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

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Message-Id: <20210521000405.4387-4-keguang.zhang@gmail.com>
Date:   Fri, 21 May 2021 08:04:05 +0800
From:   Keguang Zhang <keguang.zhang@...il.com>
To:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Kelvin Cheung <keguang.zhang@...il.com>
Subject: [PATCH 3/3] MIPS: Loongson1B: Add Loongson1 NAND device

From: Kelvin Cheung <keguang.zhang@...il.com>

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

Signed-off-by: Kelvin Cheung <keguang.zhang@...il.com>
---
 .../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