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authorLinus Walleij <linus.walleij@linaro.org>2018-12-14 22:51:05 +0100
committerLinus Walleij <linus.walleij@linaro.org>2018-12-14 22:51:05 +0100
commit3e42f200c195fd3a39142028194b67ffaf2b5f6d (patch)
treecad3740cc040f5a5482bcddf7b2d6e12e5947a44 /drivers/gpio
parentc5510b8dafce5f3f5a039c9b262ebcae0092c462 (diff)
parentb76574300504e56e2878ade185d5f47893512d25 (diff)
downloadlinux-3e42f200c195fd3a39142028194b67ffaf2b5f6d.tar.bz2
Merge branch 'ib-pca953x' into devel
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-pca953x.c484
1 files changed, 302 insertions, 182 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 023a32cfac42..905dc1916883 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_data/pca953x.h>
+#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
@@ -30,6 +31,8 @@
#define PCA953X_INVERT 0x02
#define PCA953X_DIRECTION 0x03
+#define REG_ADDR_MASK 0x3f
+#define REG_ADDR_EXT 0x40
#define REG_ADDR_AI 0x80
#define PCA957X_IN 0x00
@@ -58,7 +61,7 @@
#define PCA_GPIO_MASK 0x00FF
#define PCAL_GPIO_MASK 0x1f
-#define PCAL_PINCTRL_MASK 0xe0
+#define PCAL_PINCTRL_MASK 0x60
#define PCA_INT 0x0100
#define PCA_PCAL 0x0200
@@ -119,25 +122,27 @@ struct pca953x_reg_config {
int direction;
int output;
int input;
+ int invert;
};
static const struct pca953x_reg_config pca953x_regs = {
.direction = PCA953X_DIRECTION,
.output = PCA953X_OUTPUT,
.input = PCA953X_INPUT,
+ .invert = PCA953X_INVERT,
};
static const struct pca953x_reg_config pca957x_regs = {
.direction = PCA957X_CFG,
.output = PCA957X_OUT,
.input = PCA957X_IN,
+ .invert = PCA957X_INVRT,
};
struct pca953x_chip {
unsigned gpio_start;
- u8 reg_output[MAX_BANK];
- u8 reg_direction[MAX_BANK];
struct mutex i2c_lock;
+ struct regmap *regmap;
#ifdef CONFIG_GPIO_PCA953X_IRQ
struct mutex irq_lock;
@@ -154,87 +159,177 @@ struct pca953x_chip {
struct regulator *regulator;
const struct pca953x_reg_config *regs;
-
- int (*write_regs)(struct pca953x_chip *, int, u8 *);
- int (*read_regs)(struct pca953x_chip *, int, u8 *);
};
-static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val,
- int off)
+static int pca953x_bank_shift(struct pca953x_chip *chip)
{
- int ret;
- int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
- int offset = off / BANK_SZ;
+ return fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
+}
- ret = i2c_smbus_read_byte_data(chip->client,
- (reg << bank_shift) + offset);
- *val = ret;
+#define PCA953x_BANK_INPUT BIT(0)
+#define PCA953x_BANK_OUTPUT BIT(1)
+#define PCA953x_BANK_POLARITY BIT(2)
+#define PCA953x_BANK_CONFIG BIT(3)
- if (ret < 0) {
- dev_err(&chip->client->dev, "failed reading register\n");
- return ret;
+#define PCA957x_BANK_INPUT BIT(0)
+#define PCA957x_BANK_POLARITY BIT(1)
+#define PCA957x_BANK_BUSHOLD BIT(2)
+#define PCA957x_BANK_CONFIG BIT(4)
+#define PCA957x_BANK_OUTPUT BIT(5)
+
+#define PCAL9xxx_BANK_IN_LATCH BIT(8 + 2)
+#define PCAL9xxx_BANK_IRQ_MASK BIT(8 + 5)
+#define PCAL9xxx_BANK_IRQ_STAT BIT(8 + 6)
+
+/*
+ * We care about the following registers:
+ * - Standard set, below 0x40, each port can be replicated up to 8 times
+ * - PCA953x standard
+ * Input port 0x00 + 0 * bank_size R
+ * Output port 0x00 + 1 * bank_size RW
+ * Polarity Inversion port 0x00 + 2 * bank_size RW
+ * Configuration port 0x00 + 3 * bank_size RW
+ * - PCA957x with mixed up registers
+ * Input port 0x00 + 0 * bank_size R
+ * Polarity Inversion port 0x00 + 1 * bank_size RW
+ * Bus hold port 0x00 + 2 * bank_size RW
+ * Configuration port 0x00 + 4 * bank_size RW
+ * Output port 0x00 + 5 * bank_size RW
+ *
+ * - Extended set, above 0x40, often chip specific.
+ * - PCAL6524/PCAL9555A with custom PCAL IRQ handling:
+ * Input latch register 0x40 + 2 * bank_size RW
+ * Interrupt mask register 0x40 + 5 * bank_size RW
+ * Interrupt status register 0x40 + 6 * bank_size R
+ *
+ * - Registers with bit 0x80 set, the AI bit
+ * The bit is cleared and the registers fall into one of the
+ * categories above.
+ */
+
+static bool pca953x_check_register(struct pca953x_chip *chip, unsigned int reg,
+ u32 checkbank)
+{
+ int bank_shift = pca953x_bank_shift(chip);
+ int bank = (reg & REG_ADDR_MASK) >> bank_shift;
+ int offset = reg & (BIT(bank_shift) - 1);
+
+ /* Special PCAL extended register check. */
+ if (reg & REG_ADDR_EXT) {
+ if (!(chip->driver_data & PCA_PCAL))
+ return false;
+ bank += 8;
}
- return 0;
+ /* Register is not in the matching bank. */
+ if (!(BIT(bank) & checkbank))
+ return false;
+
+ /* Register is not within allowed range of bank. */
+ if (offset >= NBANK(chip))
+ return false;
+
+ return true;
}
-static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val,
- int off)
+static bool pca953x_readable_register(struct device *dev, unsigned int reg)
{
- int ret;
- int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
- int offset = off / BANK_SZ;
+ struct pca953x_chip *chip = dev_get_drvdata(dev);
+ u32 bank;
- ret = i2c_smbus_write_byte_data(chip->client,
- (reg << bank_shift) + offset, val);
+ if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
+ bank = PCA953x_BANK_INPUT | PCA953x_BANK_OUTPUT |
+ PCA953x_BANK_POLARITY | PCA953x_BANK_CONFIG;
+ } else {
+ bank = PCA957x_BANK_INPUT | PCA957x_BANK_OUTPUT |
+ PCA957x_BANK_POLARITY | PCA957x_BANK_CONFIG |
+ PCA957x_BANK_BUSHOLD;
+ }
- if (ret < 0) {
- dev_err(&chip->client->dev, "failed writing register\n");
- return ret;
+ if (chip->driver_data & PCA_PCAL) {
+ bank |= PCAL9xxx_BANK_IN_LATCH | PCAL9xxx_BANK_IRQ_MASK |
+ PCAL9xxx_BANK_IRQ_STAT;
}
- return 0;
+ return pca953x_check_register(chip, reg, bank);
}
-static int pca953x_write_regs_8(struct pca953x_chip *chip, int reg, u8 *val)
+static bool pca953x_writeable_register(struct device *dev, unsigned int reg)
{
- return i2c_smbus_write_byte_data(chip->client, reg, *val);
-}
+ struct pca953x_chip *chip = dev_get_drvdata(dev);
+ u32 bank;
-static int pca953x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
-{
- u16 word = get_unaligned((u16 *)val);
+ if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
+ bank = PCA953x_BANK_OUTPUT | PCA953x_BANK_POLARITY |
+ PCA953x_BANK_CONFIG;
+ } else {
+ bank = PCA957x_BANK_OUTPUT | PCA957x_BANK_POLARITY |
+ PCA957x_BANK_CONFIG | PCA957x_BANK_BUSHOLD;
+ }
- return i2c_smbus_write_word_data(chip->client, reg << 1, word);
+ if (chip->driver_data & PCA_PCAL)
+ bank |= PCAL9xxx_BANK_IN_LATCH | PCAL9xxx_BANK_IRQ_MASK;
+
+ return pca953x_check_register(chip, reg, bank);
}
-static int pca957x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
+static bool pca953x_volatile_register(struct device *dev, unsigned int reg)
{
- int ret;
+ struct pca953x_chip *chip = dev_get_drvdata(dev);
+ u32 bank;
- ret = i2c_smbus_write_byte_data(chip->client, reg << 1, val[0]);
- if (ret < 0)
- return ret;
+ if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
+ bank = PCA953x_BANK_INPUT;
+ else
+ bank = PCA957x_BANK_INPUT;
+
+ if (chip->driver_data & PCA_PCAL)
+ bank |= PCAL9xxx_BANK_IRQ_STAT;
- return i2c_smbus_write_byte_data(chip->client, (reg << 1) + 1, val[1]);
+ return pca953x_check_register(chip, reg, bank);
}
-static int pca953x_write_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
+const struct regmap_config pca953x_i2c_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .readable_reg = pca953x_readable_register,
+ .writeable_reg = pca953x_writeable_register,
+ .volatile_reg = pca953x_volatile_register,
+
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = 0x7f,
+};
+
+static u8 pca953x_recalc_addr(struct pca953x_chip *chip, int reg, int off,
+ bool write, bool addrinc)
{
- int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
+ int bank_shift = pca953x_bank_shift(chip);
int addr = (reg & PCAL_GPIO_MASK) << bank_shift;
int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1;
+ u8 regaddr = pinctrl | addr | (off / BANK_SZ);
+
+ /* Single byte read doesn't need AI bit set. */
+ if (!addrinc)
+ return regaddr;
+
+ /* Chips with 24 and more GPIOs always support Auto Increment */
+ if (write && NBANK(chip) > 2)
+ regaddr |= REG_ADDR_AI;
- return i2c_smbus_write_i2c_block_data(chip->client,
- pinctrl | addr | REG_ADDR_AI,
- NBANK(chip), val);
+ /* PCA9575 needs address-increment on multi-byte writes */
+ if (PCA_CHIP_TYPE(chip->driver_data) == PCA957X_TYPE)
+ regaddr |= REG_ADDR_AI;
+
+ return regaddr;
}
static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
{
- int ret = 0;
+ u8 regaddr = pca953x_recalc_addr(chip, reg, 0, true, true);
+ int ret;
- ret = chip->write_regs(chip, reg, val);
+ ret = regmap_bulk_write(chip->regmap, regaddr, val, NBANK(chip));
if (ret < 0) {
dev_err(&chip->client->dev, "failed writing register\n");
return ret;
@@ -243,42 +338,12 @@ static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
return 0;
}
-static int pca953x_read_regs_8(struct pca953x_chip *chip, int reg, u8 *val)
-{
- int ret;
-
- ret = i2c_smbus_read_byte_data(chip->client, reg);
- *val = ret;
-
- return ret;
-}
-
-static int pca953x_read_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
-{
- int ret;
-
- ret = i2c_smbus_read_word_data(chip->client, reg << 1);
- put_unaligned(ret, (u16 *)val);
-
- return ret;
-}
-
-static int pca953x_read_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
-{
- int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
- int addr = (reg & PCAL_GPIO_MASK) << bank_shift;
- int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1;
-
- return i2c_smbus_read_i2c_block_data(chip->client,
- pinctrl | addr | REG_ADDR_AI,
- NBANK(chip), val);
-}
-
static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val)
{
+ u8 regaddr = pca953x_recalc_addr(chip, reg, 0, false, true);
int ret;
- ret = chip->read_regs(chip, reg, val);
+ ret = regmap_bulk_read(chip->regmap, regaddr, val, NBANK(chip));
if (ret < 0) {
dev_err(&chip->client->dev, "failed reading register\n");
return ret;
@@ -290,18 +355,13 @@ static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val)
static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
- u8 reg_val;
+ u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off,
+ true, false);
+ u8 bit = BIT(off % BANK_SZ);
int ret;
mutex_lock(&chip->i2c_lock);
- reg_val = chip->reg_direction[off / BANK_SZ] | (1u << (off % BANK_SZ));
-
- ret = pca953x_write_single(chip, chip->regs->direction, reg_val, off);
- if (ret)
- goto exit;
-
- chip->reg_direction[off / BANK_SZ] = reg_val;
-exit:
+ ret = regmap_write_bits(chip->regmap, dirreg, bit, bit);
mutex_unlock(&chip->i2c_lock);
return ret;
}
@@ -310,31 +370,21 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc,
unsigned off, int val)
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
- u8 reg_val;
+ u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off,
+ true, false);
+ u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off,
+ true, false);
+ u8 bit = BIT(off % BANK_SZ);
int ret;
mutex_lock(&chip->i2c_lock);
/* set output level */
- if (val)
- reg_val = chip->reg_output[off / BANK_SZ]
- | (1u << (off % BANK_SZ));
- else
- reg_val = chip->reg_output[off / BANK_SZ]
- & ~(1u << (off % BANK_SZ));
-
- ret = pca953x_write_single(chip, chip->regs->output, reg_val, off);
+ ret = regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
if (ret)
goto exit;
- chip->reg_output[off / BANK_SZ] = reg_val;
-
/* then direction */
- reg_val = chip->reg_direction[off / BANK_SZ] & ~(1u << (off % BANK_SZ));
- ret = pca953x_write_single(chip, chip->regs->direction, reg_val, off);
- if (ret)
- goto exit;
-
- chip->reg_direction[off / BANK_SZ] = reg_val;
+ ret = regmap_write_bits(chip->regmap, dirreg, bit, 0);
exit:
mutex_unlock(&chip->i2c_lock);
return ret;
@@ -343,11 +393,14 @@ exit:
static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
+ u8 inreg = pca953x_recalc_addr(chip, chip->regs->input, off,
+ true, false);
+ u8 bit = BIT(off % BANK_SZ);
u32 reg_val;
int ret;
mutex_lock(&chip->i2c_lock);
- ret = pca953x_read_single(chip, chip->regs->input, &reg_val, off);
+ ret = regmap_read(chip->regmap, inreg, &reg_val);
mutex_unlock(&chip->i2c_lock);
if (ret < 0) {
/* NOTE: diagnostic already emitted; that's all we should
@@ -357,45 +410,37 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
return 0;
}
- return (reg_val & (1u << (off % BANK_SZ))) ? 1 : 0;
+ return !!(reg_val & bit);
}
static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
- u8 reg_val;
- int ret;
+ u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off,
+ true, false);
+ u8 bit = BIT(off % BANK_SZ);
mutex_lock(&chip->i2c_lock);
- if (val)
- reg_val = chip->reg_output[off / BANK_SZ]
- | (1u << (off % BANK_SZ));
- else
- reg_val = chip->reg_output[off / BANK_SZ]
- & ~(1u << (off % BANK_SZ));
-
- ret = pca953x_write_single(chip, chip->regs->output, reg_val, off);
- if (ret)
- goto exit;
-
- chip->reg_output[off / BANK_SZ] = reg_val;
-exit:
+ regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
mutex_unlock(&chip->i2c_lock);
}
static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
+ u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off,
+ true, false);
+ u8 bit = BIT(off % BANK_SZ);
u32 reg_val;
int ret;
mutex_lock(&chip->i2c_lock);
- ret = pca953x_read_single(chip, chip->regs->direction, &reg_val, off);
+ ret = regmap_read(chip->regmap, dirreg, &reg_val);
mutex_unlock(&chip->i2c_lock);
if (ret < 0)
return ret;
- return !!(reg_val & (1u << (off % BANK_SZ)));
+ return !!(reg_val & bit);
}
static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
@@ -403,14 +448,15 @@ static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
unsigned int bank_mask, bank_val;
- int bank_shift, bank;
+ int bank;
u8 reg_val[MAX_BANK];
int ret;
- bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
-
mutex_lock(&chip->i2c_lock);
- memcpy(reg_val, chip->reg_output, NBANK(chip));
+ ret = pca953x_read_regs(chip, chip->regs->output, reg_val);
+ if (ret)
+ goto exit;
+
for (bank = 0; bank < NBANK(chip); bank++) {
bank_mask = mask[bank / sizeof(*mask)] >>
((bank % sizeof(*mask)) * 8);
@@ -422,13 +468,7 @@ static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
}
}
- ret = i2c_smbus_write_i2c_block_data(chip->client,
- chip->regs->output << bank_shift,
- NBANK(chip), reg_val);
- if (ret)
- goto exit;
-
- memcpy(chip->reg_output, reg_val, NBANK(chip));
+ pca953x_write_regs(chip, chip->regs->output, reg_val);
exit:
mutex_unlock(&chip->i2c_lock);
}
@@ -487,6 +527,10 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
u8 new_irqs;
int level, i;
u8 invert_irq_mask[MAX_BANK];
+ int reg_direction[MAX_BANK];
+
+ regmap_bulk_read(chip->regmap, chip->regs->direction, reg_direction,
+ NBANK(chip));
if (chip->driver_data & PCA_PCAL) {
/* Enable latch on interrupt-enabled inputs */
@@ -502,7 +546,7 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
/* Look for any newly setup interrupt */
for (i = 0; i < NBANK(chip); i++) {
new_irqs = chip->irq_trig_fall[i] | chip->irq_trig_raise[i];
- new_irqs &= ~chip->reg_direction[i];
+ new_irqs &= reg_direction[i];
while (new_irqs) {
level = __ffs(new_irqs);
@@ -567,6 +611,7 @@ static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
bool pending_seen = false;
bool trigger_seen = false;
u8 trigger[MAX_BANK];
+ int reg_direction[MAX_BANK];
int ret, i;
if (chip->driver_data & PCA_PCAL) {
@@ -597,8 +642,10 @@ static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
return false;
/* Remove output pins from the equation */
+ regmap_bulk_read(chip->regmap, chip->regs->direction, reg_direction,
+ NBANK(chip));
for (i = 0; i < NBANK(chip); i++)
- cur_stat[i] &= chip->reg_direction[i];
+ cur_stat[i] &= reg_direction[i];
memcpy(old_stat, chip->irq_stat, NBANK(chip));
@@ -652,6 +699,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
int irq_base)
{
struct i2c_client *client = chip->client;
+ int reg_direction[MAX_BANK];
int ret, i;
if (client->irq && irq_base != -1
@@ -666,8 +714,10 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
* interrupt. We have to rely on the previous read for
* this purpose.
*/
+ regmap_bulk_read(chip->regmap, chip->regs->direction,
+ reg_direction, NBANK(chip));
for (i = 0; i < NBANK(chip); i++)
- chip->irq_stat[i] &= chip->reg_direction[i];
+ chip->irq_stat[i] &= reg_direction[i];
mutex_init(&chip->irq_lock);
ret = devm_request_threaded_irq(&client->dev,
@@ -715,20 +765,19 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
}
#endif
-static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
+static int device_pca95xx_init(struct pca953x_chip *chip, u32 invert)
{
int ret;
u8 val[MAX_BANK];
- chip->regs = &pca953x_regs;
-
- ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
- if (ret)
+ ret = regcache_sync_region(chip->regmap, chip->regs->output,
+ chip->regs->output + NBANK(chip));
+ if (ret != 0)
goto out;
- ret = pca953x_read_regs(chip, chip->regs->direction,
- chip->reg_direction);
- if (ret)
+ ret = regcache_sync_region(chip->regmap, chip->regs->direction,
+ chip->regs->direction + NBANK(chip));
+ if (ret != 0)
goto out;
/* set platform specific polarity inversion */
@@ -737,7 +786,7 @@ static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
else
memset(val, 0, NBANK(chip));
- ret = pca953x_write_regs(chip, PCA953X_INVERT, val);
+ ret = pca953x_write_regs(chip, chip->regs->invert, val);
out:
return ret;
}
@@ -747,22 +796,7 @@ static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
int ret;
u8 val[MAX_BANK];
- chip->regs = &pca957x_regs;
-
- ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
- if (ret)
- goto out;
- ret = pca953x_read_regs(chip, chip->regs->direction,
- chip->reg_direction);
- if (ret)
- goto out;
-
- /* set platform specific polarity inversion */
- if (invert)
- memset(val, 0xFF, NBANK(chip));
- else
- memset(val, 0, NBANK(chip));
- ret = pca953x_write_regs(chip, PCA957X_INVRT, val);
+ ret = device_pca95xx_init(chip, invert);
if (ret)
goto out;
@@ -853,6 +887,16 @@ static int pca953x_probe(struct i2c_client *client,
}
}
+ i2c_set_clientdata(client, chip);
+
+ chip->regmap = devm_regmap_init_i2c(client, &pca953x_i2c_regmap);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ goto err_exit;
+ }
+
+ regcache_mark_dirty(chip->regmap);
+
mutex_init(&chip->i2c_lock);
/*
* In case we have an i2c-mux controlled by a GPIO provided by an
@@ -878,24 +922,13 @@ static int pca953x_probe(struct i2c_client *client,
*/
pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
- if (chip->gpio_chip.ngpio <= 8) {
- chip->write_regs = pca953x_write_regs_8;
- chip->read_regs = pca953x_read_regs_8;
- } else if (chip->gpio_chip.ngpio >= 24) {
- chip->write_regs = pca953x_write_regs_24;
- chip->read_regs = pca953x_read_regs_24;
+ if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
+ chip->regs = &pca953x_regs;
+ ret = device_pca95xx_init(chip, invert);
} else {
- if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
- chip->write_regs = pca953x_write_regs_16;
- else
- chip->write_regs = pca957x_write_regs_16;
- chip->read_regs = pca953x_read_regs_16;
- }
-
- if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
- ret = device_pca953x_init(chip, invert);
- else
+ chip->regs = &pca957x_regs;
ret = device_pca957x_init(chip, invert);
+ }
if (ret)
goto err_exit;
@@ -914,7 +947,6 @@ static int pca953x_probe(struct i2c_client *client,
dev_warn(&client->dev, "setup failed, %d\n", ret);
}
- i2c_set_clientdata(client, chip);
return 0;
err_exit:
@@ -943,6 +975,91 @@ static int pca953x_remove(struct i2c_client *client)
return ret;
}
+#ifdef CONFIG_PM_SLEEP
+static int pca953x_regcache_sync(struct device *dev)
+{
+ struct pca953x_chip *chip = dev_get_drvdata(dev);
+ int ret;
+
+ /*
+ * The ordering between direction and output is important,
+ * sync these registers first and only then sync the rest.
+ */
+ ret = regcache_sync_region(chip->regmap, chip->regs->direction,
+ chip->regs->direction + NBANK(chip));
+ if (ret != 0) {
+ dev_err(dev, "Failed to sync GPIO dir registers: %d\n", ret);
+ return ret;
+ }
+
+ ret = regcache_sync_region(chip->regmap, chip->regs->output,
+ chip->regs->output + NBANK(chip));
+ if (ret != 0) {
+ dev_err(dev, "Failed to sync GPIO out registers: %d\n", ret);
+ return ret;
+ }
+
+#ifdef CONFIG_GPIO_PCA953X_IRQ
+ if (chip->driver_data & PCA_PCAL) {
+ ret = regcache_sync_region(chip->regmap, PCAL953X_IN_LATCH,
+ PCAL953X_IN_LATCH + NBANK(chip));
+ if (ret != 0) {
+ dev_err(dev, "Failed to sync INT latch registers: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = regcache_sync_region(chip->regmap, PCAL953X_INT_MASK,
+ PCAL953X_INT_MASK + NBANK(chip));
+ if (ret != 0) {
+ dev_err(dev, "Failed to sync INT mask registers: %d\n",
+ ret);
+ return ret;
+ }
+ }
+#endif
+
+ return 0;
+}
+
+static int pca953x_suspend(struct device *dev)
+{
+ struct pca953x_chip *chip = dev_get_drvdata(dev);
+
+ regcache_cache_only(chip->regmap, true);
+
+ regulator_disable(chip->regulator);
+
+ return 0;
+}
+
+static int pca953x_resume(struct device *dev)
+{
+ struct pca953x_chip *chip = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regulator_enable(chip->regulator);
+ if (ret != 0) {
+ dev_err(dev, "Failed to enable regulator: %d\n", ret);
+ return 0;
+ }
+
+ regcache_cache_only(chip->regmap, false);
+ regcache_mark_dirty(chip->regmap);
+ ret = pca953x_regcache_sync(dev);
+ if (ret)
+ return ret;
+
+ ret = regcache_sync(chip->regmap);
+ if (ret != 0) {
+ dev_err(dev, "Failed to restore register map: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
/* convenience to stop overlong match-table lines */
#define OF_953X(__nrgpio, __int) (void *)(__nrgpio | PCA953X_TYPE | __int)
#define OF_957X(__nrgpio, __int) (void *)(__nrgpio | PCA957X_TYPE | __int)
@@ -986,9 +1103,12 @@ static const struct of_device_id pca953x_dt_ids[] = {
MODULE_DEVICE_TABLE(of, pca953x_dt_ids);
+static SIMPLE_DEV_PM_OPS(pca953x_pm_ops, pca953x_suspend, pca953x_resume);
+
static struct i2c_driver pca953x_driver = {
.driver = {
.name = "pca953x",
+ .pm = &pca953x_pm_ops,
.of_match_table = pca953x_dt_ids,
.acpi_match_table = ACPI_PTR(pca953x_acpi_ids),
},