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mtd: rawnand: brcmnand: Allow platform data instantation 

Make use of the recently refactored code in brcmnand_init_cs() and
derive the chip-select from the platform data that is supplied. Update
the various code paths to avoid relying on possibly non-existent
resources, too.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220107184614.2670254-8-f.fainelli@gmail.com
This commit is contained in:
Florian Fainelli 2022-01-07 10:46:12 -08:00 committed by Miquel Raynal
parent 02d1d0e4df
commit 8e5913005f
1 changed files with 35 additions and 10 deletions
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45
drivers/mtd/nand/raw/brcmnand/brcmnand.c
View File

@ -9,6 +9,7 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/platform_data/brcmnand.h>
#include <linux/err.h>
#include <linux/completion.h>
#include <linux/interrupt.h>
@ -2768,7 +2769,8 @@ static const struct nand_controller_ops brcmnand_controller_ops = {
.attach_chip = brcmnand_attach_chip,
};
static int brcmnand_init_cs(struct brcmnand_host *host)
static int brcmnand_init_cs(struct brcmnand_host *host,
const char * const *part_probe_types)
{
struct brcmnand_controller *ctrl = host->ctrl;
struct device *dev = ctrl->dev;
@ -2821,7 +2823,7 @@ static int brcmnand_init_cs(struct brcmnand_host *host)
if (ret)
return ret;
ret = mtd_device_register(mtd, NULL, 0);
ret = mtd_device_parse_register(mtd, part_probe_types, NULL, NULL, 0);
if (ret)
nand_cleanup(chip);
@ -2990,17 +2992,15 @@ static int brcmnand_edu_setup(struct platform_device *pdev)
int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
{
struct brcmnand_platform_data *pd = dev_get_platdata(&pdev->dev);
struct device *dev = &pdev->dev;
struct device_node *dn = dev->of_node, *child;
struct brcmnand_controller *ctrl;
struct brcmnand_host *host;
struct resource *res;
int ret;
/* We only support device-tree instantiation */
if (!dn)
return -ENODEV;
if (!of_match_node(brcmnand_of_match, dn))
if (dn && !of_match_node(brcmnand_of_match, dn))
return -ENODEV;
ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
@ -3027,7 +3027,7 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
/* NAND register range */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ctrl->nand_base = devm_ioremap_resource(dev, res);
if (IS_ERR(ctrl->nand_base))
if (IS_ERR(ctrl->nand_base) && !brcmnand_soc_has_ops(soc))
return PTR_ERR(ctrl->nand_base);
/* Enable clock before using NAND registers */
@ -3171,7 +3171,6 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
for_each_available_child_of_node(dn, child) {
if (of_device_is_compatible(child, "brcm,nandcs")) {
struct brcmnand_host *host;
host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
if (!host) {
@ -3191,7 +3190,7 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
nand_set_flash_node(&host->chip, child);
ret = brcmnand_init_cs(host);
ret = brcmnand_init_cs(host, NULL);
if (ret) {
devm_kfree(dev, host);
continue; /* Try all chip-selects */
@ -3201,6 +3200,32 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
}
}
if (!list_empty(&ctrl->host_list))
return 0;
if (!pd) {
ret = -ENODEV;
goto err;
}
/* If we got there we must have been probing via platform data */
host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
if (!host) {
ret = -ENOMEM;
goto err;
}
host->pdev = pdev;
host->ctrl = ctrl;
host->cs = pd->chip_select;
host->chip.ecc.size = pd->ecc_stepsize;
host->chip.ecc.strength = pd->ecc_strength;
ret = brcmnand_init_cs(host, pd->part_probe_types);
if (ret)
goto err;
list_add_tail(&host->node, &ctrl->host_list);
/* No chip-selects could initialize properly */
if (list_empty(&ctrl->host_list)) {
ret = -ENODEV;