Merge tag 'soc-late-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull more ARM SoC updates from Arnd Bergmann:
 "These are changes that for some reason ended up not making it into the
  first four branches but that should still make it into 6.9:

   - A rework of the omap clock support that touches both drivers and
     device tree files

   - The reset controller branch changes that had a dependency on late
     bugfixes. Merging them here avoids a backmerge of 6.8-rc5 into the
     drivers branch

   - The RISC-V/starfive, RISC-V/microchip and ARM/Broadcom devicetree
     changes that got delayed and needed some extra time in linux-next
     for wider testing"

* tag 'soc-late-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (31 commits)
  soc: fsl: dpio: fix kcalloc() argument order
  bus: ts-nbus: Improve error reporting
  bus: ts-nbus: Convert to atomic pwm API
  riscv: dts: starfive: jh7110: Add camera subsystem nodes
  ARM: bcm: stop selecing CONFIG_TICK_ONESHOT
  ARM: dts: omap3: Update clksel clocks to use reg instead of ti,bit-shift
  ARM: dts: am3: Update clksel clocks to use reg instead of ti,bit-shift
  clk: ti: Improve clksel clock bit parsing for reg property
  clk: ti: Handle possible address in the node name
  dt-bindings: pwm: opencores: Add compatible for StarFive JH8100
  dt-bindings: riscv: cpus: reg matches hart ID
  reset: Instantiate reset GPIO controller for shared reset-gpios
  reset: gpio: Add GPIO-based reset controller
  cpufreq: do not open-code of_phandle_args_equal()
  of: Add of_phandle_args_equal() helper
  reset: simple: add support for Sophgo SG2042
  dt-bindings: reset: sophgo: support SG2042
  riscv: dts: microchip: add specific compatible for mpfs pdma
  riscv: dts: microchip: add missing CAN bus clocks
  ARM: brcmstb: Add debug UART entry for 74165
  ...

1 files changed, 119 insertions, 0 deletions

diff --git a/drivers/reset/reset-gpio.c b/drivers/reset/reset-gpio.c
new file mode 100644
index 000000000000..2290b25b6703
--- /dev/null
+++ b/drivers/reset/reset-gpio.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+
+struct reset_gpio_priv {
+	struct reset_controller_dev rc;
+	struct gpio_desc *reset;
+};
+
+static inline struct reset_gpio_priv
+*rc_to_reset_gpio(struct reset_controller_dev *rc)
+{
+	return container_of(rc, struct reset_gpio_priv, rc);
+}
+
+static int reset_gpio_assert(struct reset_controller_dev *rc, unsigned long id)
+{
+	struct reset_gpio_priv *priv = rc_to_reset_gpio(rc);
+
+	gpiod_set_value_cansleep(priv->reset, 1);
+
+	return 0;
+}
+
+static int reset_gpio_deassert(struct reset_controller_dev *rc,
+			       unsigned long id)
+{
+	struct reset_gpio_priv *priv = rc_to_reset_gpio(rc);
+
+	gpiod_set_value_cansleep(priv->reset, 0);
+
+	return 0;
+}
+
+static int reset_gpio_status(struct reset_controller_dev *rc, unsigned long id)
+{
+	struct reset_gpio_priv *priv = rc_to_reset_gpio(rc);
+
+	return gpiod_get_value_cansleep(priv->reset);
+}
+
+static const struct reset_control_ops reset_gpio_ops = {
+	.assert = reset_gpio_assert,
+	.deassert = reset_gpio_deassert,
+	.status = reset_gpio_status,
+};
+
+static int reset_gpio_of_xlate(struct reset_controller_dev *rcdev,
+			       const struct of_phandle_args *reset_spec)
+{
+	return reset_spec->args[0];
+}
+
+static void reset_gpio_of_node_put(void *data)
+{
+	of_node_put(data);
+}
+
+static int reset_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct of_phandle_args *platdata = dev_get_platdata(dev);
+	struct reset_gpio_priv *priv;
+	int ret;
+
+	if (!platdata)
+		return -EINVAL;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, &priv->rc);
+
+	priv->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(priv->reset))
+		return dev_err_probe(dev, PTR_ERR(priv->reset),
+				     "Could not get reset gpios\n");
+
+	priv->rc.ops = &reset_gpio_ops;
+	priv->rc.owner = THIS_MODULE;
+	priv->rc.dev = dev;
+	priv->rc.of_args = platdata;
+	ret = devm_add_action_or_reset(dev, reset_gpio_of_node_put,
+				       priv->rc.of_node);
+	if (ret)
+		return ret;
+
+	/* Cells to match GPIO specifier, but it's not really used */
+	priv->rc.of_reset_n_cells = 2;
+	priv->rc.of_xlate = reset_gpio_of_xlate;
+	priv->rc.nr_resets = 1;
+
+	return devm_reset_controller_register(dev, &priv->rc);
+}
+
+static const struct platform_device_id reset_gpio_ids[] = {
+	{ .name = "reset-gpio", },
+	{}
+};
+MODULE_DEVICE_TABLE(platform, reset_gpio_ids);
+
+static struct platform_driver reset_gpio_driver = {
+	.probe		= reset_gpio_probe,
+	.id_table	= reset_gpio_ids,
+	.driver	= {
+		.name = "reset-gpio",
+	},
+};
+module_platform_driver(reset_gpio_driver);
+
+MODULE_AUTHOR("Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>");
+MODULE_DESCRIPTION("Generic GPIO reset driver");
+MODULE_LICENSE("GPL");