Merge tag 'pinctrl-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control updates from Linus Walleij:
 "This is the bulk of pin control changes for the v4.16 kernel cycle.
  Like with GPIO it is actually a bit calm this time.

  Core changes:

   - After lengthy discussions and partly due to my ignorance, we have
     merged a patch making pinctrl_force_default() and
     pinctrl_force_sleep() reprogram the states into the hardware of any
     hogged pins, even if they are already in the desired state.

     This only apply to hogged pins since groups of pins owned by
     drivers need to be managed by each driver, lest they could not do
     things like runtime PM and put pins to sleeping state even if the
     system as a whole is not in sleep.

  New drivers:

   - New driver for the Microsemi Ocelot SoC. This is used in ethernet
     switches.

   - The X-Powers AXP209 GPIO driver was extended to also deal with pin
     control and moved over from the GPIO subsystem. This circuit is a
     mixed-mode integrated circuit which is part of AllWinner designs.

   - New subdriver for the Qualcomm MSM8998 SoC, core of a high end
     mobile devices (phones) chipset.

   - New subdriver for the ST Microelectronics STM32MP157 MPU and
     STM32F769 MCU from the STM32 family.

   - New subdriver for the MediaTek MT7622 SoC. This is used for
     routers, repeater, gateways and such network infrastructure.

   - New subdriver for the NXP (former Freescale) i.MX 6ULL. This SoC
     has multimedia features and target "smart devices", I guess in-car
     entertainment, in-flight entertainment, industrial control panels
     etc.

  General improvements:

   - Incremental improvements on the SH-PFC subdrivers for things like
     the CAN bus.

   - Enable the glitch filter on Baytrail GPIOs used for interrupts.

   - Proper handling of pins to GPIO ranges on the Semtec SX150X

   - An IRQ setup ordering fix on MCP23S08.

   - A good set of janitorial coding style fixes"

* tag 'pinctrl-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (102 commits)
  pinctrl: mcp23s08: fix irq setup order
  pinctrl: Forward declare struct device
  pinctrl: sunxi: Use of_clk_get_parent_count() instead of open coding
  pinctrl: stm32: add STM32F769 MCU support
  pinctrl: sx150x: Add a static gpio/pinctrl pin range mapping
  pinctrl: sx150x: Register pinctrl before adding the gpiochip
  pinctrl: sx150x: Unregister the pinctrl on release
  pinctrl: ingenic: Remove redundant dev_err call in ingenic_pinctrl_probe()
  pinctrl: sprd: Use seq_putc() in sprd_pinconf_group_dbg_show()
  pinctrl: pinmux: Use seq_putc() in pinmux_pins_show()
  pinctrl: abx500: Use seq_putc() in abx500_gpio_dbg_show()
  pinctrl: mediatek: mt7622: align error handling of mtk_hw_get_value call
  pinctrl: mediatek: mt7622: fix potential uninitialized value being returned
  pinctrl: uniphier: refactor drive strength get/set functions
  pinctrl: imx7ulp: constify struct imx_cfg_params_decode
  pinctrl: imx: constify struct imx_pinctrl_soc_info
  pinctrl: imx7d: simplify imx7d_pinctrl_probe
  pinctrl: imx: use struct imx_pinctrl_soc_info as a const
  pinctrl: sunxi-pinctrl: fix pin funtion can not be match correctly.
  pinctrl: qcom: Add msm8998 pinctrl driver
  ...

1 files changed, 83 insertions, 1 deletions

diff --git a/drivers/pinctrl/pinctrl-gemini.c b/drivers/pinctrl/pinctrl-gemini.c
index c11b8f14d841..8c9970ae8505 100644
--- a/drivers/pinctrl/pinctrl-gemini.c
+++ b/drivers/pinctrl/pinctrl-gemini.c
@@ -67,6 +67,9 @@ struct gemini_pmx {
  *	elements in .pins so we can iterate over that array
  * @mask: bits to clear to enable this when doing pin muxing
  * @value: bits to set to enable this when doing pin muxing
+ * @driving_mask: bitmask for the IO Pad driving register for this
+ *	group, if it supports altering the driving strength of
+ *	its lines.
  */
 struct gemini_pin_group {
 	const char *name;
@@ -74,12 +77,14 @@ struct gemini_pin_group {
 	const unsigned int num_pins;
 	u32 mask;
 	u32 value;
+	u32 driving_mask;
 };
 
 /* Some straight-forward control registers */
 #define GLOBAL_WORD_ID		0x00
 #define GLOBAL_STATUS		0x04
 #define GLOBAL_STATUS_FLPIN	BIT(20)
+#define GLOBAL_IODRIVE		0x10
 #define GLOBAL_GMAC_CTRL_SKEW	0x1c
 #define GLOBAL_GMAC0_DATA_SKEW	0x20
 #define GLOBAL_GMAC1_DATA_SKEW	0x24
@@ -738,6 +743,7 @@ static const struct gemini_pin_group gemini_3512_pin_groups[] = {
 		/* Conflict with all flash usage */
 		.value = IDE_PADS_ENABLE | NAND_PADS_DISABLE |
 			PFLASH_PADS_DISABLE | SFLASH_PADS_DISABLE,
+		.driving_mask = GENMASK(21, 20),
 	},
 	{
 		.name = "satagrp",
@@ -753,6 +759,7 @@ static const struct gemini_pin_group gemini_3512_pin_groups[] = {
 		.name = "gmii_gmac0_grp",
 		.pins = gmii_gmac0_3512_pins,
 		.num_pins = ARRAY_SIZE(gmii_gmac0_3512_pins),
+		.driving_mask = GENMASK(17, 16),
 	},
 	{
 		.name = "gmii_gmac1_grp",
@@ -760,6 +767,7 @@ static const struct gemini_pin_group gemini_3512_pin_groups[] = {
 		.num_pins = ARRAY_SIZE(gmii_gmac1_3512_pins),
 		/* Bring out RGMII on the GMAC1 pins */
 		.value = GEMINI_GMAC_IOSEL_GMAC0_GMAC1_RGMII,
+		.driving_mask = GENMASK(19, 18),
 	},
 	{
 		.name = "pcigrp",
@@ -767,6 +775,7 @@ static const struct gemini_pin_group gemini_3512_pin_groups[] = {
 		.num_pins = ARRAY_SIZE(pci_3512_pins),
 		/* Conflict only with GPIO2 */
 		.value = PCI_PADS_ENABLE | PCI_CLK_PAD_ENABLE,
+		.driving_mask = GENMASK(23, 22),
 	},
 	{
 		.name = "lpcgrp",
@@ -1671,6 +1680,7 @@ static const struct gemini_pin_group gemini_3516_pin_groups[] = {
 		/* Conflict with all flash usage */
 		.value = IDE_PADS_ENABLE | NAND_PADS_DISABLE |
 			PFLASH_PADS_DISABLE | SFLASH_PADS_DISABLE,
+		.driving_mask = GENMASK(21, 20),
 	},
 	{
 		.name = "satagrp",
@@ -1686,6 +1696,7 @@ static const struct gemini_pin_group gemini_3516_pin_groups[] = {
 		.name = "gmii_gmac0_grp",
 		.pins = gmii_gmac0_3516_pins,
 		.num_pins = ARRAY_SIZE(gmii_gmac0_3516_pins),
+		.driving_mask = GENMASK(17, 16),
 	},
 	{
 		.name = "gmii_gmac1_grp",
@@ -1693,6 +1704,7 @@ static const struct gemini_pin_group gemini_3516_pin_groups[] = {
 		.num_pins = ARRAY_SIZE(gmii_gmac1_3516_pins),
 		/* Bring out RGMII on the GMAC1 pins */
 		.value = GEMINI_GMAC_IOSEL_GMAC0_GMAC1_RGMII,
+		.driving_mask = GENMASK(19, 18),
 	},
 	{
 		.name = "pcigrp",
@@ -1700,6 +1712,7 @@ static const struct gemini_pin_group gemini_3516_pin_groups[] = {
 		.num_pins = ARRAY_SIZE(pci_3516_pins),
 		/* Conflict only with GPIO2 */
 		.value = PCI_PADS_ENABLE | PCI_CLK_PAD_ENABLE,
+		.driving_mask = GENMASK(23, 22),
 	},
 	{
 		.name = "lpcgrp",
@@ -2015,7 +2028,8 @@ static const char * const sflashgrps[] = { "sflashgrp" };
 static const char * const gpio0grps[] = { "gpio0agrp", "gpio0bgrp", "gpio0cgrp",
 					  "gpio0dgrp", "gpio0egrp", "gpio0fgrp",
 					  "gpio0ggrp", "gpio0hgrp", "gpio0igrp",
-					  "gpio0jgrp", "gpio0kgrp" };
+					  "gpio0jgrp", "gpio0kgrp", "gpio0lgrp",
+					  "gpio0mgrp" };
 static const char * const gpio1grps[] = { "gpio1agrp", "gpio1bgrp", "gpio1cgrp",
 					  "gpio1dgrp" };
 static const char * const gpio2grps[] = { "gpio2agrp", "gpio2bgrp", "gpio2cgrp" };
@@ -2393,9 +2407,77 @@ static int gemini_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 	return ret;
 }
 
+static int gemini_pinconf_group_set(struct pinctrl_dev *pctldev,
+				    unsigned selector,
+				    unsigned long *configs,
+				    unsigned num_configs)
+{
+	struct gemini_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
+	const struct gemini_pin_group *grp = NULL;
+	enum pin_config_param param;
+	u32 arg;
+	u32 val;
+	int i;
+
+	if (pmx->is_3512)
+		grp = &gemini_3512_pin_groups[selector];
+	if (pmx->is_3516)
+		grp = &gemini_3516_pin_groups[selector];
+
+	/* First figure out if this group supports configs */
+	if (!grp->driving_mask) {
+		dev_err(pmx->dev, "pin config group \"%s\" does "
+			"not support drive strength setting\n",
+			grp->name);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			switch (arg) {
+			case 4:
+				val = 0;
+				break;
+			case 8:
+				val = 1;
+				break;
+			case 12:
+				val = 2;
+				break;
+			case 16:
+				val = 3;
+				break;
+			default:
+				dev_err(pmx->dev,
+					"invalid drive strength %d mA\n",
+					arg);
+				return -ENOTSUPP;
+			}
+			val <<= (ffs(grp->driving_mask) - 1);
+			regmap_update_bits(pmx->map, GLOBAL_IODRIVE,
+					   grp->driving_mask,
+					   val);
+			dev_info(pmx->dev,
+				 "set group %s to %d mA drive strength mask %08x val %08x\n",
+				 grp->name, arg, grp->driving_mask, val);
+			break;
+		default:
+			dev_err(pmx->dev, "invalid config param %04x\n", param);
+			return -ENOTSUPP;
+		}
+	}
+
+	return 0;
+}
+
 static const struct pinconf_ops gemini_pinconf_ops = {
 	.pin_config_get = gemini_pinconf_get,
 	.pin_config_set = gemini_pinconf_set,
+	.pin_config_group_set = gemini_pinconf_group_set,
 	.is_generic = true,
 };