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Subject[PATCH v3 07/10] mtd: brcsmtb_nand_soc: add support for BCM63138
Date
This SoC just has its custom interrupt status bits.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/nand/brcmstb_nand_soc.c | 69 +++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)

diff --git a/drivers/mtd/nand/brcmstb_nand_soc.c b/drivers/mtd/nand/brcmstb_nand_soc.c
index 970912c690a7..c878334edb1a 100644
--- a/drivers/mtd/nand/brcmstb_nand_soc.c
+++ b/drivers/mtd/nand/brcmstb_nand_soc.c
@@ -28,7 +28,76 @@ struct brcmnand_soc_ofdata {
void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare);
};

+struct bcm63138_nand_soc_priv {
+ void __iomem *base;
+};
+
+#define BCM63138_NAND_INT_STATUS 0x00
+#define BCM63138_NAND_INT_EN 0x04
+
+enum {
+ BCM63138_CTLRDY = BIT(4),
+};
+
+static bool bcm63138_nand_intc_ack(struct brcmnand_soc *soc)
+{
+ struct bcm63138_nand_soc_priv *priv = soc->priv;
+ void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS;
+ u32 val = __raw_readl(mmio);
+
+ if (val & BCM63138_CTLRDY) {
+ __raw_writel(val & ~BCM63138_CTLRDY, mmio);
+ return true;
+ }
+
+ return false;
+}
+
+static void bcm63138_nand_intc_set(struct brcmnand_soc *soc, bool en)
+{
+ struct bcm63138_nand_soc_priv *priv = soc->priv;
+ void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN;
+ u32 val = __raw_readl(mmio);
+
+ if (en)
+ val |= BCM63138_CTLRDY;
+ else
+ val &= ~BCM63138_CTLRDY;
+
+ __raw_writel(val, mmio);
+}
+
+static int bcm63138_nand_soc_init(struct brcmnand_soc *soc)
+{
+ struct bcm63138_nand_soc_priv *priv;
+
+ priv = devm_kzalloc(soc->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->base = of_io_request_and_map(soc->dn, 0, DRV_NAME);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ soc->priv = priv;
+
+ /* Clear the interrupt */
+ bcm63138_nand_intc_ack(soc);
+
+ return 0;
+}
+
+static const struct brcmnand_soc_ofdata bcm63138_nand_soc = {
+ .init = bcm63138_nand_soc_init,
+ .ctlrdy_ack = bcm63138_nand_intc_ack,
+ .ctlrdy_set_enabled = bcm63138_nand_intc_set,
+};
+
static const struct of_device_id brcmnand_soc_ofmatch[] = {
+ {
+ .compatible = "brcm,nand-soc-bcm63138",
+ .data = &bcm63138_nand_soc,
+ },
{},
};

--
1.9.1


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