From: Yangbo Lu <yangbo.lu@xxxxxxx> The global utilities block controls power management, I/O device enabling, power-onreset(POR) configuration monitoring, alternate function selection for multiplexed signals,and clock control. This patch adds GUTS driver to manage and access global utilities block. [arnd turned this into a platform_driver registering a soc_device rather than providing an ad-hoc interface for soc-id] Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index cb58ef0d9b2c..7106463f118e 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -2,7 +2,7 @@ menu "SOC (System On Chip) specific Drivers" source "drivers/soc/bcm/Kconfig" source "drivers/soc/brcmstb/Kconfig" -source "drivers/soc/fsl/qe/Kconfig" +source "drivers/soc/fsl/Kconfig" source "drivers/soc/mediatek/Kconfig" source "drivers/soc/qcom/Kconfig" source "drivers/soc/rockchip/Kconfig" diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig new file mode 100644 index 000000000000..33d331cac8d6 --- /dev/null +++ b/drivers/soc/fsl/Kconfig @@ -0,0 +1,15 @@ +# +# Freescale SOC drivers +# + +source "drivers/soc/fsl/qe/Kconfig" + +config FSL_GUTS + bool "NXP Layerscale SoC identification" + depends on PPC_FSL || SOC_LS1021A || ARCH_LAYERSCAPE || COMPILE_TEST + default PPC_FSL || SOC_LS1021A || ARCH_LAYERSCAPE + select SOC_BUS + help + This registers a SoC device for NXP (formerly Freescale) + Layerscape devices, making information about the system + available in /sys/devices/soc/ diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile index 203307fd92c1..02afb7f980f6 100644 --- a/drivers/soc/fsl/Makefile +++ b/drivers/soc/fsl/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_QUICC_ENGINE) += qe/ obj-$(CONFIG_CPM) += qe/ +obj-$(CONFIG_FSL_GUTS) += guts.o diff --git a/drivers/soc/fsl/guts.c b/drivers/soc/fsl/guts.c new file mode 100644 index 000000000000..2f30698f5bcf --- /dev/null +++ b/drivers/soc/fsl/guts.c @@ -0,0 +1,130 @@ +/* + * Freescale QorIQ Platforms GUTS Driver + * + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/sys_soc.h> + +#define GUTS_PVR 0x0a0 +#define GUTS_SVR 0x0a4 + +struct guts { + void __iomem *regs; + bool little_endian; + struct soc_device_attribute soc; +}; + +static u32 fsl_guts_get_svr(struct guts *guts) +{ + if (guts->little_endian) + return ioread32(guts->regs + GUTS_SVR); + else + return ioread32be(guts->regs + GUTS_SVR); +} + +static u32 fsl_guts_get_pvr(struct guts *guts) +{ + if (guts->little_endian) + return ioread32(guts->regs + GUTS_PVR); + else + return ioread32be(guts->regs + GUTS_PVR); +} + +/* + * Table for matching compatible strings, for device tree + * guts node, for Freescale QorIQ SOCs. + */ +static const struct of_device_id fsl_guts_of_match[] = { + /* For T4 & B4 Series SOCs */ + { .compatible = "fsl,qoriq-device-config-1.0", .data = "T4/B4 series" }, + /* For P Series SOCs */ + { .compatible = "fsl,p1010-guts", .data = "P1010/P1014" }, + { .compatible = "fsl,p1020-guts", .data = "P1020/P1011" }, + { .compatible = "fsl,p1021-guts", .data = "P1021/P1012" }, + { .compatible = "fsl,p1022-guts", .data = "P1022/P1013" }, + { .compatible = "fsl,p1023-guts", .data = "P1013/P1017" }, + { .compatible = "fsl,p2020-guts", .data = "P2010/P2020" }, + { .compatible = "fsl,qoriq-device-config-2.0", .data = "P series" }, + /* For BSC Series SOCs */ + { .compatible = "fsl,bsc9131-guts", .data = "BSC9131 Qonverge" }, + { .compatible = "fsl,bsc9132-guts", .data = "BSC9132 Qonverge" }, + /* For MPC85xx Series SOCs */ + { .compatible = "fsl,mpc8536-guts", .data = "PowerPC MPC8536" }, + { .compatible = "fsl,mpc8544-guts", .data = "PowerPC MPC8544" }, + { .compatible = "fsl,mpc8548-guts", .data = "PowerPC MPC8548" }, + { .compatible = "fsl,mpc8568-guts", .data = "PowerPC MPC8568" }, + { .compatible = "fsl,mpc8569-guts", .data = "PowerPC MPC8569" }, + { .compatible = "fsl,mpc8572-guts", .data = "PowerPC MPC8572" }, + /* For Layerscape Series SOCs */ + { .compatible = "fsl,ls1021a-dcfg", .data = "Layerscape LS1021A" }, + { .compatible = "fsl,ls1043a-dcfg", .data = "Layerscape LS1043A" }, + { .compatible = "fsl,ls2080a-dcfg", .data = "Layerscape LS2080A" }, + {} +}; + +static void fsl_guts_init(struct device *dev, struct guts *guts) +{ + const struct of_device_id *id; + u32 svr = fsl_guts_get_svr(guts); + + guts->soc.family = "NXP QorIQ"; + id = of_match_node(fsl_guts_of_match, dev->of_node); + guts->soc.soc_id = devm_kasprintf(dev, "%s (ver 0x%06x)" id->data, + svr >> 8; + guts->soc.revision = devm_kasprintf(dev, GFP_KERNEL, "0x%02x", + svr & 0xff); +} + +static int fsl_guts_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct guts *guts; + int ret; + + guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL); + if (!guts) { + ret = -ENOMEM; + goto out; + + } + + /* + * syscon devices default to little-endian, but on powerpc we have + * existing device trees with big-endian maps and an absent endianess + * "big-property" + */ + if (!IS_ENABLED(CONFIG_POWERPC) && + !of_property_read_bool(dev->of_node, "big-endian")) + guts->little_endian = true; + + guts->regs = devm_ioremap_resource(dev, 0); + if (!guts->regs) { + ret = -ENOMEM; + kfree(guts); + goto out; + } + + fsl_guts_init(dev, guts); + ret = 0; +out: + return ret; +} + +static struct platform_driver fsl_soc_guts = { + .probe = fsl_guts_probe, + .driver.of_match_table = fsl_guts_of_match, +}; + +module_platform_driver(fsl_soc_guts); -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html