[PATCH v1 1/2] x86: tangier: Enable support for SD/SDIO family in the pinmux driver

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

We would need to quirk out Card Detect case and for that we allow
configuring SD/SDIO family of pins.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 arch/x86/cpu/tangier/pinmux.c | 39 ++++++++++++++++++++++++++++++-----
 1 file changed, 34 insertions(+), 5 deletions(-)

diff --git a/arch/x86/cpu/tangier/pinmux.c b/arch/x86/cpu/tangier/pinmux.c
index acf97e3af51d..8385167b2b6b 100644
--- a/arch/x86/cpu/tangier/pinmux.c
+++ b/arch/x86/cpu/tangier/pinmux.c
@@ -37,8 +37,9 @@ struct mrfld_family {
 		.npins = (e) - (s) + 1,			\
 	}
 
-/* Now we only support I2C family of pins */
+/* Now we only support SD/SDIO and I2C families of pins */
 static struct mrfld_family mrfld_families[] = {
+	MRFLD_FAMILY(3, 37, 56),
 	MRFLD_FAMILY(7, 101, 114),
 };
 
@@ -125,6 +126,34 @@ static int mrfld_pinconfig_protected(unsigned int pin, u32 mask, u32 bits)
 	return ret;
 }
 
+static int mrfld_pinconfig(unsigned int pin, u32 mask, u32 bits)
+{
+	struct mrfld_pinctrl *pinctrl;
+	struct udevice *dev;
+	void __iomem *bufcfg;
+	u32 v, value;
+	int ret;
+
+	ret = syscon_get_by_driver_data(X86_SYSCON_PINCONF, &dev);
+	if (ret)
+		return ret;
+
+	pinctrl = dev_get_priv(dev);
+
+	bufcfg = mrfld_get_bufcfg(pinctrl, pin);
+	if (!bufcfg)
+		return -EINVAL;
+
+	value = readl(bufcfg);
+	v = (value & ~mask) | (bits & mask);
+	writel(v, bufcfg);
+
+	debug("v: 0x%x p: 0x%x bits: %d, mask: %d bufcfg: 0x%p\n",
+	      v, (u32)bufcfg, bits, mask, bufcfg);
+
+	return 0;
+}
+
 static int mrfld_pinctrl_cfg_pin(ofnode pin_node)
 {
 	bool is_protected;
@@ -133,10 +162,7 @@ static int mrfld_pinctrl_cfg_pin(ofnode pin_node)
 	u32 mask;
 	int ret;
 
-	/* For now we only support just protected Family of pins */
 	is_protected = ofnode_read_bool(pin_node, "protected");
-	if (!is_protected)
-		return -ENOTSUPP;
 
 	pad_offset = ofnode_read_s32_default(pin_node, "pad-offset", -1);
 	if (pad_offset == -1)
@@ -152,7 +178,10 @@ static int mrfld_pinctrl_cfg_pin(ofnode pin_node)
 	if (mode & ~mask)
 		return -ENOTSUPP;
 
-	ret = mrfld_pinconfig_protected(pad_offset, mask, mode);
+	if (is_protected)
+		ret = mrfld_pinconfig_protected(pad_offset, mask, mode);
+	else
+		ret = mrfld_pinconfig(pad_offset, mask, mode);
 
 	return ret;
 }
-- 
2.33.0