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Message-ID: <4947329.31r3eYUQgx@jernej-laptop>
Date: Thu, 28 Sep 2023 19:40:22 +0200
From: Jernej Škrabec <jernej.skrabec@...il.com>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
Rafał Miłecki <zajec5@...il.com>
Cc: Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>,
Hector Martin <marcan@...can.st>,
Sven Peter <sven@...npeter.dev>,
Alyssa Rosenzweig <alyssa@...enzweig.io>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
NXP Linux Team <linux-imx@....com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Kevin Hilman <khilman@...libre.com>,
Jerome Brunet <jbrunet@...libre.com>,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
Claudiu Beznea <claudiu.beznea@...rochip.com>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Heiko Stuebner <heiko@...ech.de>,
Orson Zhai <orsonzhai@...il.com>,
Baolin Wang <baolin.wang@...ux.alibaba.com>,
Chunyan Zhang <zhang.lyra@...il.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Vincent Shih <vincent.sunplus@...il.com>,
Chen-Yu Tsai <wens@...e.org>,
Samuel Holland <samuel@...lland.org>,
Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Michal Simek <michal.simek@...inx.com>,
Alessandro Zummo <a.zummo@...ertech.it>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Evgeniy Polyakov <zbr@...emap.net>,
linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
linux-stm32@...md-mailman.stormreply.com,
linux-sunxi@...ts.linux.dev, linux-rtc@...r.kernel.org,
Michael Walle <michael@...le.cc>,
Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH V5] nvmem: add explicit config option to read old syntax fixed OF
cells
Dne sreda, 27. september 2023 ob 22:44:46 CEST je Rafał Miłecki napisal(a):
> From: Rafał Miłecki <rafal@...ecki.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@...ecki.pl>
> [for meson-{efuse,mx-efuse}.c]
> Acked-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> [for mtk-efuse.c, nvmem/core.c, nvmem-provider.h]
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> [MT8192, MT8195 Chromebooks]
> Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> [for microchip-otpc.c]
> Reviewed-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> [SAMA7G5-EK]
> Tested-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> ---
> 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".
> V5: Rebase patch
> Cover sec-qfprom.c which uses legacy syntax
>
> 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/sec-qfprom.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 +
For sunxi:
Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>
Best regards,
Jernej
> 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 ++
> 24 files changed, 30 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index 9bd661be3ae9..fbf60d1364f0 100644
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -552,6 +552,7 @@ 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;
> @@ -898,6 +899,7 @@ 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 eaf6a3fe8ca6..2710943f53c4 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -997,9 +997,11 @@ 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;
> + }
>
> rval = nvmem_add_cells_from_fixed_layout(nvmem);
> if (rval)
> diff --git a/drivers/nvmem/imx-ocotp-scu.c b/drivers/nvmem/imx-ocotp-scu.c
> index c38d9c1c3f48..517d83e11af2 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 a223d9537f22..434f197e27bf 100644
> --- a/drivers/nvmem/imx-ocotp.c
> +++ b/drivers/nvmem/imx-ocotp.c
> @@ -615,6 +615,7 @@ 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 d6d7aeda31f9..3ff04d5ca8f8 100644
> --- a/drivers/nvmem/meson-mx-efuse.c
> +++ b/drivers/nvmem/meson-mx-efuse.c
> @@ -210,6 +210,7 @@ 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 70f2d4f2efbf..9aa8f42faa4c 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 525be03b7bba..116a39e804c7 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 df6a1c594b78..9ecf3873cbb7 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 4004c5bece42..2b40978ddb18 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 2210da40dfbd..bff27011f4ff 100644
> --- a/drivers/nvmem/sc27xx-efuse.c
> +++ b/drivers/nvmem/sc27xx-efuse.c
> @@ -247,6 +247,7 @@ 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/sec-qfprom.c b/drivers/nvmem/sec-qfprom.c
> index e48c2dc0c44b..19799b3fe00a 100644
> --- a/drivers/nvmem/sec-qfprom.c
> +++ b/drivers/nvmem/sec-qfprom.c
> @@ -47,6 +47,7 @@ static int sec_qfprom_probe(struct platform_device *pdev)
> {
> struct nvmem_config econfig = {
> .name = "sec-qfprom",
> + .add_legacy_fixed_of_cells = true,
> .stride = 1,
> .word_size = 1,
> .id = NVMEM_DEVID_AUTO,
> diff --git a/drivers/nvmem/sprd-efuse.c b/drivers/nvmem/sprd-efuse.c
> index 7e6e31db4baa..bb3105f3291f 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 0f84044bd1ad..1541c20709d2 100644
> --- a/drivers/nvmem/stm32-romem.c
> +++ b/drivers/nvmem/stm32-romem.c
> @@ -207,6 +207,7 @@ 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 f3a18aa0a6c7..38f5d9df39cd 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 5d364d85347f..ba14a76208ab 100644
> --- a/drivers/nvmem/sunxi_sid.c
> +++ b/drivers/nvmem/sunxi_sid.c
> @@ -153,6 +153,7 @@ 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 0a1dbb80537e..6ad3295d3195 100644
> --- a/drivers/nvmem/uniphier-efuse.c
> +++ b/drivers/nvmem/uniphier-efuse.c
> @@ -52,6 +52,7 @@ 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 f49bb9a26d05..7f15aa89a9d0 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;
>
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