| Message ID | 20240326-spmi-multi-master-support-v6-4-1c87d8306c5b@linaro.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | spmi: pmic-arb: Add support for multiple buses | expand |
On 26/03/2024 17:28, Abel Vesa wrote: > Rather than setting up the core, obsrv and chnls in probe by using > version specific conditionals, add a dedicated "get_core_resources" > version specific op and move the acquiring in there. > > Signed-off-by: Abel Vesa <abel.vesa@linaro.org> > --- > drivers/spmi/spmi-pmic-arb.c | 113 +++++++++++++++++++++++++++---------------- > 1 file changed, 70 insertions(+), 43 deletions(-) > > diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c > index 38fed8a585fe..188252bfb95f 100644 > --- a/drivers/spmi/spmi-pmic-arb.c > +++ b/drivers/spmi/spmi-pmic-arb.c > @@ -203,6 +203,7 @@ struct spmi_pmic_arb { > */ > struct pmic_arb_ver_ops { > const char *ver_str; > + int (*get_core_resources)(struct platform_device *pdev, void __iomem *core); > 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 */ > @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb) > return 0; > } > > +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev, > + void __iomem *core) > +{ > + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); > + > + pmic_arb->wr_base = core; > + pmic_arb->rd_base = core; > + > + pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; > + > + return 0; > +} > + > static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index) > { > u32 *mapping_table; > @@ -1063,6 +1077,33 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid) > return apid; > } > > +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev) > +{ > + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); > + > + pmic_arb->rd_base = devm_platform_ioremap_resource_byname(pdev, "obsrvr"); > + if (IS_ERR(pmic_arb->rd_base)) > + return PTR_ERR(pmic_arb->rd_base); > + > + pmic_arb->wr_base = devm_platform_ioremap_resource_byname(pdev, "chnls"); > + if (IS_ERR(pmic_arb->wr_base)) > + return PTR_ERR(pmic_arb->wr_base); > + > + return 0; > +} > + > +static int pmic_arb_get_core_resources_v2(struct platform_device *pdev, > + void __iomem *core) > +{ > + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); > + > + pmic_arb->core = core; > + > + pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; > + > + return pmic_arb_get_obsrvr_chnls_v2(pdev); > +} > + > static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid) > { > u16 apid_valid; > @@ -1246,6 +1287,18 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, > return offset; > } > > +static int pmic_arb_get_core_resources_v7(struct platform_device *pdev, > + void __iomem *core) > +{ > + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); > + > + pmic_arb->core = core; > + > + pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7; > + > + return pmic_arb_get_obsrvr_chnls_v2(pdev); > +} > + > /* > * Only v7 supports 2 buses. Each bus will get a different apid count, read > * from different registers. > @@ -1469,6 +1522,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n) > > static const struct pmic_arb_ver_ops pmic_arb_v1 = { > .ver_str = "v1", > + .get_core_resources = pmic_arb_get_core_resources_v1, > .init_apid = pmic_arb_init_apid_v1, > .ppid_to_apid = pmic_arb_ppid_to_apid_v1, > .non_data_cmd = pmic_arb_non_data_cmd_v1, > @@ -1484,6 +1538,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = { > > static const struct pmic_arb_ver_ops pmic_arb_v2 = { > .ver_str = "v2", > + .get_core_resources = pmic_arb_get_core_resources_v2, > .init_apid = pmic_arb_init_apid_v1, > .ppid_to_apid = pmic_arb_ppid_to_apid_v2, > .non_data_cmd = pmic_arb_non_data_cmd_v2, > @@ -1499,6 +1554,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = { > > static const struct pmic_arb_ver_ops pmic_arb_v3 = { > .ver_str = "v3", > + .get_core_resources = pmic_arb_get_core_resources_v2, > .init_apid = pmic_arb_init_apid_v1, > .ppid_to_apid = pmic_arb_ppid_to_apid_v2, > .non_data_cmd = pmic_arb_non_data_cmd_v2, > @@ -1514,6 +1570,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = { > > static const struct pmic_arb_ver_ops pmic_arb_v5 = { > .ver_str = "v5", > + .get_core_resources = pmic_arb_get_core_resources_v2, > .init_apid = pmic_arb_init_apid_v5, > .ppid_to_apid = pmic_arb_ppid_to_apid_v5, > .non_data_cmd = pmic_arb_non_data_cmd_v2, > @@ -1529,6 +1586,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = { > > static const struct pmic_arb_ver_ops pmic_arb_v7 = { > .ver_str = "v7", > + .get_core_resources = pmic_arb_get_core_resources_v7, > .init_apid = pmic_arb_init_apid_v7, > .ppid_to_apid = pmic_arb_ppid_to_apid_v5, > .non_data_cmd = pmic_arb_non_data_cmd_v2, > @@ -1565,16 +1623,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) > pmic_arb = spmi_controller_get_drvdata(ctrl); > pmic_arb->spmic = ctrl; > > - /* > - * Please don't replace this with devm_platform_ioremap_resource() or > - * devm_ioremap_resource(). These both result in a call to > - * devm_request_mem_region() which prevents multiple mappings of this > - * register address range. SoCs with PMIC arbiter v7 may define two > - * arbiter devices, for the two physical SPMI interfaces, which share > - * some register address ranges (i.e. "core", "obsrvr", and "chnls"). > - * Ensure that both devices probe successfully by calling devm_ioremap() > - * which does not result in a devm_request_mem_region() call. > - */ Can you explain in the commit message why you remove this comment ? > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core"); > core = devm_ioremap(&ctrl->dev, res->start, resource_size(res)); > if (IS_ERR(core)) > @@ -1584,44 +1632,23 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) > > hw_ver = readl_relaxed(core + PMIC_ARB_VERSION); > > - if (hw_ver < PMIC_ARB_VERSION_V2_MIN) { > + if (hw_ver < PMIC_ARB_VERSION_V2_MIN) > pmic_arb->ver_ops = &pmic_arb_v1; > - pmic_arb->wr_base = core; > - pmic_arb->rd_base = core; > - } else { > - pmic_arb->core = core; > - > - if (hw_ver < PMIC_ARB_VERSION_V3_MIN) > - pmic_arb->ver_ops = &pmic_arb_v2; > - else if (hw_ver < PMIC_ARB_VERSION_V5_MIN) > - pmic_arb->ver_ops = &pmic_arb_v3; > - else if (hw_ver < PMIC_ARB_VERSION_V7_MIN) > - pmic_arb->ver_ops = &pmic_arb_v5; > - else > - pmic_arb->ver_ops = &pmic_arb_v7; > - > - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, > - "obsrvr"); > - pmic_arb->rd_base = devm_ioremap(&ctrl->dev, res->start, > - resource_size(res)); > - if (IS_ERR(pmic_arb->rd_base)) > - return PTR_ERR(pmic_arb->rd_base); > - > - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, > - "chnls"); > - pmic_arb->wr_base = devm_ioremap(&ctrl->dev, res->start, > - resource_size(res)); > - if (IS_ERR(pmic_arb->wr_base)) > - return PTR_ERR(pmic_arb->wr_base); > - } > + else if (hw_ver < PMIC_ARB_VERSION_V3_MIN) > + pmic_arb->ver_ops = &pmic_arb_v2; > + else if (hw_ver < PMIC_ARB_VERSION_V5_MIN) > + pmic_arb->ver_ops = &pmic_arb_v3; > + else if (hw_ver < PMIC_ARB_VERSION_V7_MIN) > + pmic_arb->ver_ops = &pmic_arb_v5; > + else > + pmic_arb->ver_ops = &pmic_arb_v7; > > dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n", > pmic_arb->ver_ops->ver_str, hw_ver); > > - if (hw_ver < PMIC_ARB_VERSION_V7_MIN) > - pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; > - else > - pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7; > + err = pmic_arb->ver_ops->get_core_resources(pdev, core); > + if (err) > + return err; > > err = pmic_arb->ver_ops->init_apid(pmic_arb, 0); > if (err) > With that added: Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 38fed8a585fe..188252bfb95f 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -203,6 +203,7 @@ struct spmi_pmic_arb { */ struct pmic_arb_ver_ops { const char *ver_str; + int (*get_core_resources)(struct platform_device *pdev, void __iomem *core); 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 */ @@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb) return 0; } +static int pmic_arb_get_core_resources_v1(struct platform_device *pdev, + void __iomem *core) +{ + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); + + pmic_arb->wr_base = core; + pmic_arb->rd_base = core; + + pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; + + return 0; +} + static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index) { u32 *mapping_table; @@ -1063,6 +1077,33 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid) return apid; } +static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev) +{ + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); + + pmic_arb->rd_base = devm_platform_ioremap_resource_byname(pdev, "obsrvr"); + if (IS_ERR(pmic_arb->rd_base)) + return PTR_ERR(pmic_arb->rd_base); + + pmic_arb->wr_base = devm_platform_ioremap_resource_byname(pdev, "chnls"); + if (IS_ERR(pmic_arb->wr_base)) + return PTR_ERR(pmic_arb->wr_base); + + return 0; +} + +static int pmic_arb_get_core_resources_v2(struct platform_device *pdev, + void __iomem *core) +{ + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); + + pmic_arb->core = core; + + pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; + + return pmic_arb_get_obsrvr_chnls_v2(pdev); +} + static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid) { u16 apid_valid; @@ -1246,6 +1287,18 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, return offset; } +static int pmic_arb_get_core_resources_v7(struct platform_device *pdev, + void __iomem *core) +{ + struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev); + + pmic_arb->core = core; + + pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7; + + return pmic_arb_get_obsrvr_chnls_v2(pdev); +} + /* * Only v7 supports 2 buses. Each bus will get a different apid count, read * from different registers. @@ -1469,6 +1522,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n) static const struct pmic_arb_ver_ops pmic_arb_v1 = { .ver_str = "v1", + .get_core_resources = pmic_arb_get_core_resources_v1, .init_apid = pmic_arb_init_apid_v1, .ppid_to_apid = pmic_arb_ppid_to_apid_v1, .non_data_cmd = pmic_arb_non_data_cmd_v1, @@ -1484,6 +1538,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = { static const struct pmic_arb_ver_ops pmic_arb_v2 = { .ver_str = "v2", + .get_core_resources = pmic_arb_get_core_resources_v2, .init_apid = pmic_arb_init_apid_v1, .ppid_to_apid = pmic_arb_ppid_to_apid_v2, .non_data_cmd = pmic_arb_non_data_cmd_v2, @@ -1499,6 +1554,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = { static const struct pmic_arb_ver_ops pmic_arb_v3 = { .ver_str = "v3", + .get_core_resources = pmic_arb_get_core_resources_v2, .init_apid = pmic_arb_init_apid_v1, .ppid_to_apid = pmic_arb_ppid_to_apid_v2, .non_data_cmd = pmic_arb_non_data_cmd_v2, @@ -1514,6 +1570,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = { static const struct pmic_arb_ver_ops pmic_arb_v5 = { .ver_str = "v5", + .get_core_resources = pmic_arb_get_core_resources_v2, .init_apid = pmic_arb_init_apid_v5, .ppid_to_apid = pmic_arb_ppid_to_apid_v5, .non_data_cmd = pmic_arb_non_data_cmd_v2, @@ -1529,6 +1586,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = { static const struct pmic_arb_ver_ops pmic_arb_v7 = { .ver_str = "v7", + .get_core_resources = pmic_arb_get_core_resources_v7, .init_apid = pmic_arb_init_apid_v7, .ppid_to_apid = pmic_arb_ppid_to_apid_v5, .non_data_cmd = pmic_arb_non_data_cmd_v2, @@ -1565,16 +1623,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) pmic_arb = spmi_controller_get_drvdata(ctrl); pmic_arb->spmic = ctrl; - /* - * Please don't replace this with devm_platform_ioremap_resource() or - * devm_ioremap_resource(). These both result in a call to - * devm_request_mem_region() which prevents multiple mappings of this - * register address range. SoCs with PMIC arbiter v7 may define two - * arbiter devices, for the two physical SPMI interfaces, which share - * some register address ranges (i.e. "core", "obsrvr", and "chnls"). - * Ensure that both devices probe successfully by calling devm_ioremap() - * which does not result in a devm_request_mem_region() call. - */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core"); core = devm_ioremap(&ctrl->dev, res->start, resource_size(res)); if (IS_ERR(core)) @@ -1584,44 +1632,23 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) hw_ver = readl_relaxed(core + PMIC_ARB_VERSION); - if (hw_ver < PMIC_ARB_VERSION_V2_MIN) { + if (hw_ver < PMIC_ARB_VERSION_V2_MIN) pmic_arb->ver_ops = &pmic_arb_v1; - pmic_arb->wr_base = core; - pmic_arb->rd_base = core; - } else { - pmic_arb->core = core; - - if (hw_ver < PMIC_ARB_VERSION_V3_MIN) - pmic_arb->ver_ops = &pmic_arb_v2; - else if (hw_ver < PMIC_ARB_VERSION_V5_MIN) - pmic_arb->ver_ops = &pmic_arb_v3; - else if (hw_ver < PMIC_ARB_VERSION_V7_MIN) - pmic_arb->ver_ops = &pmic_arb_v5; - else - pmic_arb->ver_ops = &pmic_arb_v7; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, - "obsrvr"); - pmic_arb->rd_base = devm_ioremap(&ctrl->dev, res->start, - resource_size(res)); - if (IS_ERR(pmic_arb->rd_base)) - return PTR_ERR(pmic_arb->rd_base); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, - "chnls"); - pmic_arb->wr_base = devm_ioremap(&ctrl->dev, res->start, - resource_size(res)); - if (IS_ERR(pmic_arb->wr_base)) - return PTR_ERR(pmic_arb->wr_base); - } + else if (hw_ver < PMIC_ARB_VERSION_V3_MIN) + pmic_arb->ver_ops = &pmic_arb_v2; + else if (hw_ver < PMIC_ARB_VERSION_V5_MIN) + pmic_arb->ver_ops = &pmic_arb_v3; + else if (hw_ver < PMIC_ARB_VERSION_V7_MIN) + pmic_arb->ver_ops = &pmic_arb_v5; + else + pmic_arb->ver_ops = &pmic_arb_v7; dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n", pmic_arb->ver_ops->ver_str, hw_ver); - if (hw_ver < PMIC_ARB_VERSION_V7_MIN) - pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; - else - pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7; + err = pmic_arb->ver_ops->get_core_resources(pdev, core); + if (err) + return err; err = pmic_arb->ver_ops->init_apid(pmic_arb, 0); if (err)
Rather than setting up the core, obsrv and chnls in probe by using version specific conditionals, add a dedicated "get_core_resources" version specific op and move the acquiring in there. Signed-off-by: Abel Vesa <abel.vesa@linaro.org> --- drivers/spmi/spmi-pmic-arb.c | 113 +++++++++++++++++++++++++++---------------- 1 file changed, 70 insertions(+), 43 deletions(-)