pinctrl: mvebu: add common mpp reg helper to mvebu pinctrl include

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

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>

diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.h b/drivers/pinctrl/mvebu/pinctrl-mvebu.h
index b20d1d7..c73f4ee 100644 (file)
--- 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);