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mmc: loongson: support setup clk stable delay time

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Changelog: 龙芯mmc驱动支持设置时钟稳定的延时时间
Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
This commit is contained in:
tao89959
2026-08-24 14:17:15 +08:00
committed by maoxiaochuan
parent ccce94639e
commit bf325c3f96
2 changed files with 13 additions and 2 deletions
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drivers/mmc/host/ls2kmci.c
+12 -2
View File
@@ -726,14 +726,16 @@ static void ls2k_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
/* Set the power state */
mci_con = readl(host->base + SDICON);
u32 dll;
u32 clk_stable_delay;
int ret;
clk_stable_delay = host->clk_need_stable ? 100 : 1;
ls2k_mci_disable_irq(host, true);
switch (ios->power_mode) {
case MMC_POWER_ON:
case MMC_POWER_UP:
writel(SDICON_RESET, host->base + SDICON);
mdelay(100);
mdelay(clk_stable_delay);
writel(0x3, host->base + SDICON);
if (host->pdata->version >= LOONGSON_SDIO_EMMC_VER_1_1)
writel(SDIINT_CLEARALL, host->base + SDIINTMSK);
@@ -765,7 +767,7 @@ static void ls2k_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
ret = of_property_read_u32(pdev->dev.of_node, "dll", &dll);
if (ret == 0)
ls2k_mci_set_dll(host, dll);
mdelay(100);
mdelay(clk_stable_delay);
ls2k_mci_enable_irq(host, true);
}
@@ -983,6 +985,14 @@ static int ls2k_mci_probe(struct platform_device *pdev)
device_property_read_u64(&pdev->dev, "clock-frequency", (u64 *)&host->clk_rate);
}
host->clk_need_stable = 1;
if (dev_fwnode(&pdev->dev)) {
if (device_property_read_u32(&pdev->dev, "clk-need-stable", (u32 *)&host->clk_need_stable))
host->clk_need_stable = 1;
}
host->clk_need_stable = !!(host->clk_need_stable);
dev_info(&pdev->dev, "clk_need_stable: %d\n", host->clk_need_stable);
mmc->ops = &ls2k_mci_ops;
mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
drivers/mmc/host/ls2kmci.h
+1
View File
@@ -266,6 +266,7 @@ struct ls2k_mci_host {
#endif
struct dma_chan *chan;
unsigned int app_cmd;
unsigned int clk_need_stable;
};
struct ls2k_mci_pdata {