| Message ID | 003d01ce89f3$44ec2cf0$cec486d0$@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
Hi, On Friday 26 of July 2013 20:28:36 Cho KyongHo wrote: > This commit adds device tree support for System MMU. > This also include the following changes and enhancements: > > * use managed device helper functions. > Simplyfies System MMU device driver. > > * use only a single clock descriptor. > System MMU device descriptor is seperate if it is imposible to make > a single clock descriptor to make a device descriptor for a group of > System MMUs. > > * removed dbgname member from sysmmu_drvdata structure. > debugging kernel message for a System MMU is distinguisheable with the > name of device descroptors. > > Signed-off-by: Cho KyongHo <pullip.cho@samsung.com> > --- > drivers/iommu/Kconfig | 5 +- > drivers/iommu/exynos-iommu.c | 182 > ++++++++++++++++-------------------------- 2 files changed, 70 > insertions(+), 117 deletions(-) Whenever you introduce or modify (extend) a device tree binding please don't forget about reflecting that in documentation (Documentation/devicetree/bindings) and CCing devicetree mailing list (devicetree@vger.kernel.org). Both of these steps are necessary to get any device tree stuff merged. Best regards, Tomasz -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
> -----Original Message----- > From: Tomasz Figa [mailto:tomasz.figa@gmail.com] > Sent: Saturday, July 27, 2013 11:07 PM > > Hi, > > On Friday 26 of July 2013 20:28:36 Cho KyongHo wrote: > > This commit adds device tree support for System MMU. > > This also include the following changes and enhancements: > > > > * use managed device helper functions. > > Simplyfies System MMU device driver. > > > > * use only a single clock descriptor. > > System MMU device descriptor is seperate if it is imposible to make > > a single clock descriptor to make a device descriptor for a group of > > System MMUs. > > > > * removed dbgname member from sysmmu_drvdata structure. > > debugging kernel message for a System MMU is distinguisheable with the > > name of device descroptors. > > > > Signed-off-by: Cho KyongHo <pullip.cho@samsung.com> > > --- > > drivers/iommu/Kconfig | 5 +- > > drivers/iommu/exynos-iommu.c | 182 > > ++++++++++++++++-------------------------- 2 files changed, 70 > > insertions(+), 117 deletions(-) > > Whenever you introduce or modify (extend) a device tree binding please > don't forget about reflecting that in documentation > (Documentation/devicetree/bindings) and CCing devicetree mailing list > (devicetree@vger.kernel.org). Both of these steps are necessary to get any > device tree stuff merged. > Oh I see. Thank you for advice. > Best regards, > Tomasz -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On Friday, July 26, 2013 08:28:36 PM Cho KyongHo wrote: > This commit adds device tree support for System MMU. > This also include the following changes and enhancements: > > * use managed device helper functions. > Simplyfies System MMU device driver. > > * use only a single clock descriptor. > System MMU device descriptor is seperate if it is imposible to make > a single clock descriptor to make a device descriptor for a group of > System MMUs. > > * removed dbgname member from sysmmu_drvdata structure. > debugging kernel message for a System MMU is distinguisheable with the > name of device descroptors. It would make review easier and speed up merge process if this patch would be split on separate ones (each containing one logical change). > Signed-off-by: Cho KyongHo <pullip.cho@samsung.com> > --- > drivers/iommu/Kconfig | 5 +- > drivers/iommu/exynos-iommu.c | 182 ++++++++++++++++-------------------------- > 2 files changed, 70 insertions(+), 117 deletions(-) > > diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig > index c332fb9..d45f3c9 100644 > --- a/drivers/iommu/Kconfig > +++ b/drivers/iommu/Kconfig > @@ -168,16 +168,15 @@ config TEGRA_IOMMU_SMMU > > config EXYNOS_IOMMU > bool "Exynos IOMMU Support" > - depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU > + depends on ARCH_EXYNOS > select IOMMU_API > + default n default n is superfluous > help > Support for the IOMMU(System MMU) of Samsung Exynos application > processor family. This enables H/W multimedia accellerators to see > non-linear physical memory chunks as a linear memory in their > address spaces > > - If unsure, say N here. > - Removal of these 2 lines doesn't seem to be an improvement IMHO. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics > config EXYNOS_IOMMU_DEBUG > bool "Debugging log for Exynos IOMMU" > depends on EXYNOS_IOMMU > diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c > index 093eea5..cfc02ed 100644 > --- a/drivers/iommu/exynos-iommu.c > +++ b/drivers/iommu/exynos-iommu.c > @@ -26,6 +26,7 @@ > #include <linux/list.h> > #include <linux/memblock.h> > #include <linux/export.h> > +#include <linux/of.h> > > #include <asm/cacheflush.h> > #include <asm/pgtable.h> > @@ -170,15 +171,14 @@ struct sysmmu_drvdata { > struct list_head node; /* entry of exynos_iommu_domain.clients */ > struct device *sysmmu; /* System MMU's device descriptor */ > struct device *dev; /* Owner of system MMU */ > - char *dbgname; > int nsfrs; > - void __iomem **sfrbases; > - struct clk *clk[2]; > + struct clk *clk; > int activations; > rwlock_t lock; > struct iommu_domain *domain; > sysmmu_fault_handler_t fault_handler; > unsigned long pgtable; > + void __iomem *sfrbases[0]; > }; > > static bool set_sysmmu_active(struct sysmmu_drvdata *data) > @@ -385,8 +385,8 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) > if (!ret && (itype != SYSMMU_FAULT_UNKNOWN)) > __raw_writel(1 << itype, data->sfrbases[i] + REG_INT_CLEAR); > else > - dev_dbg(data->sysmmu, "(%s) %s is not handled.\n", > - data->dbgname, sysmmu_fault_name[itype]); > + dev_dbg(data->sysmmu, "%s is not handled.\n", > + sysmmu_fault_name[itype]); > > if (itype != SYSMMU_FAULT_UNKNOWN) > sysmmu_unblock(data->sfrbases[i]); > @@ -410,10 +410,8 @@ static bool __exynos_sysmmu_disable(struct sysmmu_drvdata *data) > for (i = 0; i < data->nsfrs; i++) > __raw_writel(CTRL_DISABLE, data->sfrbases[i] + REG_MMU_CTRL); > > - if (data->clk[1]) > - clk_disable(data->clk[1]); > - if (data->clk[0]) > - clk_disable(data->clk[0]); > + if (data->clk) > + clk_disable(data->clk); > > disabled = true; > data->pgtable = 0; > @@ -422,10 +420,10 @@ finish: > write_unlock_irqrestore(&data->lock, flags); > > if (disabled) > - dev_dbg(data->sysmmu, "(%s) Disabled\n", data->dbgname); > + dev_dbg(data->sysmmu, "Disabled\n"); > else > - dev_dbg(data->sysmmu, "(%s) %d times left to be disabled\n", > - data->dbgname, data->activations); > + dev_dbg(data->sysmmu, "%d times left to be disabled\n", > + data->activations); > > return disabled; > } > @@ -452,14 +450,12 @@ static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data, > ret = 1; > } > > - dev_dbg(data->sysmmu, "(%s) Already enabled\n", data->dbgname); > + dev_dbg(data->sysmmu, "Already enabled\n"); > goto finish; > } > > - if (data->clk[0]) > - clk_enable(data->clk[0]); > - if (data->clk[1]) > - clk_enable(data->clk[1]); > + if (data->clk) > + clk_enable(data->clk); > > data->pgtable = pgtable; > > @@ -479,7 +475,7 @@ static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data, > > data->domain = domain; > > - dev_dbg(data->sysmmu, "(%s) Enabled\n", data->dbgname); > + dev_dbg(data->sysmmu, "Enabled\n"); > finish: > write_unlock_irqrestore(&data->lock, flags); > > @@ -495,7 +491,7 @@ int exynos_sysmmu_enable(struct device *dev, unsigned long pgtable) > > ret = pm_runtime_get_sync(data->sysmmu); > if (ret < 0) { > - dev_dbg(data->sysmmu, "(%s) Failed to enable\n", data->dbgname); > + dev_dbg(data->sysmmu, "Failed to enable\n"); > return ret; > } > > @@ -503,8 +499,8 @@ int exynos_sysmmu_enable(struct device *dev, unsigned long pgtable) > if (WARN_ON(ret < 0)) { > pm_runtime_put(data->sysmmu); > dev_err(data->sysmmu, > - "(%s) Already enabled with page table %#lx\n", > - data->dbgname, data->pgtable); > + "Already enabled with page table %#lx\n", > + data->pgtable); > } else { > data->dev = dev; > } > @@ -540,9 +536,7 @@ static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova) > } > } > } else { > - dev_dbg(data->sysmmu, > - "(%s) Disabled. Skipping invalidating TLB.\n", > - data->dbgname); > + dev_dbg(data->sysmmu, "Disabled. Skipping invalidating TLB.\n"); > } > > read_unlock_irqrestore(&data->lock, flags); > @@ -564,141 +558,101 @@ void exynos_sysmmu_tlb_invalidate(struct device *dev) > } > } > } else { > - dev_dbg(data->sysmmu, > - "(%s) Disabled. Skipping invalidating TLB.\n", > - data->dbgname); > + dev_dbg(data->sysmmu, "Disabled. Skipping invalidating TLB.\n"); > } > > read_unlock_irqrestore(&data->lock, flags); > } > > -static int exynos_sysmmu_probe(struct platform_device *pdev) > +static int __init exynos_sysmmu_probe(struct platform_device *pdev) > { > int i, ret; > - struct device *dev; > + struct device *dev = &pdev->dev; > struct sysmmu_drvdata *data; > > - dev = &pdev->dev; > - > - data = kzalloc(sizeof(*data), GFP_KERNEL); > - if (!data) { > - dev_dbg(dev, "Not enough memory\n"); > - ret = -ENOMEM; > - goto err_alloc; > + if (pdev->num_resources == 0) { > + dev_err(dev, "No System MMU resource defined\n"); > + return -ENODEV; > } > > - ret = dev_set_drvdata(dev, data); > - if (ret) { > - dev_dbg(dev, "Unabled to initialize driver data\n"); > - goto err_init; > + data = devm_kzalloc(dev, > + sizeof(*data) + > + sizeof(*data->sfrbases) * (pdev->num_resources / 2), > + GFP_KERNEL); > + if (!data) { > + dev_err(dev, "Not enough memory for initialization\n"); > + return -ENOMEM; > } > > data->nsfrs = pdev->num_resources / 2; > - data->sfrbases = kmalloc(sizeof(*data->sfrbases) * data->nsfrs, > - GFP_KERNEL); > - if (data->sfrbases == NULL) { > - dev_dbg(dev, "Not enough memory\n"); > - ret = -ENOMEM; > - goto err_init; > - } > > for (i = 0; i < data->nsfrs; i++) { > struct resource *res; > + > res = platform_get_resource(pdev, IORESOURCE_MEM, i); > if (!res) { > - dev_dbg(dev, "Unable to find IOMEM region\n"); > - ret = -ENOENT; > - goto err_res; > + dev_err(dev, "Unable to find IOMEM region\n"); > + return -ENOENT; > } > > - data->sfrbases[i] = ioremap(res->start, resource_size(res)); > + data->sfrbases[i] = devm_request_and_ioremap(dev, res); > if (!data->sfrbases[i]) { > - dev_dbg(dev, "Unable to map IOMEM @ PA:%#x\n", > - res->start); > - ret = -ENOENT; > - goto err_res; > + dev_err(dev, "Unable to map IOMEM @ %#x\n", res->start); > + return -EBUSY; > } > } > > for (i = 0; i < data->nsfrs; i++) { > - ret = platform_get_irq(pdev, i); > - if (ret <= 0) { > - dev_dbg(dev, "Unable to find IRQ resource\n"); > - goto err_irq; > + int irq; > + > + irq = platform_get_irq(pdev, i); > + if (irq <= 0) { > + dev_err(dev, "Unable to find IRQ resource\n"); > + return -ENOENT; > } > > - ret = request_irq(ret, exynos_sysmmu_irq, 0, > - dev_name(dev), data); > + ret = devm_request_irq(dev, irq, exynos_sysmmu_irq, > + 0, dev_name(dev), data); > if (ret) { > - dev_dbg(dev, "Unabled to register interrupt handler\n"); > - goto err_irq; > + dev_err(dev, "Unable to register handler to irq %d\n", > + irq); > + return ret; > } > } > > - if (dev_get_platdata(dev)) { > - char *deli, *beg; > - struct sysmmu_platform_data *platdata = dev_get_platdata(dev); > - > - beg = platdata->clockname; > - > - for (deli = beg; (*deli != '\0') && (*deli != ','); deli++) > - /* NOTHING */; > - > - if (*deli == '\0') > - deli = NULL; > - else > - *deli = '\0'; > - > - data->clk[0] = clk_get(dev, beg); > - if (IS_ERR(data->clk[0])) { > - data->clk[0] = NULL; > - dev_dbg(dev, "No clock descriptor registered\n"); > - } > + pm_runtime_enable(dev); > > - if (data->clk[0] && deli) { > - *deli = ','; > - data->clk[1] = clk_get(dev, deli + 1); > - if (IS_ERR(data->clk[1])) > - data->clk[1] = NULL; > - } > + __set_fault_handler(data, &default_fault_handler); > > - data->dbgname = platdata->dbgname; > + data->sysmmu = dev; > + data->clk = devm_clk_get(dev, "sysmmu"); > + if (IS_ERR(data->clk)) { > + dev_info(dev, "No gate clock found!\n"); > + data->clk = NULL; > } > > - data->sysmmu = dev; > rwlock_init(&data->lock); > INIT_LIST_HEAD(&data->node); > > - __set_fault_handler(data, &default_fault_handler); > - > - if (dev->parent) > - pm_runtime_enable(dev); > + platform_set_drvdata(pdev, data); > + dev_dbg(dev, "Probed and initialized\n"); > > - dev_dbg(dev, "(%s) Initialized\n", data->dbgname); > - return 0; > -err_irq: > - while (i-- > 0) { > - int irq; > - > - irq = platform_get_irq(pdev, i); > - free_irq(irq, data); > - } > -err_res: > - while (data->nsfrs-- > 0) > - iounmap(data->sfrbases[data->nsfrs]); > - kfree(data->sfrbases); > -err_init: > - kfree(data); > -err_alloc: > - dev_err(dev, "Failed to initialize\n"); > return ret; > } > > -static struct platform_driver exynos_sysmmu_driver = { > - .probe = exynos_sysmmu_probe, > - .driver = { > +#ifdef CONFIG_OF > +static struct of_device_id sysmmu_of_match[] __initconst = { > + { .compatible = "samsung,exynos4210-sysmmu", }, > + { }, > +}; > +#endif > + > +static struct platform_driver exynos_sysmmu_driver __refdata = { > + .probe = exynos_sysmmu_probe, > + .driver = { > .owner = THIS_MODULE, > .name = "exynos-sysmmu", > + .of_match_table = of_match_ptr(sysmmu_of_match), > } > }; -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index c332fb9..d45f3c9 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -168,16 +168,15 @@ config TEGRA_IOMMU_SMMU config EXYNOS_IOMMU bool "Exynos IOMMU Support" - depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU + depends on ARCH_EXYNOS select IOMMU_API + default n help Support for the IOMMU(System MMU) of Samsung Exynos application processor family. This enables H/W multimedia accellerators to see non-linear physical memory chunks as a linear memory in their address spaces - If unsure, say N here. - config EXYNOS_IOMMU_DEBUG bool "Debugging log for Exynos IOMMU" depends on EXYNOS_IOMMU diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 093eea5..cfc02ed 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -26,6 +26,7 @@ #include <linux/list.h> #include <linux/memblock.h> #include <linux/export.h> +#include <linux/of.h> #include <asm/cacheflush.h> #include <asm/pgtable.h> @@ -170,15 +171,14 @@ struct sysmmu_drvdata { struct list_head node; /* entry of exynos_iommu_domain.clients */ struct device *sysmmu; /* System MMU's device descriptor */ struct device *dev; /* Owner of system MMU */ - char *dbgname; int nsfrs; - void __iomem **sfrbases; - struct clk *clk[2]; + struct clk *clk; int activations; rwlock_t lock; struct iommu_domain *domain; sysmmu_fault_handler_t fault_handler; unsigned long pgtable; + void __iomem *sfrbases[0]; }; static bool set_sysmmu_active(struct sysmmu_drvdata *data) @@ -385,8 +385,8 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) if (!ret && (itype != SYSMMU_FAULT_UNKNOWN)) __raw_writel(1 << itype, data->sfrbases[i] + REG_INT_CLEAR); else - dev_dbg(data->sysmmu, "(%s) %s is not handled.\n", - data->dbgname, sysmmu_fault_name[itype]); + dev_dbg(data->sysmmu, "%s is not handled.\n", + sysmmu_fault_name[itype]); if (itype != SYSMMU_FAULT_UNKNOWN) sysmmu_unblock(data->sfrbases[i]); @@ -410,10 +410,8 @@ static bool __exynos_sysmmu_disable(struct sysmmu_drvdata *data) for (i = 0; i < data->nsfrs; i++) __raw_writel(CTRL_DISABLE, data->sfrbases[i] + REG_MMU_CTRL); - if (data->clk[1]) - clk_disable(data->clk[1]); - if (data->clk[0]) - clk_disable(data->clk[0]); + if (data->clk) + clk_disable(data->clk); disabled = true; data->pgtable = 0; @@ -422,10 +420,10 @@ finish: write_unlock_irqrestore(&data->lock, flags); if (disabled) - dev_dbg(data->sysmmu, "(%s) Disabled\n", data->dbgname); + dev_dbg(data->sysmmu, "Disabled\n"); else - dev_dbg(data->sysmmu, "(%s) %d times left to be disabled\n", - data->dbgname, data->activations); + dev_dbg(data->sysmmu, "%d times left to be disabled\n", + data->activations); return disabled; } @@ -452,14 +450,12 @@ static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data, ret = 1; } - dev_dbg(data->sysmmu, "(%s) Already enabled\n", data->dbgname); + dev_dbg(data->sysmmu, "Already enabled\n"); goto finish; } - if (data->clk[0]) - clk_enable(data->clk[0]); - if (data->clk[1]) - clk_enable(data->clk[1]); + if (data->clk) + clk_enable(data->clk); data->pgtable = pgtable; @@ -479,7 +475,7 @@ static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data, data->domain = domain; - dev_dbg(data->sysmmu, "(%s) Enabled\n", data->dbgname); + dev_dbg(data->sysmmu, "Enabled\n"); finish: write_unlock_irqrestore(&data->lock, flags); @@ -495,7 +491,7 @@ int exynos_sysmmu_enable(struct device *dev, unsigned long pgtable) ret = pm_runtime_get_sync(data->sysmmu); if (ret < 0) { - dev_dbg(data->sysmmu, "(%s) Failed to enable\n", data->dbgname); + dev_dbg(data->sysmmu, "Failed to enable\n"); return ret; } @@ -503,8 +499,8 @@ int exynos_sysmmu_enable(struct device *dev, unsigned long pgtable) if (WARN_ON(ret < 0)) { pm_runtime_put(data->sysmmu); dev_err(data->sysmmu, - "(%s) Already enabled with page table %#lx\n", - data->dbgname, data->pgtable); + "Already enabled with page table %#lx\n", + data->pgtable); } else { data->dev = dev; } @@ -540,9 +536,7 @@ static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova) } } } else { - dev_dbg(data->sysmmu, - "(%s) Disabled. Skipping invalidating TLB.\n", - data->dbgname); + dev_dbg(data->sysmmu, "Disabled. Skipping invalidating TLB.\n"); } read_unlock_irqrestore(&data->lock, flags); @@ -564,141 +558,101 @@ void exynos_sysmmu_tlb_invalidate(struct device *dev) } } } else { - dev_dbg(data->sysmmu, - "(%s) Disabled. Skipping invalidating TLB.\n", - data->dbgname); + dev_dbg(data->sysmmu, "Disabled. Skipping invalidating TLB.\n"); } read_unlock_irqrestore(&data->lock, flags); } -static int exynos_sysmmu_probe(struct platform_device *pdev) +static int __init exynos_sysmmu_probe(struct platform_device *pdev) { int i, ret; - struct device *dev; + struct device *dev = &pdev->dev; struct sysmmu_drvdata *data; - dev = &pdev->dev; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) { - dev_dbg(dev, "Not enough memory\n"); - ret = -ENOMEM; - goto err_alloc; + if (pdev->num_resources == 0) { + dev_err(dev, "No System MMU resource defined\n"); + return -ENODEV; } - ret = dev_set_drvdata(dev, data); - if (ret) { - dev_dbg(dev, "Unabled to initialize driver data\n"); - goto err_init; + data = devm_kzalloc(dev, + sizeof(*data) + + sizeof(*data->sfrbases) * (pdev->num_resources / 2), + GFP_KERNEL); + if (!data) { + dev_err(dev, "Not enough memory for initialization\n"); + return -ENOMEM; } data->nsfrs = pdev->num_resources / 2; - data->sfrbases = kmalloc(sizeof(*data->sfrbases) * data->nsfrs, - GFP_KERNEL); - if (data->sfrbases == NULL) { - dev_dbg(dev, "Not enough memory\n"); - ret = -ENOMEM; - goto err_init; - } for (i = 0; i < data->nsfrs; i++) { struct resource *res; + res = platform_get_resource(pdev, IORESOURCE_MEM, i); if (!res) { - dev_dbg(dev, "Unable to find IOMEM region\n"); - ret = -ENOENT; - goto err_res; + dev_err(dev, "Unable to find IOMEM region\n"); + return -ENOENT; } - data->sfrbases[i] = ioremap(res->start, resource_size(res)); + data->sfrbases[i] = devm_request_and_ioremap(dev, res); if (!data->sfrbases[i]) { - dev_dbg(dev, "Unable to map IOMEM @ PA:%#x\n", - res->start); - ret = -ENOENT; - goto err_res; + dev_err(dev, "Unable to map IOMEM @ %#x\n", res->start); + return -EBUSY; } } for (i = 0; i < data->nsfrs; i++) { - ret = platform_get_irq(pdev, i); - if (ret <= 0) { - dev_dbg(dev, "Unable to find IRQ resource\n"); - goto err_irq; + int irq; + + irq = platform_get_irq(pdev, i); + if (irq <= 0) { + dev_err(dev, "Unable to find IRQ resource\n"); + return -ENOENT; } - ret = request_irq(ret, exynos_sysmmu_irq, 0, - dev_name(dev), data); + ret = devm_request_irq(dev, irq, exynos_sysmmu_irq, + 0, dev_name(dev), data); if (ret) { - dev_dbg(dev, "Unabled to register interrupt handler\n"); - goto err_irq; + dev_err(dev, "Unable to register handler to irq %d\n", + irq); + return ret; } } - if (dev_get_platdata(dev)) { - char *deli, *beg; - struct sysmmu_platform_data *platdata = dev_get_platdata(dev); - - beg = platdata->clockname; - - for (deli = beg; (*deli != '\0') && (*deli != ','); deli++) - /* NOTHING */; - - if (*deli == '\0') - deli = NULL; - else - *deli = '\0'; - - data->clk[0] = clk_get(dev, beg); - if (IS_ERR(data->clk[0])) { - data->clk[0] = NULL; - dev_dbg(dev, "No clock descriptor registered\n"); - } + pm_runtime_enable(dev); - if (data->clk[0] && deli) { - *deli = ','; - data->clk[1] = clk_get(dev, deli + 1); - if (IS_ERR(data->clk[1])) - data->clk[1] = NULL; - } + __set_fault_handler(data, &default_fault_handler); - data->dbgname = platdata->dbgname; + data->sysmmu = dev; + data->clk = devm_clk_get(dev, "sysmmu"); + if (IS_ERR(data->clk)) { + dev_info(dev, "No gate clock found!\n"); + data->clk = NULL; } - data->sysmmu = dev; rwlock_init(&data->lock); INIT_LIST_HEAD(&data->node); - __set_fault_handler(data, &default_fault_handler); - - if (dev->parent) - pm_runtime_enable(dev); + platform_set_drvdata(pdev, data); + dev_dbg(dev, "Probed and initialized\n"); - dev_dbg(dev, "(%s) Initialized\n", data->dbgname); - return 0; -err_irq: - while (i-- > 0) { - int irq; - - irq = platform_get_irq(pdev, i); - free_irq(irq, data); - } -err_res: - while (data->nsfrs-- > 0) - iounmap(data->sfrbases[data->nsfrs]); - kfree(data->sfrbases); -err_init: - kfree(data); -err_alloc: - dev_err(dev, "Failed to initialize\n"); return ret; } -static struct platform_driver exynos_sysmmu_driver = { - .probe = exynos_sysmmu_probe, - .driver = { +#ifdef CONFIG_OF +static struct of_device_id sysmmu_of_match[] __initconst = { + { .compatible = "samsung,exynos4210-sysmmu", }, + { }, +}; +#endif + +static struct platform_driver exynos_sysmmu_driver __refdata = { + .probe = exynos_sysmmu_probe, + .driver = { .owner = THIS_MODULE, .name = "exynos-sysmmu", + .of_match_table = of_match_ptr(sysmmu_of_match), } };
This commit adds device tree support for System MMU. This also include the following changes and enhancements: * use managed device helper functions. Simplyfies System MMU device driver. * use only a single clock descriptor. System MMU device descriptor is seperate if it is imposible to make a single clock descriptor to make a device descriptor for a group of System MMUs. * removed dbgname member from sysmmu_drvdata structure. debugging kernel message for a System MMU is distinguisheable with the name of device descroptors. Signed-off-by: Cho KyongHo <pullip.cho@samsung.com> --- drivers/iommu/Kconfig | 5 +- drivers/iommu/exynos-iommu.c | 182 ++++++++++++++++-------------------------- 2 files changed, 70 insertions(+), 117 deletions(-)