104x11C4复用为GPIO

2021-2-26 14:17| 发布者: xhh| 查看: 826| 评论: 0

类目：知识库 > LS1012A/LS1043A/LS1046A系列产品文档编号: 474

此方式为直接读写寄存器，举例说明，客户可根据自己的需求自行读写寄存器

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts

index ab87507c78be..fcfd79276be9 100644

--- a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts

+++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts

@@ -119,7 +119,7 @@

};

&i2c3 {

- status = "okay";

+ status = "disabled";

};

&duart0 {

diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c

index 06797b34b1a4..c62a4adfe255 100644

--- a/drivers/mmc/host/sdhci-of-esdhc.c

+++ b/drivers/mmc/host/sdhci-of-esdhc.c

@@ -844,6 +844,8 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)

struct sdhci_pltfm_host *pltfm_host;

struct sdhci_esdhc *esdhc;

int ret;

+ u32 value;

+ void __iomem *CFG_RCWPMUXCR0;

np = pdev->dev.of_node;

@@ -862,6 +864,15 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)

host->mmc_host_ops.execute_tuning = esdhc_execute_tuning;

host->tuning_delay = 1;

+ CFG_RCWPMUXCR0=ioremap(0x157040C, 0x04);

+ value = ioread32be(CFG_RCWPMUXCR0);

+ printk("CFG_RCWPMUXCR0 is %x ----------1111\n",value);

+ value |= 0x11;

+ iowrite32be(0x11, CFG_RCWPMUXCR0);

+ value = ioread32be(CFG_RCWPMUXCR0);

+ printk("CFG_RCWPMUXCR0 is %x ----------2222\n",value);

+ iounmap(CFG_RCWPMUXCR0);

esdhc_init(pdev, host);

sdhci_get_of_property(pdev);

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