diff options
Diffstat (limited to 'drivers/tty/serial/max310x.c')
| -rw-r--r-- | drivers/tty/serial/max310x.c | 329 |
1 files changed, 165 insertions, 164 deletions
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 10bf6d75bf9e..14dd9cfaa9f7 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -30,6 +30,7 @@ #define MAX310X_MAJOR 204 #define MAX310X_MINOR 209 #define MAX310X_UART_NRMAX 16 +#define MAX310X_MAX_PORTS 4 /* Maximum number of UART ports per IC. */ /* MAX310X register definitions */ #define MAX310X_RHR_REG (0x00) /* RX FIFO */ @@ -66,6 +67,7 @@ #define MAX310X_BRGDIVMSB_REG (0x1d) /* Baud rate divisor MSB */ #define MAX310X_CLKSRC_REG (0x1e) /* Clock source */ #define MAX310X_REG_1F (0x1f) +#define MAX310X_EXTREG_START (0x20) /* Only relevant in SPI mode. */ #define MAX310X_REVID_REG MAX310X_REG_1F /* Revision ID */ @@ -73,9 +75,9 @@ #define MAX310X_GLOBALCMD_REG MAX310X_REG_1F /* Global Command (WO) */ /* Extended registers */ -#define MAX310X_SPI_REVID_EXTREG MAX310X_REG_05 /* Revision ID */ -#define MAX310X_I2C_REVID_EXTREG (0x25) /* Revision ID */ - +#define MAX310X_REVID_EXTREG (0x25) /* Revision ID + * (extended addressing space) + */ /* IRQ register bits */ #define MAX310X_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ #define MAX310X_IRQ_SPCHR_BIT (1 << 1) /* Special char interrupt */ @@ -160,14 +162,14 @@ #define MAX310X_IRDA_SIR_BIT (1 << 1) /* SIR mode enable */ /* Flow control trigger level register masks */ -#define MAX310X_FLOWLVL_HALT_MASK (0x000f) /* Flow control halt level */ -#define MAX310X_FLOWLVL_RES_MASK (0x00f0) /* Flow control resume level */ +#define MAX310X_FLOWLVL_HALT_MASK GENMASK(3, 0) /* Flow control halt level */ +#define MAX310X_FLOWLVL_RES_MASK GENMASK(7, 4) /* Flow control resume level */ #define MAX310X_FLOWLVL_HALT(words) ((words / 8) & 0x0f) #define MAX310X_FLOWLVL_RES(words) (((words / 8) & 0x0f) << 4) /* FIFO interrupt trigger level register masks */ -#define MAX310X_FIFOTRIGLVL_TX_MASK (0x0f) /* TX FIFO trigger level */ -#define MAX310X_FIFOTRIGLVL_RX_MASK (0xf0) /* RX FIFO trigger level */ +#define MAX310X_FIFOTRIGLVL_TX_MASK GENMASK(3, 0) /* TX FIFO trigger level */ +#define MAX310X_FIFOTRIGLVL_RX_MASK GENMASK(7, 4) /* RX FIFO trigger level */ #define MAX310X_FIFOTRIGLVL_TX(words) ((words / 8) & 0x0f) #define MAX310X_FIFOTRIGLVL_RX(words) (((words / 8) & 0x0f) << 4) @@ -177,7 +179,8 @@ #define MAX310X_FLOWCTRL_GPIADDR_BIT (1 << 2) /* Enables that GPIO inputs * are used in conjunction with * XOFF2 for definition of - * special character */ + * special character + */ #define MAX310X_FLOWCTRL_SWFLOWEN_BIT (1 << 3) /* Auto SW flow ctrl enable */ #define MAX310X_FLOWCTRL_SWFLOW0_BIT (1 << 4) /* SWFLOW bit 0 */ #define MAX310X_FLOWCTRL_SWFLOW1_BIT (1 << 5) /* SWFLOW bit 1 @@ -214,8 +217,8 @@ */ /* PLL configuration register masks */ -#define MAX310X_PLLCFG_PREDIV_MASK (0x3f) /* PLL predivision value */ -#define MAX310X_PLLCFG_PLLFACTOR_MASK (0xc0) /* PLL multiplication factor */ +#define MAX310X_PLLCFG_PREDIV_MASK GENMASK(5, 0) /* PLL predivision value */ +#define MAX310X_PLLCFG_PLLFACTOR_MASK GENMASK(7, 6) /* PLL multiplication factor */ /* Baud rate generator configuration register bits */ #define MAX310X_BRGCFG_2XMODE_BIT (1 << 4) /* Double baud rate */ @@ -234,7 +237,7 @@ /* Misc definitions */ #define MAX310X_FIFO_SIZE (128) -#define MAX310x_REV_MASK (0xf8) +#define MAX310x_REV_MASK GENMASK(7, 3) #define MAX310X_WRITE_BIT 0x80 /* Port startup definitions */ @@ -257,20 +260,21 @@ struct max310x_if_cfg { int (*extended_reg_enable)(struct device *dev, bool enable); - - unsigned int rev_id_reg; + u8 rev_id_offset; }; struct max310x_devtype { struct { unsigned short min; unsigned short max; - } slave_addr; - char name[9]; + } slave_addr; /* Relevant only in I2C mode. */ int nr; + char name[9]; u8 mode1; - int (*detect)(struct device *); - void (*power)(struct uart_port *, int); + u8 rev_id_val; + u8 rev_id_reg; /* Relevant only if rev_id_val is defined. */ + u8 power_reg; /* Register address for power/sleep control. */ + u8 power_bit; /* Bit for sleep or power-off mode (active high). */ }; struct max310x_one { @@ -331,62 +335,52 @@ static void max310x_port_update(struct uart_port *port, u8 reg, u8 mask, u8 val) regmap_update_bits(one->regmap, reg, mask, val); } -static int max3107_detect(struct device *dev) +static int max310x_detect(struct device *dev) { struct max310x_port *s = dev_get_drvdata(dev); unsigned int val = 0; int ret; - ret = regmap_read(s->regmap, MAX310X_REVID_REG, &val); - if (ret) - return ret; + /* Check if variant supports REV ID register: */ + if (s->devtype->rev_id_val) { + u8 rev_id_reg = s->devtype->rev_id_reg; - if (((val & MAX310x_REV_MASK) != MAX3107_REV_ID)) { - dev_err(dev, - "%s ID 0x%02x does not match\n", s->devtype->name, val); - return -ENODEV; - } - - return 0; -} + /* Check if REV ID is in extended addressing space: */ + if (s->devtype->rev_id_reg >= MAX310X_EXTREG_START) { + ret = s->if_cfg->extended_reg_enable(dev, true); + if (ret) + return ret; -static int max3108_detect(struct device *dev) -{ - struct max310x_port *s = dev_get_drvdata(dev); - unsigned int val = 0; - int ret; - - /* MAX3108 have not REV ID register, we just check default value - * from clocksource register to make sure everything works. - */ - ret = regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val); - if (ret) - return ret; - - if (val != (MAX310X_CLKSRC_EXTCLK_BIT | MAX310X_CLKSRC_PLLBYP_BIT)) { - dev_err(dev, "%s not present\n", s->devtype->name); - return -ENODEV; - } + /* Adjust REV ID extended addressing space address: */ + if (s->if_cfg->rev_id_offset) + rev_id_reg -= s->if_cfg->rev_id_offset; + } - return 0; -} + regmap_read(s->regmap, rev_id_reg, &val); -static int max3109_detect(struct device *dev) -{ - struct max310x_port *s = dev_get_drvdata(dev); - unsigned int val = 0; - int ret; - - ret = s->if_cfg->extended_reg_enable(dev, true); - if (ret) - return ret; + if (s->devtype->rev_id_reg >= MAX310X_EXTREG_START) { + ret = s->if_cfg->extended_reg_enable(dev, false); + if (ret) + return ret; + } - regmap_read(s->regmap, s->if_cfg->rev_id_reg, &val); - s->if_cfg->extended_reg_enable(dev, false); - if (((val & MAX310x_REV_MASK) != MAX3109_REV_ID)) { - dev_err(dev, - "%s ID 0x%02x does not match\n", s->devtype->name, val); - return -ENODEV; + if (((val & MAX310x_REV_MASK) != s->devtype->rev_id_val)) + return dev_err_probe(dev, -ENODEV, + "%s ID 0x%02x does not match\n", + s->devtype->name, val); + } else { + /* + * For variant without REV ID register, just check default value + * from clocksource register to make sure everything works. + */ + ret = regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val); + if (ret) + return ret; + + if (val != (MAX310X_CLKSRC_EXTCLK_BIT | MAX310X_CLKSRC_PLLBYP_BIT)) + return dev_err_probe(dev, -ENODEV, + "%s not present\n", + s->devtype->name); } return 0; @@ -394,39 +388,10 @@ static int max3109_detect(struct device *dev) static void max310x_power(struct uart_port *port, int on) { - max310x_port_update(port, MAX310X_MODE1_REG, - MAX310X_MODE1_FORCESLEEP_BIT, - on ? 0 : MAX310X_MODE1_FORCESLEEP_BIT); - if (on) - msleep(50); -} - -static int max14830_detect(struct device *dev) -{ - struct max310x_port *s = dev_get_drvdata(dev); - unsigned int val = 0; - int ret; - - ret = s->if_cfg->extended_reg_enable(dev, true); - if (ret) - return ret; - - regmap_read(s->regmap, s->if_cfg->rev_id_reg, &val); - s->if_cfg->extended_reg_enable(dev, false); - if (((val & MAX310x_REV_MASK) != MAX14830_REV_ID)) { - dev_err(dev, - "%s ID 0x%02x does not match\n", s->devtype->name, val); - return -ENODEV; - } - - return 0; -} + struct max310x_port *s = dev_get_drvdata(port->dev); -static void max14830_power(struct uart_port *port, int on) -{ - max310x_port_update(port, MAX310X_BRGCFG_REG, - MAX14830_BRGCFG_CLKDIS_BIT, - on ? 0 : MAX14830_BRGCFG_CLKDIS_BIT); + max310x_port_update(port, s->devtype->power_reg, s->devtype->power_bit, + on ? 0 : s->devtype->power_bit); if (on) msleep(50); } @@ -435,8 +400,10 @@ static const struct max310x_devtype max3107_devtype = { .name = "MAX3107", .nr = 1, .mode1 = MAX310X_MODE1_AUTOSLEEP_BIT | MAX310X_MODE1_IRQSEL_BIT, - .detect = max3107_detect, - .power = max310x_power, + .rev_id_val = MAX3107_REV_ID, + .rev_id_reg = MAX310X_REVID_REG, + .power_reg = MAX310X_MODE1_REG, + .power_bit = MAX310X_MODE1_FORCESLEEP_BIT, .slave_addr = { .min = 0x2c, .max = 0x2f, @@ -447,8 +414,10 @@ static const struct max310x_devtype max3108_devtype = { .name = "MAX3108", .nr = 1, .mode1 = MAX310X_MODE1_AUTOSLEEP_BIT, - .detect = max3108_detect, - .power = max310x_power, + .rev_id_val = 0, /* Unsupported. */ + .rev_id_reg = 0, /* Irrelevant when rev_id_val is not defined. */ + .power_reg = MAX310X_MODE1_REG, + .power_bit = MAX310X_MODE1_FORCESLEEP_BIT, .slave_addr = { .min = 0x60, .max = 0x6f, @@ -459,8 +428,10 @@ static const struct max310x_devtype max3109_devtype = { .name = "MAX3109", .nr = 2, .mode1 = MAX310X_MODE1_AUTOSLEEP_BIT, - .detect = max3109_detect, - .power = max310x_power, + .rev_id_val = MAX3109_REV_ID, + .rev_id_reg = MAX310X_REVID_EXTREG, + .power_reg = MAX310X_MODE1_REG, + .power_bit = MAX310X_MODE1_FORCESLEEP_BIT, .slave_addr = { .min = 0x60, .max = 0x6f, @@ -471,8 +442,10 @@ static const struct max310x_devtype max14830_devtype = { .name = "MAX14830", .nr = 4, .mode1 = MAX310X_MODE1_IRQSEL_BIT, - .detect = max14830_detect, - .power = max14830_power, + .rev_id_val = MAX14830_REV_ID, + .rev_id_reg = MAX310X_REVID_EXTREG, + .power_reg = MAX310X_BRGCFG_REG, + .power_bit = MAX14830_BRGCFG_CLKDIS_BIT, .slave_addr = { .min = 0x60, .max = 0x6f, @@ -490,10 +463,8 @@ static bool max310x_reg_writeable(struct device *dev, unsigned int reg) case MAX310X_RXFIFOLVL_REG: return false; default: - break; + return true; } - - return true; } static bool max310x_reg_volatile(struct device *dev, unsigned int reg) @@ -512,10 +483,8 @@ static bool max310x_reg_volatile(struct device *dev, unsigned int reg) case MAX310X_REG_1F: return true; default: - break; + return false; } - - return false; } static bool max310x_reg_precious(struct device *dev, unsigned int reg) @@ -527,10 +496,8 @@ static bool max310x_reg_precious(struct device *dev, unsigned int reg) case MAX310X_STS_IRQSTS_REG: return true; default: - break; + return false; } - - return false; } static bool max310x_reg_noinc(struct device *dev, unsigned int reg) @@ -689,7 +656,8 @@ static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) u8 ch, flag; if (port->read_status_mask == MAX310X_LSR_RXOVR_BIT) { - /* We are just reading, happily ignoring any error conditions. + /* + * We are just reading, happily ignoring any error conditions. * Break condition, parity checking, framing errors -- they * are all ignored. That means that we can do a batch-read. * @@ -698,7 +666,7 @@ static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) * that the LSR register applies to the "current" character. * That's also the reason why we cannot do batched reads when * asked to check the individual statuses. - * */ + */ sts = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); max310x_batch_read(port, one->rx_buf, rxlen); @@ -802,8 +770,10 @@ static void max310x_handle_tx(struct uart_port *port) to_send = (to_send > txlen) ? txlen : to_send; if (until_end < to_send) { - /* It's a circ buffer -- wrap around. - * We could do that in one SPI transaction, but meh. */ + /* + * It's a circ buffer -- wrap around. + * We could do that in one SPI transaction, but meh. + */ max310x_batch_write(port, xmit->buf + xmit->tail, until_end); max310x_batch_write(port, xmit->buf, to_send - until_end); } else { @@ -848,6 +818,7 @@ static irqreturn_t max310x_port_irq(struct max310x_port *s, int portno) if (ists & MAX310X_IRQ_TXEMPTY_BIT) max310x_start_tx(port); } while (1); + return res; } @@ -892,7 +863,8 @@ static unsigned int max310x_tx_empty(struct uart_port *port) static unsigned int max310x_get_mctrl(struct uart_port *port) { - /* DCD and DSR are not wired and CTS/RTS is handled automatically + /* + * DCD and DSR are not wired and CTS/RTS is handled automatically * so just indicate DSR and CAR asserted */ return TIOCM_DSR | TIOCM_CAR; @@ -984,7 +956,8 @@ static void max310x_set_termios(struct uart_port *port, max310x_port_write(port, MAX310X_XON1_REG, termios->c_cc[VSTART]); max310x_port_write(port, MAX310X_XOFF1_REG, termios->c_cc[VSTOP]); - /* Disable transmitter before enabling AutoCTS or auto transmitter + /* + * Disable transmitter before enabling AutoCTS or auto transmitter * flow control */ if (termios->c_cflag & CRTSCTS || termios->c_iflag & IXOFF) { @@ -1011,7 +984,8 @@ static void max310x_set_termios(struct uart_port *port, } max310x_port_write(port, MAX310X_FLOWCTRL_REG, flow); - /* Enable transmitter after disabling AutoCTS and auto transmitter + /* + * Enable transmitter after disabling AutoCTS and auto transmitter * flow control */ if (!(termios->c_cflag & CRTSCTS) && !(termios->c_iflag & IXOFF)) { @@ -1072,10 +1046,9 @@ static int max310x_rs485_config(struct uart_port *port, struct ktermios *termios static int max310x_startup(struct uart_port *port) { - struct max310x_port *s = dev_get_drvdata(port->dev); unsigned int val; - s->devtype->power(port, 1); + max310x_power(port, 1); /* Configure MODE1 register */ max310x_port_update(port, MAX310X_MODE1_REG, @@ -1103,8 +1076,11 @@ static int max310x_startup(struct uart_port *port) MAX310X_MODE2_ECHOSUPR_BIT); } - /* Configure flow control levels */ - /* Flow control halt level 96, resume level 48 */ + /* + * Configure flow control levels: + * resume: 48 + * halt: 96 + */ max310x_port_write(port, MAX310X_FLOWLVL_REG, MAX310X_FLOWLVL_RES(48) | MAX310X_FLOWLVL_HALT(96)); @@ -1120,12 +1096,10 @@ static int max310x_startup(struct uart_port *port) static void max310x_shutdown(struct uart_port *port) { - struct max310x_port *s = dev_get_drvdata(port->dev); - /* Disable all interrupts */ max310x_port_write(port, MAX310X_IRQEN_REG, 0); - s->devtype->power(port, 0); + max310x_power(port, 0); } static const char *max310x_type(struct uart_port *port) @@ -1187,7 +1161,7 @@ static int __maybe_unused max310x_suspend(struct device *dev) for (i = 0; i < s->devtype->nr; i++) { uart_suspend_port(&max310x_uart, &s->p[i].port); - s->devtype->power(&s->p[i].port, 0); + max310x_power(&s->p[i].port, 0); } return 0; @@ -1199,7 +1173,7 @@ static int __maybe_unused max310x_resume(struct device *dev) int i; for (i = 0; i < s->devtype->nr; i++) { - s->devtype->power(&s->p[i].port, 1); + max310x_power(&s->p[i].port, 1); uart_resume_port(&max310x_uart, &s->p[i].port); } @@ -1209,7 +1183,7 @@ static int __maybe_unused max310x_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume); #ifdef CONFIG_GPIOLIB -static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset) +static int max310x_gpio_get(struct gpio_chip *chip, unsigned int offset) { unsigned int val; struct max310x_port *s = gpiochip_get_data(chip); @@ -1220,7 +1194,7 @@ static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset) return !!((val >> 4) & (1 << (offset % 4))); } -static void max310x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +static void max310x_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) { struct max310x_port *s = gpiochip_get_data(chip); struct uart_port *port = &s->p[offset / 4].port; @@ -1229,7 +1203,7 @@ static void max310x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) value ? 1 << (offset % 4) : 0); } -static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { struct max310x_port *s = gpiochip_get_data(chip); struct uart_port *port = &s->p[offset / 4].port; @@ -1240,7 +1214,7 @@ static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) } static int max310x_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int value) + unsigned int offset, int value) { struct max310x_port *s = gpiochip_get_data(chip); struct uart_port *port = &s->p[offset / 4].port; @@ -1296,10 +1270,9 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty /* Alloc port structure */ s = devm_kzalloc(dev, struct_size(s, p, devtype->nr), GFP_KERNEL); - if (!s) { - dev_err(dev, "Error allocating port structure\n"); - return -ENOMEM; - } + if (!s) + return dev_err_probe(dev, -ENOMEM, + "Error allocating port structure\n"); /* Always ask for fixed clock rate from a property. */ device_property_read_u32(dev, "clock-frequency", &uartclk); @@ -1320,8 +1293,7 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty if (freq == 0) freq = uartclk; if (freq == 0) { - dev_err(dev, "Cannot get clock rate\n"); - ret = -EINVAL; + ret = dev_err_probe(dev, -EINVAL, "Cannot get clock rate\n"); goto out_clk; } @@ -1345,7 +1317,7 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty dev_set_drvdata(dev, s); /* Check device to ensure we are talking to what we expect */ - ret = devtype->detect(dev); + ret = max310x_detect(dev); if (ret) goto out_clk; @@ -1427,14 +1399,13 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty /* Register port */ ret = uart_add_one_port(&max310x_uart, &s->p[i].port); - if (ret) { - s->p[i].port.dev = NULL; + if (ret) goto out_uart; - } + set_bit(line, max310x_lines); /* Go to suspend mode */ - devtype->power(&s->p[i].port, 0); + max310x_power(&s->p[i].port, 0); } #ifdef CONFIG_GPIOLIB @@ -1461,14 +1432,12 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty if (!ret) return 0; - dev_err(dev, "Unable to reguest IRQ %i\n", irq); + dev_err(dev, "Unable to request IRQ %i\n", irq); out_uart: for (i = 0; i < devtype->nr; i++) { - if (s->p[i].port.dev) { + if (test_and_clear_bit(s->p[i].port.line, max310x_lines)) uart_remove_one_port(&max310x_uart, &s->p[i].port); - clear_bit(s->p[i].port.line, max310x_lines); - } } out_clk: @@ -1486,9 +1455,11 @@ static void max310x_remove(struct device *dev) cancel_work_sync(&s->p[i].tx_work); cancel_work_sync(&s->p[i].md_work); cancel_work_sync(&s->p[i].rs_work); - uart_remove_one_port(&max310x_uart, &s->p[i].port); - clear_bit(s->p[i].port.line, max310x_lines); - s->devtype->power(&s->p[i].port, 0); + + if (test_and_clear_bit(s->p[i].port.line, max310x_lines)) + uart_remove_one_port(&max310x_uart, &s->p[i].port); + + max310x_power(&s->p[i].port, 0); } clk_disable_unprepare(s->clk); @@ -1518,6 +1489,19 @@ static struct regmap_config regcfg = { .max_raw_write = MAX310X_FIFO_SIZE, }; +static const char *max310x_regmap_name(u8 port_id) +{ + switch (port_id) { + case 0: return "port0"; + case 1: return "port1"; + case 2: return "port2"; + case 3: return "port3"; + default: + WARN_ON(true); + return NULL; + } +} + #ifdef CONFIG_SPI_MASTER static int max310x_spi_extended_reg_enable(struct device *dev, bool enable) { @@ -1529,13 +1513,13 @@ static int max310x_spi_extended_reg_enable(struct device *dev, bool enable) static const struct max310x_if_cfg __maybe_unused max310x_spi_if_cfg = { .extended_reg_enable = max310x_spi_extended_reg_enable, - .rev_id_reg = MAX310X_SPI_REVID_EXTREG, + .rev_id_offset = MAX310X_EXTREG_START, }; static int max310x_spi_probe(struct spi_device *spi) { const struct max310x_devtype *devtype; - struct regmap *regmaps[4]; + struct regmap *regmaps[MAX310X_MAX_PORTS]; unsigned int i; int ret; @@ -1547,12 +1531,14 @@ static int max310x_spi_probe(struct spi_device *spi) if (ret) return ret; - devtype = device_get_match_data(&spi->dev); + devtype = spi_get_device_match_data(spi); if (!devtype) - devtype = (struct max310x_devtype *)spi_get_device_id(spi)->driver_data; + return dev_err_probe(&spi->dev, -ENODEV, "Failed to match device\n"); for (i = 0; i < devtype->nr; i++) { u8 port_mask = i * 0x20; + + regcfg.name = max310x_regmap_name(i); regcfg.read_flag_mask = port_mask; regcfg.write_flag_mask = port_mask | MAX310X_WRITE_BIT; regmaps[i] = devm_regmap_init_spi(spi, ®cfg); @@ -1600,7 +1586,7 @@ static struct regmap_config regcfg_i2c = { .writeable_reg = max310x_reg_writeable, .volatile_reg = max310x_reg_volatile, .precious_reg = max310x_reg_precious, - .max_register = MAX310X_I2C_REVID_EXTREG, + .max_register = MAX310X_REVID_EXTREG, .writeable_noinc_reg = max310x_reg_noinc, .readable_noinc_reg = max310x_reg_noinc, .max_raw_read = MAX310X_FIFO_SIZE, @@ -1609,7 +1595,7 @@ static struct regmap_config regcfg_i2c = { static const struct max310x_if_cfg max310x_i2c_if_cfg = { .extended_reg_enable = max310x_i2c_extended_reg_enable, - .rev_id_reg = MAX310X_I2C_REVID_EXTREG, + .rev_id_offset = 0, /* No offset in I2C mode. */ }; static unsigned short max310x_i2c_slave_addr(unsigned short addr, @@ -1619,10 +1605,10 @@ static unsigned short max310x_i2c_slave_addr(unsigned short addr, * For MAX14830 and MAX3109, the slave address depends on what the * A0 and A1 pins are tied to. * See Table I2C Address Map of the datasheet. - * Based on that table, the following formulas were determined. - * UART1 - UART0 = 0x10 - * UART2 - UART1 = 0x20 + 0x10 - * UART3 - UART2 = 0x10 + * Based on that table, the following formulas were determined: + * UART1 - UART0 = 0x10 + * UART2 - UART1 = 0x20 + 0x10 + * UART3 - UART2 = 0x10 */ addr -= nr * 0x10; @@ -1635,20 +1621,24 @@ static unsigned short max310x_i2c_slave_addr(unsigned short addr, static int max310x_i2c_probe(struct i2c_client *client) { - const struct max310x_devtype *devtype = - device_get_match_data(&client->dev); + const struct max310x_devtype *devtype; struct i2c_client *port_client; - struct regmap *regmaps[4]; + struct regmap *regmaps[MAX310X_MAX_PORTS]; unsigned int i; u8 port_addr; + devtype = i2c_get_match_data(client); + if (!devtype) + return dev_err_probe(&client->dev, -ENODEV, "Failed to match device\n"); + if (client->addr < devtype->slave_addr.min || - client->addr > devtype->slave_addr.max) + client->addr > devtype->slave_addr.max) return dev_err_probe(&client->dev, -EINVAL, "Slave addr 0x%x outside of range [0x%x, 0x%x]\n", client->addr, devtype->slave_addr.min, devtype->slave_addr.max); + regcfg_i2c.name = max310x_regmap_name(0); regmaps[0] = devm_regmap_init_i2c(client, ®cfg_i2c); for (i = 1; i < devtype->nr; i++) { @@ -1657,6 +1647,7 @@ static int max310x_i2c_probe(struct i2c_client *client) client->adapter, port_addr); + regcfg_i2c.name = max310x_regmap_name(i); regmaps[i] = devm_regmap_init_i2c(port_client, ®cfg_i2c); } @@ -1669,6 +1660,15 @@ static void max310x_i2c_remove(struct i2c_client *client) max310x_remove(&client->dev); } +static const struct i2c_device_id max310x_i2c_id_table[] = { + { "max3107", (kernel_ulong_t)&max3107_devtype, }, + { "max3108", (kernel_ulong_t)&max3108_devtype, }, + { "max3109", (kernel_ulong_t)&max3109_devtype, }, + { "max14830", (kernel_ulong_t)&max14830_devtype, }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max310x_i2c_id_table); + static struct i2c_driver max310x_i2c_driver = { .driver = { .name = MAX310X_NAME, @@ -1677,6 +1677,7 @@ static struct i2c_driver max310x_i2c_driver = { }, .probe = max310x_i2c_probe, .remove = max310x_i2c_remove, + .id_table = max310x_i2c_id_table, }; #endif |