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authorRussell King <rmk+kernel@armlinux.org.uk>2017-01-13 11:03:25 +0000
committerLinus Walleij <linus.walleij@linaro.org>2017-01-18 09:55:27 +0100
commit44aa9d0604f578cdd839d2f5295a9d920fb54999 (patch)
tree45b565301a486fffa19d3f1cf196bc368e72e94d /drivers/pinctrl/mvebu
parent20955c5f5c423bb1f2ed03c564a6657738d61955 (diff)
pinctrl: mvebu: provide generic simple mmio-based implementation
Provide a generic simple mmio-based probe function and methods, which pinctrl drivers can use to initialise the mvebu pinctrl subsystem. Most mvebu pinctrl drivers can use this. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/mvebu')
-rw-r--r--drivers/pinctrl/mvebu/pinctrl-mvebu.c57
-rw-r--r--drivers/pinctrl/mvebu/pinctrl-mvebu.h6
2 files changed, 63 insertions, 0 deletions
diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
index dd884d136916..8415761f4b01 100644
--- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c
+++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
@@ -58,6 +58,30 @@ struct mvebu_pinctrl {
u8 variant;
};
+int mvebu_mmio_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,
+ 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(data->base + off) >> shift) & MVEBU_MPP_MASK;
+
+ return 0;
+}
+
+int mvebu_mmio_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,
+ 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(data->base + off) & ~(MVEBU_MPP_MASK << shift);
+ writel(reg | (config << shift), data->base + off);
+
+ return 0;
+}
+
static struct mvebu_pinctrl_group *mvebu_pinctrl_find_group_by_pid(
struct mvebu_pinctrl *pctl, unsigned pid)
{
@@ -723,3 +747,36 @@ int mvebu_pinctrl_probe(struct platform_device *pdev)
return 0;
}
+
+/*
+ * mvebu_pinctrl_simple_mmio_probe - probe a simple mmio pinctrl
+ * @pdev: platform device (with platform data already attached)
+ *
+ * Initialise a simple (single base address) mmio pinctrl driver,
+ * assigning the MMIO base address to all mvebu mpp ctrl instances.
+ */
+int mvebu_pinctrl_simple_mmio_probe(struct platform_device *pdev)
+{
+ struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
+ struct mvebu_mpp_ctrl_data *mpp_data;
+ struct resource *res;
+ void __iomem *base;
+ int i;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ mpp_data = devm_kcalloc(&pdev->dev, soc->ncontrols, sizeof(*mpp_data),
+ GFP_KERNEL);
+ if (!mpp_data)
+ return -ENOMEM;
+
+ for (i = 0; i < soc->ncontrols; i++)
+ mpp_data[i].base = base;
+
+ soc->control_data = mpp_data;
+
+ return mvebu_pinctrl_probe(pdev);
+}
diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.h b/drivers/pinctrl/mvebu/pinctrl-mvebu.h
index 37bfa3bb56f0..c055581cf887 100644
--- a/drivers/pinctrl/mvebu/pinctrl-mvebu.h
+++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.h
@@ -214,6 +214,12 @@ static inline int default_mpp_ctrl_set(void __iomem *base, unsigned int pid,
return 0;
}
+int mvebu_mmio_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data, unsigned pid,
+ unsigned long *config);
+int mvebu_mmio_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data, unsigned pid,
+ unsigned long config);
+
int mvebu_pinctrl_probe(struct platform_device *pdev);
+int mvebu_pinctrl_simple_mmio_probe(struct platform_device *pdev);
#endif