From 948c66df0d5e23dbcb84bee39a11b56c8a0d3e41 Mon Sep 17 00:00:00 2001 From: Sekhar Nori Date: Mon, 16 Nov 2009 17:21:37 +0530 Subject: [PATCH] davinci: cpuidle: move mapping of DDR2 controller registers out of driver When suspend is supported, both cpuidle and suspend code need to work on DDR2 registers. Instead of mapping the DDR2 registers twice, do it once outside of cpuidle driver and let cpuidle driver get the virtual base address of DDR2 registers. Signed-off-by: Sekhar Nori Signed-off-by: Kevin Hilman --- arch/arm/mach-davinci/cpuidle.c | 33 +++----------------- arch/arm/mach-davinci/devices-da8xx.c | 16 +++++++++- arch/arm/mach-davinci/include/mach/cpuidle.h | 1 + arch/arm/mach-davinci/include/mach/da8xx.h | 1 + 4 files changed, 21 insertions(+), 30 deletions(-) diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c index beda3b579688..bd59f31b8a95 100644 --- a/arch/arm/mach-davinci/cpuidle.c +++ b/arch/arm/mach-davinci/cpuidle.c @@ -106,8 +106,6 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev) int ret; struct cpuidle_device *device; struct davinci_cpuidle_config *pdata = pdev->dev.platform_data; - struct resource *ddr2_regs; - resource_size_t len; device = &per_cpu(davinci_cpuidle_device, smp_processor_id()); @@ -116,28 +114,12 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev) return -ENOENT; } - ddr2_regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!ddr2_regs) { - dev_err(&pdev->dev, "cannot get DDR2 controller register base"); - return -ENODEV; - } - - len = resource_size(ddr2_regs); - - ddr2_regs = request_mem_region(ddr2_regs->start, len, ddr2_regs->name); - if (!ddr2_regs) - return -EBUSY; - - ddr2_reg_base = ioremap(ddr2_regs->start, len); - if (!ddr2_reg_base) { - ret = -ENOMEM; - goto ioremap_fail; - } + ddr2_reg_base = pdata->ddr2_ctlr_base; ret = cpuidle_register_driver(&davinci_idle_driver); if (ret) { dev_err(&pdev->dev, "failed to register driver\n"); - goto driver_register_fail; + return ret; } /* Wait for interrupt state */ @@ -164,18 +146,11 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev) ret = cpuidle_register_device(device); if (ret) { dev_err(&pdev->dev, "failed to register device\n"); - goto device_register_fail; + cpuidle_unregister_driver(&davinci_idle_driver); + return ret; } return 0; - -device_register_fail: - cpuidle_unregister_driver(&davinci_idle_driver); -driver_register_fail: - iounmap(ddr2_reg_base); -ioremap_fail: - release_mem_region(ddr2_regs->start, len); - return ret; } static struct platform_driver davinci_cpuidle_driver = { diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c index 745534eb63c7..0c759ad0aeee 100644 --- a/arch/arm/mach-davinci/devices-da8xx.c +++ b/arch/arm/mach-davinci/devices-da8xx.c @@ -496,6 +496,19 @@ int da8xx_register_rtc(void) return ret; } +static void __iomem *da8xx_ddr2_ctlr_base; +void __iomem * __init da8xx_get_mem_ctlr(void) +{ + if (da8xx_ddr2_ctlr_base) + return da8xx_ddr2_ctlr_base; + + da8xx_ddr2_ctlr_base = ioremap(DA8XX_DDR2_CTL_BASE, SZ_32K); + if (!da8xx_ddr2_ctlr_base) + pr_warning("%s: Unable to map DDR2 controller", __func__); + + return da8xx_ddr2_ctlr_base; +} + static struct resource da8xx_cpuidle_resources[] = { { .start = DA8XX_DDR2_CTL_BASE, @@ -521,6 +534,7 @@ static struct platform_device da8xx_cpuidle_device = { int __init da8xx_register_cpuidle(void) { + da8xx_cpuidle_pdata.ddr2_ctlr_base = da8xx_get_mem_ctlr(); + return platform_device_register(&da8xx_cpuidle_device); } - diff --git a/arch/arm/mach-davinci/include/mach/cpuidle.h b/arch/arm/mach-davinci/include/mach/cpuidle.h index cbfc6a9c81b4..74f088b0edfb 100644 --- a/arch/arm/mach-davinci/include/mach/cpuidle.h +++ b/arch/arm/mach-davinci/include/mach/cpuidle.h @@ -12,6 +12,7 @@ struct davinci_cpuidle_config { u32 ddr2_pdown; + void __iomem *ddr2_ctlr_base; }; #endif diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h index bddc4d4a806e..cab4a25ebe4f 100644 --- a/arch/arm/mach-davinci/include/mach/da8xx.h +++ b/arch/arm/mach-davinci/include/mach/da8xx.h @@ -94,6 +94,7 @@ void __init da8xx_register_mcasp(int id, struct snd_platform_data *pdata); int da8xx_register_rtc(void); int da850_register_cpufreq(void); int da8xx_register_cpuidle(void); +void __iomem * __init da8xx_get_mem_ctlr(void); extern struct platform_device da8xx_serial_device; extern struct emac_platform_data da8xx_emac_pdata; -- 2.20.1