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i2c: drivers: Use generic definitions for bus frequencies

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Since we have generic definitions for bus frequencies, let's use them.

Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Robert Richter <rrichter@marvell.com>
Reviewed-by: Thor Thayer <thor.thayer@linux.intel.com>
Acked-by: Elie Morisse <syniurge@gmail.com>
Acked-by: Nehal Shah <nehal-bakulchandra.shah@amd.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Chris Brandt <chris.brandt@renesas.com>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Andy Shevchenko 2020-03-24 14:32:16 +02:00 committed by Wolfram Sang
parent 7b8c4c0b2a
commit 90224e6468
44 changed files with 165 additions and 199 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/i2c/busses/i2c-altera.c
View File

@ -147,7 +147,7 @@ static void altr_i2c_init(struct altr_i2c_dev *idev)
(ALTR_I2C_THRESHOLD << ALTR_I2C_CTRL_TCT_SHFT);
u32 t_high, t_low;
if (idev->bus_clk_rate <= 100000) {
if (idev->bus_clk_rate <= I2C_MAX_STANDARD_MODE_FREQ) {
tmp &= ~ALTR_I2C_CTRL_BSPEED;
/* Standard mode SCL 50/50 */
t_high = divisor * 1 / 2;
@ -423,10 +423,10 @@ static int altr_i2c_probe(struct platform_device *pdev)
&idev->bus_clk_rate);
if (val) {
dev_err(&pdev->dev, "Default to 100kHz\n");
idev->bus_clk_rate = 100000; /* default clock rate */
idev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */
}
if (idev->bus_clk_rate > 400000) {
if (idev->bus_clk_rate > I2C_MAX_FAST_MODE_FREQ) {
dev_err(&pdev->dev, "invalid clock-frequency %d\n",
idev->bus_clk_rate);
return -EINVAL;

27
drivers/i2c/busses/i2c-amd-mp2-plat.c
View File

@ -201,32 +201,37 @@ static int i2c_amd_resume(struct amd_i2c_common *i2c_common)
}
#endif
static const u32 supported_speeds[] = {
I2C_MAX_HIGH_SPEED_MODE_FREQ,
I2C_MAX_TURBO_MODE_FREQ,
I2C_MAX_FAST_MODE_PLUS_FREQ,
I2C_MAX_FAST_MODE_FREQ,
I2C_MAX_STANDARD_MODE_FREQ,
};
static enum speed_enum i2c_amd_get_bus_speed(struct platform_device *pdev)
{
u32 acpi_speed;
int i;
static const u32 supported_speeds[] = {
0, 100000, 400000, 1000000, 1400000, 3400000
};
acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev);
/* round down to the lowest standard speed */
for (i = 1; i < ARRAY_SIZE(supported_speeds); i++) {
if (acpi_speed < supported_speeds[i])
for (i = 0; i < ARRAY_SIZE(supported_speeds); i++) {
if (acpi_speed >= supported_speeds[i])
break;
}
acpi_speed = supported_speeds[i - 1];
acpi_speed = i < ARRAY_SIZE(supported_speeds) ? supported_speeds[i] : 0;
switch (acpi_speed) {
case 100000:
case I2C_MAX_STANDARD_MODE_FREQ:
return speed100k;
case 400000:
case I2C_MAX_FAST_MODE_FREQ:
return speed400k;
case 1000000:
case I2C_MAX_FAST_MODE_PLUS_FREQ:
return speed1000k;
case 1400000:
case I2C_MAX_TURBO_MODE_FREQ:
return speed1400k;
case 3400000:
case I2C_MAX_HIGH_SPEED_MODE_FREQ:
return speed3400k;
default:
return speed400k;

2
drivers/i2c/busses/i2c-aspeed.c
View File

@ -997,7 +997,7 @@ static int aspeed_i2c_probe_bus(struct platform_device *pdev)
if (ret < 0) {
dev_err(&pdev->dev,
"Could not read bus-frequency property\n");
bus->bus_frequency = 100000;
bus->bus_frequency = I2C_MAX_STANDARD_MODE_FREQ;
}
match = of_match_node(aspeed_i2c_bus_of_table, pdev->dev.of_node);

4
drivers/i2c/busses/i2c-axxia.c
View File

@ -199,7 +199,7 @@ static int axxia_i2c_init(struct axxia_i2c_dev *idev)
/* Enable Master Mode */
writel(0x1, idev->base + GLOBAL_CONTROL);
if (idev->bus_clk_rate <= 100000) {
if (idev->bus_clk_rate <= I2C_MAX_STANDARD_MODE_FREQ) {
/* Standard mode SCL 50/50, tSU:DAT = 250 ns */
t_high = divisor * 1 / 2;
t_low = divisor * 1 / 2;
@ -765,7 +765,7 @@ static int axxia_i2c_probe(struct platform_device *pdev)
of_property_read_u32(np, "clock-frequency", &idev->bus_clk_rate);
if (idev->bus_clk_rate == 0)
idev->bus_clk_rate = 100000; /* default clock rate */
idev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */
ret = clk_prepare_enable(idev->i2c_clk);
if (ret) {

14
drivers/i2c/busses/i2c-bcm-iproc.c
View File

@ -858,25 +858,25 @@ static int bcm_iproc_i2c_cfg_speed(struct bcm_iproc_i2c_dev *iproc_i2c)
if (ret < 0) {
dev_info(iproc_i2c->device,
"unable to interpret clock-frequency DT property\n");
bus_speed = 100000;
bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
}
if (bus_speed < 100000) {
if (bus_speed < I2C_MAX_STANDARD_MODE_FREQ) {
dev_err(iproc_i2c->device, "%d Hz bus speed not supported\n",
bus_speed);
dev_err(iproc_i2c->device,
"valid speeds are 100khz and 400khz\n");
return -EINVAL;
} else if (bus_speed < 400000) {
bus_speed = 100000;
} else if (bus_speed < I2C_MAX_FAST_MODE_FREQ) {
bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
} else {
bus_speed = 400000;
bus_speed = I2C_MAX_FAST_MODE_FREQ;
}
iproc_i2c->bus_speed = bus_speed;
val = iproc_i2c_rd_reg(iproc_i2c, TIM_CFG_OFFSET);
val &= ~BIT(TIM_CFG_MODE_400_SHIFT);
val |= (bus_speed == 400000) << TIM_CFG_MODE_400_SHIFT;
val |= (bus_speed == I2C_MAX_FAST_MODE_FREQ) << TIM_CFG_MODE_400_SHIFT;
iproc_i2c_wr_reg(iproc_i2c, TIM_CFG_OFFSET, val);
dev_info(iproc_i2c->device, "bus set to %u Hz\n", bus_speed);
@ -1029,7 +1029,7 @@ static int bcm_iproc_i2c_resume(struct device *dev)
/* configure to the desired bus speed */
val = iproc_i2c_rd_reg(iproc_i2c, TIM_CFG_OFFSET);
val &= ~BIT(TIM_CFG_MODE_400_SHIFT);
val |= (iproc_i2c->bus_speed == 400000) << TIM_CFG_MODE_400_SHIFT;
val |= (iproc_i2c->bus_speed == I2C_MAX_FAST_MODE_FREQ) << TIM_CFG_MODE_400_SHIFT;
iproc_i2c_wr_reg(iproc_i2c, TIM_CFG_OFFSET, val);
bcm_iproc_i2c_enable_disable(iproc_i2c, true);

8
drivers/i2c/busses/i2c-bcm-kona.c
View File

@ -722,16 +722,16 @@ static int bcm_kona_i2c_assign_bus_speed(struct bcm_kona_i2c_dev *dev)
}
switch (bus_speed) {
case 100000:
case I2C_MAX_STANDARD_MODE_FREQ:
dev->std_cfg = &std_cfg_table[BCM_SPD_100K];
break;
case 400000:
case I2C_MAX_FAST_MODE_FREQ:
dev->std_cfg = &std_cfg_table[BCM_SPD_400K];
break;
case 1000000:
case I2C_MAX_FAST_MODE_PLUS_FREQ:
dev->std_cfg = &std_cfg_table[BCM_SPD_1MHZ];
break;
case 3400000:
case I2C_MAX_HIGH_SPEED_MODE_FREQ:
/* Send mastercode at 100k */
dev->std_cfg = &std_cfg_table[BCM_SPD_100K];
dev->hs_cfg = &hs_cfg_table[BCM_SPD_3P4MHZ];

2
drivers/i2c/busses/i2c-bcm2835.c
View File

@ -439,7 +439,7 @@ static int bcm2835_i2c_probe(struct platform_device *pdev)
if (ret < 0) {
dev_warn(&pdev->dev,
"Could not read clock-frequency property\n");
bus_clk_rate = 100000;
bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ;
}
ret = clk_set_rate_exclusive(i2c_dev->bus_clk, bus_clk_rate);

7
drivers/i2c/busses/i2c-cadence.c
View File

@ -104,9 +104,6 @@
#define DRIVER_NAME "cdns-i2c"
#define CDNS_I2C_SPEED_MAX 400000
#define CDNS_I2C_SPEED_DEFAULT 100000
#define CDNS_I2C_DIVA_MAX 4
#define CDNS_I2C_DIVB_MAX 64
@ -949,8 +946,8 @@ static int cdns_i2c_probe(struct platform_device *pdev)
ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&id->i2c_clk);
if (ret || (id->i2c_clk > CDNS_I2C_SPEED_MAX))
id->i2c_clk = CDNS_I2C_SPEED_DEFAULT;
if (ret || (id->i2c_clk > I2C_MAX_FAST_MODE_FREQ))
id->i2c_clk = I2C_MAX_STANDARD_MODE_FREQ;
cdns_i2c_writereg(CDNS_I2C_CR_ACK_EN | CDNS_I2C_CR_NEA | CDNS_I2C_CR_MS,
CDNS_I2C_CR_OFFSET);

37
drivers/i2c/busses/i2c-designware-platdrv.c
View File

@ -99,16 +99,16 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt, &fs_ht);
switch (t->bus_freq_hz) {
case 100000:
case I2C_MAX_STANDARD_MODE_FREQ:
dev->sda_hold_time = ss_ht;
break;
case 1000000:
case I2C_MAX_FAST_MODE_PLUS_FREQ:
dev->sda_hold_time = fp_ht;
break;
case 3400000:
case I2C_MAX_HIGH_SPEED_MODE_FREQ:
dev->sda_hold_time = hs_ht;
break;
case 400000:
case I2C_MAX_FAST_MODE_FREQ:
default:
dev->sda_hold_time = fs_ht;
break;
@ -198,10 +198,10 @@ static void i2c_dw_configure_master(struct dw_i2c_dev *dev)
dev->mode = DW_IC_MASTER;
switch (t->bus_freq_hz) {
case 100000:
case I2C_MAX_STANDARD_MODE_FREQ:
dev->master_cfg |= DW_IC_CON_SPEED_STD;
break;
case 3400000:
case I2C_MAX_HIGH_SPEED_MODE_FREQ:
dev->master_cfg |= DW_IC_CON_SPEED_HIGH;
break;
default:
@ -227,6 +227,13 @@ static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev)
pm_runtime_put_noidle(dev->dev);
}
static const u32 supported_speeds[] = {
I2C_MAX_HIGH_SPEED_MODE_FREQ,
I2C_MAX_FAST_MODE_PLUS_FREQ,
I2C_MAX_FAST_MODE_FREQ,
I2C_MAX_STANDARD_MODE_FREQ,
};
static int dw_i2c_plat_probe(struct platform_device *pdev)
{
struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev);
@ -236,9 +243,6 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
u32 acpi_speed;
struct resource *mem;
int i, irq, ret;
static const int supported_speeds[] = {
0, 100000, 400000, 1000000, 3400000
};
irq = platform_get_irq(pdev, 0);
if (irq < 0)
@ -274,11 +278,11 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
* Some DSTDs use a non standard speed, round down to the lowest
* standard speed.
*/
for (i = 1; i < ARRAY_SIZE(supported_speeds); i++) {
if (acpi_speed < supported_speeds[i])
for (i = 0; i < ARRAY_SIZE(supported_speeds); i++) {
if (acpi_speed >= supported_speeds[i])
break;
}
acpi_speed = supported_speeds[i - 1];
acpi_speed = i < ARRAY_SIZE(supported_speeds) ? supported_speeds[i] : 0;
/*
* Find bus speed from the "clock-frequency" device property, ACPI
@ -289,7 +293,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
else if (acpi_speed || t->bus_freq_hz)
t->bus_freq_hz = max(t->bus_freq_hz, acpi_speed);
else
t->bus_freq_hz = 400000;
t->bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
dev->flags |= (uintptr_t)device_get_match_data(&pdev->dev);
@ -303,8 +307,11 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
* Only standard mode at 100kHz, fast mode at 400kHz,
* fast mode plus at 1MHz and high speed mode at 3.4MHz are supported.
*/
if (t->bus_freq_hz != 100000 && t->bus_freq_hz != 400000 &&
t->bus_freq_hz != 1000000 && t->bus_freq_hz != 3400000) {
for (i = 0; i < ARRAY_SIZE(supported_speeds); i++) {
if (t->bus_freq_hz == supported_speeds[i])
break;
}
if (i == ARRAY_SIZE(supported_speeds)) {
dev_err(&pdev->dev,
"%d Hz is unsupported, only 100kHz, 400kHz, 1MHz and 3.4MHz are supported\n",
t->bus_freq_hz);

3
drivers/i2c/busses/i2c-digicolor.c
View File

@ -18,7 +18,6 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#define DEFAULT_FREQ 100000
#define TIMEOUT_MS 100
#define II_CONTROL 0x0
@ -300,7 +299,7 @@ static int dc_i2c_probe(struct platform_device *pdev)
if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&i2c->frequency))
i2c->frequency = DEFAULT_FREQ;
i2c->frequency = I2C_MAX_STANDARD_MODE_FREQ;
i2c->dev = &pdev->dev;
platform_set_drvdata(pdev, i2c);

12
drivers/i2c/busses/i2c-diolan-u2c.c
View File

@ -64,8 +64,6 @@
#define U2C_I2C_SPEED_2KHZ 242 /* 2 kHz, minimum speed */
#define U2C_I2C_SPEED(f) ((DIV_ROUND_UP(1000000, (f)) - 10) / 2 + 1)
#define U2C_I2C_FREQ_FAST 400000
#define U2C_I2C_FREQ_STD 100000
#define U2C_I2C_FREQ(s) (1000000 / (2 * (s - 1) + 10))
#define DIOLAN_USB_TIMEOUT 100 /* in ms */
@ -87,7 +85,7 @@ struct i2c_diolan_u2c {
int ocount; /* Number of enqueued messages */
};
static uint frequency = U2C_I2C_FREQ_STD; /* I2C clock frequency in Hz */
static uint frequency = I2C_MAX_STANDARD_MODE_FREQ; /* I2C clock frequency in Hz */
module_param(frequency, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(frequency, "I2C clock frequency in hertz");
@ -299,12 +297,12 @@ static int diolan_init(struct i2c_diolan_u2c *dev)
{
int speed, ret;
if (frequency >= 200000) {
if (frequency >= 2 * I2C_MAX_STANDARD_MODE_FREQ) {
speed = U2C_I2C_SPEED_FAST;
frequency = U2C_I2C_FREQ_FAST;
} else if (frequency >= 100000 || frequency == 0) {
frequency = I2C_MAX_FAST_MODE_FREQ;
} else if (frequency >= I2C_MAX_STANDARD_MODE_FREQ || frequency == 0) {
speed = U2C_I2C_SPEED_STD;
frequency = U2C_I2C_FREQ_STD;
frequency = I2C_MAX_STANDARD_MODE_FREQ;
} else {
speed = U2C_I2C_SPEED(frequency);
if (speed > U2C_I2C_SPEED_2KHZ)

2
drivers/i2c/busses/i2c-efm32.c
View File

@ -388,7 +388,7 @@ static int efm32_i2c_probe(struct platform_device *pdev)
if (!ret) {
dev_dbg(&pdev->dev, "using frequency %u\n", frequency);
} else {
frequency = 100000;
frequency = I2C_MAX_STANDARD_MODE_FREQ;
dev_info(&pdev->dev, "defaulting to 100 kHz\n");
}
ddata->frequency = frequency;

18
drivers/i2c/busses/i2c-exynos5.c
View File

@ -164,13 +164,6 @@
#define HSI2C_MASTER_ID(x) ((x & 0xff) << 24)
#define MASTER_ID(x) ((x & 0x7) + 0x08)
/*
* Controller operating frequency, timing values for operation
* are calculated against this frequency
*/
#define HSI2C_HS_TX_CLOCK 1000000
#define HSI2C_FS_TX_CLOCK 100000
#define EXYNOS5_I2C_TIMEOUT (msecs_to_jiffies(100))
enum i2c_type_exynos {
@ -264,6 +257,9 @@ static void exynos5_i2c_clr_pend_irq(struct exynos5_i2c *i2c)
* exynos5_i2c_set_timing: updates the registers with appropriate
* timing values calculated
*
* Timing values for operation are calculated against either 100kHz
* or 1MHz controller operating frequency.
*
* Returns 0 on success, -EINVAL if the cycle length cannot
* be calculated.
*/
@ -281,7 +277,7 @@ static int exynos5_i2c_set_timing(struct exynos5_i2c *i2c, bool hs_timings)
unsigned int t_ftl_cycle;
unsigned int clkin = clk_get_rate(i2c->clk);
unsigned int op_clk = hs_timings ? i2c->op_clock :
(i2c->op_clock >= HSI2C_HS_TX_CLOCK) ? HSI2C_FS_TX_CLOCK :
(i2c->op_clock >= I2C_MAX_FAST_MODE_PLUS_FREQ) ? I2C_MAX_STANDARD_MODE_FREQ :
i2c->op_clock;
int div, clk_cycle, temp;
@ -353,7 +349,7 @@ static int exynos5_hsi2c_clock_setup(struct exynos5_i2c *i2c)
/* always set Fast Speed timings */
int ret = exynos5_i2c_set_timing(i2c, false);
if (ret < 0 || i2c->op_clock < HSI2C_HS_TX_CLOCK)
if (ret < 0 || i2c->op_clock < I2C_MAX_FAST_MODE_PLUS_FREQ)
return ret;
return exynos5_i2c_set_timing(i2c, true);
@ -376,7 +372,7 @@ static void exynos5_i2c_init(struct exynos5_i2c *i2c)
i2c->regs + HSI2C_CTL);
writel(HSI2C_TRAILING_COUNT, i2c->regs + HSI2C_TRAILIG_CTL);
if (i2c->op_clock >= HSI2C_HS_TX_CLOCK) {
if (i2c->op_clock >= I2C_MAX_FAST_MODE_PLUS_FREQ) {
writel(HSI2C_MASTER_ID(MASTER_ID(i2c->adap.nr)),
i2c->regs + HSI2C_ADDR);
i2c_conf |= HSI2C_HS_MODE;
@ -748,7 +744,7 @@ static int exynos5_i2c_probe(struct platform_device *pdev)
return -ENOMEM;
if (of_property_read_u32(np, "clock-frequency", &i2c->op_clock))
i2c->op_clock = HSI2C_FS_TX_CLOCK;
i2c->op_clock = I2C_MAX_STANDARD_MODE_FREQ;
strlcpy(i2c->adap.name, "exynos5-i2c", sizeof(i2c->adap.name));
i2c->adap.owner = THIS_MODULE;

10
drivers/i2c/busses/i2c-hix5hd2.c
View File

@ -68,8 +68,6 @@
#define I2C_ARBITRATE_INTR BIT(1)
#define I2C_OVER_INTR BIT(0)
#define HIX5I2C_MAX_FREQ 400000 /* 400k */
enum hix5hd2_i2c_state {
HIX5I2C_STAT_RW_ERR = -1,
HIX5I2C_STAT_INIT,
@ -400,12 +398,12 @@ static int hix5hd2_i2c_probe(struct platform_device *pdev)
if (of_property_read_u32(np, "clock-frequency", &freq)) {
/* use 100k as default value */
priv->freq = 100000;
priv->freq = I2C_MAX_STANDARD_MODE_FREQ;
} else {
if (freq > HIX5I2C_MAX_FREQ) {
priv->freq = HIX5I2C_MAX_FREQ;
if (freq > I2C_MAX_FAST_MODE_FREQ) {
priv->freq = I2C_MAX_FAST_MODE_FREQ;
dev_warn(priv->dev, "use max freq %d instead\n",
HIX5I2C_MAX_FREQ);
I2C_MAX_FAST_MODE_FREQ);
} else {
priv->freq = freq;
}

4
drivers/i2c/busses/i2c-img-scb.c
View File

@ -304,7 +304,7 @@ static struct img_i2c_timings timings[] = {
/* Standard mode */
{
.name = "standard",
.max_bitrate = 100000,
.max_bitrate = I2C_MAX_STANDARD_MODE_FREQ,
.tckh = 4000,
.tckl = 4700,
.tsdh = 4700,
@ -316,7 +316,7 @@ static struct img_i2c_timings timings[] = {
/* Fast mode */
{
.name = "fast",
.max_bitrate = 400000,
.max_bitrate = I2C_MAX_FAST_MODE_FREQ,
.tckh = 600,
.tckl = 1300,
.tsdh = 600,

16
drivers/i2c/busses/i2c-imx-lpi2c.c
View File

@ -75,12 +75,6 @@
#define I2C_CLK_RATIO 2
#define CHUNK_DATA 256
#define LPI2C_DEFAULT_RATE 100000
#define STARDARD_MAX_BITRATE 400000
#define FAST_MAX_BITRATE 1000000
#define FAST_PLUS_MAX_BITRATE 3400000
#define HIGHSPEED_MAX_BITRATE 5000000
#define I2C_PM_TIMEOUT 10 /* ms */
enum lpi2c_imx_mode {
@ -152,13 +146,13 @@ static void lpi2c_imx_set_mode(struct lpi2c_imx_struct *lpi2c_imx)
unsigned int bitrate = lpi2c_imx->bitrate;
enum lpi2c_imx_mode mode;
if (bitrate < STARDARD_MAX_BITRATE)
if (bitrate < I2C_MAX_FAST_MODE_FREQ)
mode = STANDARD;
else if (bitrate < FAST_MAX_BITRATE)
else if (bitrate < I2C_MAX_FAST_MODE_PLUS_FREQ)
mode = FAST;
else if (bitrate < FAST_PLUS_MAX_BITRATE)
else if (bitrate < I2C_MAX_HIGH_SPEED_MODE_FREQ)
mode = FAST_PLUS;
else if (bitrate < HIGHSPEED_MAX_BITRATE)
else if (bitrate < I2C_MAX_ULTRA_FAST_MODE_FREQ)
mode = HS;
else
mode = ULTRA_FAST;
@ -578,7 +572,7 @@ static int lpi2c_imx_probe(struct platform_device *pdev)
ret = of_property_read_u32(pdev->dev.of_node,
"clock-frequency", &lpi2c_imx->bitrate);
if (ret)
lpi2c_imx->bitrate = LPI2C_DEFAULT_RATE;
lpi2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ;
ret = devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr, 0,
pdev->name, lpi2c_imx);

5
drivers/i2c/busses/i2c-imx.c
View File

@ -50,9 +50,6 @@
/* This will be the driver name the kernel reports */
#define DRIVER_NAME "imx-i2c"
/* Default value */
#define IMX_I2C_BIT_RATE 100000 /* 100kHz */
/*
* Enable DMA if transfer byte size is bigger than this threshold.
* As the hardware request, it must bigger than 4 bytes.\
@ -1201,7 +1198,7 @@ static int i2c_imx_probe(struct platform_device *pdev)
goto rpm_disable;
/* Set up clock divider */
i2c_imx->bitrate = IMX_I2C_BIT_RATE;
i2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ;
ret = of_property_read_u32(pdev->dev.of_node,
"clock-frequency", &i2c_imx->bitrate);
if (ret < 0 && pdata && pdata->bitrate)

6
drivers/i2c/busses/i2c-lpc2k.c
View File

@ -396,7 +396,7 @@ static int i2c_lpc2k_probe(struct platform_device *pdev)
ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&bus_clk_rate);
if (ret)
bus_clk_rate = 100000; /* 100 kHz default clock rate */
bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ;
clkrate = clk_get_rate(i2c->clk);
if (clkrate == 0) {
@ -407,9 +407,9 @@ static int i2c_lpc2k_probe(struct platform_device *pdev)
/* Setup I2C dividers to generate clock with proper duty cycle */
clkrate = clkrate / bus_clk_rate;
if (bus_clk_rate <= 100000)
if (bus_clk_rate <= I2C_MAX_STANDARD_MODE_FREQ)
scl_high = (clkrate * I2C_STD_MODE_DUTY) / 100;
else if (bus_clk_rate <= 400000)
else if (bus_clk_rate <= I2C_MAX_FAST_MODE_FREQ)
scl_high = (clkrate * I2C_FAST_MODE_DUTY) / 100;
else
scl_high = (clkrate * I2C_FAST_MODE_PLUS_DUTY) / 100;

21
drivers/i2c/busses/i2c-mt65xx.c
View File

@ -56,9 +56,6 @@
#define I2C_DMA_4G_MODE 0x0001
#define I2C_DEFAULT_CLK_DIV 5
#define I2C_DEFAULT_SPEED 100000 /* hz */
#define MAX_FS_MODE_SPEED 400000
#define MAX_HS_MODE_SPEED 3400000
#define MAX_SAMPLE_CNT_DIV 8
#define MAX_STEP_CNT_DIV 64
#define MAX_HS_STEP_CNT_DIV 8
@ -450,10 +447,10 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
unsigned int best_mul;
unsigned int cnt_mul;
if (target_speed > MAX_HS_MODE_SPEED)
target_speed = MAX_HS_MODE_SPEED;
if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
if (target_speed > MAX_FS_MODE_SPEED)
if (target_speed > I2C_MAX_FAST_MODE_FREQ)
max_step_cnt = MAX_HS_STEP_CNT_DIV;
else
max_step_cnt = MAX_STEP_CNT_DIV;
@ -514,9 +511,9 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
clk_src = parent_clk / i2c->clk_src_div;
target_speed = i2c->speed_hz;
if (target_speed > MAX_FS_MODE_SPEED) {
if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
/* Set master code speed register */
ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED,
ret = mtk_i2c_calculate_speed(i2c, clk_src, I2C_MAX_FAST_MODE_FREQ,
&l_step_cnt, &l_sample_cnt);
if (ret < 0)
return ret;
@ -581,7 +578,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
if ((i2c->speed_hz > I2C_MAX_FAST_MODE_FREQ) || (left_num >= 1))
control_reg |= I2C_CONTROL_RS;
if (i2c->op == I2C_MASTER_WRRD)
@ -590,7 +587,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
/* set start condition */
if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
if (i2c->speed_hz <= I2C_MAX_STANDARD_MODE_FREQ)
mtk_i2c_writew(i2c, I2C_ST_START_CON, OFFSET_EXT_CONF);
else
mtk_i2c_writew(i2c, I2C_FS_START_CON, OFFSET_EXT_CONF);
@ -798,7 +795,7 @@ static int mtk_i2c_transfer(struct i2c_adapter *adap,
}
}
if (i2c->auto_restart && num >= 2 && i2c->speed_hz > MAX_FS_MODE_SPEED)
if (i2c->auto_restart && num >= 2 && i2c->speed_hz > I2C_MAX_FAST_MODE_FREQ)
/* ignore the first restart irq after the master code,
* otherwise the first transfer will be discarded.
*/
@ -893,7 +890,7 @@ static int mtk_i2c_parse_dt(struct device_node *np, struct mtk_i2c *i2c)
ret = of_property_read_u32(np, "clock-frequency", &i2c->speed_hz);
if (ret < 0)
i2c->speed_hz = I2C_DEFAULT_SPEED;
i2c->speed_hz = I2C_MAX_STANDARD_MODE_FREQ;
ret = of_property_read_u32(np, "clock-div", &i2c->clk_src_div);
if (ret < 0)

2
drivers/i2c/busses/i2c-mt7621.c
View File

@ -300,7 +300,7 @@ static int mtk_i2c_probe(struct platform_device *pdev)
if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&i2c->bus_freq))
i2c->bus_freq = 100000;
i2c->bus_freq = I2C_MAX_STANDARD_MODE_FREQ;
if (i2c->bus_freq == 0) {
dev_warn(i2c->dev, "clock-frequency 0 not supported\n");

6
drivers/i2c/busses/i2c-mv64xxx.c
View File

@ -810,7 +810,7 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
tclk = clk_get_rate(drv_data->clk);
if (of_property_read_u32(np, "clock-frequency", &bus_freq))
bus_freq = 100000; /* 100kHz by default */
bus_freq = I2C_MAX_STANDARD_MODE_FREQ; /* 100kHz by default */
if (of_device_is_compatible(np, "allwinner,sun4i-a10-i2c") ||
of_device_is_compatible(np, "allwinner,sun6i-a31-i2c"))
@ -846,14 +846,14 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
if (of_device_is_compatible(np, "marvell,mv78230-i2c")) {
drv_data->offload_enabled = true;
/* The delay is only needed in standard mode (100kHz) */
if (bus_freq <= 100000)
if (bus_freq <= I2C_MAX_STANDARD_MODE_FREQ)
drv_data->errata_delay = true;
}
if (of_device_is_compatible(np, "marvell,mv78230-a0-i2c")) {
drv_data->offload_enabled = false;
/* The delay is only needed in standard mode (100kHz) */
if (bus_freq <= 100000)
if (bus_freq <= I2C_MAX_STANDARD_MODE_FREQ)
drv_data->errata_delay = true;
}

4
drivers/i2c/busses/i2c-mxs.c
View File

@ -731,7 +731,7 @@ static void mxs_i2c_derive_timing(struct mxs_i2c_dev *i2c, uint32_t speed)
* This is compensated for by subtracting the respective constants
* from the values written to the timing registers.
*/
if (speed > 100000) {
if (speed > I2C_MAX_STANDARD_MODE_FREQ) {
/* fast mode */
low_count = DIV_ROUND_CLOSEST(divider * 13, (13 + 6));
high_count = DIV_ROUND_CLOSEST(divider * 6, (13 + 6));
@ -769,7 +769,7 @@ static int mxs_i2c_get_ofdata(struct mxs_i2c_dev *i2c)
ret = of_property_read_u32(node, "clock-frequency", &speed);
if (ret) {
dev_warn(dev, "No I2C speed selected, using 100kHz\n");
speed = 100000;
speed = I2C_MAX_STANDARD_MODE_FREQ;
}
mxs_i2c_derive_timing(i2c, speed);

8
drivers/i2c/busses/i2c-nomadik.c
View File

@ -396,7 +396,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
* 2 whereas it is 3 for fast and fastplus mode of
* operation. TODO - high speed support.
*/
div = (dev->clk_freq > 100000) ? 3 : 2;
div = (dev->clk_freq > I2C_MAX_STANDARD_MODE_FREQ) ? 3 : 2;
/*
* generate the mask for baud rate counters. The controller
@ -420,7 +420,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
if (dev->sm > I2C_FREQ_MODE_FAST) {
dev_err(&dev->adev->dev,
"do not support this mode defaulting to std. mode\n");
brcr2 = i2c_clk/(100000 * 2) & 0xffff;
brcr2 = i2c_clk / (I2C_MAX_STANDARD_MODE_FREQ * 2) & 0xffff;
writel((brcr1 | brcr2), dev->virtbase + I2C_BRCR);
writel(I2C_FREQ_MODE_STANDARD << 4,
dev->virtbase + I2C_CR);
@ -949,10 +949,10 @@ static void nmk_i2c_of_probe(struct device_node *np,
{
/* Default to 100 kHz if no frequency is given in the node */
if (of_property_read_u32(np, "clock-frequency", &nmk->clk_freq))
nmk->clk_freq = 100000;
nmk->clk_freq = I2C_MAX_STANDARD_MODE_FREQ;
/* This driver only supports 'standard' and 'fast' modes of operation. */
if (nmk->clk_freq <= 100000)
if (nmk->clk_freq <= I2C_MAX_STANDARD_MODE_FREQ)
nmk->sm = I2C_FREQ_MODE_STANDARD;
else
nmk->sm = I2C_FREQ_MODE_FAST;

2
drivers/i2c/busses/i2c-omap.c
View File

@ -1380,7 +1380,7 @@ omap_i2c_probe(struct platform_device *pdev)
match = of_match_device(of_match_ptr(omap_i2c_of_match), &pdev->dev);
if (match) {
u32 freq = 100000; /* default to 100000 Hz */
u32 freq = I2C_MAX_STANDARD_MODE_FREQ;
pdata = match->data;
omap->flags = pdata->flags;

9
drivers/i2c/busses/i2c-owl.c
View File

@ -87,9 +87,6 @@
#define OWL_I2C_MAX_RETRIES 50
#define OWL_I2C_DEF_SPEED_HZ 100000
#define OWL_I2C_MAX_SPEED_HZ 400000
struct owl_i2c_dev {
struct i2c_adapter adap;
struct i2c_msg *msg;
@ -419,11 +416,11 @@ static int owl_i2c_probe(struct platform_device *pdev)
if (of_property_read_u32(dev->of_node, "clock-frequency",
&i2c_dev->bus_freq))
i2c_dev->bus_freq = OWL_I2C_DEF_SPEED_HZ;
i2c_dev->bus_freq = I2C_MAX_STANDARD_MODE_FREQ;
/* We support only frequencies of 100k and 400k for now */
if (i2c_dev->bus_freq != OWL_I2C_DEF_SPEED_HZ &&
i2c_dev->bus_freq != OWL_I2C_MAX_SPEED_HZ) {
if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ &&
i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ) {
dev_err(dev, "invalid clock-frequency %d\n", i2c_dev->bus_freq);
return -EINVAL;
}

11
drivers/i2c/busses/i2c-qup.c
View File

@ -136,13 +136,8 @@
*/
#define TOUT_MIN 2
/* I2C Frequency Modes */
#define I2C_STANDARD_FREQ 100000
#define I2C_FAST_MODE_FREQ 400000
#define I2C_FAST_MODE_PLUS_FREQ 1000000
/* Default values. Use these if FW query fails */
#define DEFAULT_CLK_FREQ I2C_STANDARD_FREQ
#define DEFAULT_CLK_FREQ I2C_MAX_STANDARD_MODE_FREQ
#define DEFAULT_SRC_CLK 20000000
/*
@ -1756,7 +1751,7 @@ static int qup_i2c_probe(struct platform_device *pdev)
nodma:
/* We support frequencies up to FAST Mode Plus (1MHz) */
if (!clk_freq || clk_freq > I2C_FAST_MODE_PLUS_FREQ) {
if (!clk_freq || clk_freq > I2C_MAX_FAST_MODE_PLUS_FREQ) {
dev_err(qup->dev, "clock frequency not supported %d\n",
clk_freq);
return -EINVAL;
@ -1861,7 +1856,7 @@ nodma:
qup->in_fifo_sz = qup->in_blk_sz * (2 << size);
hs_div = 3;
if (clk_freq <= I2C_STANDARD_FREQ) {
if (clk_freq <= I2C_MAX_STANDARD_MODE_FREQ) {
fs_div = ((src_clk_freq / clk_freq) / 2) - 3;
qup->clk_ctl = (hs_div << 8) | (fs_div & 0xff);
} else {

6
drivers/i2c/busses/i2c-riic.c
View File

@ -287,10 +287,10 @@ static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t)
pm_runtime_get_sync(riic->adapter.dev.parent);
if (t->bus_freq_hz > 400000) {
if (t->bus_freq_hz > I2C_MAX_FAST_MODE_FREQ) {
dev_err(&riic->adapter.dev,
"unsupported bus speed (%dHz). 400000 max\n",
t->bus_freq_hz);
"unsupported bus speed (%dHz). %d max\n",
t->bus_freq_hz, I2C_MAX_FAST_MODE_FREQ);
ret = -EINVAL;
goto out;
}

12
drivers/i2c/busses/i2c-rk3x.c
View File

@ -539,9 +539,9 @@ out:
*/
static const struct i2c_spec_values *rk3x_i2c_get_spec(unsigned int speed)
{
if (speed <= 100000)
if (speed <= I2C_MAX_STANDARD_MODE_FREQ)
return &standard_mode_spec;
else if (speed <= 400000)
else if (speed <= I2C_MAX_FAST_MODE_FREQ)
return &fast_mode_spec;
else
return &fast_mode_plus_spec;
@ -578,8 +578,8 @@ static int rk3x_i2c_v0_calc_timings(unsigned long clk_rate,
int ret = 0;
/* Only support standard-mode and fast-mode */
if (WARN_ON(t->bus_freq_hz > 400000))
t->bus_freq_hz = 400000;
if (WARN_ON(t->bus_freq_hz > I2C_MAX_FAST_MODE_FREQ))
t->bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
/* prevent scl_rate_khz from becoming 0 */
if (WARN_ON(t->bus_freq_hz < 1000))
@ -758,8 +758,8 @@ static int rk3x_i2c_v1_calc_timings(unsigned long clk_rate,
int ret = 0;
/* Support standard-mode, fast-mode and fast-mode plus */
if (WARN_ON(t->bus_freq_hz > 1000000))
t->bus_freq_hz = 1000000;
if (WARN_ON(t->bus_freq_hz > I2C_MAX_FAST_MODE_PLUS_FREQ))
t->bus_freq_hz = I2C_MAX_FAST_MODE_PLUS_FREQ;
/* prevent scl_rate_khz from becoming 0 */
if (WARN_ON(t->bus_freq_hz < 1000))

4
drivers/i2c/busses/i2c-s3c2410.c
View File

@ -835,11 +835,11 @@ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got)
int freq;
i2c->clkrate = clkin;
clkin /= 1000; /* clkin now in KHz */
clkin /= 1000; /* clkin now in KHz */
dev_dbg(i2c->dev, "pdata desired frequency %lu\n", pdata->frequency);
target_frequency = pdata->frequency ? pdata->frequency : 100000;
target_frequency = pdata->frequency ?: I2C_MAX_STANDARD_MODE_FREQ;
target_frequency /= 1000; /* Target frequency now in KHz */

9
drivers/i2c/busses/i2c-sh_mobile.c
View File

@ -145,9 +145,6 @@ struct sh_mobile_dt_config {
#define IIC_FLAG_HAS_ICIC67 (1 << 0)
#define STANDARD_MODE 100000
#define FAST_MODE 400000
/* Register offsets */
#define ICDR 0x00
#define ICCR 0x04
@ -270,11 +267,11 @@ static int sh_mobile_i2c_init(struct sh_mobile_i2c_data *pd)
i2c_clk_khz = clk_get_rate(pd->clk) / 1000 / pd->clks_per_count;
if (pd->bus_speed == STANDARD_MODE) {
if (pd->bus_speed == I2C_MAX_STANDARD_MODE_FREQ) {
tLOW = 47; /* tLOW = 4.7 us */
tHIGH = 40; /* tHD;STA = tHIGH = 4.0 us */
tf = 3; /* tf = 0.3 us */
} else if (pd->bus_speed == FAST_MODE) {
} else if (pd->bus_speed == I2C_MAX_FAST_MODE_FREQ) {
tLOW = 13; /* tLOW = 1.3 us */
tHIGH = 6; /* tHD;STA = tHIGH = 0.6 us */
tf = 3; /* tf = 0.3 us */
@ -851,7 +848,7 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
return PTR_ERR(pd->reg);
ret = of_property_read_u32(dev->dev.of_node, "clock-frequency", &bus_speed);
pd->bus_speed = (ret || !bus_speed) ? STANDARD_MODE : bus_speed;
pd->bus_speed = (ret || !bus_speed) ? I2C_MAX_STANDARD_MODE_FREQ : bus_speed;
pd->clks_per_count = 1;
/* Newer variants come with two new bits in ICIC */

3
drivers/i2c/busses/i2c-sirf.c
View File

@ -62,7 +62,6 @@
#define SIRFSOC_I2C_STOP BIT(6)
#define SIRFSOC_I2C_START BIT(7)
#define SIRFSOC_I2C_DEFAULT_SPEED 100000
#define SIRFSOC_I2C_ERR_NOACK 1
#define SIRFSOC_I2C_ERR_TIMEOUT 2
@ -353,7 +352,7 @@ static int i2c_sirfsoc_probe(struct platform_device *pdev)
err = of_property_read_u32(pdev->dev.of_node,
"clock-frequency", &bitrate);
if (err < 0)
bitrate = SIRFSOC_I2C_DEFAULT_SPEED;
bitrate = I2C_MAX_STANDARD_MODE_FREQ;
/*
* Due to some hardware design issues, we need to tune the formula.

9
drivers/i2c/busses/i2c-sprd.c
View File

@ -337,9 +337,9 @@ static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq)
writel(div1, i2c_dev->base + ADDR_DVD1);
/* Start hold timing = hold time(us) * source clock */
if (freq == 400000)
if (freq == I2C_MAX_FAST_MODE_FREQ)
writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD);
else if (freq == 100000)
else if (freq == I2C_MAX_STANDARD_MODE_FREQ)
writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD);
}
@ -502,7 +502,7 @@ static int sprd_i2c_probe(struct platform_device *pdev)
snprintf(i2c_dev->adap.name, sizeof(i2c_dev->adap.name),
"%s", "sprd-i2c");
i2c_dev->bus_freq = 100000;
i2c_dev->bus_freq = I2C_MAX_STANDARD_MODE_FREQ;
i2c_dev->adap.owner = THIS_MODULE;
i2c_dev->dev = dev;
i2c_dev->adap.retries = 3;
@ -516,7 +516,8 @@ static int sprd_i2c_probe(struct platform_device *pdev)
i2c_dev->bus_freq = prop;
/* We only support 100k and 400k now, otherwise will return error. */
if (i2c_dev->bus_freq != 100000 && i2c_dev->bus_freq != 400000)
if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ &&
i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ)
return -EINVAL;
ret = sprd_i2c_clk_init(i2c_dev);

6
drivers/i2c/busses/i2c-st.c
View File

@ -213,7 +213,7 @@ static inline void st_i2c_clr_bits(void __iomem *reg, u32 mask)
*/
static struct st_i2c_timings i2c_timings[] = {
[I2C_MODE_STANDARD] = {
.rate = 100000,
.rate = I2C_MAX_STANDARD_MODE_FREQ,
.rep_start_hold = 4400,
.rep_start_setup = 5170,
.start_hold = 4400,
@ -222,7 +222,7 @@ static struct st_i2c_timings i2c_timings[] = {
.bus_free_time = 5170,
},
[I2C_MODE_FAST] = {
.rate = 400000,
.rate = I2C_MAX_FAST_MODE_FREQ,
.rep_start_hold = 660,
.rep_start_setup = 660,
.start_hold = 660,
@ -835,7 +835,7 @@ static int st_i2c_probe(struct platform_device *pdev)
i2c_dev->mode = I2C_MODE_STANDARD;
ret = of_property_read_u32(np, "clock-frequency", &clk_rate);
if ((!ret) && (clk_rate == 400000))
if (!ret && (clk_rate == I2C_MAX_FAST_MODE_FREQ))
i2c_dev->mode = I2C_MODE_FAST;
i2c_dev->dev = &pdev->dev;

10
drivers/i2c/busses/i2c-stm32f4.c
View File

@ -232,10 +232,10 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev)
* In standard mode:
* t_scl_high = t_scl_low = CCR * I2C parent clk period
* So to reach 100 kHz, we have:
* CCR = I2C parent rate / 100 kHz >> 1
* CCR = I2C parent rate / (100 kHz * 2)
*
* For example with parent rate = 2 MHz:
* CCR = 2000000 / (100000 << 1) = 10
* CCR = 2000000 / (100000 * 2) = 10
* t_scl_high = t_scl_low = 10 * (1 / 2000000) = 5000 ns
* t_scl_high + t_scl_low = 10000 ns so 100 kHz is reached
*
@ -243,7 +243,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev)
* parent rate is not higher than 46 MHz . As a result val
* is at most 8 bits wide and so fits into the CCR bits [11:0].
*/
val = i2c_dev->parent_rate / (100000 << 1);
val = i2c_dev->parent_rate / (I2C_MAX_STANDARD_MODE_FREQ * 2);
} else {
/*
* In fast mode, we compute CCR with duty = 0 as with low
@ -263,7 +263,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev)
* parent rate is not higher than 46 MHz . As a result val
* is at most 6 bits wide and so fits into the CCR bits [11:0].
*/
val = DIV_ROUND_UP(i2c_dev->parent_rate, 400000 * 3);
val = DIV_ROUND_UP(i2c_dev->parent_rate, I2C_MAX_FAST_MODE_FREQ * 3);
/* Select Fast mode */
ccr |= STM32F4_I2C_CCR_FS;
@ -807,7 +807,7 @@ static int stm32f4_i2c_probe(struct platform_device *pdev)
i2c_dev->speed = STM32_I2C_SPEED_STANDARD;
ret = of_property_read_u32(np, "clock-frequency", &clk_rate);
if (!ret && clk_rate >= 400000)
if (!ret && clk_rate >= I2C_MAX_FAST_MODE_FREQ)
i2c_dev->speed = STM32_I2C_SPEED_FAST;
i2c_dev->dev = &pdev->dev;

6
drivers/i2c/busses/i2c-stu300.c
View File

@ -132,7 +132,7 @@ enum stu300_error {
#define NUM_ADDR_RESEND_ATTEMPTS 12
/* I2C clock speed, in Hz 0-400kHz*/
static unsigned int scl_frequency = 100000;
static unsigned int scl_frequency = I2C_MAX_STANDARD_MODE_FREQ;
module_param(scl_frequency, uint, 0644);
/**
@ -497,7 +497,7 @@ static int stu300_set_clk(struct stu300_dev *dev, unsigned long clkrate)
dev_dbg(&dev->pdev->dev, "Clock rate %lu Hz, I2C bus speed %d Hz "
"virtbase %p\n", clkrate, dev->speed, dev->virtbase);
if (dev->speed > 100000)
if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ)
/* Fast Mode I2C */
val = ((clkrate/dev->speed) - 9)/3 + 1;
else
@ -518,7 +518,7 @@ static int stu300_set_clk(struct stu300_dev *dev, unsigned long clkrate)
return -EINVAL;
}
if (dev->speed > 100000) {
if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ) {
/* CC6..CC0 */
stu300_wr8((val & I2C_CCR_CC_MASK) | I2C_CCR_FMSM,
dev->virtbase + I2C_CCR);

2
drivers/i2c/busses/i2c-sun6i-p2wi.c
View File

@ -186,7 +186,7 @@ static int p2wi_probe(struct platform_device *pdev)
struct device_node *np = dev->of_node;
struct device_node *childnp;
unsigned long parent_clk_freq;
u32 clk_freq = 100000;
u32 clk_freq = I2C_MAX_STANDARD_MODE_FREQ;
struct resource *r;
struct p2wi *p2wi;
u32 slave_addr;

6
drivers/i2c/busses/i2c-synquacer.c
View File

@ -67,10 +67,10 @@
/* STANDARD MODE frequency */
#define SYNQUACER_I2C_CLK_MASTER_STD(rate) \
DIV_ROUND_UP(DIV_ROUND_UP((rate), 100000) - 2, 2)
DIV_ROUND_UP(DIV_ROUND_UP((rate), I2C_MAX_STANDARD_MODE_FREQ) - 2, 2)
/* FAST MODE frequency */
#define SYNQUACER_I2C_CLK_MASTER_FAST(rate) \
DIV_ROUND_UP((DIV_ROUND_UP((rate), 400000) - 2) * 2, 3)
DIV_ROUND_UP((DIV_ROUND_UP((rate), I2C_MAX_FAST_MODE_FREQ) - 2) * 2, 3)
/* (clkrate <= 18000000) */
/* calculate the value of CS bits in CCR register on standard mode */
@ -602,7 +602,7 @@ static int synquacer_i2c_probe(struct platform_device *pdev)
i2c->adapter.nr = pdev->id;
init_completion(&i2c->completion);
if (bus_speed < 400000)
if (bus_speed < I2C_MAX_FAST_MODE_FREQ)
i2c->speed_khz = SYNQUACER_I2C_SPEED_SM;
else
i2c->speed_khz = SYNQUACER_I2C_SPEED_FM;

18
drivers/i2c/busses/i2c-tegra.c
View File

@ -123,10 +123,6 @@
#define I2C_THIGH_SHIFT 8
#define I2C_INTERFACE_TIMING_1 0x98
#define I2C_STANDARD_MODE 100000
#define I2C_FAST_MODE 400000
#define I2C_FAST_PLUS_MODE 1000000
/* Packet header size in bytes */
#define I2C_PACKET_HEADER_SIZE 12
@ -737,8 +733,8 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev, bool clk_reinit)
I2C_CLK_DIVISOR_STD_FAST_MODE_SHIFT;
i2c_writel(i2c_dev, clk_divisor, I2C_CLK_DIVISOR);
if (i2c_dev->bus_clk_rate > I2C_STANDARD_MODE &&
i2c_dev->bus_clk_rate <= I2C_FAST_PLUS_MODE) {
if (i2c_dev->bus_clk_rate > I2C_MAX_STANDARD_MODE_FREQ &&
i2c_dev->bus_clk_rate <= I2C_MAX_FAST_MODE_PLUS_FREQ) {
tlow = i2c_dev->hw->tlow_fast_fastplus_mode;
thigh = i2c_dev->hw->thigh_fast_fastplus_mode;
tsu_thd = i2c_dev->hw->setup_hold_time_fast_fast_plus_mode;
@ -1341,7 +1337,7 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev)
ret = of_property_read_u32(np, "clock-frequency",
&i2c_dev->bus_clk_rate);
if (ret)
i2c_dev->bus_clk_rate = 100000; /* default clock rate */
i2c_dev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */
multi_mode = of_property_read_bool(np, "multi-master");
i2c_dev->is_multimaster_mode = multi_mode;
@ -1640,12 +1636,12 @@ static int tegra_i2c_probe(struct platform_device *pdev)
}
}
if (i2c_dev->bus_clk_rate > I2C_FAST_MODE &&
i2c_dev->bus_clk_rate <= I2C_FAST_PLUS_MODE)
if (i2c_dev->bus_clk_rate > I2C_MAX_FAST_MODE_FREQ &&
i2c_dev->bus_clk_rate <= I2C_MAX_FAST_MODE_PLUS_FREQ)
i2c_dev->clk_divisor_non_hs_mode =
i2c_dev->hw->clk_divisor_fast_plus_mode;
else if (i2c_dev->bus_clk_rate > I2C_STANDARD_MODE &&
i2c_dev->bus_clk_rate <= I2C_FAST_MODE)
else if (i2c_dev->bus_clk_rate > I2C_MAX_STANDARD_MODE_FREQ &&
i2c_dev->bus_clk_rate <= I2C_MAX_FAST_MODE_FREQ)
i2c_dev->clk_divisor_non_hs_mode =
i2c_dev->hw->clk_divisor_fast_mode;
else

2
drivers/i2c/busses/i2c-thunderx-pcidrv.c
View File

@ -183,7 +183,7 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
thunder_i2c_clock_enable(dev, i2c);
ret = device_property_read_u32(dev, "clock-frequency", &i2c->twsi_freq);
if (ret)
i2c->twsi_freq = 100000;
i2c->twsi_freq = I2C_MAX_STANDARD_MODE_FREQ;
init_waitqueue_head(&i2c->queue);

6
drivers/i2c/busses/i2c-uniphier-f.c
View File

@ -73,8 +73,6 @@
#define UNIPHIER_FI2C_BYTE_WISE BIT(3)
#define UNIPHIER_FI2C_DEFER_STOP_COMP BIT(4)
#define UNIPHIER_FI2C_DEFAULT_SPEED 100000
#define UNIPHIER_FI2C_MAX_SPEED 400000
#define UNIPHIER_FI2C_FIFO_SIZE 8
struct uniphier_fi2c_priv {
@ -537,9 +535,9 @@ static int uniphier_fi2c_probe(struct platform_device *pdev)
}
if (of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed))
bus_speed = UNIPHIER_FI2C_DEFAULT_SPEED;
bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
if (!bus_speed || bus_speed > UNIPHIER_FI2C_MAX_SPEED) {
if (!bus_speed || bus_speed > I2C_MAX_FAST_MODE_FREQ) {
dev_err(dev, "invalid clock-frequency %d\n", bus_speed);
return -EINVAL;
}

7
drivers/i2c/busses/i2c-uniphier.c
View File

@ -35,9 +35,6 @@
#define UNIPHIER_I2C_NOISE 0x1c /* noise filter control */
#define UNIPHIER_I2C_SETUP 0x20 /* setup time control */
#define UNIPHIER_I2C_DEFAULT_SPEED 100000
#define UNIPHIER_I2C_MAX_SPEED 400000
struct uniphier_i2c_priv {
struct completion comp;
struct i2c_adapter adap;
@ -333,9 +330,9 @@ static int uniphier_i2c_probe(struct platform_device *pdev)
}
if (of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed))
bus_speed = UNIPHIER_I2C_DEFAULT_SPEED;
bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
if (!bus_speed || bus_speed > UNIPHIER_I2C_MAX_SPEED) {
if (!bus_speed || bus_speed > I2C_MAX_FAST_MODE_FREQ) {
dev_err(dev, "invalid clock-frequency %d\n", bus_speed);
return -EINVAL;
}

2
drivers/i2c/busses/i2c-wmt.c
View File

@ -399,7 +399,7 @@ static int wmt_i2c_probe(struct platform_device *pdev)
i2c_dev->mode = I2C_MODE_STANDARD;
err = of_property_read_u32(np, "clock-frequency", &clk_rate);
if ((!err) && (clk_rate == 400000))
if (!err && (clk_rate == I2C_MAX_FAST_MODE_FREQ))
i2c_dev->mode = I2C_MODE_FAST;
i2c_dev->dev = &pdev->dev;

8
drivers/i2c/busses/i2c-xlp9xx.c
View File

@ -71,8 +71,6 @@
#define XLP9XX_I2C_SLAVEADDR_ADDR_SHIFT 1
#define XLP9XX_I2C_IP_CLK_FREQ 133000000UL
#define XLP9XX_I2C_DEFAULT_FREQ 100000
#define XLP9XX_I2C_HIGH_FREQ 400000
#define XLP9XX_I2C_FIFO_SIZE 0x80U
#define XLP9XX_I2C_TIMEOUT_MS 1000
#define XLP9XX_I2C_BUSY_TIMEOUT 50
@ -476,12 +474,12 @@ static int xlp9xx_i2c_get_frequency(struct platform_device *pdev,
err = device_property_read_u32(&pdev->dev, "clock-frequency", &freq);
if (err) {
freq = XLP9XX_I2C_DEFAULT_FREQ;
freq = I2C_MAX_STANDARD_MODE_FREQ;
dev_dbg(&pdev->dev, "using default frequency %u\n", freq);
} else if (freq == 0 || freq > XLP9XX_I2C_HIGH_FREQ) {
} else if (freq == 0 || freq > I2C_MAX_FAST_MODE_FREQ) {
dev_warn(&pdev->dev, "invalid frequency %u, using default\n",
freq);
freq = XLP9XX_I2C_DEFAULT_FREQ;
freq = I2C_MAX_STANDARD_MODE_FREQ;
}
priv->clk_hz = freq;

2
drivers/i2c/busses/i2c-xlr.c
View File

@ -404,7 +404,7 @@ static int xlr_i2c_probe(struct platform_device *pdev)
if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&busfreq))
busfreq = 100000;
busfreq = I2C_MAX_STANDARD_MODE_FREQ;
clk = devm_clk_get(&pdev->dev, NULL);
if (!IS_ERR(clk)) {