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Date: Tue, 28 Sep 2021 17:47:27 +0530 From: mdalam@...eaurora.org To: miquel.raynal@...tlin.com, mani@...nel.org, linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org Cc: sricharan@...eaurora.org Subject: Re: [PATCH 1/3] mtd: rawnand: qcom: Add support for status pipe On 2021-09-15 15:27, Md Sadre Alam wrote: > From QPIC V2.0 onwards there is a separate pipe > to read status of each code word, called "status" pipe. > > "status" pipe will use to read CW status in case of > enhanced read mode like page scope read, multi page read. > > Signed-off-by: Md Sadre Alam <mdalam@...eaurora.org> > --- > drivers/mtd/nand/raw/qcom_nandc.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/mtd/nand/raw/qcom_nandc.c > b/drivers/mtd/nand/raw/qcom_nandc.c > index 04e6f7b..42c6291 100644 > --- a/drivers/mtd/nand/raw/qcom_nandc.c > +++ b/drivers/mtd/nand/raw/qcom_nandc.c > @@ -389,6 +389,7 @@ struct qcom_nand_controller { > struct dma_chan *tx_chan; > struct dma_chan *rx_chan; > struct dma_chan *cmd_chan; > + struct dma_chan *sts_chan; > }; > > /* will be used only by EBI2 for ADM DMA */ > @@ -2737,6 +2738,11 @@ static void qcom_nandc_unalloc(struct > qcom_nand_controller *nandc) > > if (nandc->cmd_chan) > dma_release_channel(nandc->cmd_chan); > + > + if (nandc->props->qpic_v2) { > + if (nandc->sts_chan) > + dma_release_channel(nandc->sts_chan); > + } > } else { > if (nandc->chan) > dma_release_channel(nandc->chan); > @@ -2815,6 +2821,14 @@ static int qcom_nandc_alloc(struct > qcom_nand_controller *nandc) > goto unalloc; > } > > + if (nandc->props->qpic_v2) { > + nandc->sts_chan = dma_request_slave_channel(nandc->dev, "sts"); > + if (!nandc->sts_chan) { > + dev_err(nandc->dev, "failed to request sts channel\n"); > + return -ENODEV; > + } > + } > + > /* > * Initially allocate BAM transaction to read ONFI param page. > * After detecting all the devices, this BAM transaction will Ping! Please provide me some updates on this patch.
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