[PATCH 3/3] MIPS: Loongson1B: Add Loongson1 NAND device

From: Keguang Zhang
Date: Thu May 20 2021 - 20:05:15 EST


From: Kelvin Cheung <keguang.zhang@xxxxxxxxx>

This patch adds NAND device and its platform data for Loongson1B.

Signed-off-by: Kelvin Cheung <keguang.zhang@xxxxxxxxx>
---
.../include/asm/mach-loongson32/platform.h | 2 ++
arch/mips/loongson32/common/platform.c | 27 +++++++++++++++++++
arch/mips/loongson32/ls1b/board.c | 22 +++++++++++++++
3 files changed, 51 insertions(+)

diff --git a/arch/mips/include/asm/mach-loongson32/platform.h b/arch/mips/include/asm/mach-loongson32/platform.h
index d4d2a9baacdb..daf02b5c83a7 100644
--- a/arch/mips/include/asm/mach-loongson32/platform.h
+++ b/arch/mips/include/asm/mach-loongson32/platform.h
@@ -19,11 +19,13 @@ extern struct platform_device ls1x_eth1_pdev;
extern struct platform_device ls1x_ehci_pdev;
extern struct platform_device ls1x_gpio0_pdev;
extern struct platform_device ls1x_gpio1_pdev;
+extern struct platform_device ls1x_nand_pdev;
extern struct platform_device ls1x_rtc_pdev;
extern struct platform_device ls1x_wdt_pdev;

void __init ls1x_clk_init(void);
void __init ls1x_dma_set_platdata(struct plat_ls1x_dma *pdata);
+void __init ls1x_nand_set_platdata(struct plat_ls1x_nand *pdata);
void __init ls1x_rtc_set_extclk(struct platform_device *pdev);
void __init ls1x_serial_set_uartclk(struct platform_device *pdev);

diff --git a/arch/mips/loongson32/common/platform.c b/arch/mips/loongson32/common/platform.c
index 2092a7ff32e0..d47a84ecf193 100644
--- a/arch/mips/loongson32/common/platform.c
+++ b/arch/mips/loongson32/common/platform.c
@@ -287,6 +287,33 @@ struct platform_device ls1x_gpio1_pdev = {
.resource = ls1x_gpio1_resources,
};

+/* NAND Flash */
+static struct resource ls1x_nand_resources[] = {
+ [0] = {
+ .start = LS1X_NAND_BASE,
+ .end = LS1X_NAND_BASE + SZ_32 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .name = "dmachan0",
+ .start = LS1X_DMA_CHANNEL0,
+ .end = LS1X_DMA_CHANNEL0,
+ .flags = IORESOURCE_DMA,
+ },
+};
+
+struct platform_device ls1x_nand_pdev = {
+ .name = "ls1x-nand",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(ls1x_nand_resources),
+ .resource = ls1x_nand_resources,
+};
+
+void __init ls1x_nand_set_platdata(struct plat_ls1x_nand *pdata)
+{
+ ls1x_nand_pdev.dev.platform_data = pdata;
+}
+
/* USB EHCI */
static u64 ls1x_ehci_dmamask = DMA_BIT_MASK(32);

diff --git a/arch/mips/loongson32/ls1b/board.c b/arch/mips/loongson32/ls1b/board.c
index 2be4d8544444..dd5a0ce9e4fb 100644
--- a/arch/mips/loongson32/ls1b/board.c
+++ b/arch/mips/loongson32/ls1b/board.c
@@ -23,6 +23,26 @@ struct plat_ls1x_dma ls1x_dma_pdata = {
.slavecnt = ARRAY_SIZE(ls1x_dma_slave_map),
};

+static struct mtd_partition ls1x_nand_parts[] = {
+ {
+ .name = "kernel",
+ .offset = 0,
+ .size = SZ_16M,
+ },
+ {
+ .name = "rootfs",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
+ },
+};
+
+struct plat_ls1x_nand ls1x_nand_pdata = {
+ .parts = ls1x_nand_parts,
+ .nr_parts = ARRAY_SIZE(ls1x_nand_parts),
+ .hold_cycle = 0x2,
+ .wait_cycle = 0xc,
+};
+
static const struct gpio_led ls1x_gpio_leds[] __initconst = {
{
.name = "LED9",
@@ -53,6 +73,7 @@ static struct platform_device *ls1b_platform_devices[] __initdata = {
&ls1x_ehci_pdev,
&ls1x_gpio0_pdev,
&ls1x_gpio1_pdev,
+ &ls1x_nand_pdev,
&ls1x_rtc_pdev,
&ls1x_wdt_pdev,
};
@@ -61,6 +82,7 @@ static int __init ls1b_platform_init(void)
{
ls1x_serial_set_uartclk(&ls1x_uart_pdev);
ls1x_dma_set_platdata(&ls1x_dma_pdata);
+ ls1x_nand_set_platdata(&ls1x_nand_pdata);

gpio_led_register_device(-1, &ls1x_led_pdata);

--
2.30.2