diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
---|---|---|
committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/mtd/nand/brcmnand/bcm63138_nand.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/mtd/nand/brcmnand/bcm63138_nand.c')
-rw-r--r-- | kernel/drivers/mtd/nand/brcmnand/bcm63138_nand.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/kernel/drivers/mtd/nand/brcmnand/bcm63138_nand.c b/kernel/drivers/mtd/nand/brcmnand/bcm63138_nand.c new file mode 100644 index 000000000..59444b3a6 --- /dev/null +++ b/kernel/drivers/mtd/nand/brcmnand/bcm63138_nand.c @@ -0,0 +1,109 @@ +/* + * Copyright © 2015 Broadcom Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/device.h> +#include <linux/io.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include "brcmnand.h" + +struct bcm63138_nand_soc { + struct brcmnand_soc soc; + 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 = + container_of(soc, struct bcm63138_nand_soc, soc); + void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS; + u32 val = brcmnand_readl(mmio); + + if (val & BCM63138_CTLRDY) { + brcmnand_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 = + container_of(soc, struct bcm63138_nand_soc, soc); + void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN; + u32 val = brcmnand_readl(mmio); + + if (en) + val |= BCM63138_CTLRDY; + else + val &= ~BCM63138_CTLRDY; + + brcmnand_writel(val, mmio); +} + +static int bcm63138_nand_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bcm63138_nand_soc *priv; + struct brcmnand_soc *soc; + struct resource *res; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + soc = &priv->soc; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-int-base"); + priv->base = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + soc->ctlrdy_ack = bcm63138_nand_intc_ack; + soc->ctlrdy_set_enabled = bcm63138_nand_intc_set; + + return brcmnand_probe(pdev, soc); +} + +static const struct of_device_id bcm63138_nand_of_match[] = { + { .compatible = "brcm,nand-bcm63138" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm63138_nand_of_match); + +static struct platform_driver bcm63138_nand_driver = { + .probe = bcm63138_nand_probe, + .remove = brcmnand_remove, + .driver = { + .name = "bcm63138_nand", + .pm = &brcmnand_pm_ops, + .of_match_table = bcm63138_nand_of_match, + } +}; +module_platform_driver(bcm63138_nand_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Brian Norris"); +MODULE_DESCRIPTION("NAND driver for BCM63138"); |