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Mon, 7 Feb 2022 23:13:36 +0000 (GMT) From: Eddie James To: openbmc@lists.ozlabs.org Subject: [PATCH u-boot v2019.04-aspeed-openbmc v4 1/6] dm: Add a No-op uclass Date: Mon, 7 Feb 2022 17:13:29 -0600 Message-Id: <20220207231334.59845-2-eajames@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220207231334.59845-1-eajames@linux.ibm.com> References: <20220207231334.59845-1-eajames@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: CakFeK0MZRrRddbXv5TqvnTPSqO3ppAz X-Proofpoint-ORIG-GUID: CakFeK0MZRrRddbXv5TqvnTPSqO3ppAz Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-07_07,2022-02-07_02,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 suspectscore=0 phishscore=0 clxscore=1015 impostorscore=0 priorityscore=1501 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202070126 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: andrew@aj.id.au Errors-To: openbmc-bounces+openbmc=archiver.kernel.org@lists.ozlabs.org Sender: "openbmc" From: Jean-Jacques Hiblot This uclass is intended for devices that do not need any features from the uclass, including binding children. This will typically be used by devices that are used to bind child devices but do not use dm_scan_fdt_dev() to do it. That is for example the case of several USB wrappers that have 2 child devices (1 for device and 1 for host) but bind only one at a any given time. (cherry-picked from 07e33711fec4f1106f36805b5dc830da07c783c5) Signed-off-by: Jean-Jacques Hiblot Reviewed-by: Simon Glass Signed-off-by: Eddie James --- arch/sandbox/dts/test.dts | 12 +++++++ drivers/core/uclass.c | 5 +++ include/dm/uclass-id.h | 1 + test/dm/Makefile | 1 + test/dm/nop.c | 73 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 92 insertions(+) create mode 100644 test/dm/nop.c diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts index 87d8e5bcc9..b705161086 100644 --- a/arch/sandbox/dts/test.dts +++ b/arch/sandbox/dts/test.dts @@ -400,6 +400,18 @@ sandbox,silent; /* Don't emit sounds while testing */ }; + nop-test_0 { + compatible = "sandbox,nop_sandbox1"; + nop-test_1 { + compatible = "sandbox,nop_sandbox2"; + bind = "True"; + }; + nop-test_2 { + compatible = "sandbox,nop_sandbox2"; + bind = "False"; + }; + }; + misc-test { compatible = "sandbox,misc_sandbox"; }; diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c index fc3157de39..dc9eb62893 100644 --- a/drivers/core/uclass.c +++ b/drivers/core/uclass.c @@ -757,3 +757,8 @@ int uclass_pre_remove_device(struct udevice *dev) return 0; } #endif + +UCLASS_DRIVER(nop) = { + .id = UCLASS_NOP, + .name = "nop", +}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 13ae6e1e4c..281c0d6ed2 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -62,6 +62,7 @@ enum uclass_id { UCLASS_MMC, /* SD / MMC card or chip */ UCLASS_MOD_EXP, /* RSA Mod Exp device */ UCLASS_MTD, /* Memory Technology Device (MTD) device */ + UCLASS_NOP, /* No-op devices */ UCLASS_NORTHBRIDGE, /* Intel Northbridge / SDRAM controller */ UCLASS_NVME, /* NVM Express device */ UCLASS_PANEL, /* Display panel, such as an LCD */ diff --git a/test/dm/Makefile b/test/dm/Makefile index 49857c5092..aeb3aa0ca7 100644 --- a/test/dm/Makefile +++ b/test/dm/Makefile @@ -3,6 +3,7 @@ # Copyright (c) 2013 Google, Inc obj-$(CONFIG_UT_DM) += bus.o +obj-$(CONFIG_UT_DM) += nop.o obj-$(CONFIG_UT_DM) += test-driver.o obj-$(CONFIG_UT_DM) += test-fdt.o obj-$(CONFIG_UT_DM) += test-main.o diff --git a/test/dm/nop.c b/test/dm/nop.c new file mode 100644 index 0000000000..2df29f3d15 --- /dev/null +++ b/test/dm/nop.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Test for the NOP uclass + * + * (C) Copyright 2019 - Texas Instruments Incorporated - http://www.ti.com/ + * Jean-Jacques Hiblot + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static int noptest_bind(struct udevice *parent) +{ + ofnode ofnode = dev_read_first_subnode(parent); + + while (ofnode_valid(ofnode)) { + struct udevice *dev; + const char *bind_flag = ofnode_read_string(ofnode, "bind"); + + if (bind_flag && (strcmp(bind_flag, "True") == 0)) + lists_bind_fdt(parent, ofnode, &dev, false); + ofnode = dev_read_next_subnode(ofnode); + } + + return 0; +} + +static const struct udevice_id noptest1_ids[] = { + { + .compatible = "sandbox,nop_sandbox1", + }, + { } +}; + +U_BOOT_DRIVER(noptest_drv1) = { + .name = "noptest1_drv", + .of_match = noptest1_ids, + .id = UCLASS_NOP, + .bind = noptest_bind, +}; + +static const struct udevice_id noptest2_ids[] = { + { + .compatible = "sandbox,nop_sandbox2", + }, + { } +}; + +U_BOOT_DRIVER(noptest_drv2) = { + .name = "noptest2_drv", + .of_match = noptest2_ids, + .id = UCLASS_NOP, +}; + +static int dm_test_nop(struct unit_test_state *uts) +{ + struct udevice *dev; + + ut_assertok(uclass_get_device_by_name(UCLASS_NOP, "nop-test_0", &dev)); + ut_assertok(uclass_get_device_by_name(UCLASS_NOP, "nop-test_1", &dev)); + ut_asserteq(-ENODEV, + uclass_get_device_by_name(UCLASS_NOP, "nop-test_2", &dev)); + + return 0; +} + +DM_TEST(dm_test_nop, DM_TESTF_FLAT_TREE | DM_TESTF_SCAN_FDT); -- 2.27.0