These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / pinctrl / freescale / pinctrl-imx.c

diff --git a/kernel/drivers/pinctrl/freescale/pinctrl-imx.c b/kernel/drivers/pinctrl/freescale/pinctrl-imx.c
index e261f1c..a5bb939 100644 (file)
--- a/kernel/drivers/pinctrl/freescale/pinctrl-imx.c
+++ b/kernel/drivers/pinctrl/freescale/pinctrl-imx.c
@@ -18,6 +18,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/of_address.h>
 #include <linux/pinctrl/machine.h>
 #include <linux/pinctrl/pinconf.h>
 #include <linux/pinctrl/pinctrl.h>
@@ -39,6 +40,7 @@ struct imx_pinctrl {
        struct device *dev;
        struct pinctrl_dev *pctl;
        void __iomem *base;
+       void __iomem *input_sel_base;
        const struct imx_pinctrl_soc_info *info;
 };
 
@@ -254,7 +256,12 @@ static int imx_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
                         * Regular select input register can never be at offset
                         * 0, and we only print register value for regular case.
                         */
-                       writel(pin->input_val, ipctl->base + pin->input_reg);
+                       if (ipctl->input_sel_base)
+                               writel(pin->input_val, ipctl->input_sel_base +
+                                               pin->input_reg);
+                       else
+                               writel(pin->input_val, ipctl->base +
+                                               pin->input_reg);
                        dev_dbg(ipctl->dev,
                                "==>select_input: offset 0x%x val 0x%x\n",
                                pin->input_reg, pin->input_val);
@@ -542,6 +549,9 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
                struct imx_pin_reg *pin_reg;
                struct imx_pin *pin = &grp->pins[i];
 
+               if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg)
+                       mux_reg = -1;
+
                if (info->flags & SHARE_MUX_CONF_REG) {
                        conf_reg = mux_reg;
                } else {
@@ -550,7 +560,7 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
                                conf_reg = -1;
                }
 
-               pin_id = mux_reg ? mux_reg / 4 : conf_reg / 4;
+               pin_id = (mux_reg != -1) ? mux_reg / 4 : conf_reg / 4;
                pin_reg = &info->pin_regs[pin_id];
                pin->pin = pin_id;
                grp->pin_ids[i] = pin_id;
@@ -580,7 +590,6 @@ static int imx_pinctrl_parse_functions(struct device_node *np,
        struct device_node *child;
        struct imx_pmx_func *func;
        struct imx_pin_group *grp;
-       static u32 grp_index;
        u32 i = 0;
 
        dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
@@ -599,13 +608,36 @@ static int imx_pinctrl_parse_functions(struct device_node *np,
 
        for_each_child_of_node(np, child) {
                func->groups[i] = child->name;
-               grp = &info->groups[grp_index++];
+               grp = &info->groups[info->group_index++];
                imx_pinctrl_parse_groups(child, grp, info, i++);
        }
 
        return 0;
 }
 
+/*
+ * Check if the DT contains pins in the direct child nodes. This indicates the
+ * newer DT format to store pins. This function returns true if the first found
+ * fsl,pins property is in a child of np. Otherwise false is returned.
+ */
+static bool imx_pinctrl_dt_is_flat_functions(struct device_node *np)
+{
+       struct device_node *function_np;
+       struct device_node *pinctrl_np;
+
+       for_each_child_of_node(np, function_np) {
+               if (of_property_read_bool(function_np, "fsl,pins"))
+                       return true;
+
+               for_each_child_of_node(function_np, pinctrl_np) {
+                       if (of_property_read_bool(pinctrl_np, "fsl,pins"))
+                               return false;
+               }
+       }
+
+       return true;
+}
+
 static int imx_pinctrl_probe_dt(struct platform_device *pdev,
                                struct imx_pinctrl_soc_info *info)
 {
@@ -613,14 +645,20 @@ static int imx_pinctrl_probe_dt(struct platform_device *pdev,
        struct device_node *child;
        u32 nfuncs = 0;
        u32 i = 0;
+       bool flat_funcs;
 
        if (!np)
                return -ENODEV;
 
-       nfuncs = of_get_child_count(np);
-       if (nfuncs <= 0) {
-               dev_err(&pdev->dev, "no functions defined\n");
-               return -EINVAL;
+       flat_funcs = imx_pinctrl_dt_is_flat_functions(np);
+       if (flat_funcs) {
+               nfuncs = 1;
+       } else {
+               nfuncs = of_get_child_count(np);
+               if (nfuncs <= 0) {
+                       dev_err(&pdev->dev, "no functions defined\n");
+                       return -EINVAL;
+               }
        }
 
        info->nfunctions = nfuncs;
@@ -629,16 +667,24 @@ static int imx_pinctrl_probe_dt(struct platform_device *pdev,
        if (!info->functions)
                return -ENOMEM;
 
-       info->ngroups = 0;
-       for_each_child_of_node(np, child)
-               info->ngroups += of_get_child_count(child);
+       if (flat_funcs) {
+               info->ngroups = of_get_child_count(np);
+       } else {
+               info->ngroups = 0;
+               for_each_child_of_node(np, child)
+                       info->ngroups += of_get_child_count(child);
+       }
        info->groups = devm_kzalloc(&pdev->dev, info->ngroups * sizeof(struct imx_pin_group),
                                        GFP_KERNEL);
        if (!info->groups)
                return -ENOMEM;
 
-       for_each_child_of_node(np, child)
-               imx_pinctrl_parse_functions(child, info, i++);
+       if (flat_funcs) {
+               imx_pinctrl_parse_functions(np, info, 0);
+       } else {
+               for_each_child_of_node(np, child)
+                       imx_pinctrl_parse_functions(child, info, i++);
+       }
 
        return 0;
 }
@@ -646,6 +692,8 @@ static int imx_pinctrl_probe_dt(struct platform_device *pdev,
 int imx_pinctrl_probe(struct platform_device *pdev,
                      struct imx_pinctrl_soc_info *info)
 {
+       struct device_node *dev_np = pdev->dev.of_node;
+       struct device_node *np;
        struct imx_pinctrl *ipctl;
        struct resource *res;
        int ret, i;
@@ -676,6 +724,23 @@ int imx_pinctrl_probe(struct platform_device *pdev,
        if (IS_ERR(ipctl->base))
                return PTR_ERR(ipctl->base);
 
+       if (of_property_read_bool(dev_np, "fsl,input-sel")) {
+               np = of_parse_phandle(dev_np, "fsl,input-sel", 0);
+               if (np) {
+                       ipctl->input_sel_base = of_iomap(np, 0);
+                       if (IS_ERR(ipctl->input_sel_base)) {
+                               of_node_put(np);
+                               dev_err(&pdev->dev,
+                                       "iomuxc input select base address not found\n");
+                               return PTR_ERR(ipctl->input_sel_base);
+                       }
+               } else {
+                       dev_err(&pdev->dev, "iomuxc fsl,input-sel property not found\n");
+                       return -EINVAL;
+               }
+               of_node_put(np);
+       }
+
        imx_pinctrl_desc.name = dev_name(&pdev->dev);
        imx_pinctrl_desc.pins = info->pins;
        imx_pinctrl_desc.npins = info->npins;
@@ -690,9 +755,9 @@ int imx_pinctrl_probe(struct platform_device *pdev,
        ipctl->dev = info->dev;
        platform_set_drvdata(pdev, ipctl);
        ipctl->pctl = pinctrl_register(&imx_pinctrl_desc, &pdev->dev, ipctl);
-       if (!ipctl->pctl) {
+       if (IS_ERR(ipctl->pctl)) {
                dev_err(&pdev->dev, "could not register IMX pinctrl driver\n");
-               return -EINVAL;
+               return PTR_ERR(ipctl->pctl);
        }
 
        dev_info(&pdev->dev, "initialized IMX pinctrl driver\n");