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Wed, 14 Feb 2024 13:14:02 -0800 (PST) From: Abel Vesa Date: Wed, 14 Feb 2024 23:13:47 +0200 Subject: [PATCH RFC v3 2/4] spmi: pmic-arb: Make the APID init a version operation Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240214-spmi-multi-master-support-v3-2-0bae0ef04faf@linaro.org> References: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org> In-Reply-To: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org> To: Stephen Boyd , Matthias Brugger , Bjorn Andersson , Konrad Dybcio , Dmitry Baryshkov , Neil Armstrong , AngeloGioacchino Del Regno Cc: Srini Kandagatla , Johan Hovold , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, Abel Vesa X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; 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a=openpgp; fpr=6AFF162D57F4223A8770EF5AF7BF214136F41FAE Rather than using conditionals in probe function, add the APID init as a version specific operation. Due to v7, which supports multiple buses, pass on the bus index to be used for sorting out the apid base and count. Signed-off-by: Abel Vesa --- drivers/spmi/spmi-pmic-arb.c | 199 +++++++++++++++++++++++++++------------= ---- 1 file changed, 124 insertions(+), 75 deletions(-) diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 9ed1180fe31f..23939c0d225f 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -183,6 +183,7 @@ struct spmi_pmic_arb { * struct pmic_arb_ver_ops - version dependent functionality. * * @ver_str: version string. + * @init_apid: finds the apid base and count * @ppid_to_apid: finds the apid for a given ppid. * @non_data_cmd: on v1 issues an spmi non-data command. * on v2 no HW support, returns -EOPNOTSUPP. @@ -202,6 +203,7 @@ struct spmi_pmic_arb { */ struct pmic_arb_ver_ops { const char *ver_str; + int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index); int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid); /* spmi commands (read_cmd, write_cmd, cmd) functionality */ int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, @@ -942,6 +944,38 @@ static int qpnpint_irq_domain_alloc(struct irq_domain = *domain, return 0; } =20 +static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb) +{ + /* + * Initialize max_apid/min_apid to the opposite bounds, during + * the irq domain translation, we are sure to update these + */ + pmic_arb->max_apid =3D 0; + pmic_arb->min_apid =3D pmic_arb->max_periphs - 1; + + return 0; +} + +static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index) +{ + u32 *mapping_table; + + if (index) { + dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n", + index); + return -EINVAL; + } + + mapping_table =3D devm_kcalloc(&pmic_arb->spmic->dev, pmic_arb->max_perip= hs, + sizeof(*mapping_table), GFP_KERNEL); + if (!mapping_table) + return -ENOMEM; + + pmic_arb->mapping_table =3D mapping_table; + + return pmic_arb_init_apid_min_max(pmic_arb); +} + static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 pp= id) { u32 *mapping_table =3D pmic_arb->mapping_table; @@ -1144,6 +1178,40 @@ static int pmic_arb_offset_v2(struct spmi_pmic_arb *= pmic_arb, u8 sid, u16 addr, return 0x1000 * pmic_arb->ee + 0x8000 * apid; } =20 +static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb, int index) +{ + int ret; + + if (index) { + dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n", + index); + return -EINVAL; + } + + pmic_arb->base_apid =3D 0; + pmic_arb->apid_count =3D readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES= ) & + PMIC_ARB_FEATURES_PERIPH_MASK; + + if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) { + dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n", + pmic_arb->base_apid + pmic_arb->apid_count); + return -EINVAL; + } + + ret =3D pmic_arb_init_apid_min_max(pmic_arb); + if (ret) + return ret; + + ret =3D pmic_arb_read_apid_map_v5(pmic_arb); + if (ret) { + dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table,= rc=3D %d\n", + ret); + return ret; + } + + return 0; +} + /* * v5 offset per ee and per apid for observer channels and per apid for * read/write channels. @@ -1178,6 +1246,49 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *= pmic_arb, u8 sid, u16 addr, return offset; } =20 +/* + * Only v7 supports 2 bus buses. Each bus will get a different apid count, + * read from different registers. + */ +static int pmic_arb_init_apid_v7(struct spmi_pmic_arb *pmic_arb, int index) +{ + int ret; + + if (index =3D=3D 0) { + pmic_arb->base_apid =3D 0; + pmic_arb->apid_count =3D readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURE= S) & + PMIC_ARB_FEATURES_PERIPH_MASK; + } else if (index =3D=3D 1) { + pmic_arb->base_apid =3D readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES= ) & + PMIC_ARB_FEATURES_PERIPH_MASK; + pmic_arb->apid_count =3D readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURE= S1) & + PMIC_ARB_FEATURES_PERIPH_MASK; + } else { + dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n", + index); + return -EINVAL; + } + + if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) { + dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n", + pmic_arb->base_apid + pmic_arb->apid_count); + return -EINVAL; + } + + ret =3D pmic_arb_init_apid_min_max(pmic_arb); + if (ret) + return ret; + + ret =3D pmic_arb_read_apid_map_v5(pmic_arb); + if (ret) { + dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table,= rc=3D %d\n", + ret); + return ret; + } + + return 0; +} + /* * v7 offset per ee and per apid for observer channels and per apid for * read/write channels. @@ -1358,6 +1469,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb= , u16 n) =20 static const struct pmic_arb_ver_ops pmic_arb_v1 =3D { .ver_str =3D "v1", + .init_apid =3D pmic_arb_init_apid_v1, .ppid_to_apid =3D pmic_arb_ppid_to_apid_v1, .non_data_cmd =3D pmic_arb_non_data_cmd_v1, .offset =3D pmic_arb_offset_v1, @@ -1372,6 +1484,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 =3D { =20 static const struct pmic_arb_ver_ops pmic_arb_v2 =3D { .ver_str =3D "v2", + .init_apid =3D pmic_arb_init_apid_v1, .ppid_to_apid =3D pmic_arb_ppid_to_apid_v2, .non_data_cmd =3D pmic_arb_non_data_cmd_v2, .offset =3D pmic_arb_offset_v2, @@ -1386,6 +1499,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 =3D { =20 static const struct pmic_arb_ver_ops pmic_arb_v3 =3D { .ver_str =3D "v3", + .init_apid =3D pmic_arb_init_apid_v1, .ppid_to_apid =3D pmic_arb_ppid_to_apid_v2, .non_data_cmd =3D pmic_arb_non_data_cmd_v2, .offset =3D pmic_arb_offset_v2, @@ -1400,6 +1514,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 =3D { =20 static const struct pmic_arb_ver_ops pmic_arb_v5 =3D { .ver_str =3D "v5", + .init_apid =3D pmic_arb_init_apid_v5, .ppid_to_apid =3D pmic_arb_ppid_to_apid_v5, .non_data_cmd =3D pmic_arb_non_data_cmd_v2, .offset =3D pmic_arb_offset_v5, @@ -1414,6 +1529,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 =3D { =20 static const struct pmic_arb_ver_ops pmic_arb_v7 =3D { .ver_str =3D "v7", + .init_apid =3D pmic_arb_init_apid_v7, .ppid_to_apid =3D pmic_arb_ppid_to_apid_v5, .non_data_cmd =3D pmic_arb_non_data_cmd_v2, .offset =3D pmic_arb_offset_v7, @@ -1439,7 +1555,6 @@ static int spmi_pmic_arb_probe(struct platform_device= *pdev) struct spmi_controller *ctrl; struct resource *res; void __iomem *core; - u32 *mapping_table; u32 channel, ee, hw_ver; int err; =20 @@ -1467,12 +1582,6 @@ static int spmi_pmic_arb_probe(struct platform_devic= e *pdev) =20 pmic_arb->core_size =3D resource_size(res); =20 - pmic_arb->ppid_to_apid =3D devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PPID, - sizeof(*pmic_arb->ppid_to_apid), - GFP_KERNEL); - if (!pmic_arb->ppid_to_apid) - return -ENOMEM; - hw_ver =3D readl_relaxed(core + PMIC_ARB_VERSION); =20 if (hw_ver < PMIC_ARB_VERSION_V2_MIN) { @@ -1506,58 +1615,17 @@ static int spmi_pmic_arb_probe(struct platform_devi= ce *pdev) return PTR_ERR(pmic_arb->wr_base); } =20 - pmic_arb->max_periphs =3D PMIC_ARB_MAX_PERIPHS; + dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n", + pmic_arb->ver_ops->ver_str, hw_ver); =20 - if (hw_ver >=3D PMIC_ARB_VERSION_V7_MIN) { + if (hw_ver < PMIC_ARB_VERSION_V7_MIN) + pmic_arb->max_periphs =3D PMIC_ARB_MAX_PERIPHS; + else pmic_arb->max_periphs =3D PMIC_ARB_MAX_PERIPHS_V7; - /* Optional property for v7: */ - of_property_read_u32(pdev->dev.of_node, "qcom,bus-id", - &pmic_arb->bus_instance); - if (pmic_arb->bus_instance > 1) { - dev_err(&pdev->dev, "invalid bus instance (%u) specified\n", - pmic_arb->bus_instance); - return -EINVAL; - } - - if (pmic_arb->bus_instance =3D=3D 0) { - pmic_arb->base_apid =3D 0; - pmic_arb->apid_count =3D - readl_relaxed(core + PMIC_ARB_FEATURES) & - PMIC_ARB_FEATURES_PERIPH_MASK; - } else { - pmic_arb->base_apid =3D - readl_relaxed(core + PMIC_ARB_FEATURES) & - PMIC_ARB_FEATURES_PERIPH_MASK; - pmic_arb->apid_count =3D - readl_relaxed(core + PMIC_ARB_FEATURES1) & - PMIC_ARB_FEATURES_PERIPH_MASK; - } =20 - if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) { - dev_err(&pdev->dev, "Unsupported APID count %d detected\n", - pmic_arb->base_apid + pmic_arb->apid_count); - return -EINVAL; - } - } else if (hw_ver >=3D PMIC_ARB_VERSION_V5_MIN) { - pmic_arb->base_apid =3D 0; - pmic_arb->apid_count =3D readl_relaxed(core + PMIC_ARB_FEATURES) & - PMIC_ARB_FEATURES_PERIPH_MASK; - - if (pmic_arb->apid_count > pmic_arb->max_periphs) { - dev_err(&pdev->dev, "Unsupported APID count %d detected\n", - pmic_arb->apid_count); - return -EINVAL; - } - } - - pmic_arb->apid_data =3D devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs, - sizeof(*pmic_arb->apid_data), - GFP_KERNEL); - if (!pmic_arb->apid_data) - return -ENOMEM; - - dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n", - pmic_arb->ver_ops->ver_str, hw_ver); + err =3D pmic_arb->ver_ops->init_apid(pmic_arb, 0); + if (err) + return err; =20 res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr"); pmic_arb->intr =3D devm_ioremap_resource(&ctrl->dev, res); @@ -1599,16 +1667,6 @@ static int spmi_pmic_arb_probe(struct platform_devic= e *pdev) } =20 pmic_arb->ee =3D ee; - mapping_table =3D devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs, - sizeof(*mapping_table), GFP_KERNEL); - if (!mapping_table) - return -ENOMEM; - - pmic_arb->mapping_table =3D mapping_table; - /* Initialize max_apid/min_apid to the opposite bounds, during - * the irq domain translation, we are sure to update these */ - pmic_arb->max_apid =3D 0; - pmic_arb->min_apid =3D pmic_arb->max_periphs - 1; =20 platform_set_drvdata(pdev, ctrl); raw_spin_lock_init(&pmic_arb->lock); @@ -1617,15 +1675,6 @@ static int spmi_pmic_arb_probe(struct platform_devic= e *pdev) ctrl->read_cmd =3D pmic_arb_read_cmd; ctrl->write_cmd =3D pmic_arb_write_cmd; =20 - if (hw_ver >=3D PMIC_ARB_VERSION_V5_MIN) { - err =3D pmic_arb_read_apid_map_v5(pmic_arb); - if (err) { - dev_err(&pdev->dev, "could not read APID->PPID mapping table, rc=3D %d\= n", - err); - return err; - } - } - dev_dbg(&pdev->dev, "adding irq domain\n"); pmic_arb->domain =3D irq_domain_add_tree(pdev->dev.of_node, &pmic_arb_irq_domain_ops, pmic_arb); --=20 2.34.1