[PATCH v4 05/16] pinctrl: mvebu: add common mpp reg helper to mvebu pinctrl include

[Sebastian Hesselbarth]

This adds some defines and helper functions for the common mpp reg
layout to mvebu pinctrl include.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Tested-by: Andrew Lunn <andrew@xxxxxxx>
---
Changelog:
v3->v4:
- add helper functions provided by Thomas Petazzoni

Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
Cc: Andrew Lunn <andrew@xxxxxxx>
Cc: Gregory Clement <gregory.clement@xxxxxxxxxxxxxxxxxx>
Cc: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Cc: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 drivers/pinctrl/mvebu/pinctrl-mvebu.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.h b/drivers/pinctrl/mvebu/pinctrl-mvebu.h
index b20d1d778c75..c73f4eea62ac 100644
--- a/drivers/pinctrl/mvebu/pinctrl-mvebu.h
+++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.h
@@ -186,6 +186,34 @@ struct mvebu_pinctrl_soc_info {
 		.npins = _npins,				\
 	}
 
+#define MVEBU_MPPS_PER_REG	8
+#define MVEBU_MPP_BITS		4
+#define MVEBU_MPP_MASK		0xf
+
+static inline int default_mpp_ctrl_get(void __iomem *base, unsigned int pid,
+				       unsigned long *config)
+{
+	unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
+	unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
+
+	*config = (readl(base + off) >> shift) & MVEBU_MPP_MASK;
+
+	return 0;
+}
+
+static inline int default_mpp_ctrl_set(void __iomem *base, unsigned int pid,
+				       unsigned long config)
+{
+	unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
+	unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
+	unsigned long reg;
+
+	reg = readl(base + off) & ~(MVEBU_MPP_MASK << shift);
+	writel(reg | (config << shift), base + off);
+
+	return 0;
+}
+
 int mvebu_pinctrl_probe(struct platform_device *pdev);
 int mvebu_pinctrl_remove(struct platform_device *pdev);
 
-- 
1.8.5.3

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