From 92b97f0aaccbf9de4a29696e6253bf82e8850d1d Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 14 Aug 2011 09:13:48 +0100 Subject: PM: add runtime PM support to core Primecell driver Add runtime PM support to the core Primecell driver, following the PCI model of how this is done. Rather than having every driver fiddle about with enabling runtime PM, that's dealt with in the core and instead, drivers just do a put() in their probe and a balancing get() in their remove function to activate runtime PM for the device. As we're dealing with enabling runtime PM in the core, fix up spi-pl022 as it must not enable and disable runtime PM itself anymore. Tested-by: Linus Walleij Acked-by: Rafael J. Wysocki Signed-off-by: Russell King --- drivers/spi/spi-pl022.c | 80 +++++++++++++++++++++++++++++-------------------- 1 file changed, 48 insertions(+), 32 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index 730b4a37b823..078338f59481 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -515,9 +515,6 @@ static void giveback(struct pl022 *pl022) if (msg->complete) msg->complete(msg->context); /* This message is completed, so let's turn off the clocks & power */ - clk_disable(pl022->clk); - amba_pclk_disable(pl022->adev); - amba_vcore_disable(pl022->adev); pm_runtime_put(&pl022->adev->dev); } @@ -1545,9 +1542,6 @@ static void pump_messages(struct work_struct *work) * (poll/interrupt/DMA) */ pm_runtime_get_sync(&pl022->adev->dev); - amba_vcore_enable(pl022->adev); - amba_pclk_enable(pl022->adev); - clk_enable(pl022->clk); restore_state(pl022); flush(pl022); @@ -2186,8 +2180,6 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) } printk(KERN_INFO "pl022: mapped registers from 0x%08x to %p\n", adev->res.start, pl022->virtbase); - pm_runtime_enable(dev); - pm_runtime_resume(dev); pl022->clk = clk_get(&adev->dev, NULL); if (IS_ERR(pl022->clk)) { @@ -2195,7 +2187,6 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) dev_err(&adev->dev, "could not retrieve SSP/SPI bus clock\n"); goto err_no_clk; } - /* Disable SSP */ writew((readw(SSP_CR1(pl022->virtbase)) & (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); @@ -2235,12 +2226,9 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) goto err_spi_register; } dev_dbg(dev, "probe succeeded\n"); - /* - * Disable the silicon block pclk and any voltage domain and just - * power it up and clock it when it's needed - */ - amba_pclk_disable(adev); - amba_vcore_disable(adev); + + /* let runtime pm put suspend */ + pm_runtime_put(dev); return 0; err_spi_register: @@ -2249,7 +2237,6 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) destroy_queue(pl022); pl022_dma_remove(pl022); free_irq(adev->irq[0], pl022); - pm_runtime_disable(&adev->dev); err_no_irq: clk_put(pl022->clk); err_no_clk: @@ -2271,6 +2258,12 @@ pl022_remove(struct amba_device *adev) if (!pl022) return 0; + /* + * undo pm_runtime_put() in probe. I assume that we're not + * accessing the primecell here. + */ + pm_runtime_get_noresume(&adev->dev); + /* Remove the queue */ if (destroy_queue(pl022) != 0) dev_err(&adev->dev, "queue remove failed\n"); @@ -2288,10 +2281,10 @@ pl022_remove(struct amba_device *adev) return 0; } -#ifdef CONFIG_PM -static int pl022_suspend(struct amba_device *adev, pm_message_t state) +#ifdef CONFIG_SUSPEND +static int pl011_suspend(struct device *dev) { - struct pl022 *pl022 = amba_get_drvdata(adev); + struct pl022 *pl022 = dev_get_drvdata(dev); int status = 0; status = stop_queue(pl022); @@ -2300,34 +2293,58 @@ static int pl022_suspend(struct amba_device *adev, pm_message_t state) return status; } - amba_vcore_enable(adev); - amba_pclk_enable(adev); + amba_vcore_enable(pl022->adev); + amba_pclk_enable(pl022->adev); load_ssp_default_config(pl022); - amba_pclk_disable(adev); - amba_vcore_disable(adev); + amba_pclk_disable(pl022->adev); + amba_vcore_disable(pl022->adev); dev_dbg(&adev->dev, "suspended\n"); return 0; } -static int pl022_resume(struct amba_device *adev) +static int pl022_resume(struct device *dev) { - struct pl022 *pl022 = amba_get_drvdata(adev); + struct pl022 *pl022 = dev_get_drvdata(dev); int status = 0; /* Start the queue running */ status = start_queue(pl022); if (status) - dev_err(&adev->dev, "problem starting queue (%d)\n", status); + dev_err(dev, "problem starting queue (%d)\n", status); else - dev_dbg(&adev->dev, "resumed\n"); + dev_dbg(dev, "resumed\n"); return status; } -#else -#define pl022_suspend NULL -#define pl022_resume NULL #endif /* CONFIG_PM */ +#ifdef CONFIG_PM_RUNTIME +static int pl022_runtime_suspend(struct device *dev) +{ + struct pl022 *pl022 = dev_get_drvdata(dev); + + clk_disable(pl022->clk); + amba_vcore_disable(pl022->adev); + + return 0; +} + +static int pl022_runtime_resume(struct device *dev) +{ + struct pl022 *pl022 = dev_get_drvdata(dev); + + amba_vcore_enable(pl022->adev); + clk_enable(pl022->clk); + + return 0; +} +#endif + +static const struct dev_pm_ops pl022_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pl022_suspend, pl022_resume) + SET_RUNTIME_PM_OPS(pl022_runtime_suspend, pl022_runtime_resume, NULL) +}; + static struct vendor_data vendor_arm = { .fifodepth = 8, .max_bpw = 16, @@ -2407,12 +2424,11 @@ static struct amba_id pl022_ids[] = { static struct amba_driver pl022_driver = { .drv = { .name = "ssp-pl022", + .pm = &pl022_dev_pm_ops, }, .id_table = pl022_ids, .probe = pl022_probe, .remove = __devexit_p(pl022_remove), - .suspend = pl022_suspend, - .resume = pl022_resume, }; -- cgit v1.2.3 From 6cfa6279edbffa921b7d8c9519bfd83a24ba508e Mon Sep 17 00:00:00 2001 From: Peter Hüwe Date: Mon, 5 Sep 2011 21:07:23 +0100 Subject: ARM: 7079/1: spi: Fix builderror in spi-pl022.c This patch fixes a build error, introduced by commit (67fc8b9f, "PM: add runtime PM support to core Primecell driver") which unfortunately was a little bit incomplete and did contain a typo (11 instead of 22). I'm not sure how this patch could have been tested back then, if it doesn't even compile ;) The build failure was: drivers/spi/spi-pl022.c:2292: error: 'adev' undeclared (first use in this function) drivers/spi/spi-pl022.c:2344: error: 'pl022_suspend' undeclared here (not in a function) The build failure appears e.g. for the u8500 and realview defconfig. Signed-off-by: Peter Huewe Signed-off-by: Russell King --- drivers/spi/spi-pl022.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index 078338f59481..3520cf955b95 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -2282,14 +2282,14 @@ pl022_remove(struct amba_device *adev) } #ifdef CONFIG_SUSPEND -static int pl011_suspend(struct device *dev) +static int pl022_suspend(struct device *dev) { struct pl022 *pl022 = dev_get_drvdata(dev); int status = 0; status = stop_queue(pl022); if (status) { - dev_warn(&adev->dev, "suspend cannot stop queue\n"); + dev_warn(dev, "suspend cannot stop queue\n"); return status; } @@ -2298,7 +2298,7 @@ static int pl011_suspend(struct device *dev) load_ssp_default_config(pl022); amba_pclk_disable(pl022->adev); amba_vcore_disable(pl022->adev); - dev_dbg(&adev->dev, "suspended\n"); + dev_dbg(dev, "suspended\n"); return 0; } -- cgit v1.2.3