[PATCH 4/6] mtd: nand: sunxi: Convert from fdtdec to ofnode
Samuel Holland
samuel at sholland.org
Thu Jul 14 05:15:24 CEST 2022
As a first step toward converting this driver to the driver model, use
the ofnode abstraction to replace direct references to the FDT blob.
Using ofnode_read_u32_index removes an extra pair of loops and makes the
allwinner,rb property optional, matching the devicetree binding.
Signed-off-by: Samuel Holland <samuel at sholland.org>
---
drivers/mtd/nand/raw/sunxi_nand.c | 73 +++++++++++--------------------
include/fdtdec.h | 1 -
lib/fdtdec.c | 1 -
3 files changed, 26 insertions(+), 49 deletions(-)
diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 0f10edfdb208..7185efbebfdd 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -25,11 +25,10 @@
*/
#include <common.h>
-#include <fdtdec.h>
+#include <dm.h>
#include <malloc.h>
#include <memalign.h>
#include <nand.h>
-#include <asm/global_data.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <linux/bitops.h>
@@ -45,8 +44,6 @@
#include <asm/gpio.h>
#include <asm/arch/clock.h>
-DECLARE_GLOBAL_DATA_PTR;
-
#define NFC_REG_CTL 0x0000
#define NFC_REG_ST 0x0004
#define NFC_REG_INT 0x0008
@@ -1605,19 +1602,18 @@ static int sunxi_nand_ecc_init(struct mtd_info *mtd, struct nand_ecc_ctrl *ecc)
return 0;
}
-static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)
+static int sunxi_nand_chip_init(ofnode np, struct sunxi_nfc *nfc, int devnum)
{
const struct nand_sdr_timings *timings;
- const void *blob = gd->fdt_blob;
struct sunxi_nand_chip *chip;
struct mtd_info *mtd;
struct nand_chip *nand;
int nsels;
int ret;
int i;
- u32 cs[8], rb[8];
+ u32 tmp;
- if (!fdt_getprop(blob, node, "reg", &nsels))
+ if (!ofnode_get_property(np, "reg", &nsels))
return -EINVAL;
nsels /= sizeof(u32);
@@ -1638,25 +1634,12 @@ static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)
chip->selected = -1;
for (i = 0; i < nsels; i++) {
- cs[i] = -1;
- rb[i] = -1;
- }
-
- ret = fdtdec_get_int_array(gd->fdt_blob, node, "reg", cs, nsels);
- if (ret) {
- dev_err(nfc->dev, "could not retrieve reg property: %d\n", ret);
- return ret;
- }
-
- ret = fdtdec_get_int_array(gd->fdt_blob, node, "allwinner,rb", rb,
- nsels);
- if (ret) {
- dev_err(nfc->dev, "could not retrieve reg property: %d\n", ret);
- return ret;
- }
-
- for (i = 0; i < nsels; i++) {
- int tmp = cs[i];
+ ret = ofnode_read_u32_index(np, "reg", i, &tmp);
+ if (ret) {
+ dev_err(nfc->dev, "could not retrieve reg property: %d\n",
+ ret);
+ return ret;
+ }
if (tmp > NFC_MAX_CS) {
dev_err(nfc->dev,
@@ -1671,15 +1654,14 @@ static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)
chip->sels[i].cs = tmp;
- tmp = rb[i];
- if (tmp >= 0 && tmp < 2) {
+ if (!ofnode_read_u32_index(np, "allwinner,rb", i, &tmp) &&
+ tmp < 2) {
chip->sels[i].rb.type = RB_NATIVE;
chip->sels[i].rb.info.nativeid = tmp;
} else {
- ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
- "rb-gpios", i,
- &chip->sels[i].rb.info.gpio,
- GPIOD_IS_IN);
+ ret = gpio_request_by_name_nodev(np, "rb-gpios", i,
+ &chip->sels[i].rb.info.gpio,
+ GPIOD_IS_IN);
if (ret)
chip->sels[i].rb.type = RB_GPIO;
else
@@ -1711,7 +1693,7 @@ static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)
* in the DT.
*/
nand->ecc.mode = NAND_ECC_HW;
- nand->flash_node = offset_to_ofnode(node);
+ nand->flash_node = np;
nand->select_chip = sunxi_nfc_select_chip;
nand->cmd_ctrl = sunxi_nfc_cmd_ctrl;
nand->read_buf = sunxi_nfc_read_buf;
@@ -1760,15 +1742,13 @@ static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)
return 0;
}
-static int sunxi_nand_chips_init(int node, struct sunxi_nfc *nfc)
+static int sunxi_nand_chips_init(ofnode node, struct sunxi_nfc *nfc)
{
- const void *blob = gd->fdt_blob;
- int nand_node;
+ ofnode nand_np;
int ret, i = 0;
- for (nand_node = fdt_first_subnode(blob, node); nand_node >= 0;
- nand_node = fdt_next_subnode(blob, nand_node)) {
- ret = sunxi_nand_chip_init(nand_node, nfc, i++);
+ ofnode_for_each_subnode(nand_np, node) {
+ ret = sunxi_nand_chip_init(nand_np, nfc, i++);
if (ret)
return ret;
}
@@ -1794,10 +1774,9 @@ static void sunxi_nand_chips_cleanup(struct sunxi_nfc *nfc)
void sunxi_nand_init(void)
{
- const void *blob = gd->fdt_blob;
struct sunxi_nfc *nfc;
- fdt_addr_t regs;
- int node;
+ phys_addr_t regs;
+ ofnode node;
int ret;
nfc = kzalloc(sizeof(*nfc), GFP_KERNEL);
@@ -1808,18 +1787,18 @@ void sunxi_nand_init(void)
init_waitqueue_head(&nfc->controller.wq);
INIT_LIST_HEAD(&nfc->chips);
- node = fdtdec_next_compatible(blob, 0, COMPAT_SUNXI_NAND);
- if (node < 0) {
+ node = ofnode_by_compatible(ofnode_null(), "allwinner,sun4i-a10-nand");
+ if (!ofnode_valid(node)) {
pr_err("unable to find nfc node in device tree\n");
goto err;
}
- if (!fdtdec_get_is_enabled(blob, node)) {
+ if (!ofnode_is_enabled(node)) {
pr_err("nfc disabled in device tree\n");
goto err;
}
- regs = fdtdec_get_addr(blob, node, "reg");
+ regs = ofnode_get_addr(node);
if (regs == FDT_ADDR_T_NONE) {
pr_err("unable to find nfc address in device tree\n");
goto err;
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 12355afd7fa1..71ec155961a2 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -187,7 +187,6 @@ enum fdt_compat_id {
COMPAT_INTEL_BAYTRAIL_FSP, /* Intel Bay Trail FSP */
COMPAT_INTEL_BAYTRAIL_FSP_MDP, /* Intel FSP memory-down params */
COMPAT_INTEL_IVYBRIDGE_FSP, /* Intel Ivy Bridge FSP */
- COMPAT_SUNXI_NAND, /* SUNXI NAND controller */
COMPAT_ALTERA_SOCFPGA_CLK, /* SoCFPGA Clock initialization */
COMPAT_ALTERA_SOCFPGA_PINCTRL_SINGLE, /* SoCFPGA pinctrl-single */
COMPAT_ALTERA_SOCFPGA_H2F_BRG, /* SoCFPGA hps2fpga bridge */
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index ffa78f97ca0a..8b54b5377876 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -62,7 +62,6 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
- COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
--
2.35.1
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