From 331fcabe4f9b4c7ec58d070da039f875673c9c9d Mon Sep 17 00:00:00 2001 From: Martin Fuzzey Date: Thu, 4 Oct 2018 19:59:19 +0200 Subject: [PATCH] net: dm: fec: Fix phy-reset-duration clamping and defaults The DT binding says: - phy-reset-duration : Reset duration in milliseconds. Should present only if property "phy-reset-gpios" is available. Missing the property will have the duration be 1 millisecond. Numbers greater than 1000 are invalid and 1 millisecond will be used instead. However the current code: - clamps values greater than 1000ms to 1000ms rather than 1. - does not initialize the delay if the property does not exist (else clause mismatch) - returns an error if phy-reset-gpios is not defined Fix all this and simplify by using dev_read_u32_default() Signed-off-by: Martin Fuzzey Acked-by: Joe Hershberger --- drivers/net/fec_mxc.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c index a1295fcdf6..da970ef864 100644 --- a/drivers/net/fec_mxc.c +++ b/drivers/net/fec_mxc.c @@ -1352,22 +1352,19 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev) #ifdef CONFIG_DM_GPIO ret = gpio_request_by_name(dev, "phy-reset-gpios", 0, - &priv->phy_reset_gpio, GPIOD_IS_OUT); - if (ret == 0) { - ret = dev_read_u32_array(dev, "phy-reset-duration", - &priv->reset_delay, 1); - } else if (ret == -ENOENT) { - priv->reset_delay = 1000; - ret = 0; - } + &priv->phy_reset_gpio, GPIOD_IS_OUT); + if (ret < 0) + return 0; /* property is optional, don't return error! */ + priv->reset_delay = dev_read_u32_default(dev, "phy-reset-duration", 1); if (priv->reset_delay > 1000) { - printf("FEX MXC: gpio reset timeout should be less the 1000\n"); - priv->reset_delay = 1000; + printf("FEC MXC: phy reset duration should be <= 1000ms\n"); + /* property value wrong, use default value */ + priv->reset_delay = 1; } #endif - return ret; + return 0; } static const struct udevice_id fecmxc_ids[] = { -- 2.39.5