--- /dev/null
+/*
+ * Pinctrl for Cirrus Logic Madera codecs
+ *
+ * Copyright 2016-2017 Cirrus Logic
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+#include <linux/mfd/madera/core.h>
+#include <linux/mfd/madera/registers.h>
+
+#include "../pinctrl-utils.h"
+
+#include "pinctrl-madera.h"
+
+/*
+ * Use pin GPIO names for consistency
+ * NOTE: IDs are zero-indexed for coding convenience
+ */
+static const struct pinctrl_pin_desc madera_pins[] = {
+ PINCTRL_PIN(0, "gpio1"),
+ PINCTRL_PIN(1, "gpio2"),
+ PINCTRL_PIN(2, "gpio3"),
+ PINCTRL_PIN(3, "gpio4"),
+ PINCTRL_PIN(4, "gpio5"),
+ PINCTRL_PIN(5, "gpio6"),
+ PINCTRL_PIN(6, "gpio7"),
+ PINCTRL_PIN(7, "gpio8"),
+ PINCTRL_PIN(8, "gpio9"),
+ PINCTRL_PIN(9, "gpio10"),
+ PINCTRL_PIN(10, "gpio11"),
+ PINCTRL_PIN(11, "gpio12"),
+ PINCTRL_PIN(12, "gpio13"),
+ PINCTRL_PIN(13, "gpio14"),
+ PINCTRL_PIN(14, "gpio15"),
+ PINCTRL_PIN(15, "gpio16"),
+ PINCTRL_PIN(16, "gpio17"),
+ PINCTRL_PIN(17, "gpio18"),
+ PINCTRL_PIN(18, "gpio19"),
+ PINCTRL_PIN(19, "gpio20"),
+ PINCTRL_PIN(20, "gpio21"),
+ PINCTRL_PIN(21, "gpio22"),
+ PINCTRL_PIN(22, "gpio23"),
+ PINCTRL_PIN(23, "gpio24"),
+ PINCTRL_PIN(24, "gpio25"),
+ PINCTRL_PIN(25, "gpio26"),
+ PINCTRL_PIN(26, "gpio27"),
+ PINCTRL_PIN(27, "gpio28"),
+ PINCTRL_PIN(28, "gpio29"),
+ PINCTRL_PIN(29, "gpio30"),
+ PINCTRL_PIN(30, "gpio31"),
+ PINCTRL_PIN(31, "gpio32"),
+ PINCTRL_PIN(32, "gpio33"),
+ PINCTRL_PIN(33, "gpio34"),
+ PINCTRL_PIN(34, "gpio35"),
+ PINCTRL_PIN(35, "gpio36"),
+ PINCTRL_PIN(36, "gpio37"),
+ PINCTRL_PIN(37, "gpio38"),
+ PINCTRL_PIN(38, "gpio39"),
+ PINCTRL_PIN(39, "gpio40"),
+};
+
+/*
+ * All single-pin functions can be mapped to any GPIO, however pinmux applies
+ * functions to pin groups and only those groups declared as supporting that
+ * function. To make this work we must put each pin in its own dummy group so
+ * that the functions can be described as applying to all pins.
+ * Since these do not correspond to anything in the actual hardware - they are
+ * merely an adaptation to pinctrl's view of the world - we use the same name
+ * as the pin to avoid confusion when comparing with datasheet instructions
+ */
+static const char * const madera_pin_single_group_names[] = {
+ "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7",
+ "gpio8", "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14",
+ "gpio15", "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21",
+ "gpio22", "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28",
+ "gpio29", "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35",
+ "gpio36", "gpio37", "gpio38", "gpio39", "gpio40",
+};
+
+/* set of pin numbers for single-pin groups, zero-indexed */
+static const unsigned int madera_pin_single_group_pins[] = {
+ 0, 1, 2, 3, 4, 5, 6,
+ 7, 8, 9, 10, 11, 12, 13,
+ 14, 15, 16, 17, 18, 19, 20,
+ 21, 22, 23, 24, 25, 26, 27,
+ 28, 29, 30, 31, 32, 33, 34,
+ 35, 36, 37, 38, 39,
+};
+
+static const char * const madera_aif1_group_names[] = { "aif1" };
+static const char * const madera_aif2_group_names[] = { "aif2" };
+static const char * const madera_aif3_group_names[] = { "aif3" };
+static const char * const madera_aif4_group_names[] = { "aif4" };
+static const char * const madera_mif1_group_names[] = { "mif1" };
+static const char * const madera_mif2_group_names[] = { "mif2" };
+static const char * const madera_mif3_group_names[] = { "mif3" };
+static const char * const madera_dmic3_group_names[] = { "dmic3" };
+static const char * const madera_dmic4_group_names[] = { "dmic4" };
+static const char * const madera_dmic5_group_names[] = { "dmic5" };
+static const char * const madera_dmic6_group_names[] = { "dmic6" };
+static const char * const madera_spk1_group_names[] = { "pdmspk1" };
+static const char * const madera_spk2_group_names[] = { "pdmspk2" };
+
+/*
+ * alt-functions always apply to a single pin group, other functions always
+ * apply to all pins
+ */
+static const struct {
+ const char *name;
+ const char * const *group_names;
+ u32 func;
+} madera_mux_funcs[] = {
+ {
+ .name = "aif1",
+ .group_names = madera_aif1_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "aif2",
+ .group_names = madera_aif2_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "aif3",
+ .group_names = madera_aif3_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "aif4",
+ .group_names = madera_aif4_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "mif1",
+ .group_names = madera_mif1_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "mif2",
+ .group_names = madera_mif2_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "mif3",
+ .group_names = madera_mif3_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "dmic3",
+ .group_names = madera_dmic3_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "dmic4",
+ .group_names = madera_dmic4_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "dmic5",
+ .group_names = madera_dmic5_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "dmic6",
+ .group_names = madera_dmic6_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "pdmspk1",
+ .group_names = madera_spk1_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "pdmspk2",
+ .group_names = madera_spk2_group_names,
+ .func = 0x000
+ },
+ {
+ .name = "io",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x001
+ },
+ {
+ .name = "dsp-gpio",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x002
+ },
+ {
+ .name = "irq1",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x003
+ },
+ {
+ .name = "irq2",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x004
+ },
+ {
+ .name = "fll1-clk",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x010
+ },
+ {
+ .name = "fll2-clk",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x011
+ },
+ {
+ .name = "fll3-clk",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x012
+ },
+ {
+ .name = "fllao-clk",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x013
+ },
+ {
+ .name = "fll1-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x018
+ },
+ {
+ .name = "fll2-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x019
+ },
+ {
+ .name = "fll3-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x01a
+ },
+ {
+ .name = "fllao-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x01b
+ },
+ {
+ .name = "opclk",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x040
+ },
+ {
+ .name = "opclk-async",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x041
+ },
+ {
+ .name = "pwm1",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x048
+ },
+ {
+ .name = "pwm2",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x049
+ },
+ {
+ .name = "spdif",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x04c
+ },
+ {
+ .name = "asrc1-in1-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x088
+ },
+ {
+ .name = "asrc1-in2-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x089
+ },
+ {
+ .name = "asrc2-in1-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x08a
+ },
+ {
+ .name = "asrc2-in2-lock",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x08b
+ },
+ {
+ .name = "spkl-short-circuit",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x0b6
+ },
+ {
+ .name = "spkr-short-circuit",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x0b7
+ },
+ {
+ .name = "spk-shutdown",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x0e0
+ },
+ {
+ .name = "spk-overheat-shutdown",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x0e1
+ },
+ {
+ .name = "spk-overheat-warn",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x0e2
+ },
+ {
+ .name = "timer1-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x140
+ },
+ {
+ .name = "timer2-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x141
+ },
+ {
+ .name = "timer3-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x142
+ },
+ {
+ .name = "timer4-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x143
+ },
+ {
+ .name = "timer5-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x144
+ },
+ {
+ .name = "timer6-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x145
+ },
+ {
+ .name = "timer7-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x146
+ },
+ {
+ .name = "timer8-sts",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x147
+ },
+ {
+ .name = "log1-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x150
+ },
+ {
+ .name = "log2-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x151
+ },
+ {
+ .name = "log3-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x152
+ },
+ {
+ .name = "log4-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x153
+ },
+ {
+ .name = "log5-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x154
+ },
+ {
+ .name = "log6-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x155
+ },
+ {
+ .name = "log7-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x156
+ },
+ {
+ .name = "log8-fifo-ne",
+ .group_names = madera_pin_single_group_names,
+ .func = 0x157
+ },
+};
+
+static u16 madera_pin_make_drv_str(struct madera_pin_private *priv,
+ unsigned int milliamps)
+{
+ switch (milliamps) {
+ case 4:
+ return 0;
+ case 8:
+ return 2 << MADERA_GP1_DRV_STR_SHIFT;
+ default:
+ break;
+ }
+
+ dev_warn(priv->dev, "%u mA not a valid drive strength", milliamps);
+
+ return 0;
+}
+
+static unsigned int madera_pin_unmake_drv_str(struct madera_pin_private *priv,
+ u16 regval)
+{
+ regval = (regval & MADERA_GP1_DRV_STR_MASK) >> MADERA_GP1_DRV_STR_SHIFT;
+
+ switch (regval) {
+ case 0:
+ return 4;
+ case 2:
+ return 8;
+ default:
+ return 0;
+ }
+}
+
+static int madera_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ /* Number of alt function groups plus number of single-pin groups */
+ return priv->chip->n_pin_groups + priv->chip->n_pins;
+}
+
+static const char *madera_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ if (selector < priv->chip->n_pin_groups) {
+ return priv->chip->pin_groups[selector].name;
+ } else {
+ selector -= priv->chip->n_pin_groups;
+ return madera_pin_single_group_names[selector];
+ }
+}
+
+static int madera_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const unsigned int **pins,
+ unsigned int *num_pins)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ if (selector < priv->chip->n_pin_groups) {
+ *pins = priv->chip->pin_groups[selector].pins;
+ *num_pins = priv->chip->pin_groups[selector].n_pins;
+ } else {
+ /* return the dummy group for a single pin */
+ selector -= priv->chip->n_pin_groups;
+ *pins = &madera_pin_single_group_pins[selector];
+ *num_pins = 1;
+ }
+ return 0;
+}
+
+static void madera_pin_dbg_show_fn(struct madera_pin_private *priv,
+ struct seq_file *s,
+ unsigned int pin, unsigned int fn)
+{
+ const struct madera_pin_chip *chip = priv->chip;
+ int i, g_pin;
+
+ if (fn != 0) {
+ for (i = 0; i < ARRAY_SIZE(madera_mux_funcs); ++i) {
+ if (madera_mux_funcs[i].func == fn) {
+ seq_printf(s, " FN=%s",
+ madera_mux_funcs[i].name);
+ return;
+ }
+ }
+ return; /* ignore unknown function values */
+ }
+
+ /* alt function */
+ for (i = 0; i < chip->n_pin_groups; ++i) {
+ for (g_pin = 0; g_pin < chip->pin_groups[i].n_pins; ++g_pin) {
+ if (chip->pin_groups[i].pins[g_pin] == pin) {
+ seq_printf(s, " FN=%s",
+ chip->pin_groups[i].name);
+ return;
+ }
+ }
+ }
+}
+
+static void madera_pin_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s,
+ unsigned int pin)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int conf[2];
+ unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin);
+ unsigned int fn;
+ int ret;
+
+ ret = regmap_read(priv->madera->regmap, reg, &conf[0]);
+ if (ret)
+ return;
+
+ ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]);
+ if (ret)
+ return;
+
+ seq_printf(s, "%04x:%04x", conf[0], conf[1]);
+
+ fn = (conf[0] & MADERA_GP1_FN_MASK) >> MADERA_GP1_FN_SHIFT;
+ madera_pin_dbg_show_fn(priv, s, pin, fn);
+
+ /* State of direction bit is only relevant if function==1 */
+ if (fn == 1) {
+ if (conf[1] & MADERA_GP1_DIR_MASK)
+ seq_puts(s, " IN");
+ else
+ seq_puts(s, " OUT");
+ }
+
+ if (conf[1] & MADERA_GP1_PU_MASK)
+ seq_puts(s, " PU");
+
+ if (conf[1] & MADERA_GP1_PD_MASK)
+ seq_puts(s, " PD");
+
+ if (conf[0] & MADERA_GP1_DB_MASK)
+ seq_puts(s, " DB");
+
+ if (conf[0] & MADERA_GP1_OP_CFG_MASK)
+ seq_puts(s, " OD");
+ else
+ seq_puts(s, " CMOS");
+
+ seq_printf(s, " DRV=%umA", madera_pin_unmake_drv_str(priv, conf[1]));
+
+ if (conf[0] & MADERA_GP1_IP_CFG_MASK)
+ seq_puts(s, "SCHMITT");
+}
+
+static const struct pinctrl_ops madera_pin_group_ops = {
+ .get_groups_count = madera_get_groups_count,
+ .get_group_name = madera_get_group_name,
+ .get_group_pins = madera_get_group_pins,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_all,
+ .dt_free_map = pinctrl_utils_free_map,
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+ .pin_dbg_show = madera_pin_dbg_show,
+#endif
+};
+
+static int madera_mux_get_funcs_count(struct pinctrl_dev *pctldev)
+{
+ return ARRAY_SIZE(madera_mux_funcs);
+}
+
+static const char *madera_mux_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ return madera_mux_funcs[selector].name;
+}
+
+static int madera_mux_get_groups(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const char * const **groups,
+ unsigned int * const num_groups)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = madera_mux_funcs[selector].group_names;
+
+ if (madera_mux_funcs[selector].func == 0) {
+ /* alt func always maps to a single group */
+ *num_groups = 1;
+ } else {
+ /* other funcs map to all available gpio pins */
+ *num_groups = priv->chip->n_pins;
+ }
+
+ return 0;
+}
+
+static int madera_mux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ unsigned int group)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ struct madera *madera = priv->madera;
+ const struct madera_pin_groups *pin_group = priv->chip->pin_groups;
+ unsigned int n_chip_groups = priv->chip->n_pin_groups;
+ const char *func_name = madera_mux_funcs[selector].name;
+ unsigned int reg;
+ int i, ret;
+
+ dev_dbg(priv->dev, "%s selecting %u (%s) for group %u (%s)\n",
+ __func__, selector, func_name, group,
+ madera_get_group_name(pctldev, group));
+
+ if (madera_mux_funcs[selector].func == 0) {
+ /* alt func pin assignments are codec-specific */
+ for (i = 0; i < n_chip_groups; ++i) {
+ if (strcmp(func_name, pin_group->name) == 0)
+ break;
+
+ ++pin_group;
+ }
+
+ if (i == n_chip_groups)
+ return -EINVAL;
+
+ for (i = 0; i < pin_group->n_pins; ++i) {
+ reg = MADERA_GPIO1_CTRL_1 + (2 * pin_group->pins[i]);
+
+ dev_dbg(priv->dev, "%s setting 0x%x func bits to 0\n",
+ __func__, reg);
+
+ ret = regmap_update_bits(madera->regmap, reg,
+ MADERA_GP1_FN_MASK, 0);
+ if (ret)
+ break;
+
+ }
+ } else {
+ /*
+ * for other funcs the group will be the gpio number and will
+ * be offset by the number of chip-specific functions at the
+ * start of the group list
+ */
+ group -= n_chip_groups;
+ reg = MADERA_GPIO1_CTRL_1 + (2 * group);
+
+ dev_dbg(priv->dev, "%s setting 0x%x func bits to 0x%x\n",
+ __func__, reg, madera_mux_funcs[selector].func);
+
+ ret = regmap_update_bits(madera->regmap,
+ reg,
+ MADERA_GP1_FN_MASK,
+ madera_mux_funcs[selector].func);
+ }
+
+ if (ret)
+ dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
+
+ return ret;
+}
+
+static int madera_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset,
+ bool input)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ struct madera *madera = priv->madera;
+ unsigned int reg = MADERA_GPIO1_CTRL_2 + (2 * offset);
+ unsigned int val;
+ int ret;
+
+ if (input)
+ val = MADERA_GP1_DIR;
+ else
+ val = 0;
+
+ ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_DIR_MASK, val);
+ if (ret)
+ dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
+
+ return ret;
+}
+
+static int madera_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ struct madera *madera = priv->madera;
+ unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset);
+ int ret;
+
+ /* put the pin into GPIO mode */
+ ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1);
+ if (ret)
+ dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
+
+ return ret;
+}
+
+static void madera_gpio_disable_free(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ struct madera *madera = priv->madera;
+ unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset);
+ int ret;
+
+ /* disable GPIO by setting to GPIO IN */
+ madera_gpio_set_direction(pctldev, range, offset, true);
+
+ ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1);
+ if (ret)
+ dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
+}
+
+static const struct pinmux_ops madera_pin_mux_ops = {
+ .get_functions_count = madera_mux_get_funcs_count,
+ .get_function_name = madera_mux_get_func_name,
+ .get_function_groups = madera_mux_get_groups,
+ .set_mux = madera_mux_set_mux,
+ .gpio_request_enable = madera_gpio_request_enable,
+ .gpio_disable_free = madera_gpio_disable_free,
+ .gpio_set_direction = madera_gpio_set_direction,
+ .strict = true, /* GPIO and other functions are exclusive */
+};
+
+static int madera_pin_conf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int param = pinconf_to_config_param(*config);
+ unsigned int result = 0;
+ unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin);
+ unsigned int conf[2];
+ int ret;
+
+ ret = regmap_read(priv->madera->regmap, reg, &conf[0]);
+ if (!ret)
+ ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]);
+
+ if (ret) {
+ dev_err(priv->dev, "Failed to read GP%d conf (%d)\n",
+ pin + 1, ret);
+ return ret;
+ }
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_BUS_HOLD:
+ conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ if (conf[1] == (MADERA_GP1_PU | MADERA_GP1_PD))
+ result = 1;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ if (!conf[1])
+ result = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ if (conf[1] == MADERA_GP1_PD_MASK)
+ result = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ if (conf[1] == MADERA_GP1_PU_MASK)
+ result = 1;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ if (conf[0] & MADERA_GP1_OP_CFG_MASK)
+ result = 1;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ if (!(conf[0] & MADERA_GP1_OP_CFG_MASK))
+ result = 1;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ result = madera_pin_unmake_drv_str(priv, conf[1]);
+ break;
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ if (conf[0] & MADERA_GP1_DB_MASK)
+ result = 1;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ if (conf[0] & MADERA_GP1_DIR_MASK)
+ result = 1;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT:
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ if (conf[0] & MADERA_GP1_IP_CFG_MASK)
+ result = 1;
+ break;
+ case PIN_CONFIG_OUTPUT:
+ if ((conf[1] & MADERA_GP1_DIR_MASK) &&
+ (conf[0] & MADERA_GP1_LVL_MASK))
+ result = 1;
+ break;
+ default:
+ break;
+ }
+
+ *config = pinconf_to_config_packed(param, result);
+
+ return 0;
+}
+
+static int madera_pin_conf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ u16 conf[2] = {0, 0};
+ u16 mask[2] = {0, 0};
+ unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin);
+ unsigned int val;
+ int ret;
+
+ while (num_configs) {
+ dev_dbg(priv->dev, "%s config 0x%lx\n", __func__, *configs);
+
+ switch (pinconf_to_config_param(*configs)) {
+ case PIN_CONFIG_BIAS_BUS_HOLD:
+ mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ conf[1] |= MADERA_GP1_PU | MADERA_GP1_PD;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ conf[1] &= ~(MADERA_GP1_PU | MADERA_GP1_PD);
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ conf[1] |= MADERA_GP1_PD;
+ conf[1] &= ~MADERA_GP1_PU;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
+ conf[1] |= MADERA_GP1_PU;
+ conf[1] &= ~MADERA_GP1_PD;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ mask[0] |= MADERA_GP1_OP_CFG_MASK;
+ conf[0] |= MADERA_GP1_OP_CFG;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ mask[0] |= MADERA_GP1_OP_CFG_MASK;
+ conf[0] &= ~MADERA_GP1_OP_CFG;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ val = pinconf_to_config_argument(*configs);
+ mask[1] |= MADERA_GP1_DRV_STR_MASK;
+ conf[1] &= ~MADERA_GP1_DRV_STR_MASK;
+ conf[1] |= madera_pin_make_drv_str(priv, val);
+ break;
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ mask[0] |= MADERA_GP1_DB_MASK;
+
+ /*
+ * we can't configure debounce time per-pin so value
+ * is just a flag
+ */
+ val = pinconf_to_config_argument(*configs);
+ if (val)
+ conf[0] |= MADERA_GP1_DB;
+ else
+ conf[0] &= ~MADERA_GP1_DB;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ val = pinconf_to_config_argument(*configs);
+ mask[1] |= MADERA_GP1_DIR_MASK;
+ if (val)
+ conf[1] |= MADERA_GP1_DIR;
+ else
+ conf[1] &= ~MADERA_GP1_DIR;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT:
+ val = pinconf_to_config_argument(*configs);
+ mask[0] |= MADERA_GP1_IP_CFG;
+ if (val)
+ conf[0] |= MADERA_GP1_IP_CFG;
+ else
+ conf[0] &= ~MADERA_GP1_IP_CFG;
+
+ mask[1] |= MADERA_GP1_DIR_MASK;
+ conf[1] |= MADERA_GP1_DIR;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask[0] |= MADERA_GP1_IP_CFG;
+ conf[0] |= MADERA_GP1_IP_CFG;
+ mask[1] |= MADERA_GP1_DIR_MASK;
+ conf[1] |= MADERA_GP1_DIR;
+ break;
+ case PIN_CONFIG_OUTPUT:
+ val = pinconf_to_config_argument(*configs);
+ mask[0] |= MADERA_GP1_LVL_MASK;
+ if (val)
+ conf[0] |= MADERA_GP1_LVL;
+ else
+ conf[0] &= ~MADERA_GP1_LVL;
+
+ mask[1] |= MADERA_GP1_DIR_MASK;
+ conf[1] &= ~MADERA_GP1_DIR;
+ break;
+ default:
+ break;
+ }
+
+ ++configs;
+ --num_configs;
+ }
+
+ dev_dbg(priv->dev,
+ "%s gpio%d 0x%x:0x%x 0x%x:0x%x\n",
+ __func__, pin + 1, reg, conf[0], reg + 1, conf[1]);
+
+ ret = regmap_update_bits(priv->madera->regmap, reg, mask[0], conf[0]);
+ if (ret)
+ goto err;
+
+ ++reg;
+ ret = regmap_update_bits(priv->madera->regmap, reg, mask[1], conf[1]);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ dev_err(priv->dev,
+ "Failed to write GPIO%d conf (%d) reg 0x%x\n",
+ pin + 1, ret, reg);
+
+ return ret;
+}
+
+static int madera_pin_conf_group_set(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ unsigned long *configs,
+ unsigned int num_configs)
+{
+ struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
+ const struct madera_pin_groups *pin_group;
+ unsigned int n_groups = priv->chip->n_pin_groups;
+ int i, ret;
+
+ dev_dbg(priv->dev, "%s setting group %s\n", __func__,
+ madera_get_group_name(pctldev, selector));
+
+ if (selector >= n_groups) {
+ /* group is a single pin, convert to pin number and set */
+ return madera_pin_conf_set(pctldev,
+ selector - n_groups,
+ configs,
+ num_configs);
+ } else {
+ pin_group = &priv->chip->pin_groups[selector];
+
+ for (i = 0; i < pin_group->n_pins; ++i) {
+ ret = madera_pin_conf_set(pctldev,
+ pin_group->pins[i],
+ configs,
+ num_configs);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops madera_pin_conf_ops = {
+ .pin_config_get = madera_pin_conf_get,
+ .pin_config_set = madera_pin_conf_set,
+ .pin_config_group_set = madera_pin_conf_group_set,
+
+};
+
+static struct pinctrl_desc madera_pin_desc = {
+ .name = "madera-pinctrl",
+ .pins = madera_pins,
+ .pctlops = &madera_pin_group_ops,
+ .pmxops = &madera_pin_mux_ops,
+ .confops = &madera_pin_conf_ops,
+ .owner = THIS_MODULE,
+};
+
+static int madera_pin_probe(struct platform_device *pdev)
+{
+ struct madera *madera = dev_get_drvdata(pdev->dev.parent);
+ const struct madera_pdata *pdata = dev_get_platdata(madera->dev);
+ struct madera_pin_private *priv;
+ int ret;
+
+ BUILD_BUG_ON(ARRAY_SIZE(madera_pin_single_group_names) !=
+ ARRAY_SIZE(madera_pin_single_group_pins));
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = &pdev->dev;
+ priv->madera = madera;
+ pdev->dev.of_node = madera->dev->of_node;
+
+ switch (madera->type) {
+ case CS47L35:
+ if (IS_ENABLED(CONFIG_PINCTRL_CS47L35))
+ priv->chip = &cs47l35_pin_chip;
+ break;
+ case CS47L85:
+ case WM1840:
+ if (IS_ENABLED(CONFIG_PINCTRL_CS47L85))
+ priv->chip = &cs47l85_pin_chip;
+ break;
+ case CS47L90:
+ case CS47L91:
+ if (IS_ENABLED(CONFIG_PINCTRL_CS47L90))
+ priv->chip = &cs47l90_pin_chip;
+ break;
+ default:
+ break;
+ }
+
+ if (!priv->chip)
+ return -ENODEV;
+
+ madera_pin_desc.npins = priv->chip->n_pins;
+
+ priv->pctl = devm_pinctrl_register(&pdev->dev, &madera_pin_desc, priv);
+ if (IS_ERR(priv->pctl)) {
+ ret = PTR_ERR(priv->pctl);
+ dev_err(priv->dev, "Failed pinctrl register (%d)\n", ret);
+ return ret;
+ }
+
+ /* if the configuration is provided through pdata, apply it */
+ if (pdata) {
+ ret = pinctrl_register_mappings(pdata->gpio_configs,
+ pdata->n_gpio_configs);
+ if (ret) {
+ dev_err(priv->dev,
+ "Failed to register pdata mappings (%d)\n",
+ ret);
+ return ret;
+ }
+ }
+
+ dev_dbg(priv->dev, "pinctrl registered\n");
+
+ return 0;
+}
+
+static struct platform_driver madera_pin_driver = {
+ .probe = madera_pin_probe,
+ .driver = {
+ .name = "madera-pinctrl",
+ },
+};
+
+module_platform_driver(madera_pin_driver);
+
+MODULE_DESCRIPTION("Madera pinctrl driver");
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL v2");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff