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rockchip: rk3288: Add support for drive-strength in PINCTRL

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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>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Romain Perier 2017-07-25 09:28:22 +02:00 • committed by Philipp Tomsich
parent 42ec247e69
commit 478e6f2e94
1 changed files with 9 additions and 1 deletions
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10
drivers/pinctrl/rockchip/pinctrl_rk3288.c
View file

@ -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)