- Add shared input select register support
- imx7d has two iomux controllers iomuxc and iomuxc-lpsr
which share select_input register for daisy chain settings
Signed-off-by: Adrian Alonso <aalo...@freescale.com>
---
Changes for V2: Resend
Changes for V3:
- Use of_parse_phandle instead of of_get_child_by_name to get input select
base register address
drivers/pinctrl/freescale/pinctrl-imx.c | 28 +++++++++++++++++++++++++++-
drivers/pinctrl/freescale/pinctrl-imx.h | 1 +
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c
b/drivers/pinctrl/freescale/pinctrl-imx.c
index 5edbca5..b39c1a0 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.c
+++ b/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 (info->flags & SHARE_INPUT_SELECT_REG)
+ 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);
@@ -690,6 +697,8 @@ 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;
@@ -715,6 +724,23 @@ int imx_pinctrl_probe(struct platform_device *pdev,
if (IS_ERR(ipctl->base))
return PTR_ERR(ipctl->base);
+ if (info->flags & SHARE_INPUT_SELECT_REG) {
+ np = of_parse_phandle(dev_np, "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 input-sel device node 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;
diff --git a/drivers/pinctrl/freescale/pinctrl-imx.h
b/drivers/pinctrl/freescale/pinctrl-imx.h
index 2a592f6..3805476 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.h
+++ b/drivers/pinctrl/freescale/pinctrl-imx.h
@@ -86,6 +86,7 @@ struct imx_pinctrl_soc_info {
#define SHARE_MUX_CONF_REG 0x1
#define ZERO_OFFSET_VALID 0x2
+#define SHARE_INPUT_SELECT_REG 0x4
#define NO_MUX 0x0
#define NO_PAD 0x0
--
2.1.4
--
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