From 68b14134be55eca7340b9a8b3ec4cb8f79622a3c Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 9 Aug 2013 11:41:52 +0100 Subject: [PATCH] usb: misc: usb3503: Convert to regmap This will give access to the diagnostic infrastructure regmap has but the main point is to support future refactoring. Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/Kconfig | 1 + drivers/usb/misc/usb3503.c | 93 +++++++++++++++----------------------- 2 files changed, 37 insertions(+), 57 deletions(-) diff --git a/drivers/usb/misc/Kconfig b/drivers/usb/misc/Kconfig index ca91420f5c21..e2b21c1d9c40 100644 --- a/drivers/usb/misc/Kconfig +++ b/drivers/usb/misc/Kconfig @@ -246,5 +246,6 @@ config USB_EZUSB_FX2 config USB_HSIC_USB3503 tristate "USB3503 HSIC to USB20 Driver" depends on I2C + select REGMAP help This option enables support for SMSC USB3503 HSIC to USB 2.0 Driver. diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c index 4b6572a37e87..f2c0356b7148 100644 --- a/drivers/usb/misc/usb3503.c +++ b/drivers/usb/misc/usb3503.c @@ -26,6 +26,7 @@ #include #include #include +#include #define USB3503_VIDL 0x00 #define USB3503_VIDM 0x01 @@ -50,56 +51,18 @@ #define USB3503_CFGP 0xee #define USB3503_CLKSUSP (1 << 7) +#define USB3503_RESET 0xff + struct usb3503 { enum usb3503_mode mode; - struct i2c_client *client; + struct regmap *regmap; + struct device *dev; u8 port_off_mask; int gpio_intn; int gpio_reset; int gpio_connect; }; -static int usb3503_write_register(struct i2c_client *client, - char reg, char data) -{ - return i2c_smbus_write_byte_data(client, reg, data); -} - -static int usb3503_read_register(struct i2c_client *client, char reg) -{ - return i2c_smbus_read_byte_data(client, reg); -} - -static int usb3503_set_bits(struct i2c_client *client, char reg, char req) -{ - int err; - - err = usb3503_read_register(client, reg); - if (err < 0) - return err; - - err = usb3503_write_register(client, reg, err | req); - if (err < 0) - return err; - - return 0; -} - -static int usb3503_clear_bits(struct i2c_client *client, char reg, char req) -{ - int err; - - err = usb3503_read_register(client, reg); - if (err < 0) - return err; - - err = usb3503_write_register(client, reg, err & ~req); - if (err < 0) - return err; - - return 0; -} - static int usb3503_reset(struct usb3503 *hub, int state) { if (!state && gpio_is_valid(hub->gpio_connect)) @@ -117,7 +80,7 @@ static int usb3503_reset(struct usb3503 *hub, int state) static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) { - struct i2c_client *i2c = hub->client; + struct device *dev = hub->dev; int err = 0; switch (mode) { @@ -125,37 +88,40 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) usb3503_reset(hub, 1); /* SP_ILOCK: set connect_n, config_n for config */ - err = usb3503_write_register(i2c, USB3503_SP_ILOCK, + err = regmap_write(hub->regmap, USB3503_SP_ILOCK, (USB3503_SPILOCK_CONNECT | USB3503_SPILOCK_CONFIG)); if (err < 0) { - dev_err(&i2c->dev, "SP_ILOCK failed (%d)\n", err); + dev_err(dev, "SP_ILOCK failed (%d)\n", err); goto err_hubmode; } /* PDS : Disable For Self Powered Operation */ if (hub->port_off_mask) { - err = usb3503_set_bits(i2c, USB3503_PDS, + err = regmap_update_bits(hub->regmap, USB3503_PDS, + hub->port_off_mask, hub->port_off_mask); if (err < 0) { - dev_err(&i2c->dev, "PDS failed (%d)\n", err); + dev_err(dev, "PDS failed (%d)\n", err); goto err_hubmode; } } /* CFG1 : SELF_BUS_PWR -> Self-Powerd operation */ - err = usb3503_set_bits(i2c, USB3503_CFG1, USB3503_SELF_BUS_PWR); + err = regmap_update_bits(hub->regmap, USB3503_CFG1, + USB3503_SELF_BUS_PWR, + USB3503_SELF_BUS_PWR); if (err < 0) { - dev_err(&i2c->dev, "CFG1 failed (%d)\n", err); + dev_err(dev, "CFG1 failed (%d)\n", err); goto err_hubmode; } /* SP_LOCK: clear connect_n, config_n for hub connect */ - err = usb3503_clear_bits(i2c, USB3503_SP_ILOCK, - (USB3503_SPILOCK_CONNECT - | USB3503_SPILOCK_CONFIG)); + err = regmap_update_bits(hub->regmap, USB3503_SP_ILOCK, + (USB3503_SPILOCK_CONNECT + | USB3503_SPILOCK_CONFIG), 0); if (err < 0) { - dev_err(&i2c->dev, "SP_ILOCK failed (%d)\n", err); + dev_err(dev, "SP_ILOCK failed (%d)\n", err); goto err_hubmode; } @@ -163,18 +129,18 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) gpio_set_value_cansleep(hub->gpio_connect, 1); hub->mode = mode; - dev_info(&i2c->dev, "switched to HUB mode\n"); + dev_info(dev, "switched to HUB mode\n"); break; case USB3503_MODE_STANDBY: usb3503_reset(hub, 0); hub->mode = mode; - dev_info(&i2c->dev, "switched to STANDBY mode\n"); + dev_info(dev, "switched to STANDBY mode\n"); break; default: - dev_err(&i2c->dev, "unknown mode is request\n"); + dev_err(dev, "unknown mode is request\n"); err = -EINVAL; break; } @@ -183,6 +149,13 @@ err_hubmode: return err; } +static const struct regmap_config usb3503_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = USB3503_RESET, +}; + static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct usb3503_platform_data *pdata = dev_get_platdata(&i2c->dev); @@ -200,7 +173,13 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id) } i2c_set_clientdata(i2c, hub); - hub->client = i2c; + hub->regmap = devm_regmap_init_i2c(i2c, &usb3503_regmap_config); + if (IS_ERR(hub->regmap)) { + err = PTR_ERR(hub->regmap); + dev_err(&i2c->dev, "Failed to initialise regmap: %d\n", err); + return err; + } + hub->dev = &i2c->dev; if (pdata) { hub->port_off_mask = pdata->port_off_mask; -- 2.20.1