[PATCH v5 5/9] pinctrl: nuvoton: Add driver for WPCM450

Jonathan Neuschäfer
2022-01-29T11:58:00Z

This driver is based on the one for NPCM7xx, because the WPCM450 is a
predecessor of those SoCs. Notable differences:

- On WPCM450, the GPIO registers are not organized in multiple banks,
but rather placed continually into the same register block. This
affects how register offsets are computed.
- Pinmux nodes can explicitly select GPIO mode, whereas in the npcm7xx
driver, this happens automatically when a GPIO is requested.

Some functionality implemented in the hardware was (for now) left unused
in the driver, specifically blinking and pull-up/down.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
---

This patch has a few checkpatch warnings, which are inherited from the
pinctrl-npcm7xx driver. I decided to ignore those. Specifically:
(1) WPCM450_GRPS is an unwrapped list; (2) use of -ENOTSUPP is discouraged.

v5:
- Switch to raw_spinlock for serializing register accesses

v4:
- https://lore.kernel.org/lkml/20220109173000.1242703-6-j.neuschaefer@gmx.net/
- A few more cleanups, as suggested by Andy Shevchenko
- Change fwnode_property_read_u32 argument to u32

v3:
- https://lore.kernel.org/lkml/20211224200935.93817-6-j.neuschaefer@gmx.net/
- make gc the first member of struct wpcm450_gpio, to simplify pointer arithmetic
- Add empty line between <linux> includes and <linux/pinctrl> includes
- Add a comment explaining wpcm450_gpio_fix_evpol
- Use generic_handle_domain_irq
- Rename struct fwnode_handle *np to child
- Convert instances of dev_err() to dev_err_probe() and simplify return
- Use device_for_each_child_node loop
- Remove gpio->gc.parent assignment (already done in bgpio_init)
- Move gpiochip_add_pin_range() to .add_pin_ranges callback
- Use GENMASK in calculation of IRQ bitmask
- I decided to keep using __assign_bit throughout the driver, because it keeps the code short
- Remove nuvoton,interrupt-map again, to simplify the binding
- Use gpio_chip->fwnode
- I decided against using the bitmap_* API in(place of) wpcm450_gpio_irq_bitnum,
etc., because I find the current solution clear enough, even though the
mapping functions are somewhat verbose.

v2:
- https://lore.kernel.org/lkml/20211207210823.1975632-6-j.neuschaefer@gmx.net/
- Adjust to binding change which put each GPIO bank into its own node
- Use generic GPIO support
- Make it possible to set pinmux to GPIO explicitly
- Allow building the driver as a module
- Fix spelling of "spin lock" in text
- Include <linux/mod_devicetable.h>
- Move linux/pinctrl/* headers to the end of the #include block
- Remove/rework comments and printk messages
- Switch to fwnode API
- Remove comma after sentinel {}
- Use dev_err_probe
- Improve Kconfig help message
- Declare for_each_set_bit iterator as unsigned int
- Use __assign_bit
- Set parent irq handler in set_irq_type callback
- Use struct group_desc
- Don't hide sysfs bind attributes
- Remove unnecessary check for gpio-controller property
- Use module_platform_driver()

v1:
- https://lore.kernel.org/lkml/20210602120329.2444672-6-j.neuschaefer@gmx.net/

---
Everything following the line with "---" will be ignored

rawspin---------------------------------------------------------------
---
MAINTAINERS | 1 +
drivers/pinctrl/Makefile | 2 +-
drivers/pinctrl/nuvoton/Kconfig | 18 +
drivers/pinctrl/nuvoton/Makefile | 1 +
drivers/pinctrl/nuvoton/pinctrl-wpcm450.c | 1150 +++++++++++++++++++++
5 files changed, 1171 insertions(+), 1 deletion(-)
create mode 100644 drivers/pinctrl/nuvoton/pinctrl-wpcm450.c

diff --git a/MAINTAINERS b/MAINTAINERS
index d84dde42e33d3..2e40213eda1c5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2377,6 +2377,7 @@ S: Maintained
F: Documentation/devicetree/bindings/*/*wpcm*
F: arch/arm/boot/dts/nuvoton-wpcm450*
F: arch/arm/mach-npcm/wpcm450.c
+F: drivers/*/*/*wpcm*
F: drivers/*/*wpcm*

ARM/NXP S32G ARCHITECTURE
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 08c364d611f5a..fa2a3616a6615 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -62,7 +62,7 @@ obj-y += mediatek/
obj-$(CONFIG_PINCTRL_MESON) += meson/
obj-y += mvebu/
obj-y += nomadik/
-obj-$(CONFIG_ARCH_NPCM7XX) += nuvoton/
+obj-y += nuvoton/
obj-$(CONFIG_PINCTRL_PXA) += pxa/
obj-$(CONFIG_ARCH_QCOM) += qcom/
obj-$(CONFIG_PINCTRL_RALINK) += ralink/
diff --git a/drivers/pinctrl/nuvoton/Kconfig b/drivers/pinctrl/nuvoton/Kconfig
index 48ba0469edda6..6a3c6f2a73f2d 100644
--- a/drivers/pinctrl/nuvoton/Kconfig
+++ b/drivers/pinctrl/nuvoton/Kconfig
@@ -1,4 +1,22 @@
# SPDX-License-Identifier: GPL-2.0-only
+
+config PINCTRL_WPCM450
+ tristate "Pinctrl and GPIO driver for Nuvoton WPCM450"
+ depends on ARCH_WPCM450 || COMPILE_TEST
+ select PINMUX
+ select PINCONF
+ select GENERIC_PINCONF
+ select GPIOLIB
+ select GPIO_GENERIC
+ select GPIOLIB_IRQCHIP
+ help
+ Say Y or M here to enable pin controller and GPIO support for
+ the Nuvoton WPCM450 SoC. This is strongly recommended when
+ building a kernel that will run on this chip.
+
+ If this driver is compiled as a module, it will be named
+ pinctrl-wpcm450.
+
config PINCTRL_NPCM7XX
bool "Pinctrl and GPIO driver for Nuvoton NPCM7XX"
depends on (ARCH_NPCM7XX || COMPILE_TEST) && OF
diff --git a/drivers/pinctrl/nuvoton/Makefile b/drivers/pinctrl/nuvoton/Makefile
index 886d00784cef5..9e66f5dc74bfc 100644
--- a/drivers/pinctrl/nuvoton/Makefile
+++ b/drivers/pinctrl/nuvoton/Makefile
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
# Nuvoton pinctrl support

+obj-$(CONFIG_PINCTRL_WPCM450) += pinctrl-wpcm450.o
obj-$(CONFIG_PINCTRL_NPCM7XX) += pinctrl-npcm7xx.o
diff --git a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
new file mode 100644
index 0000000000000..661aa963e3fc5
--- /dev/null
+++ b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
@@ -0,0 +1,1150 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2016-2018 Nuvoton Technology corporation.
+// Copyright (c) 2016, Dell Inc
+// Copyright (c) 2021-2022 Jonathan Neuschäfer
+//
+// This driver uses the following registers:
+// - Pin mux registers, in the GCR (general control registers) block
+// - GPIO registers, specific to each GPIO bank
+// - GPIO event (interrupt) registers, located centrally in the GPIO register
+// block, shared between all GPIO banks
+
+#include <linux/device.h>
+#include <linux/fwnode.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include "../core.h"
+
+/* GCR registers */
+#define WPCM450_GCR_MFSEL1 0x0c
+#define WPCM450_GCR_MFSEL2 0x10
+#define WPCM450_GCR_NONE 0
+
+/* GPIO event (interrupt) registers */
+#define WPCM450_GPEVTYPE 0x00
+#define WPCM450_GPEVPOL 0x04
+#define WPCM450_GPEVDBNC 0x08
+#define WPCM450_GPEVEN 0x0c
+#define WPCM450_GPEVST 0x10
+
+#define WPCM450_NUM_BANKS 8
+#define WPCM450_NUM_GPIOS 128
+#define WPCM450_NUM_GPIO_IRQS 4
+
+struct wpcm450_pinctrl;
+struct wpcm450_bank;
+
+struct wpcm450_gpio {
+ struct gpio_chip gc;
+ struct wpcm450_pinctrl *pctrl;
+ struct irq_chip irqc;
+ const struct wpcm450_bank *bank;
+};
+
+struct wpcm450_pinctrl {
+ struct pinctrl_dev *pctldev;
+ struct device *dev;
+ struct irq_domain *domain;
+ struct regmap *gcr_regmap;
+ void __iomem *gpio_base;
+ struct wpcm450_gpio gpio_bank[WPCM450_NUM_BANKS];
+ unsigned long both_edges;
+
+ /*
+ * This spin lock protects registers and struct wpcm450_pinctrl fields
+ * against concurrent access.
+ */
+ raw_spinlock_t lock;
+};
+
+struct wpcm450_bank {
+ /* Range of GPIOs in this port */
+ u8 base;
+ u8 length;
+
+ /* Register offsets (0 = register doesn't exist in this port) */
+ u8 cfg0, cfg1, cfg2;
+ u8 blink;
+ u8 dataout, datain;
+
+ /* Interrupt bit mapping */
+ u8 first_irq_bit; /* First bit in GPEVST that belongs to this bank */
+ u8 num_irqs; /* Number of IRQ-capable GPIOs in this bank */
+ u8 first_irq_gpio; /* First IRQ-capable GPIO in this bank */
+};
+
+static const struct wpcm450_bank wpcm450_banks[WPCM450_NUM_BANKS] = {
+ /* range cfg0 cfg1 cfg2 blink out in IRQ map */
+ { 0, 16, 0x14, 0x18, 0, 0, 0x1c, 0x20, 0, 16, 0 },
+ { 16, 16, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 16, 2, 8 },
+ { 32, 16, 0x3c, 0x40, 0x44, 0, 0x48, 0x4c, 0, 0, 0 },
+ { 48, 16, 0x50, 0x54, 0x58, 0, 0x5c, 0x60, 0, 0, 0 },
+ { 64, 16, 0x64, 0x68, 0x6c, 0, 0x70, 0x74, 0, 0, 0 },
+ { 80, 16, 0x78, 0x7c, 0x80, 0, 0x84, 0x88, 0, 0, 0 },
+ { 96, 18, 0, 0, 0, 0, 0, 0x8c, 0, 0, 0 },
+ { 114, 14, 0x90, 0x94, 0x98, 0, 0x9c, 0xa0, 0, 0, 0 },
+};
+
+static int wpcm450_gpio_irq_bitnum(struct wpcm450_gpio *gpio, struct irq_data *d)
+{
+ const struct wpcm450_bank *bank = gpio->bank;
+ int hwirq = irqd_to_hwirq(d);
+
+ if (hwirq < bank->first_irq_gpio)
+ return -EINVAL;
+
+ if (hwirq - bank->first_irq_gpio >= bank->num_irqs)
+ return -EINVAL;
+
+ return hwirq - bank->first_irq_gpio + bank->first_irq_bit;
+}
+
+static int wpcm450_irq_bitnum_to_gpio(struct wpcm450_gpio *gpio, int bitnum)
+{
+ const struct wpcm450_bank *bank = gpio->bank;
+
+ if (bitnum < bank->first_irq_bit)
+ return -EINVAL;
+
+ if (bitnum - bank->first_irq_bit > bank->num_irqs)
+ return -EINVAL;
+
+ return bitnum - bank->first_irq_bit + bank->first_irq_gpio;
+}
+
+static void wpcm450_gpio_irq_ack(struct irq_data *d)
+{
+ struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct wpcm450_pinctrl *pctrl = gpio->pctrl;
+ unsigned long flags;
+ int bit;
+
+ bit = wpcm450_gpio_irq_bitnum(gpio, d);
+ if (bit < 0)
+ return;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ iowrite32(BIT(bit), pctrl->gpio_base + WPCM450_GPEVST);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static void wpcm450_gpio_irq_mask(struct irq_data *d)
+{
+ struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct wpcm450_pinctrl *pctrl = gpio->pctrl;
+ unsigned long flags;
+ unsigned long even;
+ int bit;
+
+ bit = wpcm450_gpio_irq_bitnum(gpio, d);
+ if (bit < 0)
+ return;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ even = ioread32(pctrl->gpio_base + WPCM450_GPEVEN);
+ __assign_bit(bit, &even, 0);
+ iowrite32(even, pctrl->gpio_base + WPCM450_GPEVEN);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static void wpcm450_gpio_irq_unmask(struct irq_data *d)
+{
+ struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct wpcm450_pinctrl *pctrl = gpio->pctrl;
+ unsigned long flags;
+ unsigned long even;
+ int bit;
+
+ bit = wpcm450_gpio_irq_bitnum(gpio, d);
+ if (bit < 0)
+ return;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ even = ioread32(pctrl->gpio_base + WPCM450_GPEVEN);
+ __assign_bit(bit, &even, 1);
+ iowrite32(even, pctrl->gpio_base + WPCM450_GPEVEN);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+/*
+ * This is an implementation of the gpio_chip->get() function, for use in
+ * wpcm450_gpio_fix_evpol. Unfortunately, we can't use the bgpio-provided
+ * implementation there, because it would require taking gpio_chip->bgpio_lock,
+ * which is a spin lock, but wpcm450_gpio_fix_evpol must work in contexts where
+ * a raw spin lock is held.
+ */
+static int wpcm450_gpio_get(struct wpcm450_gpio *gpio, int offset)
+{
+ void __iomem *reg = gpio->pctrl->gpio_base + gpio->bank->datain;
+ unsigned long flags;
+ u32 level;
+
+ raw_spin_lock_irqsave(&gpio->pctrl->lock, flags);
+ level = !!(ioread32(reg) & BIT(offset));
+ raw_spin_unlock_irqrestore(&gpio->pctrl->lock, flags);
+
+ return level;
+}
+
+/*
+ * Since the GPIO controller does not support dual-edge triggered interrupts
+ * (IRQ_TYPE_EDGE_BOTH), they are emulated using rising/falling edge triggered
+ * interrupts. wpcm450_gpio_fix_evpol sets the interrupt polarity for the
+ * specified emulated dual-edge triggered interrupts, so that the next edge can
+ * be detected.
+ */
+static void wpcm450_gpio_fix_evpol(struct wpcm450_gpio *gpio, unsigned long all)
+{
+ struct wpcm450_pinctrl *pctrl = gpio->pctrl;
+ unsigned int bit;
+
+ for_each_set_bit(bit, &all, 32) {
+ int offset = wpcm450_irq_bitnum_to_gpio(gpio, bit);
+ unsigned long evpol;
+ unsigned long flags;
+ int level;
+
+ do {
+ level = wpcm450_gpio_get(gpio, offset);
+
+ /* Switch event polarity to the opposite of the current level */
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ evpol = ioread32(pctrl->gpio_base + WPCM450_GPEVPOL);
+ __assign_bit(bit, &evpol, !level);
+ iowrite32(evpol, pctrl->gpio_base + WPCM450_GPEVPOL);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ } while (wpcm450_gpio_get(gpio, offset) != level);
+ }
+}
+
+static int wpcm450_gpio_set_irq_type(struct irq_data *d, unsigned int flow_type)
+{
+ struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct wpcm450_pinctrl *pctrl = gpio->pctrl;
+ unsigned long evtype, evpol;
+ unsigned long flags;
+ int ret = 0;
+ int bit;
+
+ bit = wpcm450_gpio_irq_bitnum(gpio, d);
+ if (bit < 0)
+ return bit;
+
+ irq_set_handler_locked(d, handle_level_irq);
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ evtype = ioread32(pctrl->gpio_base + WPCM450_GPEVTYPE);
+ evpol = ioread32(pctrl->gpio_base + WPCM450_GPEVPOL);
+ __assign_bit(bit, &pctrl->both_edges, 0);
+ switch (flow_type) {
+ case IRQ_TYPE_LEVEL_LOW:
+ __assign_bit(bit, &evtype, 1);
+ __assign_bit(bit, &evpol, 0);
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ __assign_bit(bit, &evtype, 1);
+ __assign_bit(bit, &evpol, 1);
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ __assign_bit(bit, &evtype, 0);
+ __assign_bit(bit, &evpol, 0);
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ __assign_bit(bit, &evtype, 0);
+ __assign_bit(bit, &evpol, 1);
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ __assign_bit(bit, &evtype, 0);
+ __assign_bit(bit, &pctrl->both_edges, 1);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ iowrite32(evtype, pctrl->gpio_base + WPCM450_GPEVTYPE);
+ iowrite32(evpol, pctrl->gpio_base + WPCM450_GPEVPOL);
+
+ /* clear the event status for good measure */
+ iowrite32(BIT(bit), pctrl->gpio_base + WPCM450_GPEVST);
+
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ /* fix event polarity after clearing event status */
+ wpcm450_gpio_fix_evpol(gpio, BIT(bit));
+
+ return ret;
+}
+
+static const struct irq_chip wpcm450_gpio_irqchip = {
+ .name = "WPCM450-GPIO-IRQ",
+ .irq_ack = wpcm450_gpio_irq_ack,
+ .irq_unmask = wpcm450_gpio_irq_unmask,
+ .irq_mask = wpcm450_gpio_irq_mask,
+ .irq_set_type = wpcm450_gpio_set_irq_type,
+};
+
+static void wpcm450_gpio_irqhandler(struct irq_desc *desc)
+{
+ struct wpcm450_gpio *gpio = gpiochip_get_data(irq_desc_get_handler_data(desc));
+ struct wpcm450_pinctrl *pctrl = gpio->pctrl;
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned long pending;
+ unsigned long flags;
+ unsigned long ours;
+ unsigned int bit;
+
+ ours = GENMASK(gpio->bank->num_irqs - 1, 0) << gpio->bank->first_irq_bit;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+ pending = ioread32(pctrl->gpio_base + WPCM450_GPEVST);
+ pending &= ioread32(pctrl->gpio_base + WPCM450_GPEVEN);
+ pending &= ours;
+
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ if (pending & pctrl->both_edges)
+ wpcm450_gpio_fix_evpol(gpio, pending & pctrl->both_edges);
+
+ chained_irq_enter(chip, desc);
+ for_each_set_bit(bit, &pending, 32) {
+ int offset = wpcm450_irq_bitnum_to_gpio(gpio, bit);
+
+ generic_handle_domain_irq(gpio->gc.irq.domain, offset);
+ }
+ chained_irq_exit(chip, desc);
+}
+
+static int smb0_pins[] = { 115, 114 };
+static int smb1_pins[] = { 117, 116 };
+static int smb2_pins[] = { 119, 118 };
+static int smb3_pins[] = { 30, 31 };
+static int smb4_pins[] = { 28, 29 };
+static int smb5_pins[] = { 26, 27 };
+
+static int scs1_pins[] = { 32 };
+static int scs2_pins[] = { 33 };
+static int scs3_pins[] = { 34 };
+
+static int bsp_pins[] = { 41, 42 };
+static int hsp1_pins[] = { 43, 44, 45, 46, 47, 61, 62, 63 };
+static int hsp2_pins[] = { 48, 49, 50, 51, 52, 53, 54, 55 };
+
+static int r1err_pins[] = { 56 };
+static int r1md_pins[] = { 57, 58 };
+static int rmii2_pins[] = { 84, 85, 86, 87, 88, 89 };
+static int r2err_pins[] = { 90 };
+static int r2md_pins[] = { 91, 92 };
+
+static int kbcc_pins[] = { 94, 93 };
+static int clko_pins[] = { 96 };
+static int smi_pins[] = { 97 };
+static int uinc_pins[] = { 19 };
+static int mben_pins[] = {};
+
+static int gspi_pins[] = { 12, 13, 14, 15 };
+static int sspi_pins[] = { 12, 13, 14, 15 };
+
+static int xcs1_pins[] = { 35 };
+static int xcs2_pins[] = { 36 };
+
+static int sdio_pins[] = { 7, 22, 43, 44, 45, 46, 47, 60 };
+
+static int fi0_pins[] = { 64 };
+static int fi1_pins[] = { 65 };
+static int fi2_pins[] = { 66 };
+static int fi3_pins[] = { 67 };
+static int fi4_pins[] = { 68 };
+static int fi5_pins[] = { 69 };
+static int fi6_pins[] = { 70 };
+static int fi7_pins[] = { 71 };
+static int fi8_pins[] = { 72 };
+static int fi9_pins[] = { 73 };
+static int fi10_pins[] = { 74 };
+static int fi11_pins[] = { 75 };
+static int fi12_pins[] = { 76 };
+static int fi13_pins[] = { 77 };
+static int fi14_pins[] = { 78 };
+static int fi15_pins[] = { 79 };
+
+static int pwm0_pins[] = { 80 };
+static int pwm1_pins[] = { 81 };
+static int pwm2_pins[] = { 82 };
+static int pwm3_pins[] = { 83 };
+static int pwm4_pins[] = { 20 };
+static int pwm5_pins[] = { 21 };
+static int pwm6_pins[] = { 16 };
+static int pwm7_pins[] = { 17 };
+
+static int hg0_pins[] = { 20 };
+static int hg1_pins[] = { 21 };
+static int hg2_pins[] = { 22 };
+static int hg3_pins[] = { 23 };
+static int hg4_pins[] = { 24 };
+static int hg5_pins[] = { 25 };
+static int hg6_pins[] = { 59 };
+static int hg7_pins[] = { 60 };
+
+#define WPCM450_GRPS \
+ WPCM450_GRP(smb3), \
+ WPCM450_GRP(smb4), \
+ WPCM450_GRP(smb5), \
+ WPCM450_GRP(scs1), \
+ WPCM450_GRP(scs2), \
+ WPCM450_GRP(scs3), \
+ WPCM450_GRP(smb0), \
+ WPCM450_GRP(smb1), \
+ WPCM450_GRP(smb2), \
+ WPCM450_GRP(bsp), \
+ WPCM450_GRP(hsp1), \
+ WPCM450_GRP(hsp2), \
+ WPCM450_GRP(r1err), \
+ WPCM450_GRP(r1md), \
+ WPCM450_GRP(rmii2), \
+ WPCM450_GRP(r2err), \
+ WPCM450_GRP(r2md), \
+ WPCM450_GRP(kbcc), \
+ WPCM450_GRP(clko), \
+ WPCM450_GRP(smi), \
+ WPCM450_GRP(uinc), \
+ WPCM450_GRP(gspi), \
+ WPCM450_GRP(mben), \
+ WPCM450_GRP(xcs2), \
+ WPCM450_GRP(xcs1), \
+ WPCM450_GRP(sdio), \
+ WPCM450_GRP(sspi), \
+ WPCM450_GRP(fi0), \
+ WPCM450_GRP(fi1), \
+ WPCM450_GRP(fi2), \
+ WPCM450_GRP(fi3), \
+ WPCM450_GRP(fi4), \
+ WPCM450_GRP(fi5), \
+ WPCM450_GRP(fi6), \
+ WPCM450_GRP(fi7), \
+ WPCM450_GRP(fi8), \
+ WPCM450_GRP(fi9), \
+ WPCM450_GRP(fi10), \
+ WPCM450_GRP(fi11), \
+ WPCM450_GRP(fi12), \
+ WPCM450_GRP(fi13), \
+ WPCM450_GRP(fi14), \
+ WPCM450_GRP(fi15), \
+ WPCM450_GRP(pwm0), \
+ WPCM450_GRP(pwm1), \
+ WPCM450_GRP(pwm2), \
+ WPCM450_GRP(pwm3), \
+ WPCM450_GRP(pwm4), \
+ WPCM450_GRP(pwm5), \
+ WPCM450_GRP(pwm6), \
+ WPCM450_GRP(pwm7), \
+ WPCM450_GRP(hg0), \
+ WPCM450_GRP(hg1), \
+ WPCM450_GRP(hg2), \
+ WPCM450_GRP(hg3), \
+ WPCM450_GRP(hg4), \
+ WPCM450_GRP(hg5), \
+ WPCM450_GRP(hg6), \
+ WPCM450_GRP(hg7), \
+
+enum {
+#define WPCM450_GRP(x) fn_ ## x
+ WPCM450_GRPS
+ /* add placeholder for none/gpio */
+ WPCM450_GRP(gpio),
+ WPCM450_GRP(none),
+#undef WPCM450_GRP
+};
+
+static struct group_desc wpcm450_groups[] = {
+#define WPCM450_GRP(x) { .name = #x, .pins = x ## _pins, \
+ .num_pins = ARRAY_SIZE(x ## _pins) }
+ WPCM450_GRPS
+#undef WPCM450_GRP
+};
+
+#define WPCM450_SFUNC(a) WPCM450_FUNC(a, #a)
+#define WPCM450_FUNC(a, b...) static const char *a ## _grp[] = { b }
+#define WPCM450_MKFUNC(nm) { .name = #nm, .ngroups = ARRAY_SIZE(nm ## _grp), \
+ .groups = nm ## _grp }
+struct wpcm450_func {
+ const char *name;
+ const unsigned int ngroups;
+ const char *const *groups;
+};
+
+WPCM450_SFUNC(smb3);
+WPCM450_SFUNC(smb4);
+WPCM450_SFUNC(smb5);
+WPCM450_SFUNC(scs1);
+WPCM450_SFUNC(scs2);
+WPCM450_SFUNC(scs3);
+WPCM450_SFUNC(smb0);
+WPCM450_SFUNC(smb1);
+WPCM450_SFUNC(smb2);
+WPCM450_SFUNC(bsp);
+WPCM450_SFUNC(hsp1);
+WPCM450_SFUNC(hsp2);
+WPCM450_SFUNC(r1err);
+WPCM450_SFUNC(r1md);
+WPCM450_SFUNC(rmii2);
+WPCM450_SFUNC(r2err);
+WPCM450_SFUNC(r2md);
+WPCM450_SFUNC(kbcc);
+WPCM450_SFUNC(clko);
+WPCM450_SFUNC(smi);
+WPCM450_SFUNC(uinc);
+WPCM450_SFUNC(gspi);
+WPCM450_SFUNC(mben);
+WPCM450_SFUNC(xcs2);
+WPCM450_SFUNC(xcs1);
+WPCM450_SFUNC(sdio);
+WPCM450_SFUNC(sspi);
+WPCM450_SFUNC(fi0);
+WPCM450_SFUNC(fi1);
+WPCM450_SFUNC(fi2);
+WPCM450_SFUNC(fi3);
+WPCM450_SFUNC(fi4);
+WPCM450_SFUNC(fi5);
+WPCM450_SFUNC(fi6);
+WPCM450_SFUNC(fi7);
+WPCM450_SFUNC(fi8);
+WPCM450_SFUNC(fi9);
+WPCM450_SFUNC(fi10);
+WPCM450_SFUNC(fi11);
+WPCM450_SFUNC(fi12);
+WPCM450_SFUNC(fi13);
+WPCM450_SFUNC(fi14);
+WPCM450_SFUNC(fi15);
+WPCM450_SFUNC(pwm0);
+WPCM450_SFUNC(pwm1);
+WPCM450_SFUNC(pwm2);
+WPCM450_SFUNC(pwm3);
+WPCM450_SFUNC(pwm4);
+WPCM450_SFUNC(pwm5);
+WPCM450_SFUNC(pwm6);
+WPCM450_SFUNC(pwm7);
+WPCM450_SFUNC(hg0);
+WPCM450_SFUNC(hg1);
+WPCM450_SFUNC(hg2);
+WPCM450_SFUNC(hg3);
+WPCM450_SFUNC(hg4);
+WPCM450_SFUNC(hg5);
+WPCM450_SFUNC(hg6);
+WPCM450_SFUNC(hg7);
+
+#define WPCM450_GRP(x) #x
+WPCM450_FUNC(gpio, WPCM450_GRPS);
+#undef WPCM450_GRP
+
+/* Function names */
+static struct wpcm450_func wpcm450_funcs[] = {
+ WPCM450_MKFUNC(smb3),
+ WPCM450_MKFUNC(smb4),
+ WPCM450_MKFUNC(smb5),
+ WPCM450_MKFUNC(scs1),
+ WPCM450_MKFUNC(scs2),
+ WPCM450_MKFUNC(scs3),
+ WPCM450_MKFUNC(smb0),
+ WPCM450_MKFUNC(smb1),
+ WPCM450_MKFUNC(smb2),
+ WPCM450_MKFUNC(bsp),
+ WPCM450_MKFUNC(hsp1),
+ WPCM450_MKFUNC(hsp2),
+ WPCM450_MKFUNC(r1err),
+ WPCM450_MKFUNC(r1md),
+ WPCM450_MKFUNC(rmii2),
+ WPCM450_MKFUNC(r2err),
+ WPCM450_MKFUNC(r2md),
+ WPCM450_MKFUNC(kbcc),
+ WPCM450_MKFUNC(clko),
+ WPCM450_MKFUNC(smi),
+ WPCM450_MKFUNC(uinc),
+ WPCM450_MKFUNC(gspi),
+ WPCM450_MKFUNC(mben),
+ WPCM450_MKFUNC(xcs2),
+ WPCM450_MKFUNC(xcs1),
+ WPCM450_MKFUNC(sdio),
+ WPCM450_MKFUNC(sspi),
+ WPCM450_MKFUNC(fi0),
+ WPCM450_MKFUNC(fi1),
+ WPCM450_MKFUNC(fi2),
+ WPCM450_MKFUNC(fi3),
+ WPCM450_MKFUNC(fi4),
+ WPCM450_MKFUNC(fi5),
+ WPCM450_MKFUNC(fi6),
+ WPCM450_MKFUNC(fi7),
+ WPCM450_MKFUNC(fi8),
+ WPCM450_MKFUNC(fi9),
+ WPCM450_MKFUNC(fi10),
+ WPCM450_MKFUNC(fi11),
+ WPCM450_MKFUNC(fi12),
+ WPCM450_MKFUNC(fi13),
+ WPCM450_MKFUNC(fi14),
+ WPCM450_MKFUNC(fi15),
+ WPCM450_MKFUNC(pwm0),
+ WPCM450_MKFUNC(pwm1),
+ WPCM450_MKFUNC(pwm2),
+ WPCM450_MKFUNC(pwm3),
+ WPCM450_MKFUNC(pwm4),
+ WPCM450_MKFUNC(pwm5),
+ WPCM450_MKFUNC(pwm6),
+ WPCM450_MKFUNC(pwm7),
+ WPCM450_MKFUNC(hg0),
+ WPCM450_MKFUNC(hg1),
+ WPCM450_MKFUNC(hg2),
+ WPCM450_MKFUNC(hg3),
+ WPCM450_MKFUNC(hg4),
+ WPCM450_MKFUNC(hg5),
+ WPCM450_MKFUNC(hg6),
+ WPCM450_MKFUNC(hg7),
+ WPCM450_MKFUNC(gpio),
+};
+
+#define WPCM450_PINCFG(a, b, c, d, e, f, g) \
+ [a] { .fn0 = fn_ ## b, .reg0 = WPCM450_GCR_ ## c, .bit0 = d, \
+ .fn1 = fn_ ## e, .reg1 = WPCM450_GCR_ ## f, .bit1 = g }
+
+struct wpcm450_pincfg {
+ int fn0, reg0, bit0;
+ int fn1, reg1, bit1;
+};
+
+static const struct wpcm450_pincfg pincfg[] = {
+ /* PIN FUNCTION 1 FUNCTION 2 */
+ WPCM450_PINCFG(0, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(1, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(2, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(3, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(4, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(5, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(6, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(7, none, NONE, 0, sdio, MFSEL1, 30),
+ WPCM450_PINCFG(8, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(9, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(10, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(11, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(12, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
+ WPCM450_PINCFG(13, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
+ WPCM450_PINCFG(14, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
+ WPCM450_PINCFG(15, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
+ WPCM450_PINCFG(16, none, NONE, 0, pwm6, MFSEL2, 22),
+ WPCM450_PINCFG(17, none, NONE, 0, pwm7, MFSEL2, 23),
+ WPCM450_PINCFG(18, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(19, uinc, MFSEL1, 23, none, NONE, 0),
+ WPCM450_PINCFG(20, hg0, MFSEL2, 24, pwm4, MFSEL2, 20),
+ WPCM450_PINCFG(21, hg1, MFSEL2, 25, pwm5, MFSEL2, 21),
+ WPCM450_PINCFG(22, hg2, MFSEL2, 26, none, NONE, 0),
+ WPCM450_PINCFG(23, hg3, MFSEL2, 27, none, NONE, 0),
+ WPCM450_PINCFG(24, hg4, MFSEL2, 28, none, NONE, 0),
+ WPCM450_PINCFG(25, hg5, MFSEL2, 29, none, NONE, 0),
+ WPCM450_PINCFG(26, smb5, MFSEL1, 2, none, NONE, 0),
+ WPCM450_PINCFG(27, smb5, MFSEL1, 2, none, NONE, 0),
+ WPCM450_PINCFG(28, smb4, MFSEL1, 1, none, NONE, 0),
+ WPCM450_PINCFG(29, smb4, MFSEL1, 1, none, NONE, 0),
+ WPCM450_PINCFG(30, smb3, MFSEL1, 0, none, NONE, 0),
+ WPCM450_PINCFG(31, smb3, MFSEL1, 0, none, NONE, 0),
+
+ WPCM450_PINCFG(32, scs1, MFSEL1, 3, none, NONE, 0),
+ WPCM450_PINCFG(33, scs2, MFSEL1, 4, none, NONE, 0),
+ WPCM450_PINCFG(34, scs3, MFSEL1, 5, none, NONE, 0),
+ WPCM450_PINCFG(35, xcs1, MFSEL1, 29, none, NONE, 0),
+ WPCM450_PINCFG(36, xcs2, MFSEL1, 28, none, NONE, 0),
+ WPCM450_PINCFG(37, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(38, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(39, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(40, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(41, bsp, MFSEL1, 9, none, NONE, 0),
+ WPCM450_PINCFG(42, bsp, MFSEL1, 9, none, NONE, 0),
+ WPCM450_PINCFG(43, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
+ WPCM450_PINCFG(44, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
+ WPCM450_PINCFG(45, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
+ WPCM450_PINCFG(46, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
+ WPCM450_PINCFG(47, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
+ WPCM450_PINCFG(48, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(49, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(50, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(51, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(52, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(53, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(54, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(55, hsp2, MFSEL1, 11, none, NONE, 0),
+ WPCM450_PINCFG(56, r1err, MFSEL1, 12, none, NONE, 0),
+ WPCM450_PINCFG(57, r1md, MFSEL1, 13, none, NONE, 0),
+ WPCM450_PINCFG(58, r1md, MFSEL1, 13, none, NONE, 0),
+ WPCM450_PINCFG(59, hg6, MFSEL2, 30, none, NONE, 0),
+ WPCM450_PINCFG(60, hg7, MFSEL2, 31, sdio, MFSEL1, 30),
+ WPCM450_PINCFG(61, hsp1, MFSEL1, 10, none, NONE, 0),
+ WPCM450_PINCFG(62, hsp1, MFSEL1, 10, none, NONE, 0),
+ WPCM450_PINCFG(63, hsp1, MFSEL1, 10, none, NONE, 0),
+
+ WPCM450_PINCFG(64, fi0, MFSEL2, 0, none, NONE, 0),
+ WPCM450_PINCFG(65, fi1, MFSEL2, 1, none, NONE, 0),
+ WPCM450_PINCFG(66, fi2, MFSEL2, 2, none, NONE, 0),
+ WPCM450_PINCFG(67, fi3, MFSEL2, 3, none, NONE, 0),
+ WPCM450_PINCFG(68, fi4, MFSEL2, 4, none, NONE, 0),
+ WPCM450_PINCFG(69, fi5, MFSEL2, 5, none, NONE, 0),
+ WPCM450_PINCFG(70, fi6, MFSEL2, 6, none, NONE, 0),
+ WPCM450_PINCFG(71, fi7, MFSEL2, 7, none, NONE, 0),
+ WPCM450_PINCFG(72, fi8, MFSEL2, 8, none, NONE, 0),
+ WPCM450_PINCFG(73, fi9, MFSEL2, 9, none, NONE, 0),
+ WPCM450_PINCFG(74, fi10, MFSEL2, 10, none, NONE, 0),
+ WPCM450_PINCFG(75, fi11, MFSEL2, 11, none, NONE, 0),
+ WPCM450_PINCFG(76, fi12, MFSEL2, 12, none, NONE, 0),
+ WPCM450_PINCFG(77, fi13, MFSEL2, 13, none, NONE, 0),
+ WPCM450_PINCFG(78, fi14, MFSEL2, 14, none, NONE, 0),
+ WPCM450_PINCFG(79, fi15, MFSEL2, 15, none, NONE, 0),
+ WPCM450_PINCFG(80, pwm0, MFSEL2, 16, none, NONE, 0),
+ WPCM450_PINCFG(81, pwm1, MFSEL2, 17, none, NONE, 0),
+ WPCM450_PINCFG(82, pwm2, MFSEL2, 18, none, NONE, 0),
+ WPCM450_PINCFG(83, pwm3, MFSEL2, 19, none, NONE, 0),
+ WPCM450_PINCFG(84, rmii2, MFSEL1, 14, none, NONE, 0),
+ WPCM450_PINCFG(85, rmii2, MFSEL1, 14, none, NONE, 0),
+ WPCM450_PINCFG(86, rmii2, MFSEL1, 14, none, NONE, 0),
+ WPCM450_PINCFG(87, rmii2, MFSEL1, 14, none, NONE, 0),
+ WPCM450_PINCFG(88, rmii2, MFSEL1, 14, none, NONE, 0),
+ WPCM450_PINCFG(89, rmii2, MFSEL1, 14, none, NONE, 0),
+ WPCM450_PINCFG(90, r2err, MFSEL1, 15, none, NONE, 0),
+ WPCM450_PINCFG(91, r2md, MFSEL1, 16, none, NONE, 0),
+ WPCM450_PINCFG(92, r2md, MFSEL1, 16, none, NONE, 0),
+ WPCM450_PINCFG(93, kbcc, MFSEL1, 17, none, NONE, 0),
+ WPCM450_PINCFG(94, kbcc, MFSEL1, 17, none, NONE, 0),
+ WPCM450_PINCFG(95, none, NONE, 0, none, NONE, 0),
+
+ WPCM450_PINCFG(96, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(97, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(98, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(99, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(100, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(101, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(102, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(103, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(104, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(105, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(106, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(107, none, NONE, 0, none, NONE, 0),
+ WPCM450_PINCFG(108, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(109, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(110, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(111, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(112, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(113, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(114, smb0, MFSEL1, 6, none, NONE, 0),
+ WPCM450_PINCFG(115, smb0, MFSEL1, 6, none, NONE, 0),
+ WPCM450_PINCFG(116, smb1, MFSEL1, 7, none, NONE, 0),
+ WPCM450_PINCFG(117, smb1, MFSEL1, 7, none, NONE, 0),
+ WPCM450_PINCFG(118, smb2, MFSEL1, 8, none, NONE, 0),
+ WPCM450_PINCFG(119, smb2, MFSEL1, 8, none, NONE, 0),
+ WPCM450_PINCFG(120, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(121, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(122, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(123, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(124, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(125, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(126, none, NONE, 0, none, NONE, 0), /* DVO */
+ WPCM450_PINCFG(127, none, NONE, 0, none, NONE, 0), /* DVO */
+};
+
+#define WPCM450_PIN(n) PINCTRL_PIN(n, "gpio" #n)
+
+static const struct pinctrl_pin_desc wpcm450_pins[] = {
+ WPCM450_PIN(0), WPCM450_PIN(1), WPCM450_PIN(2), WPCM450_PIN(3),
+ WPCM450_PIN(4), WPCM450_PIN(5), WPCM450_PIN(6), WPCM450_PIN(7),
+ WPCM450_PIN(8), WPCM450_PIN(9), WPCM450_PIN(10), WPCM450_PIN(11),
+ WPCM450_PIN(12), WPCM450_PIN(13), WPCM450_PIN(14), WPCM450_PIN(15),
+ WPCM450_PIN(16), WPCM450_PIN(17), WPCM450_PIN(18), WPCM450_PIN(19),
+ WPCM450_PIN(20), WPCM450_PIN(21), WPCM450_PIN(22), WPCM450_PIN(23),
+ WPCM450_PIN(24), WPCM450_PIN(25), WPCM450_PIN(26), WPCM450_PIN(27),
+ WPCM450_PIN(28), WPCM450_PIN(29), WPCM450_PIN(30), WPCM450_PIN(31),
+ WPCM450_PIN(32), WPCM450_PIN(33), WPCM450_PIN(34), WPCM450_PIN(35),
+ WPCM450_PIN(36), WPCM450_PIN(37), WPCM450_PIN(38), WPCM450_PIN(39),
+ WPCM450_PIN(40), WPCM450_PIN(41), WPCM450_PIN(42), WPCM450_PIN(43),
+ WPCM450_PIN(44), WPCM450_PIN(45), WPCM450_PIN(46), WPCM450_PIN(47),
+ WPCM450_PIN(48), WPCM450_PIN(49), WPCM450_PIN(50), WPCM450_PIN(51),
+ WPCM450_PIN(52), WPCM450_PIN(53), WPCM450_PIN(54), WPCM450_PIN(55),
+ WPCM450_PIN(56), WPCM450_PIN(57), WPCM450_PIN(58), WPCM450_PIN(59),
+ WPCM450_PIN(60), WPCM450_PIN(61), WPCM450_PIN(62), WPCM450_PIN(63),
+ WPCM450_PIN(64), WPCM450_PIN(65), WPCM450_PIN(66), WPCM450_PIN(67),
+ WPCM450_PIN(68), WPCM450_PIN(69), WPCM450_PIN(70), WPCM450_PIN(71),
+ WPCM450_PIN(72), WPCM450_PIN(73), WPCM450_PIN(74), WPCM450_PIN(75),
+ WPCM450_PIN(76), WPCM450_PIN(77), WPCM450_PIN(78), WPCM450_PIN(79),
+ WPCM450_PIN(80), WPCM450_PIN(81), WPCM450_PIN(82), WPCM450_PIN(83),
+ WPCM450_PIN(84), WPCM450_PIN(85), WPCM450_PIN(86), WPCM450_PIN(87),
+ WPCM450_PIN(88), WPCM450_PIN(89), WPCM450_PIN(90), WPCM450_PIN(91),
+ WPCM450_PIN(92), WPCM450_PIN(93), WPCM450_PIN(94), WPCM450_PIN(95),
+ WPCM450_PIN(96), WPCM450_PIN(97), WPCM450_PIN(98), WPCM450_PIN(99),
+ WPCM450_PIN(100), WPCM450_PIN(101), WPCM450_PIN(102), WPCM450_PIN(103),
+ WPCM450_PIN(104), WPCM450_PIN(105), WPCM450_PIN(106), WPCM450_PIN(107),
+ WPCM450_PIN(108), WPCM450_PIN(109), WPCM450_PIN(110), WPCM450_PIN(111),
+ WPCM450_PIN(112), WPCM450_PIN(113), WPCM450_PIN(114), WPCM450_PIN(115),
+ WPCM450_PIN(116), WPCM450_PIN(117), WPCM450_PIN(118), WPCM450_PIN(119),
+ WPCM450_PIN(120), WPCM450_PIN(121), WPCM450_PIN(122), WPCM450_PIN(123),
+ WPCM450_PIN(124), WPCM450_PIN(125), WPCM450_PIN(126), WPCM450_PIN(127),
+};
+
+/* Enable mode in pin group */
+static void wpcm450_setfunc(struct regmap *gcr_regmap, const unsigned int *pin,
+ int npins, int func)
+{
+ const struct wpcm450_pincfg *cfg;
+ int i;
+
+ for (i = 0; i < npins; i++) {
+ cfg = &pincfg[pin[i]];
+ if (func == fn_gpio || cfg->fn0 == func || cfg->fn1 == func) {
+ if (cfg->reg0)
+ regmap_update_bits(gcr_regmap, cfg->reg0,
+ BIT(cfg->bit0),
+ (cfg->fn0 == func) ? BIT(cfg->bit0) : 0);
+ if (cfg->reg1)
+ regmap_update_bits(gcr_regmap, cfg->reg1,
+ BIT(cfg->bit1),
+ (cfg->fn1 == func) ? BIT(cfg->bit1) : 0);
+ }
+ }
+}
+
+static int wpcm450_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ return ARRAY_SIZE(wpcm450_groups);
+}
+
+static const char *wpcm450_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ return wpcm450_groups[selector].name;
+}
+
+static int wpcm450_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const unsigned int **pins,
+ unsigned int *npins)
+{
+ *npins = wpcm450_groups[selector].num_pins;
+ *pins = wpcm450_groups[selector].pins;
+
+ return 0;
+}
+
+static int wpcm450_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np_config,
+ struct pinctrl_map **map,
+ u32 *num_maps)
+{
+ return pinconf_generic_dt_node_to_map(pctldev, np_config,
+ map, num_maps,
+ PIN_MAP_TYPE_INVALID);
+}
+
+static void wpcm450_dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map, u32 num_maps)
+{
+ kfree(map);
+}
+
+static const struct pinctrl_ops wpcm450_pinctrl_ops = {
+ .get_groups_count = wpcm450_get_groups_count,
+ .get_group_name = wpcm450_get_group_name,
+ .get_group_pins = wpcm450_get_group_pins,
+ .dt_node_to_map = wpcm450_dt_node_to_map,
+ .dt_free_map = wpcm450_dt_free_map,
+};
+
+static int wpcm450_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ return ARRAY_SIZE(wpcm450_funcs);
+}
+
+static const char *wpcm450_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned int function)
+{
+ return wpcm450_funcs[function].name;
+}
+
+static int wpcm450_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned int function,
+ const char * const **groups,
+ unsigned int * const ngroups)
+{
+ *ngroups = wpcm450_funcs[function].ngroups;
+ *groups = wpcm450_funcs[function].groups;
+
+ return 0;
+}
+
+static int wpcm450_pinmux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int function,
+ unsigned int group)
+{
+ struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ wpcm450_setfunc(pctrl->gcr_regmap, wpcm450_groups[group].pins,
+ wpcm450_groups[group].num_pins, function);
+
+ return 0;
+}
+
+static const struct pinmux_ops wpcm450_pinmux_ops = {
+ .get_functions_count = wpcm450_get_functions_count,
+ .get_function_name = wpcm450_get_function_name,
+ .get_function_groups = wpcm450_get_function_groups,
+ .set_mux = wpcm450_pinmux_set_mux,
+};
+
+static int debounce_bitnum(int gpio)
+{
+ if (gpio >= 0 && gpio < 16)
+ return gpio;
+ return -EINVAL;
+}
+
+static int wpcm450_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ unsigned long flags;
+ int bit;
+ u32 reg;
+
+ switch (param) {
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ bit = debounce_bitnum(pin);
+ if (bit < 0)
+ return bit;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ reg = ioread32(pctrl->gpio_base + WPCM450_GPEVDBNC);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ *config = pinconf_to_config_packed(param, !!(reg & BIT(bit)));
+ return 0;
+ default:
+ return -ENOTSUPP;
+ }
+}
+
+static int wpcm450_config_set_one(struct wpcm450_pinctrl *pctrl,
+ unsigned int pin, unsigned long config)
+{
+ enum pin_config_param param = pinconf_to_config_param(config);
+ unsigned long flags;
+ unsigned long reg;
+ int bit;
+ int arg;
+
+ switch (param) {
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ bit = debounce_bitnum(pin);
+ if (bit < 0)
+ return bit;
+
+ arg = pinconf_to_config_argument(config);
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ reg = ioread32(pctrl->gpio_base + WPCM450_GPEVDBNC);
+ __assign_bit(bit, &reg, arg);
+ iowrite32(reg, pctrl->gpio_base + WPCM450_GPEVDBNC);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ return 0;
+ default:
+ return -ENOTSUPP;
+ }
+}
+
+static int wpcm450_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ int ret;
+
+ while (num_configs--) {
+ ret = wpcm450_config_set_one(pctrl, pin, *configs++);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops wpcm450_pinconf_ops = {
+ .is_generic = true,
+ .pin_config_get = wpcm450_config_get,
+ .pin_config_set = wpcm450_config_set,
+};
+
+static struct pinctrl_desc wpcm450_pinctrl_desc = {
+ .name = "wpcm450-pinctrl",
+ .pins = wpcm450_pins,
+ .npins = ARRAY_SIZE(wpcm450_pins),
+ .pctlops = &wpcm450_pinctrl_ops,
+ .pmxops = &wpcm450_pinmux_ops,
+ .confops = &wpcm450_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+static int wpcm450_gpio_set_config(struct gpio_chip *chip,
+ unsigned int offset, unsigned long config)
+{
+ struct wpcm450_gpio *gpio = gpiochip_get_data(chip);
+
+ return wpcm450_config_set_one(gpio->pctrl, offset, config);
+}
+
+static int wpcm450_gpio_add_pin_ranges(struct gpio_chip *chip)
+{
+ struct wpcm450_gpio *gpio = gpiochip_get_data(chip);
+ const struct wpcm450_bank *bank = gpio->bank;
+
+ return gpiochip_add_pin_range(&gpio->gc, dev_name(gpio->pctrl->dev),
+ 0, bank->base, bank->length);
+}
+
+static int wpcm450_gpio_register(struct platform_device *pdev,
+ struct wpcm450_pinctrl *pctrl)
+{
+ struct device *dev = &pdev->dev;
+ struct fwnode_handle *child;
+ int ret;
+
+ pctrl->gpio_base = devm_platform_ioremap_resource(pdev, 0);
+ if (!pctrl->gpio_base)
+ return dev_err_probe(dev, -ENOMEM, "Resource fail for GPIO controller\n");
+
+ device_for_each_child_node(dev, child) {
+ void __iomem *dat = NULL;
+ void __iomem *set = NULL;
+ void __iomem *dirout = NULL;
+ unsigned long flags = 0;
+ const struct wpcm450_bank *bank;
+ struct wpcm450_gpio *gpio;
+ struct gpio_irq_chip *girq;
+ u32 reg;
+ int i;
+
+ if (!fwnode_property_read_bool(child, "gpio-controller"))
+ continue;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret < 0)
+ return ret;
+
+ gpio = &pctrl->gpio_bank[reg];
+ gpio->pctrl = pctrl;
+
+ if (reg > WPCM450_NUM_BANKS)
+ return dev_err_probe(dev, -EINVAL,
+ "GPIO index %d out of range!\n", reg);
+
+ bank = &wpcm450_banks[reg];
+ gpio->bank = bank;
+
+ dat = pctrl->gpio_base + bank->datain;
+ if (bank->dataout) {
+ set = pctrl->gpio_base + bank->dataout;
+ dirout = pctrl->gpio_base + bank->cfg0;
+ } else {
+ flags = BGPIOF_NO_OUTPUT;
+ }
+ ret = bgpio_init(&gpio->gc, dev, 4,
+ dat, set, NULL, dirout, NULL, flags);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "GPIO initialization failed\n");
+
+ gpio->gc.ngpio = bank->length;
+ gpio->gc.set_config = wpcm450_gpio_set_config;
+ gpio->gc.fwnode = child;
+ gpio->gc.add_pin_ranges = wpcm450_gpio_add_pin_ranges;
+
+ gpio->irqc = wpcm450_gpio_irqchip;
+ girq = &gpio->gc.irq;
+ girq->chip = &gpio->irqc;
+ girq->parent_handler = wpcm450_gpio_irqhandler;
+ girq->parents = devm_kcalloc(dev, WPCM450_NUM_GPIO_IRQS,
+ sizeof(*girq->parents), GFP_KERNEL);
+ if (!girq->parents)
+ return -ENOMEM;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_bad_irq;
+
+ girq->num_parents = 0;
+ for (i = 0; i < WPCM450_NUM_GPIO_IRQS; i++) {
+ int irq = fwnode_irq_get(child, i);
+
+ if (irq < 0)
+ break;
+
+ girq->parents[i] = irq;
+ girq->num_parents++;
+ }
+
+ ret = devm_gpiochip_add_data(dev, &gpio->gc, gpio);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to add GPIO chip\n");
+ }
+
+ return 0;
+}
+
+static int wpcm450_pinctrl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct wpcm450_pinctrl *pctrl;
+ int ret;
+
+ pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
+ if (!pctrl)
+ return -ENOMEM;
+
+ pctrl->dev = &pdev->dev;
+ raw_spin_lock_init(&pctrl->lock);
+ dev_set_drvdata(dev, pctrl);
+
+ pctrl->gcr_regmap =
+ syscon_regmap_lookup_by_compatible("nuvoton,wpcm450-gcr");
+ if (IS_ERR(pctrl->gcr_regmap))
+ return dev_err_probe(dev, PTR_ERR(pctrl->gcr_regmap),
+ "Failed to find nuvoton,wpcm450-gcr\n");
+
+ pctrl->pctldev = devm_pinctrl_register(dev,
+ &wpcm450_pinctrl_desc, pctrl);
+ if (IS_ERR(pctrl->pctldev))
+ return dev_err_probe(dev, PTR_ERR(pctrl->pctldev),
+ "Failed to register pinctrl device\n");
+
+ ret = wpcm450_gpio_register(pdev, pctrl);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const struct of_device_id wpcm450_pinctrl_match[] = {
+ { .compatible = "nuvoton,wpcm450-pinctrl" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wpcm450_pinctrl_match);
+
+static struct platform_driver wpcm450_pinctrl_driver = {
+ .probe = wpcm450_pinctrl_probe,
+ .driver = {
+ .name = "wpcm450-pinctrl",
+ .of_match_table = wpcm450_pinctrl_match,
+ },
+};
+module_platform_driver(wpcm450_pinctrl_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Jonathan Neuschäfer <j.neuschaefer@gmx.net>");
+MODULE_DESCRIPTION("Nuvoton WPCM450 Pinctrl and GPIO driver");
--
2.34.1