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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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9bf75da0e2
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20230823132744.350618-14-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
143 lines
3 KiB
C
143 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* i.MX IIM driver
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*
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* Copyright (c) 2017 Pengutronix, Michael Grzeschik <m.grzeschik@pengutronix.de>
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*
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* Based on the barebox iim driver,
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* Copyright (c) 2010 Baruch Siach <baruch@tkos.co.il>,
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* Orex Computed Radiography
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/nvmem-provider.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#define IIM_BANK_BASE(n) (0x800 + 0x400 * (n))
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struct imx_iim_drvdata {
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unsigned int nregs;
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};
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struct iim_priv {
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void __iomem *base;
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struct clk *clk;
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};
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static int imx_iim_read(void *context, unsigned int offset,
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void *buf, size_t bytes)
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{
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struct iim_priv *iim = context;
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int i, ret;
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u8 *buf8 = buf;
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ret = clk_prepare_enable(iim->clk);
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if (ret)
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return ret;
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for (i = offset; i < offset + bytes; i++) {
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int bank = i >> 5;
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int reg = i & 0x1f;
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*buf8++ = readl(iim->base + IIM_BANK_BASE(bank) + reg * 4);
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}
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clk_disable_unprepare(iim->clk);
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return 0;
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}
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static struct imx_iim_drvdata imx27_drvdata = {
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.nregs = 2 * 32,
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};
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static struct imx_iim_drvdata imx25_imx31_imx35_drvdata = {
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.nregs = 3 * 32,
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};
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static struct imx_iim_drvdata imx51_drvdata = {
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.nregs = 4 * 32,
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};
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static struct imx_iim_drvdata imx53_drvdata = {
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.nregs = 4 * 32 + 16,
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};
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static const struct of_device_id imx_iim_dt_ids[] = {
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{
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.compatible = "fsl,imx25-iim",
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.data = &imx25_imx31_imx35_drvdata,
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}, {
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.compatible = "fsl,imx27-iim",
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.data = &imx27_drvdata,
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}, {
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.compatible = "fsl,imx31-iim",
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.data = &imx25_imx31_imx35_drvdata,
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}, {
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.compatible = "fsl,imx35-iim",
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.data = &imx25_imx31_imx35_drvdata,
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}, {
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.compatible = "fsl,imx51-iim",
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.data = &imx51_drvdata,
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}, {
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.compatible = "fsl,imx53-iim",
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.data = &imx53_drvdata,
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}, {
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/* sentinel */
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},
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};
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MODULE_DEVICE_TABLE(of, imx_iim_dt_ids);
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static int imx_iim_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct iim_priv *iim;
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struct nvmem_device *nvmem;
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struct nvmem_config cfg = {};
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const struct imx_iim_drvdata *drvdata = NULL;
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iim = devm_kzalloc(dev, sizeof(*iim), GFP_KERNEL);
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if (!iim)
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return -ENOMEM;
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iim->base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(iim->base))
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return PTR_ERR(iim->base);
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drvdata = of_device_get_match_data(&pdev->dev);
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iim->clk = devm_clk_get(dev, NULL);
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if (IS_ERR(iim->clk))
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return PTR_ERR(iim->clk);
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cfg.name = "imx-iim",
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cfg.read_only = true,
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cfg.word_size = 1,
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cfg.stride = 1,
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cfg.reg_read = imx_iim_read,
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cfg.dev = dev;
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cfg.size = drvdata->nregs;
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cfg.priv = iim;
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nvmem = devm_nvmem_register(dev, &cfg);
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return PTR_ERR_OR_ZERO(nvmem);
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}
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static struct platform_driver imx_iim_driver = {
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.probe = imx_iim_probe,
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.driver = {
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.name = "imx-iim",
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.of_match_table = imx_iim_dt_ids,
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},
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};
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module_platform_driver(imx_iim_driver);
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MODULE_AUTHOR("Michael Grzeschik <m.grzeschik@pengutronix.de>");
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MODULE_DESCRIPTION("i.MX IIM driver");
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MODULE_LICENSE("GPL v2");
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