Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752809AbZJZVA1 (ORCPT ); Mon, 26 Oct 2009 17:00:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752728AbZJZVAZ (ORCPT ); Mon, 26 Oct 2009 17:00:25 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:34887 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752309AbZJZVAX (ORCPT ); Mon, 26 Oct 2009 17:00:23 -0400 Date: Mon, 26 Oct 2009 14:00:24 -0700 From: "Darrick J. Wong" To: Jean Delvare Cc: Crane Cai , Bjorn Helgaas , lenb@kernel.org, linux-kernel , linux-i2c@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH v2 2/2] i2c-scmi: support IBM SMBus CMI devices Message-ID: <20091026210024.GS26149@tux1.beaverton.ibm.com> Reply-To: djwong@us.ibm.com References: <20091020231149.GM26149@tux1.beaverton.ibm.com> <20091021023016.GC32413@crane-desktop> <200910210857.13978.bjorn.helgaas@hp.com> <20091021173733.GN26149@tux1.beaverton.ibm.com> <20091022071748.GA17917@crane-desktop> <20091022174304.GO26149@tux1.beaverton.ibm.com> <20091023044451.GB1367@crane-desktop> <20091023170311.GC21723@tux1.beaverton.ibm.com> <20091025125353.55d3bfad@hyperion.delvare> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20091025125353.55d3bfad@hyperion.delvare> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3860 Lines: 116 From: Crane Cai *) add a new HID for IBM SMBus CMI devices *) add methods for IBM SMBus CMI devices *) hook different HID with different control methods set *) minor tweaks as suggested by Jean Delvare Slightly modified by Darrick to use #define'd IBM SMBUS HID from Darrick's ACPI scan quirk patch. Signed-off-by: Darrick J. Wong Signed-off-by: Crane Cai --- drivers/i2c/busses/i2c-scmi.c | 31 +++++++++++++++++++++++-------- 1 files changed, 23 insertions(+), 8 deletions(-) diff --git a/drivers/i2c/busses/i2c-scmi.c b/drivers/i2c/busses/i2c-scmi.c index b4a55d4..7860cbb 100644 --- a/drivers/i2c/busses/i2c-scmi.c +++ b/drivers/i2c/busses/i2c-scmi.c @@ -33,6 +33,7 @@ struct acpi_smbus_cmi { u8 cap_info:1; u8 cap_read:1; u8 cap_write:1; + struct smbus_methods_t *methods; }; static const struct smbus_methods_t smbus_methods = { @@ -41,8 +42,16 @@ static const struct smbus_methods_t smbus_methods = { .mt_sbw = "_SBW", }; +/* Some IBM BIOSes omit the leading underscore */ +static const struct smbus_methods_t ibm_smbus_methods = { + .mt_info = "SBI_", + .mt_sbr = "SBR_", + .mt_sbw = "SBW_", +}; + static const struct acpi_device_id acpi_smbus_cmi_ids[] = { - {"SMBUS01", 0}, + {"SMBUS01", (kernel_ulong_t)&smbus_methods}, + {ACPI_SMBUS_IBM_HID, (kernel_ulong_t)&ibm_smbus_methods}, {"", 0} }; @@ -150,11 +159,11 @@ acpi_smbus_cmi_access(struct i2c_adapter *adap, u16 addr, unsigned short flags, if (read_write == I2C_SMBUS_READ) { protocol |= ACPI_SMBUS_PRTCL_READ; - method = smbus_methods.mt_sbr; + method = smbus_cmi->methods->mt_sbr; input.count = 3; } else { protocol |= ACPI_SMBUS_PRTCL_WRITE; - method = smbus_methods.mt_sbw; + method = smbus_cmi->methods->mt_sbw; input.count = 5; } @@ -290,13 +299,13 @@ static int acpi_smbus_cmi_add_cap(struct acpi_smbus_cmi *smbus_cmi, union acpi_object *obj; acpi_status status; - if (!strcmp(name, smbus_methods.mt_info)) { + if (!strcmp(name, smbus_cmi->methods->mt_info)) { status = acpi_evaluate_object(smbus_cmi->handle, - smbus_methods.mt_info, + smbus_cmi->methods->mt_info, NULL, &buffer); if (ACPI_FAILURE(status)) { ACPI_ERROR((AE_INFO, "Evaluating %s: %i", - smbus_methods.mt_info, status)); + smbus_cmi->methods->mt_info, status)); return -EIO; } @@ -319,9 +328,9 @@ static int acpi_smbus_cmi_add_cap(struct acpi_smbus_cmi *smbus_cmi, kfree(buffer.pointer); smbus_cmi->cap_info = 1; - } else if (!strcmp(name, smbus_methods.mt_sbr)) + } else if (!strcmp(name, smbus_cmi->methods->mt_sbr)) smbus_cmi->cap_read = 1; - else if (!strcmp(name, smbus_methods.mt_sbw)) + else if (!strcmp(name, smbus_cmi->methods->mt_sbw)) smbus_cmi->cap_write = 1; else ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unsupported CMI method: %s\n", @@ -349,6 +358,7 @@ static acpi_status acpi_smbus_cmi_query_methods(acpi_handle handle, u32 level, static int acpi_smbus_cmi_add(struct acpi_device *device) { struct acpi_smbus_cmi *smbus_cmi; + const struct acpi_device_id *id; smbus_cmi = kzalloc(sizeof(struct acpi_smbus_cmi), GFP_KERNEL); if (!smbus_cmi) @@ -362,6 +372,11 @@ static int acpi_smbus_cmi_add(struct acpi_device *device) smbus_cmi->cap_read = 0; smbus_cmi->cap_write = 0; + for (id = acpi_smbus_cmi_ids; id->id[0]; id++) + if (!strcmp(id->id, acpi_device_hid(device))) + smbus_cmi->methods = + (struct smbus_methods_t *) id->driver_data; + acpi_walk_namespace(ACPI_TYPE_METHOD, smbus_cmi->handle, 1, acpi_smbus_cmi_query_methods, smbus_cmi, NULL); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/