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mtd: rawnand: stm32_fmc2: add MP25 support

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FMC2 IP supports up to 4 chip select. On MP1 SoC, only 2 of them are
available when on MP25 SoC, the 4 chip select are available.

Let's use a platform data structure for parameters that will differ.

Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20240219140505.85794-4-christophe.kerello@foss.st.com
This commit is contained in:
Christophe Kerello 2024-02-19 15:05:05 +01:00 committed by Miquel Raynal
parent a9ae475cc6
commit 0bfad3b356
1 changed files with 45 additions and 9 deletions
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54
drivers/mtd/nand/raw/stm32_fmc2_nand.c
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@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/mtd/rawnand.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
@ -37,7 +38,7 @@
#define FMC2_MAX_SG 16
/* Max chip enable */
#define FMC2_MAX_CE 2
#define FMC2_MAX_CE 4
/* Max ECC buffer length */
#define FMC2_MAX_ECC_BUF_LEN (FMC2_BCHDSRS_LEN * FMC2_MAX_SG)
@ -243,6 +244,13 @@ static inline struct stm32_fmc2_nand *to_fmc2_nand(struct nand_chip *chip)
return container_of(chip, struct stm32_fmc2_nand, chip);
}
struct stm32_fmc2_nfc;
struct stm32_fmc2_nfc_data {
int max_ncs;
int (*set_cdev)(struct stm32_fmc2_nfc *nfc);
};
struct stm32_fmc2_nfc {
struct nand_controller base;
struct stm32_fmc2_nand nand;
@ -256,6 +264,7 @@ struct stm32_fmc2_nfc {
phys_addr_t data_phys_addr[FMC2_MAX_CE];
struct clk *clk;
u8 irq_state;
const struct stm32_fmc2_nfc_data *data;
struct dma_chan *dma_tx_ch;
struct dma_chan *dma_rx_ch;
@ -1809,7 +1818,7 @@ static int stm32_fmc2_nfc_parse_child(struct stm32_fmc2_nfc *nfc,
return ret;
}
if (cs >= FMC2_MAX_CE) {
if (cs >= nfc->data->max_ncs) {
dev_err(nfc->dev, "invalid reg value: %d\n", cs);
return -EINVAL;
}
@ -1915,9 +1924,17 @@ static int stm32_fmc2_nfc_probe(struct platform_device *pdev)
nand_controller_init(&nfc->base);
nfc->base.ops = &stm32_fmc2_nfc_controller_ops;
ret = stm32_fmc2_nfc_set_cdev(nfc);
if (ret)
return ret;
nfc->data = of_device_get_match_data(dev);
if (!nfc->data)
return -EINVAL;
if (nfc->data->set_cdev) {
ret = nfc->data->set_cdev(nfc);
if (ret)
return ret;
} else {
nfc->cdev = dev->parent;
}
ret = stm32_fmc2_nfc_parse_dt(nfc);
if (ret)
@ -1936,7 +1953,7 @@ static int stm32_fmc2_nfc_probe(struct platform_device *pdev)
if (nfc->dev == nfc->cdev)
start_region = 1;
for (chip_cs = 0, mem_region = start_region; chip_cs < FMC2_MAX_CE;
for (chip_cs = 0, mem_region = start_region; chip_cs < nfc->data->max_ncs;
chip_cs++, mem_region += 3) {
if (!(nfc->cs_assigned & BIT(chip_cs)))
continue;
@ -2092,7 +2109,7 @@ static int __maybe_unused stm32_fmc2_nfc_resume(struct device *dev)
stm32_fmc2_nfc_wp_disable(nand);
for (chip_cs = 0; chip_cs < FMC2_MAX_CE; chip_cs++) {
for (chip_cs = 0; chip_cs < nfc->data->max_ncs; chip_cs++) {
if (!(nfc->cs_assigned & BIT(chip_cs)))
continue;
@ -2105,9 +2122,28 @@ static int __maybe_unused stm32_fmc2_nfc_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(stm32_fmc2_nfc_pm_ops, stm32_fmc2_nfc_suspend,
stm32_fmc2_nfc_resume);
static const struct stm32_fmc2_nfc_data stm32_fmc2_nfc_mp1_data = {
.max_ncs = 2,
.set_cdev = stm32_fmc2_nfc_set_cdev,
};
static const struct stm32_fmc2_nfc_data stm32_fmc2_nfc_mp25_data = {
.max_ncs = 4,
};
static const struct of_device_id stm32_fmc2_nfc_match[] = {
{.compatible = "st,stm32mp15-fmc2"},
{.compatible = "st,stm32mp1-fmc2-nfc"},
{
.compatible = "st,stm32mp15-fmc2",
.data = &stm32_fmc2_nfc_mp1_data,
},
{
.compatible = "st,stm32mp1-fmc2-nfc",
.data = &stm32_fmc2_nfc_mp1_data,
},
{
.compatible = "st,stm32mp25-fmc2-nfc",
.data = &stm32_fmc2_nfc_mp25_data,
},
{}
};
MODULE_DEVICE_TABLE(of, stm32_fmc2_nfc_match);