From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tan Jui Nee Subject: [PATCH v8 6/6] mfd: lpc_ich: Add support for Intel Apollo Lake GPIO pinctrl in non-ACPI system Date: Wed, 12 Oct 2016 14:51:06 +0800 Message-ID: <1476255066-22653-7-git-send-email-jui.nee.tan@intel.com> References: <1476255066-22653-1-git-send-email-jui.nee.tan@intel.com> Return-path: Received: from mga07.intel.com ([134.134.136.100]:9143 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754100AbcJLGwp (ORCPT ); Wed, 12 Oct 2016 02:52:45 -0400 In-Reply-To: <1476255066-22653-1-git-send-email-jui.nee.tan@intel.com> Sender: linux-gpio-owner@vger.kernel.org List-Id: linux-gpio@vger.kernel.org To: mika.westerberg@linux.intel.com, heikki.krogerus@linux.intel.com, andriy.shevchenko@linux.intel.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, ptyser@xes-inc.com, lee.jones@linaro.org, linus.walleij@linaro.org Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, jui.nee.tan@intel.com, jonathan.yong@intel.com, ong.hock.yu@intel.com, tony.luck@intel.com, wan.ahmad.zainie.wan.mohamad@intel.com This driver uses the P2SB hide/unhide mechanism cooperatively to pass the PCI BAR address to the gpio platform driver. Signed-off-by: Tan Jui Nee --- Changes in V8: - Rename source file lpc_ich-apl.c to lpc_ich_apl.c (suggested by Mika). Changes in V7: - Add author information and rewrite description of source file lpc_ich-apl.c and lpc_ich_apl.h. - Sort the header files by alphabetical order in lpc_ich-apl.c. - Rename header file lpc_ich-apl.h to lpc_ich_apl.h (suggested by Lee). - Remove unneeded pdata_size and platform_data from mfd_cell. Also, remove unneeded apl_pinctrl_pdata. - Since variable apl_p2sb is only used once, hence switch it out for the PCI_DEVFN macro (suggested by Lee). - Define APL_GPIO_COMMUNITY_MAX as total Apollo Lake GPIO communities supported. - Set resources in mfd_cell for each GPIO community. - Call p2sb_bar() function once instead of four times inside the for loop. And make p2sb_bar() function just to fill in the base address into a scratch "struct resource" and have the loop do the additions to base/end. - Remove entire apl_pinctrl_pdata.name memory allocation since it is no longer needed. - Return ret at the end of lpc_ich_add_gpio() function. Changes in V6: - Rename CONFIG_X86_INTEL_APL to CONFIG_X86_INTEL_IVI so that it relates to the actual product, as suggested by Mika. - Rework Makefile according Andy's comments. - Rename lpc_ich_misc() to lpc_ich_add_gpio() so that the name should not be so generic, as suggested by Andy. - Call lpc_ich_add_gpio() via priv->chipset. - lpc_ich_add_gpio() function will be moved from .../include/linux/mfd/lpc_ich.h to .../drivers/mfd/lpc_ich-apl.h as this is a part of internal driver interface as suggested by Andy. - Move enum lpc_chipsets from .../drivers/mfd/lpc_ich-core.c to .../include/linux/mfd/lpc_ich.h as lpc_chipsets is also accessed by lpc_ich_add_gpio(). - Check if kasprintf return value for all 4 gpio controllers before proceed to add platform device by using mfd_add_devices(). Changes in V5: - Split lpc-ich driver into two parts (lpc_ich-core and lpc_ich-apl). The file lpc_ich-apl.c introduces gpio platform driver in MFD. - Rename Kconfig option CONFIG_X86_INTEL_NON_ACPI to CONFIG_X86_INTEL_APL so that it reflects actual product as suggested by Mika. Changes in V4: - Move Kconfig option CONFIG_X86_INTEL_NON_ACPI from [PATCH 2/3] x86/platform/p2sb: New Primary to Sideband bridge support driver for Intel SOC's to [PATCH 3/3] mfd: lpc_ich: Add support for Intel Apollo Lake GPIO pinctrl in non-ACPI system since the config is used in latter patch. - Select CONFIG_P2SB when CONFIG_LPC_ICH is enabled. - Remove #ifdef CONFIG_X86_INTEL_NON_ACPI and use #if defined(CONFIG_X86_INTEL_NON_ACPI) when lpc_ich_misc is called as suggested by Lee Jones. - Use single dimensional array instead of 2D array for apl_gpio_io_res structure and use DEFINE_RES_IRQ for its IRQ resource. Changes in V3: - Simplify register addresses calculation and use DEFINE_RES_MEM_NAMED defines for apl_gpio_io_res structure - Define magic number for P2SB PCI ID - Replace switch-case with if-else since currently we have only one use case - Only call mfd_add_devices() once for all gpio communities Changes in V2: - Add new config option CONFIG_X86_INTEL_NON_ACPI and "select PINCTRL" to fix kbuildbot error drivers/mfd/Kconfig | 2 + drivers/mfd/Makefile | 4 ++ drivers/mfd/lpc_ich_apl.c | 120 +++++++++++++++++++++++++++++++++++++++++++++ drivers/mfd/lpc_ich_apl.h | 29 +++++++++++ drivers/mfd/lpc_ich_core.c | 5 ++ 5 files changed, 160 insertions(+) create mode 100644 drivers/mfd/lpc_ich_apl.c create mode 100644 drivers/mfd/lpc_ich_apl.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index c6df644..7bb2f7c 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -391,7 +391,9 @@ config MFD_INTEL_QUARK_I2C_GPIO config LPC_ICH tristate "Intel ICH LPC" depends on PCI + depends on X86 && PCI select MFD_CORE + select P2SB help The LPC bridge function of the Intel ICH provides support for many functional units. This driver provides needed support for diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 06a91ea..ccafdfa 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -161,6 +161,10 @@ obj-$(CONFIG_MFD_INTEL_QUARK_I2C_GPIO) += intel_quark_i2c_gpio.o obj-$(CONFIG_LPC_SCH) += lpc_sch.o lpc_ich-objs := lpc_ich_core.o obj-$(CONFIG_LPC_ICH) += lpc_ich.o +lpc_ich-objs := lpc_ich_core.o +ifeq ($(CONFIG_X86_INTEL_IVI),y) +lpc_ich-objs += lpc_ich_apl.o +endif obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o obj-$(CONFIG_MFD_JANZ_CMODIO) += janz-cmodio.o obj-$(CONFIG_MFD_JZ4740_ADC) += jz4740-adc.o diff --git a/drivers/mfd/lpc_ich_apl.c b/drivers/mfd/lpc_ich_apl.c new file mode 100644 index 0000000..7a79052 --- /dev/null +++ b/drivers/mfd/lpc_ich_apl.c @@ -0,0 +1,120 @@ +/* + * Intel Apollo Lake In-Vehicle Infotainment (IVI) systems used in cars support + * + * Copyright (C) 2016 Intel Corporation + * + * Author: Tan, Jui Nee + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include + +#include "lpc_ich_apl.h" + +/* Offset data for Apollo Lake GPIO communities */ +#define APL_GPIO_SOUTHWEST_OFFSET 0xc00000 +#define APL_GPIO_NORTHWEST_OFFSET 0xc40000 +#define APL_GPIO_NORTH_OFFSET 0xc50000 +#define APL_GPIO_WEST_OFFSET 0xc70000 + +#define APL_GPIO_SOUTHWEST_NPIN 43 +#define APL_GPIO_NORTHWEST_NPIN 77 +#define APL_GPIO_NORTH_NPIN 78 +#define APL_GPIO_WEST_NPIN 47 + +#define APL_GPIO_COMMUNITY_MAX 4 + +#define APL_GPIO_IRQ 14 + +#define PCI_IDSEL_P2SB 0x0d + +static struct resource apl_gpio_io_res[] = { + DEFINE_RES_MEM_NAMED(APL_GPIO_NORTH_OFFSET, + APL_GPIO_NORTH_NPIN * SZ_8, "apl_pinctrl_n"), + DEFINE_RES_MEM_NAMED(APL_GPIO_NORTHWEST_OFFSET, + APL_GPIO_NORTHWEST_NPIN * SZ_8, "apl_pinctrl_nw"), + DEFINE_RES_MEM_NAMED(APL_GPIO_WEST_OFFSET, + APL_GPIO_WEST_NPIN * SZ_8, "apl_pinctrl_w"), + DEFINE_RES_MEM_NAMED(APL_GPIO_SOUTHWEST_OFFSET, + APL_GPIO_SOUTHWEST_NPIN * SZ_8, "apl_pinctrl_sw"), + DEFINE_RES_IRQ(APL_GPIO_IRQ), +}; + +static struct mfd_cell apl_gpio_devices[] = { + { + .name = "apl-pinctrl", + .id = 0, + .num_resources = ARRAY_SIZE(apl_gpio_io_res), + .resources = &apl_gpio_io_res[0], + .ignore_resource_conflicts = true, + }, + { + .name = "apl-pinctrl", + .id = 1, + .num_resources = ARRAY_SIZE(apl_gpio_io_res), + .resources = &apl_gpio_io_res[1], + .ignore_resource_conflicts = true, + }, + { + .name = "apl-pinctrl", + .id = 2, + .num_resources = ARRAY_SIZE(apl_gpio_io_res), + .resources = &apl_gpio_io_res[2], + .ignore_resource_conflicts = true, + }, + { + .name = "apl-pinctrl", + .id = 3, + .num_resources = ARRAY_SIZE(apl_gpio_io_res), + .resources = &apl_gpio_io_res[3], + .ignore_resource_conflicts = true, + }, +}; + +int lpc_ich_add_gpio(struct pci_dev *dev, enum lpc_chipsets chipset) +{ + unsigned int i; + int ret; + struct resource base; + + if (chipset != LPC_APL) + return -ENODEV; + /* + * Apollo lake, has not 1, but 4 gpio controllers, + * handle it a bit differently. + */ + + ret = p2sb_bar(dev, PCI_DEVFN(PCI_IDSEL_P2SB, 0), &base); + if (ret) + goto warn_continue; + + for (i = 0; i < APL_GPIO_COMMUNITY_MAX; i++) { + struct resource *res = &apl_gpio_io_res[i]; + + /* Fill MEM resource */ + res->start += base.start; + res->end += base.start; + res->flags = base.flags; + + res++; + } + + ret = mfd_add_devices(&dev->dev, 0, + apl_gpio_devices, ARRAY_SIZE(apl_gpio_devices), + NULL, 0, NULL); + + if (ret) +warn_continue: + dev_warn(&dev->dev, + "Failed to add Apollo Lake GPIO: %d\n", + ret); + + return ret; +} diff --git a/drivers/mfd/lpc_ich_apl.h b/drivers/mfd/lpc_ich_apl.h new file mode 100644 index 0000000..43fcc99 --- /dev/null +++ b/drivers/mfd/lpc_ich_apl.h @@ -0,0 +1,29 @@ +/* + * lpc_ich_apl.h - Intel In-Vehicle Infotainment (IVI) systems used in cars + * support + * + * Copyright (C) 2016, Intel Corporation + * + * Author: Tan, Jui Nee + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __LPC_ICH_APL_H__ +#define __LPC_ICH_APL_H__ + +#include + +#if IS_ENABLED(CONFIG_X86_INTEL_IVI) +int lpc_ich_add_gpio(struct pci_dev *dev, enum lpc_chipsets chipset); +#else /* CONFIG_X86_INTEL_IVI is not set */ +static inline int lpc_ich_add_gpio(struct pci_dev *dev, + enum lpc_chipsets chipset) +{ + return -ENODEV; +} +#endif + +#endif diff --git a/drivers/mfd/lpc_ich_core.c b/drivers/mfd/lpc_ich_core.c index 27e7e63..5d7a44e 100644 --- a/drivers/mfd/lpc_ich_core.c +++ b/drivers/mfd/lpc_ich_core.c @@ -70,6 +70,8 @@ #include #include +#include "lpc_ich_apl.h" + #define ACPIBASE 0x40 #define ACPIBASE_GPE_OFF 0x28 #define ACPIBASE_GPE_END 0x2f @@ -1032,6 +1034,9 @@ static int lpc_ich_probe(struct pci_dev *dev, cell_added = true; } + if (!lpc_ich_add_gpio(dev, priv->chipset)) + cell_added = true; + /* * We only care if at least one or none of the cells registered * successfully. -- 1.9.1