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Message-ID: <a22b1a3f-b4a3-5ec2-db67-77f4a0adc12b@linaro.org>
Date: Mon, 25 Sep 2023 10:00:54 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: 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>,
Jernej Skrabec <jernej.skrabec@...il.com>,
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 V4] nvmem: add explicit config option to read old syntax
fixed OF cells
Hi Rafal,
thankyou for the patch and having patience.
Patch, does not apply on rc1.
Can you rebase this and if possible include drivers/nvmem/sec-qfprom.c
thanks,
Srini
On 03/04/2023 23:55, Rafał Miłecki wrote:
> 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>
> ---
> 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;
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