From 9ac747ebc893a9c58099e60de8cd82cbeefede99 Mon Sep 17 00:00:00 2001 From: Fenglin Wu Date: Sun, 19 Apr 2026 19:25:52 -0700 Subject: [PATCH 1/4] dt-bindings: spmi: glymur-spmi-pmic-arb: Add compatible for Qualcomm Hawi SoC The PMIC arbiter in the Qualcomm Hawi SoC is version v8.5, which introduces parity and CRC checks for data received from the PMIC, as well as NACK checks for command sequences except for read. All other features in PMIC arbiter remain the same as the one in the Qualcomm Glymur SoC, with the only differences being some additional error status checks. Therefore, add a string for "qcom,hawi-spmi-pmic-arb" as a compatible entry for "qcom,glymur-spmi-pmic-arb". Signed-off-by: Fenglin Wu Reviewed-by: Krzysztof Kozlowski Signed-off-by: Stephen Boyd --- .../devicetree/bindings/spmi/qcom,glymur-spmi-pmic-arb.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/spmi/qcom,glymur-spmi-pmic-arb.yaml b/Documentation/devicetree/bindings/spmi/qcom,glymur-spmi-pmic-arb.yaml index 3b5005b96c6d..1593a1183a36 100644 --- a/Documentation/devicetree/bindings/spmi/qcom,glymur-spmi-pmic-arb.yaml +++ b/Documentation/devicetree/bindings/spmi/qcom,glymur-spmi-pmic-arb.yaml @@ -25,6 +25,7 @@ properties: oneOf: - items: - enum: + - qcom,hawi-spmi-pmic-arb - qcom,kaanapali-spmi-pmic-arb - const: qcom,glymur-spmi-pmic-arb - enum: From e08ee0e3b521aeffefcb0438a48e17e81af66eae Mon Sep 17 00:00:00 2001 From: Fenglin Wu Date: Sun, 19 Apr 2026 19:25:53 -0700 Subject: [PATCH 2/4] spmi: spmi-pmic-arb: add support for PMIC arbiter v8.5 PMIC arbiter v8.5 is an extension of PMIC arbiter v8 that updated the definition of the channel status register bit fields. Add support to handle this difference. Signed-off-by: Fenglin Wu Reviewed-by: Dmitry Baryshkov Signed-off-by: Stephen Boyd --- drivers/spmi/spmi-pmic-arb.c | 142 +++++++++++++++++++++++++++-------- 1 file changed, 112 insertions(+), 30 deletions(-) diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 69f8d456324a..2e2cb4774103 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -28,6 +28,7 @@ #define PMIC_ARB_VERSION_V5_MIN 0x50000000 #define PMIC_ARB_VERSION_V7_MIN 0x70000000 #define PMIC_ARB_VERSION_V8_MIN 0x80000000 +#define PMIC_ARB_VERSION_V8P5_MIN 0x80050000 #define PMIC_ARB_INT_EN 0x0004 #define PMIC_ARB_FEATURES 0x0004 @@ -62,14 +63,6 @@ /* Ownership Table */ #define SPMI_OWNERSHIP_PERIPH2OWNER(X) ((X) & 0x7) -/* Channel Status fields */ -enum pmic_arb_chnl_status { - PMIC_ARB_STATUS_DONE = BIT(0), - PMIC_ARB_STATUS_FAILURE = BIT(1), - PMIC_ARB_STATUS_DENIED = BIT(2), - PMIC_ARB_STATUS_DROPPED = BIT(3), -}; - /* Command register fields */ #define PMIC_ARB_CMD_MAX_BYTE_COUNT 8 @@ -239,6 +232,7 @@ struct spmi_pmic_arb { * on v2 address of SPMI_PIC_IRQ_CLEARn. * @apid_map_offset: offset of PMIC_ARB_REG_CHNLn * @apid_owner: on v2 and later address of SPMI_PERIPHn_2OWNER_TABLE_REG + * @check_chnl_status: checks channel status and returns error code if any */ struct pmic_arb_ver_ops { const char *ver_str; @@ -261,6 +255,8 @@ struct pmic_arb_ver_ops { void __iomem *(*irq_clear)(struct spmi_pmic_arb_bus *bus, u16 n); u32 (*apid_map_offset)(u16 n); void __iomem *(*apid_owner)(struct spmi_pmic_arb_bus *bus, u16 n); + int (*check_chnl_status)(struct spmi_controller *ctrl, u32 status, + u8 sid, u16 addr, u32 offset); }; static inline void pmic_arb_base_write(struct spmi_pmic_arb *pmic_arb, @@ -306,6 +302,84 @@ static void pmic_arb_write_data(struct spmi_pmic_arb *pmic_arb, const u8 *buf, __raw_writel(data, pmic_arb->wr_base + reg); } +static int pmic_arb_check_chnl_status_v1(struct spmi_controller *ctrl, + u32 status, u8 sid, u16 addr, + u32 offset) +{ + /* Check if DONE bit is set */ + if (!(status & BIT(0))) + return -EAGAIN; + + if (status & BIT(1)) { + dev_err(&ctrl->dev, "%s: %#x %#x: transaction failed (%#x) reg: 0x%x\n", + __func__, sid, addr, status, offset); + WARN_ON(1); + return -EIO; + } + + if (status & BIT(2)) { + dev_err(&ctrl->dev, "%s: %#x %#x: transaction denied (%#x)\n", + __func__, sid, addr, status); + return -EPERM; + } + + if (status & BIT(3)) { + dev_err(&ctrl->dev, "%s: %#x %#x: transaction dropped (%#x)\n", + __func__, sid, addr, status); + return -EIO; + } + + return 0; +} + +static int pmic_arb_check_chnl_status_v8p5(struct spmi_controller *ctrl, + u32 status, u8 sid, u16 addr, + u32 offset) +{ + /* Check if DONE bit is set */ + if (!(status & BIT(0))) + return -EAGAIN; + + if (status & BIT(1)) { + dev_err(&ctrl->dev, "%s: %#x %#x: transaction failed (%#x) reg: 0x%x\n", + __func__, sid, addr, status, offset); + WARN_ON(1); + return -EIO; + } + + if (status & BIT(2)) { + dev_err(&ctrl->dev, "%s: %#x %#x: CRC error (%#x)\n", + __func__, sid, addr, status); + return -EIO; + } + + if (status & BIT(3)) { + dev_err(&ctrl->dev, "%s: %#x %#x: parity error (%#x)\n", + __func__, sid, addr, status); + return -EIO; + } + + if (status & BIT(4)) { + dev_err(&ctrl->dev, "%s: %#x %#x: NACK error (%#x)\n", + __func__, sid, addr, status); + return -EIO; + } + + if (status & BIT(5)) { + dev_err(&ctrl->dev, "%s: %#x %#x: transaction denied (%#x)\n", + __func__, sid, addr, status); + return -EPERM; + } + + if (status & BIT(6)) { + dev_err(&ctrl->dev, "%s: %#x %#x: transaction dropped (%#x)\n", + __func__, sid, addr, status); + return -EIO; + } + + return 0; +} + static int pmic_arb_wait_for_done(struct spmi_controller *ctrl, void __iomem *base, u8 sid, u16 addr, enum pmic_arb_channel ch_type) @@ -327,28 +401,10 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl, while (timeout--) { status = readl_relaxed(base + offset); - if (status & PMIC_ARB_STATUS_DONE) { - if (status & PMIC_ARB_STATUS_DENIED) { - dev_err(&ctrl->dev, "%s: %#x %#x: transaction denied (%#x)\n", - __func__, sid, addr, status); - return -EPERM; - } + rc = pmic_arb->ver_ops->check_chnl_status(ctrl, status, sid, addr, offset); + if (rc != -EAGAIN) + return rc; - if (status & PMIC_ARB_STATUS_FAILURE) { - dev_err(&ctrl->dev, "%s: %#x %#x: transaction failed (%#x) reg: 0x%x\n", - __func__, sid, addr, status, offset); - WARN_ON(1); - return -EIO; - } - - if (status & PMIC_ARB_STATUS_DROPPED) { - dev_err(&ctrl->dev, "%s: %#x %#x: transaction dropped (%#x)\n", - __func__, sid, addr, status); - return -EIO; - } - - return 0; - } udelay(1); } @@ -1768,6 +1824,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = { .irq_clear = pmic_arb_irq_clear_v1, .apid_map_offset = pmic_arb_apid_map_offset_v2, .apid_owner = pmic_arb_apid_owner_v2, + .check_chnl_status = pmic_arb_check_chnl_status_v1, }; static const struct pmic_arb_ver_ops pmic_arb_v2 = { @@ -1784,6 +1841,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = { .irq_clear = pmic_arb_irq_clear_v2, .apid_map_offset = pmic_arb_apid_map_offset_v2, .apid_owner = pmic_arb_apid_owner_v2, + .check_chnl_status = pmic_arb_check_chnl_status_v1, }; static const struct pmic_arb_ver_ops pmic_arb_v3 = { @@ -1800,6 +1858,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = { .irq_clear = pmic_arb_irq_clear_v2, .apid_map_offset = pmic_arb_apid_map_offset_v2, .apid_owner = pmic_arb_apid_owner_v2, + .check_chnl_status = pmic_arb_check_chnl_status_v1, }; static const struct pmic_arb_ver_ops pmic_arb_v5 = { @@ -1816,6 +1875,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = { .irq_clear = pmic_arb_irq_clear_v5, .apid_map_offset = pmic_arb_apid_map_offset_v5, .apid_owner = pmic_arb_apid_owner_v2, + .check_chnl_status = pmic_arb_check_chnl_status_v1, }; static const struct pmic_arb_ver_ops pmic_arb_v7 = { @@ -1832,6 +1892,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v7 = { .irq_clear = pmic_arb_irq_clear_v7, .apid_map_offset = pmic_arb_apid_map_offset_v7, .apid_owner = pmic_arb_apid_owner_v7, + .check_chnl_status = pmic_arb_check_chnl_status_v1, }; static const struct pmic_arb_ver_ops pmic_arb_v8 = { @@ -1849,6 +1910,25 @@ static const struct pmic_arb_ver_ops pmic_arb_v8 = { .irq_clear = pmic_arb_irq_clear_v8, .apid_map_offset = pmic_arb_apid_map_offset_v8, .apid_owner = pmic_arb_apid_owner_v8, + .check_chnl_status = pmic_arb_check_chnl_status_v1, +}; + +static const struct pmic_arb_ver_ops pmic_arb_v8p5 = { + .ver_str = "v8.5", + .get_core_resources = pmic_arb_get_core_resources_v8, + .get_bus_resources = pmic_arb_get_bus_resources_v8, + .init_apid = pmic_arb_init_apid_v8, + .ppid_to_apid = pmic_arb_ppid_to_apid_v5, + .non_data_cmd = pmic_arb_non_data_cmd_v2, + .offset = pmic_arb_offset_v8, + .fmt_cmd = pmic_arb_fmt_cmd_v2, + .owner_acc_status = pmic_arb_owner_acc_status_v7, + .acc_enable = pmic_arb_acc_enable_v8, + .irq_status = pmic_arb_irq_status_v8, + .irq_clear = pmic_arb_irq_clear_v8, + .apid_map_offset = pmic_arb_apid_map_offset_v8, + .apid_owner = pmic_arb_apid_owner_v8, + .check_chnl_status = pmic_arb_check_chnl_status_v8p5, }; static const struct irq_domain_ops pmic_arb_irq_domain_ops = { @@ -2030,8 +2110,10 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) pmic_arb->ver_ops = &pmic_arb_v5; else if (hw_ver < PMIC_ARB_VERSION_V8_MIN) pmic_arb->ver_ops = &pmic_arb_v7; - else + else if (hw_ver < PMIC_ARB_VERSION_V8P5_MIN) pmic_arb->ver_ops = &pmic_arb_v8; + else + pmic_arb->ver_ops = &pmic_arb_v8p5; err = pmic_arb->ver_ops->get_core_resources(pdev, core); if (err) From 0c766f0f08ea681396814fd82eddd299da188625 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Thu, 16 Apr 2026 15:48:33 -0700 Subject: [PATCH 3/4] spmi: clean up kernel-doc in spmi.h Fix all kernel-doc warnings in spmi.h: Warning: include/linux/spmi.h:114 function parameter 'ctrl' not described in 'spmi_controller_put' Warning: include/linux/spmi.h:144 struct member 'shutdown' not described in 'spmi_driver' Signed-off-by: Randy Dunlap Signed-off-by: Stephen Boyd --- include/linux/spmi.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/spmi.h b/include/linux/spmi.h index 28e8c8bd3944..671ce1b3ee8e 100644 --- a/include/linux/spmi.h +++ b/include/linux/spmi.h @@ -109,7 +109,7 @@ struct spmi_controller *spmi_controller_alloc(struct device *parent, /** * spmi_controller_put() - decrement controller refcount - * @ctrl SPMI controller. + * @ctrl: SPMI controller. */ static inline void spmi_controller_put(struct spmi_controller *ctrl) { @@ -129,6 +129,7 @@ int devm_spmi_controller_add(struct device *parent, struct spmi_controller *ctrl * this structure. * @probe: binds this driver to a SPMI device. * @remove: unbinds this driver from the SPMI device. + * @shutdown: shuts down this driver. * * If PM runtime support is desired for a slave, a device driver can call * pm_runtime_put() from their probe() routine (and a balancing From 3443eec9c55d128064c83225a9111f1a1a37277a Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Thu, 26 Mar 2026 19:41:43 -0700 Subject: [PATCH 4/4] spmi: use kzalloc_flex in main allocation Add a flexible array member to avoid indexing past the struct. Signed-off-by: Rosen Penev Signed-off-by: Stephen Boyd --- drivers/spmi/spmi.c | 4 ++-- include/linux/spmi.h | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c index e889b129f3ac..57b7c0cb4240 100644 --- a/drivers/spmi/spmi.c +++ b/drivers/spmi/spmi.c @@ -450,7 +450,7 @@ struct spmi_controller *spmi_controller_alloc(struct device *parent, if (WARN_ON(!parent)) return ERR_PTR(-EINVAL); - ctrl = kzalloc(sizeof(*ctrl) + size, GFP_KERNEL); + ctrl = kzalloc_flex(*ctrl, priv, size); if (!ctrl) return ERR_PTR(-ENOMEM); @@ -459,7 +459,7 @@ struct spmi_controller *spmi_controller_alloc(struct device *parent, ctrl->dev.bus = &spmi_bus_type; ctrl->dev.parent = parent; ctrl->dev.of_node = parent->of_node; - spmi_controller_set_drvdata(ctrl, &ctrl[1]); + spmi_controller_set_drvdata(ctrl, ctrl->priv); id = ida_alloc(&ctrl_ida, GFP_KERNEL); if (id < 0) { diff --git a/include/linux/spmi.h b/include/linux/spmi.h index 671ce1b3ee8e..4eb9564a7fb3 100644 --- a/include/linux/spmi.h +++ b/include/linux/spmi.h @@ -76,6 +76,7 @@ void spmi_device_remove(struct spmi_device *sdev); * @cmd: sends a non-data command sequence on the SPMI bus. * @read_cmd: sends a register read command sequence on the SPMI bus. * @write_cmd: sends a register write command sequence on the SPMI bus. + * @priv: array of private data. */ struct spmi_controller { struct device dev; @@ -85,6 +86,7 @@ struct spmi_controller { u8 sid, u16 addr, u8 *buf, size_t len); int (*write_cmd)(struct spmi_controller *ctrl, u8 opcode, u8 sid, u16 addr, const u8 *buf, size_t len); + u8 priv[]; }; static inline struct spmi_controller *to_spmi_controller(struct device *d)