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Subject[PATCH RFC v2 4/8] pinctrl: zynq: Support IO standard property
Date
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---
drivers/pinctrl/pinctrl-zynq.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-zynq.c b/drivers/pinctrl/pinctrl-zynq.c
index a32fac61cba0..f3fce76c8390 100644
--- a/drivers/pinctrl/pinctrl-zynq.c
+++ b/drivers/pinctrl/pinctrl-zynq.c
@@ -883,6 +883,18 @@ static const struct pinmux_ops zynq_pinmux_ops = {
#define ZYNQ_PINCONF_SPEED BIT(8)
#define ZYNQ_PINCONF_PULLUP BIT(12)

+#define ZYNQ_PINCONF_IOTYPE_SHIFT 9
+#define ZYNQ_PINCONF_IOTYPE_MASK (7 << ZYNQ_PINCONF_IOTYPE_SHIFT)
+
+enum zynq_io_standards {
+ zynq_iostd_min,
+ zynq_iostd_lvcmos18,
+ zynq_iostd_lvcmos25,
+ zynq_iostd_lvcmos33,
+ zynq_iostd_hstl,
+ zynq_iostd_max
+};
+
static int zynq_pinconf_cfg_get(struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long *config)
@@ -918,6 +930,10 @@ static int zynq_pinconf_cfg_get(struct pinctrl_dev *pctldev,
case PIN_CONFIG_SLEW_RATE:
arg = !!(reg & ZYNQ_PINCONF_SPEED);
break;
+ case PIN_CONFIG_IOSTANDARD:
+ arg = reg & ZYNQ_PINCONF_IOTYPE_MASK;
+ arg >>= ZYNQ_PINCONF_IOTYPE_SHIFT;
+ break;
default:
return -ENOTSUPP;
}
@@ -969,6 +985,15 @@ static int zynq_pinconf_cfg_set(struct pinctrl_dev *pctldev,
reg &= ~ZYNQ_PINCONF_SPEED;

break;
+ case PIN_CONFIG_IOSTANDARD:
+ if (arg <= zynq_iostd_min || arg >= zynq_iostd_max) {
+ dev_warn(pctldev->dev,
+ "unsupported IO standard '%u'\n",
+ param);
+ break;
+ }
+ reg |= arg << ZYNQ_PINCONF_IOTYPE_SHIFT;
+ break;
default:
dev_warn(pctldev->dev,
"unsupported configuration parameter '%u'\n",
--
2.1.2.1.g5e69ed6


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