From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 2 Sep 2026 15:31:14 -0700 Subject: treewide: refresh kmalloc_obj() conversions This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook --- drivers/nvmem/imx-iim.c | 143 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 drivers/nvmem/imx-iim.c (limited to 'drivers/nvmem/imx-iim.c') diff --git a/drivers/nvmem/imx-iim.c b/drivers/nvmem/imx-iim.c new file mode 100644 index 000000000..8cfbe55a5 --- /dev/null +++ b/drivers/nvmem/imx-iim.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * i.MX IIM driver + * + * Copyright (c) 2017 Pengutronix, Michael Grzeschik + * + * Based on the barebox iim driver, + * Copyright (c) 2010 Baruch Siach , + * Orex Computed Radiography + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define IIM_BANK_BASE(n) (0x800 + 0x400 * (n)) + +struct imx_iim_drvdata { + unsigned int nregs; +}; + +struct iim_priv { + void __iomem *base; + struct clk *clk; +}; + +static int imx_iim_read(void *context, unsigned int offset, + void *buf, size_t bytes) +{ + struct iim_priv *iim = context; + int i, ret; + u8 *buf8 = buf; + + ret = clk_prepare_enable(iim->clk); + if (ret) + return ret; + + for (i = offset; i < offset + bytes; i++) { + int bank = i >> 5; + int reg = i & 0x1f; + + *buf8++ = readl(iim->base + IIM_BANK_BASE(bank) + reg * 4); + } + + clk_disable_unprepare(iim->clk); + + return 0; +} + +static struct imx_iim_drvdata imx27_drvdata = { + .nregs = 2 * 32, +}; + +static struct imx_iim_drvdata imx25_imx31_imx35_drvdata = { + .nregs = 3 * 32, +}; + +static struct imx_iim_drvdata imx51_drvdata = { + .nregs = 4 * 32, +}; + +static struct imx_iim_drvdata imx53_drvdata = { + .nregs = 4 * 32 + 16, +}; + +static const struct of_device_id imx_iim_dt_ids[] = { + { + .compatible = "fsl,imx25-iim", + .data = &imx25_imx31_imx35_drvdata, + }, { + .compatible = "fsl,imx27-iim", + .data = &imx27_drvdata, + }, { + .compatible = "fsl,imx31-iim", + .data = &imx25_imx31_imx35_drvdata, + }, { + .compatible = "fsl,imx35-iim", + .data = &imx25_imx31_imx35_drvdata, + }, { + .compatible = "fsl,imx51-iim", + .data = &imx51_drvdata, + }, { + .compatible = "fsl,imx53-iim", + .data = &imx53_drvdata, + }, { + /* sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, imx_iim_dt_ids); + +static int imx_iim_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct iim_priv *iim; + struct nvmem_device *nvmem; + struct nvmem_config cfg = {}; + const struct imx_iim_drvdata *drvdata = NULL; + + iim = devm_kzalloc(dev, sizeof(*iim), GFP_KERNEL); + if (!iim) + return -ENOMEM; + + iim->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(iim->base)) + return PTR_ERR(iim->base); + + drvdata = of_device_get_match_data(&pdev->dev); + + iim->clk = devm_clk_get(dev, NULL); + if (IS_ERR(iim->clk)) + return PTR_ERR(iim->clk); + + cfg.name = "imx-iim"; + cfg.read_only = true; + cfg.word_size = 1; + cfg.stride = 1; + cfg.reg_read = imx_iim_read; + cfg.dev = dev; + cfg.size = drvdata->nregs; + cfg.priv = iim; + + nvmem = devm_nvmem_register(dev, &cfg); + + return PTR_ERR_OR_ZERO(nvmem); +} + +static struct platform_driver imx_iim_driver = { + .probe = imx_iim_probe, + .driver = { + .name = "imx-iim", + .of_match_table = imx_iim_dt_ids, + }, +}; +module_platform_driver(imx_iim_driver); + +MODULE_AUTHOR("Michael Grzeschik "); +MODULE_DESCRIPTION("i.MX IIM driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.3.1