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https://github.com/brain-hackers/u-boot-brain
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rockchip: mmc: Use a pwrseq device if available
Use the pwrseq uclass to find a suitable power sequence for the MMC device. If this is enabled in the device tree, we will pick it up automatically. Signed-off-by: Simon Glass <sjg@chromium.org>
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@ -9,7 +9,9 @@
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#include <dm.h>
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#include <dm.h>
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#include <dwmmc.h>
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#include <dwmmc.h>
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#include <errno.h>
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#include <errno.h>
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#include <pwrseq.h>
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#include <syscon.h>
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#include <syscon.h>
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#include <asm/gpio.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/periph.h>
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#include <asm/arch/periph.h>
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#include <linux/err.h>
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#include <linux/err.h>
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@ -64,6 +66,7 @@ static int rockchip_dwmmc_probe(struct udevice *dev)
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struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
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struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
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struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
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struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
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struct dwmci_host *host = &priv->host;
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struct dwmci_host *host = &priv->host;
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struct udevice *pwr_dev __maybe_unused;
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u32 minmax[2];
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u32 minmax[2];
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int ret;
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int ret;
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int fifo_depth;
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int fifo_depth;
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@ -90,6 +93,16 @@ static int rockchip_dwmmc_probe(struct udevice *dev)
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if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "fifo-mode"))
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if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "fifo-mode"))
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host->fifo_mode = true;
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host->fifo_mode = true;
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#ifdef CONFIG_PWRSEQ
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/* Enable power if needed */
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ret = uclass_get_device_by_phandle(UCLASS_PWRSEQ, dev, "mmc-pwrseq",
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&pwr_dev);
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if (!ret) {
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ret = pwrseq_set_power(pwr_dev, true);
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if (ret)
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return ret;
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}
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#endif
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ret = add_dwmci(host, minmax[1], minmax[0]);
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ret = add_dwmci(host, minmax[1], minmax[0]);
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if (ret)
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if (ret)
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return ret;
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return ret;
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@ -112,3 +125,37 @@ U_BOOT_DRIVER(rockchip_dwmmc_drv) = {
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.probe = rockchip_dwmmc_probe,
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.probe = rockchip_dwmmc_probe,
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.priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv),
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.priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv),
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};
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};
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#ifdef CONFIG_PWRSEQ
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static int rockchip_dwmmc_pwrseq_set_power(struct udevice *dev, bool enable)
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{
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struct gpio_desc reset;
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int ret;
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ret = gpio_request_by_name(dev, "reset-gpios", 0, &reset, GPIOD_IS_OUT);
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if (ret)
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return ret;
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dm_gpio_set_value(&reset, 1);
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udelay(1);
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dm_gpio_set_value(&reset, 0);
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udelay(200);
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return 0;
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}
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static const struct pwrseq_ops rockchip_dwmmc_pwrseq_ops = {
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.set_power = rockchip_dwmmc_pwrseq_set_power,
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};
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static const struct udevice_id rockchip_dwmmc_pwrseq_ids[] = {
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{ .compatible = "mmc-pwrseq-emmc" },
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{ }
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};
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U_BOOT_DRIVER(rockchip_dwmmc_pwrseq_drv) = {
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.name = "mmc_pwrseq_emmc",
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.id = UCLASS_PWRSEQ,
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.of_match = rockchip_dwmmc_pwrseq_ids,
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.ops = &rockchip_dwmmc_pwrseq_ops,
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};
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#endif
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