soc: samsung: chipid: Convert exynos-chipid driver to use the regmap API (40d8aff6) · Commits · 戴 / test

drivers/soc/samsung/exynos-chipid.c

+13 −21

Original line number	Diff line number	Diff line
		@@ -9,16 +9,13 @@
		*/

		#include <linux/io.h>
		#include <linux/mfd/syscon.h>
		#include <linux/of.h>
		#include <linux/of_address.h>
		#include <linux/regmap.h>
		#include <linux/slab.h>
		#include <linux/soc/samsung/exynos-chipid.h>
		#include <linux/sys_soc.h>

		#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;
		@@ -51,29 +48,24 @@ static const char * __init product_id_to_soc_id(unsigned int product_id)
		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;
		struct regmap *regmap;
		u32 product_id;
		u32 revision;
		int ret;

		/* 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;
		regmap = syscon_regmap_lookup_by_compatible("samsung,exynos4210-chipid");
		if (IS_ERR(regmap)) {
		pr_err("Failed to get CHIPID regmap\n");
		return PTR_ERR(regmap);
		}

		product_id = readl_relaxed(exynos_chipid_base);
		ret = regmap_read(regmap, EXYNOS_CHIPID_REG_PRO_ID, &product_id);
		if (ret < 0)
		return ret;

		revision = product_id & EXYNOS_REV_MASK;
		iounmap(exynos_chipid_base);

		soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
		if (!soc_dev_attr)

include/linux/soc/samsung/exynos-chipid.h

0 → 100644

+52 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 */
		/*
		* Copyright (c) 2018 Samsung Electronics Co., Ltd.
		* http://www.samsung.com/
		*
		* Exynos - CHIPID support
		*/
		#ifndef __LINUX_SOC_EXYNOS_CHIPID_H
		#define __LINUX_SOC_EXYNOS_CHIPID_H

		#define EXYNOS_CHIPID_REG_PRO_ID 0x00
		#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

		#define EXYNOS_CHIPID_REG_PKG_ID 0x04
		/* Bit field definitions for EXYNOS_CHIPID_REG_PKG_ID register */
		#define EXYNOS5422_IDS_OFFSET 24
		#define EXYNOS5422_IDS_MASK 0xff
		#define EXYNOS5422_USESG_OFFSET 3
		#define EXYNOS5422_USESG_MASK 0x01
		#define EXYNOS5422_SG_OFFSET 0
		#define EXYNOS5422_SG_MASK 0x07
		#define EXYNOS5422_TABLE_OFFSET 8
		#define EXYNOS5422_TABLE_MASK 0x03
		#define EXYNOS5422_SG_A_OFFSET 17
		#define EXYNOS5422_SG_A_MASK 0x0f
		#define EXYNOS5422_SG_B_OFFSET 21
		#define EXYNOS5422_SG_B_MASK 0x03
		#define EXYNOS5422_SG_BSIGN_OFFSET 23
		#define EXYNOS5422_SG_BSIGN_MASK 0x01
		#define EXYNOS5422_BIN2_OFFSET 12
		#define EXYNOS5422_BIN2_MASK 0x01

		#define EXYNOS_CHIPID_REG_LOT_ID 0x14

		#define EXYNOS_CHIPID_REG_AUX_INFO 0x1c
		/* Bit field definitions for EXYNOS_CHIPID_REG_AUX_INFO register */
		#define EXYNOS5422_TMCB_OFFSET 0
		#define EXYNOS5422_TMCB_MASK 0x7f
		#define EXYNOS5422_ARM_UP_OFFSET 8
		#define EXYNOS5422_ARM_UP_MASK 0x03
		#define EXYNOS5422_ARM_DN_OFFSET 10
		#define EXYNOS5422_ARM_DN_MASK 0x03
		#define EXYNOS5422_KFC_UP_OFFSET 12
		#define EXYNOS5422_KFC_UP_MASK 0x03
		#define EXYNOS5422_KFC_DN_OFFSET 14
		#define EXYNOS5422_KFC_DN_MASK 0x03

		#endif /__LINUX_SOC_EXYNOS_CHIPID_H /

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