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|
From: Florian Fainelli <f.fainelli@gmail.com>
Subject: [PATCH v3 7/9] mtd: rawnand: brcmnand: Allow platform data instantation
Date: Fri, 07 Jan 2022 10:46:12 -0800
Content-Type: text/plain; charset="utf-8"
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>
---
drivers/mtd/nand/raw/brcmnand/brcmnand.c | 45 ++++++++++++++++++------
1 file changed, 35 insertions(+), 10 deletions(-)
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -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>
@@ -2719,7 +2720,8 @@ static const struct nand_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;
@@ -2772,7 +2774,7 @@ static int brcmnand_init_cs(struct brcmn
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);
@@ -2941,17 +2943,15 @@ static int brcmnand_edu_setup(struct pla
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);
@@ -2978,7 +2978,7 @@ int brcmnand_probe(struct platform_devic
/* 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 */
@@ -3122,7 +3122,6 @@ int brcmnand_probe(struct platform_devic
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) {
@@ -3142,7 +3141,7 @@ int brcmnand_probe(struct platform_devic
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 */
@@ -3152,6 +3151,32 @@ int brcmnand_probe(struct platform_devic
}
}
+ 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;
|
