From 556195f492a15f27f2389acf6e99ae8e5a1bf3d9 Mon Sep 17 00:00:00 2001 From: Robert Jarzmik Date: Tue, 18 Oct 2016 08:46:32 +0200 Subject: [PATCH] Revert "dmaengine: pxa_dma: add support for legacy transition" This reverts commit c91134d9194478144ba579ca6efeddf628055650. The conversion of the pxa architecture is now finished for all drivers, so this functions has fullfilled its purpose and can now be removed. Signed-off-by: Robert Jarzmik Acked-by: Arnd Bergmann Signed-off-by: Vinod Koul --- drivers/dma/pxa_dma.c | 28 ---------------------------- 1 file changed, 28 deletions(-) diff --git a/drivers/dma/pxa_dma.c b/drivers/dma/pxa_dma.c index 3f56f9ca4482..b53fb618bbf6 100644 --- a/drivers/dma/pxa_dma.c +++ b/drivers/dma/pxa_dma.c @@ -413,15 +413,6 @@ static inline void pxad_init_debugfs(struct pxad_device *pdev) {} static inline void pxad_cleanup_debugfs(struct pxad_device *pdev) {} #endif -/* - * In the transition phase where legacy pxa handling is done at the same time as - * mmp_dma, the DMA physical channel split between the 2 DMA providers is done - * through legacy_reserved. Legacy code reserves DMA channels by settings - * corresponding bits in legacy_reserved. - */ -static u32 legacy_reserved; -static u32 legacy_unavailable; - static struct pxad_phy *lookup_phy(struct pxad_chan *pchan) { int prio, i; @@ -442,14 +433,10 @@ static struct pxad_phy *lookup_phy(struct pxad_chan *pchan) for (i = 0; i < pdev->nr_chans; i++) { if (prio != (i & 0xf) >> 2) continue; - if ((i < 32) && (legacy_reserved & BIT(i))) - continue; phy = &pdev->phys[i]; if (!phy->vchan) { phy->vchan = pchan; found = phy; - if (i < 32) - legacy_unavailable |= BIT(i); goto out_unlock; } } @@ -469,7 +456,6 @@ static void pxad_free_phy(struct pxad_chan *chan) struct pxad_device *pdev = to_pxad_dev(chan->vc.chan.device); unsigned long flags; u32 reg; - int i; dev_dbg(&chan->vc.chan.dev->device, "%s(): freeing\n", __func__); @@ -483,9 +469,6 @@ static void pxad_free_phy(struct pxad_chan *chan) } spin_lock_irqsave(&pdev->phy_lock, flags); - for (i = 0; i < 32; i++) - if (chan->phy == &pdev->phys[i]) - legacy_unavailable &= ~BIT(i); chan->phy->vchan = NULL; chan->phy = NULL; spin_unlock_irqrestore(&pdev->phy_lock, flags); @@ -739,8 +722,6 @@ static irqreturn_t pxad_int_handler(int irq, void *dev_id) i = __ffs(dint); dint &= (dint - 1); phy = &pdev->phys[i]; - if ((i < 32) && (legacy_reserved & BIT(i))) - continue; if (pxad_chan_handler(irq, phy) == IRQ_HANDLED) ret = IRQ_HANDLED; } @@ -1522,15 +1503,6 @@ bool pxad_filter_fn(struct dma_chan *chan, void *param) } EXPORT_SYMBOL_GPL(pxad_filter_fn); -int pxad_toggle_reserved_channel(int legacy_channel) -{ - if (legacy_unavailable & (BIT(legacy_channel))) - return -EBUSY; - legacy_reserved ^= BIT(legacy_channel); - return 0; -} -EXPORT_SYMBOL_GPL(pxad_toggle_reserved_channel); - module_platform_driver(pxad_driver); MODULE_DESCRIPTION("Marvell PXA Peripheral DMA Driver"); -- 2.39.5