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sunxi: nand: Add pinmux and clock settings for NAND support

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To enable NAND flash in sunxi SPL,
pins 0-6, 8-22 and 24 on port C are configured.

Signed-off-by: Karol Gugala <kgugala@antmicro.com>
Signed-off-by: Piotr Zierhoffer <pzierhoffer@antmicro.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Karol Gugala 2015-07-23 14:33:01 +02:00 • committed by Hans de Goede
parent 38c4f8ba4c
commit ad00829971
3 changed files with 30 additions and 0 deletions
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2
arch/arm/include/asm/arch-sunxi/clock_sun4i.h
View file

@ -267,6 +267,8 @@ struct sunxi_ccm_reg {
#define CCM_MBUS_CTRL_CLK_SRC_PLL5 0x2
#define CCM_MBUS_CTRL_GATE (0x1 << 31)
#define CCM_NAND_CTRL_ENABLE (0x1 << 31)
#define CCM_MMC_CTRL_M(x) ((x) - 1)
#define CCM_MMC_CTRL_OCLK_DLY(x) ((x) << 8)
#define CCM_MMC_CTRL_N(x) ((x) << 16)

1
arch/arm/include/asm/arch-sunxi/gpio.h
View file

@ -158,6 +158,7 @@ enum sunxi_gpio_number {
#define SUN8I_GPB_UART2 2
#define SUN8I_A33_GPB_UART0 3
#define SUNXI_GPC_NAND 2
#define SUNXI_GPC_SDC2 3
#define SUN6I_GPC_SDC3 4

27
board/sunxi/board.c
View file

@ -107,6 +107,28 @@ int dram_init(void)
return 0;
}
#if defined(CONFIG_SPL_NAND_SUNXI) && defined(CONFIG_SPL_BUILD)
static void nand_pinmux_setup(void)
{
unsigned int pin;
for (pin = SUNXI_GPC(0); pin <= SUNXI_GPC(6); pin++)
sunxi_gpio_set_cfgpin(pin, SUNXI_GPC_NAND);
for (pin = SUNXI_GPC(8); pin <= SUNXI_GPC(22); pin++)
sunxi_gpio_set_cfgpin(pin, SUNXI_GPC_NAND);
sunxi_gpio_set_cfgpin(SUNXI_GPC(24), SUNXI_GPC_NAND);
}
static void nand_clock_setup(void)
{
struct sunxi_ccm_reg *const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
setbits_le32(&ccm->ahb_gate0, (CLK_GATE_OPEN << AHB_GATE_OFFSET_NAND0));
setbits_le32(&ccm->nand0_clk_cfg, CCM_NAND_CTRL_ENABLE | AHB_DIV_1);
}
#endif
#ifdef CONFIG_GENERIC_MMC
static void mmc_pinmux_setup(int sdc)
{
@ -431,6 +453,11 @@ void sunxi_board_init(void)
power_failed |= axp221_set_eldo(3, CONFIG_AXP221_ELDO3_VOLT);
#endif
#ifdef CONFIG_SPL_NAND_SUNXI
nand_pinmux_setup();
nand_clock_setup();
#endif
printf("DRAM:");
ramsize = sunxi_dram_init();
printf(" %lu MiB\n", ramsize >> 20);