[PATCH v16 mfd 3/8] pinctrl: ocelot: add ability to be used in a non-mmio configuration

From: Colin Foster
Date: Sun Aug 14 2022 - 20:56:49 EST


There are a few Ocelot chips that contain pinctrl logic, but can be
controlled externally. Specifically the VSC7511, 7512, 7513 and 7514. In
the externally controlled configurations these registers are not
memory-mapped.

Add support for these non-memory-mapped configurations.

Signed-off-by: Colin Foster <colin.foster@xxxxxxxxxxxxxxxx>
Reviewed-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---

v16
* Add Andy Reviewed-by tag

v15
* No changes

v14
* Add Reviewed and Acked tags

---
drivers/pinctrl/pinctrl-ocelot.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-ocelot.c b/drivers/pinctrl/pinctrl-ocelot.c
index c5fd154990c8..340ca2373429 100644
--- a/drivers/pinctrl/pinctrl-ocelot.c
+++ b/drivers/pinctrl/pinctrl-ocelot.c
@@ -10,6 +10,7 @@
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/mfd/ocelot.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
@@ -1975,7 +1976,6 @@ static int ocelot_pinctrl_probe(struct platform_device *pdev)
struct ocelot_pinctrl *info;
struct reset_control *reset;
struct regmap *pincfg;
- void __iomem *base;
int ret;
struct regmap_config regmap_config = {
.reg_bits = 32,
@@ -2004,20 +2004,14 @@ static int ocelot_pinctrl_probe(struct platform_device *pdev)
"Failed to get reset\n");
reset_control_reset(reset);

- base = devm_ioremap_resource(dev,
- platform_get_resource(pdev, IORESOURCE_MEM, 0));
- if (IS_ERR(base))
- return PTR_ERR(base);
-
info->stride = 1 + (info->desc->npins - 1) / 32;

regmap_config.max_register = OCELOT_GPIO_SD_MAP * info->stride + 15 * 4;

- info->map = devm_regmap_init_mmio(dev, base, &regmap_config);
- if (IS_ERR(info->map)) {
- dev_err(dev, "Failed to create regmap\n");
- return PTR_ERR(info->map);
- }
+ info->map = ocelot_regmap_from_resource(pdev, 0, &regmap_config);
+ if (IS_ERR(info->map))
+ return dev_err_probe(dev, PTR_ERR(info->map),
+ "Failed to create regmap\n");
dev_set_drvdata(dev, info->map);
info->dev = dev;

--
2.25.1