfig.reg_read = sprd_efuse_read; econfig.reg_write = sprd_efuse_write; econfig.priv = efuse;
diff --git a/drivers/nvmem/stm32-romem.c b/drivers/nvmem/stm32-romem.c
index 38d0bf557129..a44c2d6c20f9 100644
--- a/drivers/nvmem/stm32-romem.c
+++ b/drivers/nvmem/stm32-romem.c@@ -208,6 +208,7 @@ static int stm32_romem_probe(struct platform_device *pdev) priv->cfg.priv = priv; priv->cfg.owner = THIS_MODULE; priv->cfg.type = NVMEM_TYPE_OTP; + priv->cfg.add_legacy_fixed_of_cells = true; priv->lower = 0;
diff --git a/drivers/nvmem/sunplus-ocotp.c b/drivers/nvmem/sunplus-ocotp.c
index 52b928a7a6d5..1b6632fb81ea 100644
--- a/drivers/nvmem/sunplus-ocotp.c
+++ b/drivers/nvmem/sunplus-ocotp.c@@ -145,6 +145,7 @@ static int sp_ocotp_read(void *priv, unsigned int offset, void *value, size_t by static struct nvmem_config sp_ocotp_nvmem_config = { .name = "sp-ocotp", + .add_legacy_fixed_of_cells = true, .read_only = true, .word_size = 1, .size = QAC628_OTP_SIZE,
diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c
index a970f1741cc6..155f07afd9cc 100644
--- a/drivers/nvmem/sunxi_sid.c
+++ b/drivers/nvmem/sunxi_sid.c@@ -156,6 +156,7 @@ static int sunxi_sid_probe(struct platform_device *pdev) nvmem_cfg->dev = dev; nvmem_cfg->name = "sunxi-sid"; nvmem_cfg->type = NVMEM_TYPE_OTP; + nvmem_cfg->add_legacy_fixed_of_cells = true; nvmem_cfg->read_only = true; nvmem_cfg->size = cfg->size; nvmem_cfg->word_size = 1;
diff --git a/drivers/nvmem/uniphier-efuse.c b/drivers/nvmem/uniphier-efuse.c
index aca910b3b6f8..d16ed22d105c 100644
--- a/drivers/nvmem/uniphier-efuse.c
+++ b/drivers/nvmem/uniphier-efuse.c@@ -53,6 +53,7 @@ static int uniphier_efuse_probe(struct platform_device *pdev) econfig.size = resource_size(res); econfig.priv = priv; econfig.dev = dev; + econfig.add_legacy_fixed_of_cells = true; nvmem = devm_nvmem_register(dev, &econfig); return PTR_ERR_OR_ZERO(nvmem);
diff --git a/drivers/nvmem/zynqmp_nvmem.c b/drivers/nvmem/zynqmp_nvmem.c
index e28d7b133e11..23cceb823cd0 100644
--- a/drivers/nvmem/zynqmp_nvmem.c
+++ b/drivers/nvmem/zynqmp_nvmem.c@@ -58,6 +58,7 @@ static int zynqmp_nvmem_probe(struct platform_device *pdev) priv->dev = dev; econfig.dev = dev; + econfig.add_legacy_fixed_of_cells = true; econfig.reg_read = zynqmp_nvmem_read; econfig.priv = priv;
diff --git a/drivers/rtc/nvmem.c b/drivers/rtc/nvmem.c
index 07ede21cee34..37df7e80525b 100644
--- a/drivers/rtc/nvmem.c
+++ b/drivers/rtc/nvmem.c@@ -21,6 +21,7 @@ int devm_rtc_nvmem_register(struct rtc_device *rtc, nvmem_config->dev = dev; nvmem_config->owner = rtc->owner; + nvmem_config->add_legacy_fixed_of_cells = true; nvmem = devm_nvmem_register(dev, nvmem_config); if (IS_ERR(nvmem)) dev_err(dev, "failed to register nvmem device for RTC\n");
diff --git a/drivers/w1/slaves/w1_ds250x.c b/drivers/w1/slaves/w1_ds250x.c
index 7592c7050d1d..cb426f7dd23d 100644
--- a/drivers/w1/slaves/w1_ds250x.c
+++ b/drivers/w1/slaves/w1_ds250x.c@@ -168,6 +168,7 @@ static int w1_eprom_add_slave(struct w1_slave *sl) struct nvmem_device *nvmem; struct nvmem_config nvmem_cfg = { .dev = &sl->dev, + .add_legacy_fixed_of_cells = true, .reg_read = w1_nvmem_read, .type = NVMEM_TYPE_OTP, .read_only = true,
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index dae26295e6be..1b81adebdb8b 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h@@ -82,6 +82,7 @@ struct nvmem_cell_info { * @owner: Pointer to exporter module. Used for refcounting. * @cells: Optional array of pre-defined NVMEM cells. * @ncells: Number of elements in cells. + * @add_legacy_fixed_of_cells: Read fixed NVMEM cells from old OF syntax. * @keepout: Optional array of keepout ranges (sorted ascending by start). * @nkeepout: Number of elements in the keepout array. * @type: Type of the nvmem storage
@@ -112,6 +113,7 @@ struct nvmem_config { struct module *owner; const struct nvmem_cell_info *cells; int ncells; + bool add_legacy_fixed_of_cells; const struct nvmem_keepout *keepout; unsigned int nkeepout; enum nvmem_type type;
--
2.34.1