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I2C: OMAP2+: Convert omap I2C driver to use feature implementation flags from platform data

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This patch eliminates all cpu_...() tests from the OMAP I2C driver.

Instead, it uses the functionality flags in the platform data to make
the decisions about product variations the driver needs to handle.

Cc: patches@linaro.org
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andy Green <andy.green@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Andy Green 2011-05-30 07:43:09 -07:00 committed by Ben Dooks
parent 8e286f5a21
commit 3be0053ee1
1 changed files with 23 additions and 17 deletions
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40
drivers/i2c/busses/i2c-omap.c
View file

@ -277,7 +277,7 @@ static void omap_i2c_unidle(struct omap_i2c_dev *dev)
pm_runtime_get_sync(&pdev->dev);
if (cpu_is_omap34xx()) {
if (pdata->flags & OMAP_I2C_FLAG_RESET_REGS_POSTIDLE) {
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
omap_i2c_write_reg(dev, OMAP_I2C_PSC_REG, dev->pscstate);
omap_i2c_write_reg(dev, OMAP_I2C_SCLL_REG, dev->scllstate);
@ -335,6 +335,11 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
unsigned long timeout;
unsigned long internal_clk = 0;
struct clk *fclk;
struct platform_device *pdev;
struct omap_i2c_bus_platform_data *pdata;
pdev = to_platform_device(dev->dev);
pdata = pdev->dev.platform_data;
if (dev->rev >= OMAP_I2C_OMAP1_REV_2) {
/* Disable I2C controller before soft reset */
@ -386,7 +391,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
}
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
if (cpu_class_is_omap1()) {
if (pdata->flags & OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK) {
/*
* The I2C functional clock is the armxor_ck, so there's
* no need to get "armxor_ck" separately. Now, if OMAP2420
@ -410,7 +415,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
psc = fclk_rate / 12000000;
}
if (!(cpu_class_is_omap1() || cpu_is_omap2420())) {
if (!(pdata->flags & OMAP_I2C_FLAG_SIMPLE_CLOCK)) {
/*
* HSI2C controller internal clk rate should be 19.2 Mhz for
@ -418,7 +423,8 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
* to get longer filter period for better noise suppression.
* The filter is iclk (fclk for HS) period.
*/
if (dev->speed > 400 || cpu_is_omap2430())
if (dev->speed > 400 ||
pdata->flags & OMAP_I2C_FLAG_FORCE_19200_INT_CLK)
internal_clk = 19200;
else if (dev->speed > 100)
internal_clk = 9600;
@ -487,7 +493,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
dev->errata = 0;
if (cpu_is_omap2430() || cpu_is_omap34xx())
if (pdata->flags & OMAP_I2C_FLAG_APPLY_ERRATA_I207)
dev->errata |= I2C_OMAP_ERRATA_I207;
/* Enable interrupts */
@ -496,7 +502,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
OMAP_I2C_IE_AL) | ((dev->fifo_size) ?
(OMAP_I2C_IE_RDR | OMAP_I2C_IE_XDR) : 0);
omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, dev->iestate);
if (cpu_is_omap34xx()) {
if (pdata->flags & OMAP_I2C_FLAG_RESET_REGS_POSTIDLE) {
dev->pscstate = psc;
dev->scllstate = scll;
dev->sclhstate = sclh;
@ -816,6 +822,11 @@ omap_i2c_isr(int this_irq, void *dev_id)
u16 bits;
u16 stat, w;
int err, count = 0;
struct platform_device *pdev;
struct omap_i2c_bus_platform_data *pdata;
pdev = to_platform_device(dev->dev);
pdata = pdev->dev.platform_data;
if (dev->idle)
return IRQ_NONE;
@ -884,8 +895,8 @@ omap_i2c_isr(int this_irq, void *dev_id)
* Data reg in 2430, omap3 and
* omap4 is 8 bit wide
*/
if (cpu_class_is_omap1() ||
cpu_is_omap2420()) {
if (pdata->flags &
OMAP_I2C_FLAG_16BIT_DATA_REG) {
if (dev->buf_len) {
*dev->buf++ = w >> 8;
dev->buf_len--;
@ -927,8 +938,8 @@ omap_i2c_isr(int this_irq, void *dev_id)
* Data reg in 2430, omap3 and
* omap4 is 8 bit wide
*/
if (cpu_class_is_omap1() ||
cpu_is_omap2420()) {
if (pdata->flags &
OMAP_I2C_FLAG_16BIT_DATA_REG) {
if (dev->buf_len) {
w |= *dev->buf++ << 8;
dev->buf_len--;
@ -1030,12 +1041,7 @@ omap_i2c_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dev);
if (cpu_is_omap7xx())
dev->reg_shift = 1;
else if (cpu_is_omap44xx())
dev->reg_shift = 0;
else
dev->reg_shift = 2;
dev->reg_shift = (pdata->flags >> OMAP_I2C_FLAG_BUS_SHIFT__SHIFT) & 3;
if (pdata->rev == OMAP_I2C_IP_VERSION_2)
dev->regs = (u8 *)reg_map_ip_v2;
@ -1050,7 +1056,7 @@ omap_i2c_probe(struct platform_device *pdev)
if (dev->rev <= OMAP_I2C_REV_ON_3430)
dev->errata |= I2C_OMAP3_1P153;
if (!(cpu_class_is_omap1() || cpu_is_omap2420())) {
if (!(pdata->flags & OMAP_I2C_FLAG_NO_FIFO)) {
u16 s;
/* Set up the fifo size - Get total size */