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acff8aec0c
Back port the patches being submitted upstream in order to make the NAND controller work on BCM47187/5358. This is a prerequisite for supporting devices like the Netgear WNR3500L V2. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
125 lines
3.8 KiB
Diff
125 lines
3.8 KiB
Diff
From: Florian Fainelli <f.fainelli@gmail.com>
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Subject: [PATCH v3 7/9] mtd: rawnand: brcmnand: Allow platform data instantation
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Date: Fri, 07 Jan 2022 10:46:12 -0800
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Content-Type: text/plain; charset="utf-8"
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Make use of the recently refactored code in brcmnand_init_cs() and
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derive the chip-select from the platform data that is supplied. Update
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the various code paths to avoid relying on possibly non-existent
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resources, too.
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Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
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---
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drivers/mtd/nand/raw/brcmnand/brcmnand.c | 45 ++++++++++++++++++------
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1 file changed, 35 insertions(+), 10 deletions(-)
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--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
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+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
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@@ -9,6 +9,7 @@
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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+#include <linux/platform_data/brcmnand.h>
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#include <linux/err.h>
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#include <linux/completion.h>
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#include <linux/interrupt.h>
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@@ -2719,7 +2720,8 @@ static const struct nand_controller_ops
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.attach_chip = brcmnand_attach_chip,
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};
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-static int brcmnand_init_cs(struct brcmnand_host *host)
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+static int brcmnand_init_cs(struct brcmnand_host *host,
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+ const char * const *part_probe_types)
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{
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struct brcmnand_controller *ctrl = host->ctrl;
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struct device *dev = ctrl->dev;
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@@ -2772,7 +2774,7 @@ static int brcmnand_init_cs(struct brcmn
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if (ret)
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return ret;
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- ret = mtd_device_register(mtd, NULL, 0);
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+ ret = mtd_device_parse_register(mtd, part_probe_types, NULL, NULL, 0);
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if (ret)
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nand_cleanup(chip);
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@@ -2941,17 +2943,15 @@ static int brcmnand_edu_setup(struct pla
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int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
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{
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+ struct brcmnand_platform_data *pd = dev_get_platdata(&pdev->dev);
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struct device *dev = &pdev->dev;
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struct device_node *dn = dev->of_node, *child;
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struct brcmnand_controller *ctrl;
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+ struct brcmnand_host *host;
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struct resource *res;
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int ret;
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- /* We only support device-tree instantiation */
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- if (!dn)
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- return -ENODEV;
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-
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- if (!of_match_node(brcmnand_of_match, dn))
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+ if (dn && !of_match_node(brcmnand_of_match, dn))
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return -ENODEV;
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ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
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@@ -2978,7 +2978,7 @@ int brcmnand_probe(struct platform_devic
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/* NAND register range */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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ctrl->nand_base = devm_ioremap_resource(dev, res);
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- if (IS_ERR(ctrl->nand_base))
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+ if (IS_ERR(ctrl->nand_base) && !brcmnand_soc_has_ops(soc))
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return PTR_ERR(ctrl->nand_base);
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/* Enable clock before using NAND registers */
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@@ -3122,7 +3122,6 @@ int brcmnand_probe(struct platform_devic
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for_each_available_child_of_node(dn, child) {
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if (of_device_is_compatible(child, "brcm,nandcs")) {
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- struct brcmnand_host *host;
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host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
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if (!host) {
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@@ -3142,7 +3141,7 @@ int brcmnand_probe(struct platform_devic
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nand_set_flash_node(&host->chip, child);
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- ret = brcmnand_init_cs(host);
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+ ret = brcmnand_init_cs(host, NULL);
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if (ret) {
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devm_kfree(dev, host);
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continue; /* Try all chip-selects */
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@@ -3152,6 +3151,32 @@ int brcmnand_probe(struct platform_devic
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}
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}
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+ if (!list_empty(&ctrl->host_list))
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+ return 0;
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+
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+ if (!pd) {
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+ ret = -ENODEV;
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+ goto err;
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+ }
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+
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+ /* If we got there we must have been probing via platform data */
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+ host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
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+ if (!host) {
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+ ret = -ENOMEM;
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+ goto err;
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+ }
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+ host->pdev = pdev;
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+ host->ctrl = ctrl;
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+ host->cs = pd->chip_select;
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+ host->chip.ecc.size = pd->ecc_stepsize;
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+ host->chip.ecc.strength = pd->ecc_strength;
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+
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+ ret = brcmnand_init_cs(host, pd->part_probe_types);
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+ if (ret)
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+ goto err;
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+
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+ list_add_tail(&host->node, &ctrl->host_list);
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+
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/* No chip-selects could initialize properly */
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if (list_empty(&ctrl->host_list)) {
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ret = -ENODEV;
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