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authorRomain Perier <romain.perier@collabora.com>2017-07-24 14:00:38 (GMT)
committerRomain Perier <romain.perier@collabora.com>2017-07-24 14:01:13 (GMT)
commitce5440d7686fc977dc3aceb686e201dc1dbb4f94 (patch)
tree00f224aa866d4bf86256530703cbb7ce766f682c
parentf84b72c1050a75e5fb994f1177f5d70881634719 (diff)
downloadu-boot-rockchip-ce5440d7686fc977dc3aceb686e201dc1dbb4f94.tar.gz
u-boot-rockchip-ce5440d7686fc977dc3aceb686e201dc1dbb4f94.tar.xz
rockchip: rk3288: Add support for drive-strength in PINCTRLHEADmaster
Currently, drive-strenght to 12ma are described and supposed to be used on RK3288. However, the pinctrl driver for this SoC only handles muxing and pull up/pull down via PU/PD control registers. So complex IPs like GMAC are working in normal ethernet 100mbps, but not at 1gbps typically. This commit adds support for handling drive-strength of 12ma, when it's defined in the DT. Signed-off-by: Romain Perier <romain.perier@collabora.com>
-rw-r--r--drivers/pinctrl/rockchip/pinctrl_rk3288.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/pinctrl/rockchip/pinctrl_rk3288.c b/drivers/pinctrl/rockchip/pinctrl_rk3288.c
index 47cefc5..a21b640 100644
--- a/drivers/pinctrl/rockchip/pinctrl_rk3288.c
+++ b/drivers/pinctrl/rockchip/pinctrl_rk3288.c
@@ -729,7 +729,7 @@ static int rk3288_pinctrl_set_pins(struct udevice *dev, int banknum, int index,
value |= (mask << (shift + 16)) | (muxval << shift);
writel(value, addr);
- /* Handle pullup/pulldown */
+ /* Handle pullup/pulldown/drive-strength */
if (flags) {
uint val = 0;
@@ -737,10 +737,15 @@ static int rk3288_pinctrl_set_pins(struct udevice *dev, int banknum, int index,
val = 1;
else if (flags & (1 << PIN_CONFIG_BIAS_PULL_DOWN))
val = 2;
+ else if (flags & (1 << PIN_CONFIG_DRIVE_STRENGTH))
+ val = 3;
+
shift = (index & 7) * 2;
ind = index >> 3;
if (banknum == 0)
addr = &priv->pmu->gpio0pull[ind];
+ else if (flags & (1 << PIN_CONFIG_DRIVE_STRENGTH))
+ addr = &priv->grf->gpio1_e[banknum - 1][ind];
else
addr = &priv->grf->gpio1_p[banknum - 1][ind];
debug("%s: addr=%p, val=%x, shift=%x\n", __func__, addr, val,
@@ -779,6 +784,9 @@ static int rk3288_pinctrl_set_state(struct udevice *dev, struct udevice *config)
if (flags < 0)
return flags;
+ if (fdtdec_get_int(blob, pcfg_node, "drive-strength", 0) == 12)
+ flags |= 1 << PIN_CONFIG_DRIVE_STRENGTH;
+
ret = rk3288_pinctrl_set_pins(dev, ptr[0], ptr[1], ptr[2],
flags);
if (ret)