pinctrl: UniPhier: add UniPhier pinctrl core support
The core support for the pinctrl drivers for all the UniPhier SoCs.
Changes in v2:
- drop vogus THIS_MODULE because this file is always built-in
- drop vogus "include <linux/module.h> because this file is
always built-in
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
new file mode 100644
index 0000000..e1e98b8
--- /dev/null
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __PINCTRL_UNIPHIER_H__
+#define __PINCTRL_UNIPHIER_H__
+
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#define UNIPHIER_PINCTRL_PINMUX_BASE 0x0
+#define UNIPHIER_PINCTRL_LOAD_PINMUX 0x700
+#define UNIPHIER_PINCTRL_DRVCTRL_BASE 0x800
+#define UNIPHIER_PINCTRL_DRV2CTRL_BASE 0x900
+#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0xa00
+#define UNIPHIER_PINCTRL_IECTRL 0xd00
+
+/* input enable control register bit */
+#define UNIPHIER_PIN_IECTRL_SHIFT 0
+#define UNIPHIER_PIN_IECTRL_BITS 8
+#define UNIPHIER_PIN_IECTRL_MASK ((1UL << (UNIPHIER_PIN_IECTRL_BITS)) \
+ - 1)
+
+/* drive strength control register number */
+#define UNIPHIER_PIN_DRVCTRL_SHIFT ((UNIPHIER_PIN_IECTRL_SHIFT) + \
+ (UNIPHIER_PIN_IECTRL_BITS))
+#define UNIPHIER_PIN_DRVCTRL_BITS 9
+#define UNIPHIER_PIN_DRVCTRL_MASK ((1UL << (UNIPHIER_PIN_DRVCTRL_BITS)) \
+ - 1)
+
+/* supported drive strength (mA) */
+#define UNIPHIER_PIN_DRV_STR_SHIFT ((UNIPHIER_PIN_DRVCTRL_SHIFT) + \
+ (UNIPHIER_PIN_DRVCTRL_BITS))
+#define UNIPHIER_PIN_DRV_STR_BITS 3
+#define UNIPHIER_PIN_DRV_STR_MASK ((1UL << (UNIPHIER_PIN_DRV_STR_BITS)) \
+ - 1)
+
+/* pull-up / pull-down register number */
+#define UNIPHIER_PIN_PUPDCTRL_SHIFT ((UNIPHIER_PIN_DRV_STR_SHIFT) + \
+ (UNIPHIER_PIN_DRV_STR_BITS))
+#define UNIPHIER_PIN_PUPDCTRL_BITS 9
+#define UNIPHIER_PIN_PUPDCTRL_MASK ((1UL << (UNIPHIER_PIN_PUPDCTRL_BITS))\
+ - 1)
+
+/* direction of pull register */
+#define UNIPHIER_PIN_PULL_DIR_SHIFT ((UNIPHIER_PIN_PUPDCTRL_SHIFT) + \
+ (UNIPHIER_PIN_PUPDCTRL_BITS))
+#define UNIPHIER_PIN_PULL_DIR_BITS 3
+#define UNIPHIER_PIN_PULL_DIR_MASK ((1UL << (UNIPHIER_PIN_PULL_DIR_BITS))\
+ - 1)
+
+#if UNIPHIER_PIN_PULL_DIR_SHIFT + UNIPHIER_PIN_PULL_DIR_BITS > BITS_PER_LONG
+#error "unable to pack pin attributes."
+#endif
+
+#define UNIPHIER_PIN_IECTRL_NONE (UNIPHIER_PIN_IECTRL_MASK)
+
+/* selectable drive strength */
+enum uniphier_pin_drv_str {
+ UNIPHIER_PIN_DRV_4_8, /* 2 level control: 4/8 mA */
+ UNIPHIER_PIN_DRV_8_12_16_20, /* 4 level control: 8/12/16/20 mA */
+ UNIPHIER_PIN_DRV_FIXED_4, /* fixed to 4mA */
+ UNIPHIER_PIN_DRV_FIXED_5, /* fixed to 5mA */
+ UNIPHIER_PIN_DRV_FIXED_8, /* fixed to 8mA */
+ UNIPHIER_PIN_DRV_NONE, /* no support (input only pin) */
+};
+
+/* direction of pull register (no pin supports bi-directional pull biasing) */
+enum uniphier_pin_pull_dir {
+ UNIPHIER_PIN_PULL_UP, /* pull-up or disabled */
+ UNIPHIER_PIN_PULL_DOWN, /* pull-down or disabled */
+ UNIPHIER_PIN_PULL_UP_FIXED, /* always pull-up */
+ UNIPHIER_PIN_PULL_DOWN_FIXED, /* always pull-down */
+ UNIPHIER_PIN_PULL_NONE, /* no pull register */
+};
+
+#define UNIPHIER_PIN_IECTRL(x) \
+ (((x) & (UNIPHIER_PIN_IECTRL_MASK)) << (UNIPHIER_PIN_IECTRL_SHIFT))
+#define UNIPHIER_PIN_DRVCTRL(x) \
+ (((x) & (UNIPHIER_PIN_DRVCTRL_MASK)) << (UNIPHIER_PIN_DRVCTRL_SHIFT))
+#define UNIPHIER_PIN_DRV_STR(x) \
+ (((x) & (UNIPHIER_PIN_DRV_STR_MASK)) << (UNIPHIER_PIN_DRV_STR_SHIFT))
+#define UNIPHIER_PIN_PUPDCTRL(x) \
+ (((x) & (UNIPHIER_PIN_PUPDCTRL_MASK)) << (UNIPHIER_PIN_PUPDCTRL_SHIFT))
+#define UNIPHIER_PIN_PULL_DIR(x) \
+ (((x) & (UNIPHIER_PIN_PULL_DIR_MASK)) << (UNIPHIER_PIN_PULL_DIR_SHIFT))
+
+#define UNIPHIER_PIN_ATTR_PACKED(iectrl, drvctrl, drv_str, pupdctrl, pull_dir)\
+ (UNIPHIER_PIN_IECTRL(iectrl) | \
+ UNIPHIER_PIN_DRVCTRL(drvctrl) | \
+ UNIPHIER_PIN_DRV_STR(drv_str) | \
+ UNIPHIER_PIN_PUPDCTRL(pupdctrl) | \
+ UNIPHIER_PIN_PULL_DIR(pull_dir))
+
+static inline unsigned int uniphier_pin_get_iectrl(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_IECTRL_SHIFT) &
+ UNIPHIER_PIN_IECTRL_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_drvctrl(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_DRVCTRL_SHIFT) &
+ UNIPHIER_PIN_DRVCTRL_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_drv_str(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_DRV_STR_SHIFT) &
+ UNIPHIER_PIN_DRV_STR_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_pupdctrl(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_PUPDCTRL_SHIFT) &
+ UNIPHIER_PIN_PUPDCTRL_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_pull_dir(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_PULL_DIR_SHIFT) &
+ UNIPHIER_PIN_PULL_DIR_MASK;
+}
+
+enum uniphier_pinmux_gpio_range_type {
+ UNIPHIER_PINMUX_GPIO_RANGE_PORT,
+ UNIPHIER_PINMUX_GPIO_RANGE_IRQ,
+ UNIPHIER_PINMUX_GPIO_RANGE_NONE,
+};
+
+struct uniphier_pinctrl_group {
+ const char *name;
+ const unsigned *pins;
+ unsigned num_pins;
+ const unsigned *muxvals;
+ enum uniphier_pinmux_gpio_range_type range_type;
+};
+
+struct uniphier_pinmux_function {
+ const char *name;
+ const char * const *groups;
+ unsigned num_groups;
+};
+
+struct uniphier_pinctrl_socdata {
+ const struct uniphier_pinctrl_group *groups;
+ int groups_count;
+ const struct uniphier_pinmux_function *functions;
+ int functions_count;
+ unsigned mux_bits;
+ unsigned reg_stride;
+ bool load_pinctrl;
+};
+
+#define UNIPHIER_PINCTRL_PIN(a, b, c, d, e, f, g) \
+{ \
+ .number = a, \
+ .name = b, \
+ .drv_data = (void *)UNIPHIER_PIN_ATTR_PACKED(c, d, e, f, g), \
+}
+
+#define __UNIPHIER_PINCTRL_GROUP(grp, type) \
+ { \
+ .name = #grp, \
+ .pins = grp##_pins, \
+ .num_pins = ARRAY_SIZE(grp##_pins), \
+ .muxvals = grp##_muxvals + \
+ BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) != \
+ ARRAY_SIZE(grp##_muxvals)), \
+ .range_type = type, \
+ }
+
+#define UNIPHIER_PINCTRL_GROUP(grp) \
+ __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_NONE)
+
+#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_PORT(grp) \
+ __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_PORT)
+
+#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_IRQ(grp) \
+ __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_IRQ)
+
+#define UNIPHIER_PINCTRL_GROUP_SINGLE(grp, array, ofst) \
+ { \
+ .name = #grp, \
+ .pins = array##_pins + ofst, \
+ .num_pins = 1, \
+ .muxvals = array##_muxvals + ofst, \
+ }
+
+#define UNIPHIER_PINMUX_FUNCTION(func) \
+ { \
+ .name = #func, \
+ .groups = func##_groups, \
+ .num_groups = ARRAY_SIZE(func##_groups), \
+ }
+
+struct platform_device;
+struct pinctrl_desc;
+
+int uniphier_pinctrl_probe(struct platform_device *pdev,
+ struct pinctrl_desc *desc,
+ struct uniphier_pinctrl_socdata *socdata);
+
+int uniphier_pinctrl_remove(struct platform_device *pdev);
+
+#endif /* __PINCTRL_UNIPHIER_H__ */