{"id":2228146,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2228146/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260425131721.932250-14-joel@jms.id.au/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260425131721.932250-14-joel@jms.id.au>","date":"2026-04-25T13:17:19","name":"[v4,13/13] hw/riscv/atlantis: Add some i2c peripherals","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"5346d584ad0a88fad258e9b21a12b709d35b42e9","submitter":{"id":48628,"url":"http://patchwork.ozlabs.org/api/1.1/people/48628/?format=json","name":"Joel Stanley","email":"joel@jms.id.au"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260425131721.932250-14-joel@jms.id.au/mbox/","series":[{"id":501439,"url":"http://patchwork.ozlabs.org/api/1.1/series/501439/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501439","date":"2026-04-25T13:17:08","name":"hw/riscv: Add the Tenstorrent Atlantis machine","version":4,"mbox":"http://patchwork.ozlabs.org/series/501439/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2228146/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2228146/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=Itbrf03i;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g2r6S0SJTz1yHv\n\tfor ; Sat, 25 Apr 2026 23:20:16 +1000 (AEST)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1wGcvF-0008Fx-Sx; Sat, 25 Apr 2026 09:19:50 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1wGcul-0007i2-TK\n for qemu-devel@nongnu.org; Sat, 25 Apr 2026 09:19:22 -0400","from mail-pf1-x42a.google.com ([2607:f8b0:4864:20::42a])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from )\n id 1wGcui-0000NT-Eo\n for qemu-devel@nongnu.org; Sat, 25 Apr 2026 09:19:18 -0400","by mail-pf1-x42a.google.com with SMTP id\n d2e1a72fcca58-83178c0f29cso1816563b3a.0\n for ; Sat, 25 Apr 2026 06:19:15 -0700 (PDT)","from donnager-debian.. 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These are not present\non the board but help for testing.\n\nThe tmp105 is a lm75 compatible temperature sensor used by the\nSENSORS_LM75 Linux kernel driver.\n\nThe ds1338 is a RTC device that is used by the RTC_DRV_DS1307 Linux\nkernel driver.\n\nReviewed-by: Philippe Mathieu-Daudé \nSigned-off-by: Joel Stanley \n---\nv4:\n - Place i2c on bus 0 and 4\n - lm75 compatible to tmp105, which is same qemu model and linux driver\n - Mention the kernel drivers in the commit message\nv3: Use HWADDR_PRIX in i2c device string consistent\n---\n hw/riscv/tt_atlantis.c | 27 +++++++++++++++++++++++++++\n hw/riscv/Kconfig | 2 ++\n 2 files changed, 29 insertions(+)","diff":"diff --git a/hw/riscv/tt_atlantis.c b/hw/riscv/tt_atlantis.c\nindex d517d0aee2d1..521748af1b99 100644\n--- a/hw/riscv/tt_atlantis.c\n+++ b/hw/riscv/tt_atlantis.c\n@@ -94,6 +94,13 @@ static const PciMapEntry tt_atlantis_pci_map[] = {\n FDT_PCI_RANGE_PREFETCHABLE },\n };\n \n+static I2CBus *i2c_get_bus(TTAtlantisState *s, unsigned busnr)\n+{\n+ assert(busnr < TT_ATL_NUM_I2C);\n+\n+ return s->i2c[busnr].bus;\n+}\n+\n static uint32_t next_phandle(void)\n {\n static uint32_t phandle = 1;\n@@ -514,6 +521,19 @@ static void create_fdt_i2c(void *fdt, const MemMapEntry *mem, uint32_t irq,\n qemu_fdt_setprop_cell(fdt, name, \"#size-cells\", 0);\n }\n \n+static void create_fdt_i2c_device(TTAtlantisState *s, int bus,\n+ const char *compat, int addr)\n+{\n+ void *fdt = MACHINE(s)->fdt;\n+ hwaddr base = s->memmap[TT_ATL_I2C0 + bus].base;\n+ g_autofree char *name = g_strdup_printf(\"/soc/i2c@%\"HWADDR_PRIX\"/sensor@%x\",\n+ base, addr);\n+\n+ qemu_fdt_add_subnode(fdt, name);\n+ qemu_fdt_setprop_string(fdt, name, \"compatible\", compat);\n+ qemu_fdt_setprop_cell(fdt, name, \"reg\", addr);\n+}\n+\n static void finalize_fdt(TTAtlantisState *s)\n {\n uint32_t aplic_s_phandle = next_phandle();\n@@ -552,6 +572,9 @@ static void finalize_fdt(TTAtlantisState *s)\n TT_ATL_I2C0_IRQ + i,\n aplic_s_phandle, periph_clk_phandle);\n }\n+\n+ create_fdt_i2c_device(s, 0, \"dallas,ds1338\", 0x6f);\n+ create_fdt_i2c_device(s, 4, \"ti,tmp105\", 0x48);\n }\n \n static void create_fdt(TTAtlantisState *s)\n@@ -874,6 +897,10 @@ static void tt_atlantis_machine_init(MachineState *machine)\n qdev_get_gpio_in(s->irqchip, TT_ATL_I2C0_IRQ + i));\n }\n \n+ /* I2C peripherals: qemu specific */\n+ i2c_slave_create_simple(i2c_get_bus(s, 0), \"ds1338\", 0x6f);\n+ i2c_slave_create_simple(i2c_get_bus(s, 4), \"tmp105\", 0x48);\n+\n /* Load or create device tree */\n if (machine->dtb) {\n machine->fdt = load_device_tree(machine->dtb, &s->fdt_size);\ndiff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig\nindex 2db8f409b926..6ad7b3e07e9e 100644\n--- a/hw/riscv/Kconfig\n+++ b/hw/riscv/Kconfig\n@@ -136,6 +136,8 @@ config TENSTORRENT\n select RISCV_IMSIC\n select FW_CFG_DMA\n select DESIGNWARE_I2C\n+ select DS1338\n+ select TMP105\n \n config XIANGSHAN_KUNMINGHU\n bool\n","prefixes":["v4","13/13"]}