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mtd: rawnand: fsmc: Disable NAND on remove()

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This disables the NAND on remove() and the errorpath,
making sure the chipselect gets deasserted when the
NAND is not in use.

Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Linus Walleij 2019-01-26 14:10:56 +01:00 committed by Miquel Raynal
parent 30c72ab142
commit ab3ab7b654
1 changed files with 15 additions and 0 deletions
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15
drivers/mtd/nand/raw/fsmc_nand.c
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@ -986,6 +986,19 @@ static const struct nand_controller_ops fsmc_nand_controller_ops = {
.setup_data_interface = fsmc_setup_data_interface,
};
/**
* fsmc_nand_disable() - Disables the NAND bank
* @host: The instance to disable
*/
static void fsmc_nand_disable(struct fsmc_nand_data *host)
{
u32 val;
val = readl(host->regs_va + FSMC_PC);
val &= ~FSMC_ENABLE;
writel(val, host->regs_va + FSMC_PC);
}
/*
* fsmc_nand_probe - Probe function
* @pdev: platform device structure
@ -1141,6 +1154,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
if (host->mode == USE_DMA_ACCESS)
dma_release_channel(host->read_dma_chan);
disable_clk:
fsmc_nand_disable(host);
clk_disable_unprepare(host->clk);
return ret;
@ -1155,6 +1169,7 @@ static int fsmc_nand_remove(struct platform_device *pdev)
if (host) {
nand_release(&host->nand);
fsmc_nand_disable(host);
if (host->mode == USE_DMA_ACCESS) {
dma_release_channel(host->write_dma_chan);