From ab5dc372021def8f40b34761babecad0bf868b1c Mon Sep 17 00:00:00 2001 From: David Brownell Date: Tue, 6 Jan 2009 14:42:27 -0800 Subject: [PATCH] gpio: pca953x handles more chips, i2c fault codes Minor updates to the pca953x GPIO expander driver: handle several more compatible parts, and stop assuming that the I2C layer's return codes are garbage (that's now been fixed). Signed-off-by: David Brownell Cc: Eric Miao Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/gpio/Kconfig | 7 ++++--- drivers/gpio/pca953x.c | 12 +++++++----- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 48f49d93d24..3d2565441b3 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -95,7 +95,7 @@ config GPIO_MAX732X number for these GPIOs. config GPIO_PCA953X - tristate "PCA953x, PCA955x, and MAX7310 I/O ports" + tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" depends on I2C help Say yes here to provide access to several register-oriented @@ -104,9 +104,10 @@ config GPIO_PCA953X 4 bits: pca9536, pca9537 - 8 bits: max7310, pca9534, pca9538, pca9554, pca9557 + 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, + tca6408 - 16 bits: pca9535, pca9539, pca9555 + 16 bits: pca9535, pca9539, pca9555, tca6416 This driver can also be built as a module. If so, the module will be called pca953x. diff --git a/drivers/gpio/pca953x.c b/drivers/gpio/pca953x.c index 9ceeb89f132..37f35388a2a 100644 --- a/drivers/gpio/pca953x.c +++ b/drivers/gpio/pca953x.c @@ -33,7 +33,12 @@ static const struct i2c_device_id pca953x_id[] = { { "pca9554", 8, }, { "pca9555", 16, }, { "pca9557", 8, }, + { "max7310", 8, }, + { "pca6107", 8, }, + { "tca6408", 8, }, + { "tca6416", 16, }, + /* NYET: { "tca6424", 24, }, */ { } }; MODULE_DEVICE_TABLE(i2c, pca953x_id); @@ -47,9 +52,6 @@ struct pca953x_chip { struct gpio_chip gpio_chip; }; -/* NOTE: we can't currently rely on fault codes to come from SMBus - * calls, so we map all errors to EIO here and return zero otherwise. - */ static int pca953x_write_reg(struct pca953x_chip *chip, int reg, uint16_t val) { int ret; @@ -61,7 +63,7 @@ static int pca953x_write_reg(struct pca953x_chip *chip, int reg, uint16_t val) if (ret < 0) { dev_err(&chip->client->dev, "failed writing register\n"); - return -EIO; + return ret; } return 0; @@ -78,7 +80,7 @@ static int pca953x_read_reg(struct pca953x_chip *chip, int reg, uint16_t *val) if (ret < 0) { dev_err(&chip->client->dev, "failed reading register\n"); - return -EIO; + return ret; } *val = (uint16_t)ret; -- 2.41.1