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Signed-off-by: Pankaj Bansal --- .../bindings/soc/fsl/qixis_ctrl.txt | 33 ++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt b/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt new file mode 100644 index 000000000000..bc2950cab71d --- /dev/null +++ b/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt @@ -0,0 +1,33 @@ +* QIXIS FPGA block + +an FPGA-based system controller, called “Qixis”, which +manages several critical system features, including: +• Configuration switch monitoring +• Power on/off sequencing +• Reset sequencing +• Power supply configuration +• Board configuration +• hardware configuration +• Background power data collection (DCM) +• Fault monitoring +• RCW bypass SRAM (replace flash RCW with internal RCW) (NOR only) +• Dedicated functional validation blocks (POSt/IRS, triggered event, and so on) +• I2C master for remote board control even with no DUT available + +The qixis registers are accessible over one or more system-specific interfaces, +typically I2C, JTAG or an embedded processor. + +Required properties: + + - compatible : string, must contain "fsl,fpga-qixis-i2c" + - reg : i2c address of the qixis device. + +Examples: + /* The FPGA node */ + fpga@66 { + compatible = "fsl,lx2160aqds-fpga", "fsl,fpga-qixis-i2c"; + reg = <0x66>; + #address-cells = <1>; + #size-cells = <0>; + } + From patchwork Fri Oct 5 08:55:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pankaj Bansal X-Patchwork-Id: 979315 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 42RHgy4WvYz9s3Z for ; Fri, 5 Oct 2018 15:02:54 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=nxp.com header.i=@nxp.com header.b="TbHYQ2J3"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 42RHgy30N9zF3Ks for ; 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Signed-off-by: Wang Dongsheng Signed-off-by: Pankaj Bansal --- drivers/soc/fsl/Kconfig | 9 ++++ drivers/soc/fsl/Makefile | 1 + drivers/soc/fsl/qixis_ctrl.c | 75 ++++++++++++++++++++++++++++++++ include/linux/fsl/qixis_ctrl.h | 20 +++++++++ 4 files changed, 105 insertions(+) diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig index 8f80e8bbf29e..c355c2cbbd45 100644 --- a/drivers/soc/fsl/Kconfig +++ b/drivers/soc/fsl/Kconfig @@ -28,4 +28,13 @@ config FSL_MC_DPIO other DPAA2 objects. This driver does not expose the DPIO objects individually, but groups them under a service layer API. + +config FSL_QIXIS + tristate "QIXIS system controller driver" + select REGMAP_I2C + default n + help + Say y here to enable QIXIS system controller api. The qixis driver + provides FPGA functions to control system. + endmenu diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile index 803ef1bfb5ff..47e0cfc66ca4 100644 --- a/drivers/soc/fsl/Makefile +++ b/drivers/soc/fsl/Makefile @@ -5,5 +5,6 @@ obj-$(CONFIG_FSL_DPAA) += qbman/ obj-$(CONFIG_QUICC_ENGINE) += qe/ obj-$(CONFIG_CPM) += qe/ +obj-$(CONFIG_FSL_QIXIS) += qixis_ctrl.o obj-$(CONFIG_FSL_GUTS) += guts.o obj-$(CONFIG_FSL_MC_DPIO) += dpio/ diff --git a/drivers/soc/fsl/qixis_ctrl.c b/drivers/soc/fsl/qixis_ctrl.c new file mode 100644 index 000000000000..b94649fb9726 --- /dev/null +++ b/drivers/soc/fsl/qixis_ctrl.c @@ -0,0 +1,75 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* Freescale QIXIS system controller driver. + * + * Copyright 2015 Freescale Semiconductor, Inc. + * Copyright 2018 NXP + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static struct regmap *qixis_regmap; + +static struct regmap_config qixis_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int fsl_qixis_i2c_probe(struct i2c_client *client) +{ + struct platform_device *pdev; + struct device_node *child; + u32 qver; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -EOPNOTSUPP; + + qixis_regmap = regmap_init_i2c(client, &qixis_regmap_config); + + /* create platform device for each of the child node of FPGA node */ + for_each_child_of_node(client->dev.of_node, child) { + pdev = of_platform_device_create(child, NULL, &client->dev); + }; + + regmap_read(qixis_regmap, offsetof(struct fsl_qixis_regs, qixis_ver), + &qver); + + pr_info("Freescale QIXIS Version: 0x%08x\n", qver); + + return 0; +} + +static int fsl_qixis_i2c_remove(struct i2c_client *client) +{ + return 0; +} + +static const struct of_device_id fsl_qixis_of_match[] = { + { .compatible = "fsl,fpga-qixis-i2c" }, + {} +}; +MODULE_DEVICE_TABLE(of, fsl_qixis_of_match); + +static struct i2c_driver fsl_qixis_i2c_driver = { + .driver = { + .name = "qixis_ctrl", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(fsl_qixis_of_match), + }, + .probe_new = fsl_qixis_i2c_probe, + .remove = fsl_qixis_i2c_remove, +}; +module_i2c_driver(fsl_qixis_i2c_driver); + +MODULE_AUTHOR("Wang Dongsheng "); +MODULE_DESCRIPTION("Freescale QIXIS system controller driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/fsl/qixis_ctrl.h b/include/linux/fsl/qixis_ctrl.h new file mode 100644 index 000000000000..00e80ef21adc --- /dev/null +++ b/include/linux/fsl/qixis_ctrl.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0+ + * + * Definitions for Freescale QIXIS system controller. + * + * Copyright 2015 Freescale Semiconductor, Inc. + * Copyright 2018 NXP + */ + +#ifndef _FSL_QIXIS_CTRL_H_ +#define _FSL_QIXIS_CTRL_H_ + +/* QIXIS MAP */ +struct fsl_qixis_regs { + u8 id; /* Identification Registers */ + u8 version; /* Version Register */ + u8 qixis_ver; /* QIXIS Version Register */ + u8 reserved1[0x1f]; +}; + +#endif