[PATCH v4 12/16] mtd: onenand: omap2: Enable DMA by default

Ladislav Michl
2017-11-11T21:24:55Z

DMA and R/B pin are independent on each other. Use DMA by default.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
---
Changes:
-v4: new patch

drivers/mtd/onenand/omap2.c | 41 +++++++++++++++++------------------------
1 file changed, 17 insertions(+), 24 deletions(-)

diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index e4857a41760d..62e4ede918c4 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -152,17 +152,13 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state)
}

reinit_completion(&c->irq_done);
- if (c->gpio_irq) {
- result = gpio_get_value(c->gpio_irq);
- if (result == -1) {
- ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
- intr = read_reg(c, ONENAND_REG_INTERRUPT);
- wait_err("gpio error", state, ctrl, intr);
- return -EIO;
- }
- } else
- result = 0;
- if (result == 0) {
+ result = gpio_get_value(c->gpio_irq);
+ if (result < 0) {
+ ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
+ intr = read_reg(c, ONENAND_REG_INTERRUPT);
+ wait_err("gpio error", state, ctrl, intr);
+ return -EIO;
+ } else if (result == 0) {
int retry_cnt = 0;
retry:
if (!wait_for_completion_io_timeout(&c->irq_done,
@@ -513,13 +509,15 @@ static int omap2_onenand_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Failed to request GPIO%d for "
"OneNAND\n", c->gpio_irq);
goto err_iounmap;
- }
- gpio_direction_input(c->gpio_irq);
+ }
+ gpio_direction_input(c->gpio_irq);
+
+ if ((r = request_irq(gpio_to_irq(c->gpio_irq),
+ omap2_onenand_interrupt, IRQF_TRIGGER_RISING,
+ pdev->dev.driver->name, c)) < 0)
+ goto err_release_gpio;

- if ((r = request_irq(gpio_to_irq(c->gpio_irq),
- omap2_onenand_interrupt, IRQF_TRIGGER_RISING,
- pdev->dev.driver->name, c)) < 0)
- goto err_release_gpio;
+ this->wait = omap2_onenand_wait;
}

if (pdata->dma_channel >= 0) {
@@ -529,15 +527,11 @@ static int omap2_onenand_probe(struct platform_device *pdev)
dma_cap_set(DMA_MEMCPY, mask);

c->dma_chan = dma_request_channel(mask, NULL, NULL);
- if (!c->dma_chan)
- dev_info(&pdev->dev,
- "failed to allocate DMA for OneNAND, "
- "using PIO instead\n");
}

dev_info(&pdev->dev, "initializing on CS%d, phys base 0x%08lx, virtual "
- "base %p, freq %d MHz\n", c->gpmc_cs, c->phys_base,
- c->onenand.base, c->freq);
+ "base %p, freq %d MHz, %s mode\n", c->gpmc_cs, c->phys_base,
+ c->onenand.base, c->freq, c->dma_chan ? "DMA" : "PIO");

c->pdev = pdev;
c->mtd.priv = &c->onenand;
@@ -547,7 +541,6 @@ static int omap2_onenand_probe(struct platform_device *pdev)

this = &c->onenand;
if (c->dma_chan) {
- this->wait = omap2_onenand_wait;
this->read_bufferram = omap2_onenand_read_bufferram;
this->write_bufferram = omap2_onenand_write_bufferram;
}
--
2.11.0