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Thu, 18 Jul 2019 14:31:26 +0000 (GMT) From: Sylwester Nawrocki To: krzk@kernel.org Cc: robh+dt@kernel.org, vireshk@kernel.org, devicetree@vger.kernel.org, kgene@kernel.org, pankaj.dubey@samsung.com, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, b.zolnierkie@samsung.com, m.szyprowski@samsung.com, Sylwester Nawrocki Subject: [PATCH v2 1/9] soc: samsung: Add exynos chipid driver support Date: Thu, 18 Jul 2019 16:30:36 +0200 Message-Id: <20190718143044.25066-2-s.nawrocki@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190718143044.25066-1-s.nawrocki@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprGKsWRmVeSWpSXmKPExsWy7djP87r7mwxiDVauU7LYOGM9q8X8I+dY Lfofv2a2OH9+A7vFpsfXWC0u75rDZvG59wijxYzz+5gs1h65y26xaOsXdovWvUfYLQ6/aWe1 2PzgGJsDr8emVZ1sHpuX1Hv0bVnF6PF5k1wASxSXTUpqTmZZapG+XQJXxvl/75gLZuhUbH/9 gKmBsUe1i5GTQ0LAROLE6VOMXYxcHEICKxgl1n36wgThfGGU6P7zkQ3C+cwosXzmP0aYlo1P V7JCJJYzSpxdfR+hpfXrBhaQKjYBQ4neo31gHSICwhL3li5nByliFrjHJHH66VkmkISwgJvE viVd7CA2i4CqxNzuE2BxXgFriat/VjJDrJOXWL3hAJjNKWAjcfjuU7BrJQSms0tMfXMMqshF YtHfW1D3CUu8Or6FHcKWkfi/cz4TREMzo0TP7tvsEM4ERon7xxdAdVhLHD5+EegjDqD7NCXW 79KHCDtK3DjxBCwsIcAnceOtIEiYGcictG06M0SYV6KjTQiiWkXi96rpTBC2lET3k/8sELaH RNOyJmg49jNKfF8whW0Co/wshGULGBlXMYqnlhbnpqcWG+ellusVJ+YWl+al6yXn525iBKaW 0/+Of93BuO9P0iFGAQ5GJR7egFyDWCHWxLLiytxDjBIczEoivLdf6scK8aYkVlalFuXHF5Xm pBYfYpTmYFES561meBAtJJCeWJKanZpakFoEk2Xi4JRqYDx1VsMi99e5/LzCZke5a59X6oU1 nDi/3JH7yuXflt2rr/PemSwjtDVPxO3Q0QM9/hVf06do1bBP25pctE5OtOhHQMSCNJ1P/Q5/ 2C62qoTWBxWyr5txcAdb4Y7LDzbssbC82W0cXFeownjw5NZ1S34pMzz//6L56dvF94xWFk1K 9vibvPf49hQlluKMREMt5qLiRACA0JtXKQMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrKLMWRmVeSWpSXmKPExsVy+t/xu7r7mgxiDZae1LHYOGM9q8X8I+dY Lfofv2a2OH9+A7vFpsfXWC0u75rDZvG59wijxYzz+5gs1h65y26xaOsXdovWvUfYLQ6/aWe1 2PzgGJsDr8emVZ1sHpuX1Hv0bVnF6PF5k1wAS5SeTVF+aUmqQkZ+cYmtUrShhZGeoaWFnpGJ pZ6hsXmslZGpkr6dTUpqTmZZapG+XYJexvl/75gLZuhUbH/9gKmBsUe1i5GTQ0LARGLj05Ws XYxcHEICSxkltk86zdLFyAGUkJKY36IEUSMs8edaFxtEzSdGie/zO1lAEmwChhK9R/sYQWwR oKJ7S5ezgxQxC7xikrg97z8TSEJYwE1i35IudhCbRUBVYm73CbA4r4C1xNU/K5khNshLrN5w AMzmFLCROHz3KdhQIaCa2S+vMU5g5FvAyLCKUSS1tDg3PbfYSK84Mbe4NC9dLzk/dxMjMMi3 Hfu5ZQdj17vgQ4wCHIxKPLwBuQaxQqyJZcWVuYcYJTiYlUR4b7/UjxXiTUmsrEotyo8vKs1J LT7EaAp01ERmKdHkfGAE5pXEG5oamltYGpobmxubWSiJ83YIHIwREkhPLEnNTk0tSC2C6WPi 4JRqYGS9zVMh3vbkk47LtbmW8w3dpabNl5976t3d4HWHAzlt+U7Hs1bkze9bNl99f6u005db rT7rr7skVK+PuPkn1Nlgu9o+tYh3upcemnemMs5cmrftgLSIyrwFD1Y+23XtSuPtVMP0f0sW 2O9ksntxR6532pPHfxquc7CFJcgcXBLZl/Bz6vOGqd+UWIozEg21mIuKEwEE5n3GiAIAAA== X-CMS-MailID: 20190718143127eucas1p13b1e2c98d270140a87f09562ef46c9a3 X-Msg-Generator: CA X-RootMTR: 20190718143127eucas1p13b1e2c98d270140a87f09562ef46c9a3 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190718143127eucas1p13b1e2c98d270140a87f09562ef46c9a3 References: <20190718143044.25066-1-s.nawrocki@samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pankaj Dubey Exynos SoCs have Chipid, for identification of product IDs and SoC revisions. This patch intends to provide initialization code for all these functionalities, at the same time it provides some sysfs entries for accessing these information to user-space. This driver uses existing binding for exynos-chipid. Changes by Bartlomiej: - fixed return values on errors - removed bogus kfree_const() - added missing Exynos4210 EVT0 id - converted code to use EXYNOS_MASK define - fixed np use after of_node_put() - fixed too early use of dev_info() - made driver fail for unknown SoC-s - added SPDX tag - updated Copyrights Signed-off-by: Pankaj Dubey [m.szyprowski: for suggestion and code snippet of product_id_to_soc_id] Signed-off-by: Marek Szyprowski Signed-off-by: Bartlomiej Zolnierkiewicz [s.nawrocki: updated copyright date] Signed-off-by: Sylwester Nawrocki --- drivers/soc/samsung/Kconfig | 5 ++ drivers/soc/samsung/Makefile | 2 + drivers/soc/samsung/exynos-chipid.c | 111 ++++++++++++++++++++++++++++ 3 files changed, 118 insertions(+) create mode 100644 drivers/soc/samsung/exynos-chipid.c diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig index 2186285fda92..2905f5262197 100644 --- a/drivers/soc/samsung/Kconfig +++ b/drivers/soc/samsung/Kconfig @@ -7,6 +7,11 @@ menuconfig SOC_SAMSUNG if SOC_SAMSUNG +config EXYNOS_CHIPID + bool "Exynos Chipid controller driver" if COMPILE_TEST + depends on ARCH_EXYNOS || COMPILE_TEST + select SOC_BUS + config EXYNOS_PMU bool "Exynos PMU controller driver" if COMPILE_TEST depends on ARCH_EXYNOS || ((ARM || ARM64) && COMPILE_TEST) diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile index 29f294baac6e..3b6a8797416c 100644 --- a/drivers/soc/samsung/Makefile +++ b/drivers/soc/samsung/Makefile @@ -1,4 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_EXYNOS_CHIPID) += exynos-chipid.o obj-$(CONFIG_EXYNOS_PMU) += exynos-pmu.o obj-$(CONFIG_EXYNOS_PMU_ARM_DRIVERS) += exynos3250-pmu.o exynos4-pmu.o \ diff --git a/drivers/soc/samsung/exynos-chipid.c b/drivers/soc/samsung/exynos-chipid.c new file mode 100644 index 000000000000..78b123ee60c0 --- /dev/null +++ b/drivers/soc/samsung/exynos-chipid.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * EXYNOS - CHIP ID support + * Author: Pankaj Dubey + * Author: Bartlomiej Zolnierkiewicz + */ + +#include +#include +#include +#include +#include +#include +#include + +#define EXYNOS_SUBREV_MASK (0xF << 4) +#define EXYNOS_MAINREV_MASK (0xF << 0) +#define EXYNOS_REV_MASK (EXYNOS_SUBREV_MASK | EXYNOS_MAINREV_MASK) +#define EXYNOS_MASK 0xFFFFF000 + +static const struct exynos_soc_id { + const char *name; + unsigned int id; +} soc_ids[] = { + { "EXYNOS3250", 0xE3472000 }, + { "EXYNOS4210", 0x43200000 }, /* EVT0 revision */ + { "EXYNOS4210", 0x43210000 }, + { "EXYNOS4212", 0x43220000 }, + { "EXYNOS4412", 0xE4412000 }, + { "EXYNOS5250", 0x43520000 }, + { "EXYNOS5260", 0xE5260000 }, + { "EXYNOS5410", 0xE5410000 }, + { "EXYNOS5420", 0xE5420000 }, + { "EXYNOS5440", 0xE5440000 }, + { "EXYNOS5800", 0xE5422000 }, + { "EXYNOS7420", 0xE7420000 }, + { "EXYNOS5433", 0xE5433000 }, +}; + +static const char * __init product_id_to_soc_id(unsigned int product_id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(soc_ids); i++) + if ((product_id & EXYNOS_MASK) == soc_ids[i].id) + return soc_ids[i].name; + return NULL; +} + +int __init exynos_chipid_early_init(void) +{ + struct soc_device_attribute *soc_dev_attr; + void __iomem *exynos_chipid_base; + struct soc_device *soc_dev; + struct device_node *root; + struct device_node *np; + u32 product_id; + u32 revision; + + /* look up for chipid node */ + np = of_find_compatible_node(NULL, NULL, "samsung,exynos4210-chipid"); + if (!np) + return -ENODEV; + + exynos_chipid_base = of_iomap(np, 0); + of_node_put(np); + + if (!exynos_chipid_base) { + pr_err("Failed to map SoC chipid\n"); + return -ENXIO; + } + + product_id = readl_relaxed(exynos_chipid_base); + revision = product_id & EXYNOS_REV_MASK; + iounmap(exynos_chipid_base); + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return -ENOMEM; + + soc_dev_attr->family = "Samsung Exynos"; + + root = of_find_node_by_path("/"); + of_property_read_string(root, "model", &soc_dev_attr->machine); + of_node_put(root); + + soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x", revision); + soc_dev_attr->soc_id = product_id_to_soc_id(product_id); + if (!soc_dev_attr->soc_id) { + pr_err("Unknown SoC\n"); + return -ENODEV; + } + + /* please note that the actual registration will be deferred */ + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr->revision); + kfree(soc_dev_attr); + return PTR_ERR(soc_dev); + } + + /* it is too early to use dev_info() here (soc_dev is NULL) */ + pr_info("soc soc0: Exynos: CPU[%s] PRO_ID[0x%x] REV[0x%x] Detected\n", + soc_dev_attr->soc_id, product_id, revision); + + return 0; +} +early_initcall(exynos_chipid_early_init);