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i2c: tegra: Factor out register polling into separate function 

Factor out register polling into a separate function in order to remove
boilerplate code and make code cleaner.

Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Dmitry Osipenko 2020-09-30 01:19:07 +03:00 committed by Wolfram Sang
parent 4be62340f3
commit 507ae6ab72
1 changed files with 25 additions and 32 deletions
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57
drivers/i2c/busses/i2c-tegra.c
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@ -514,10 +514,24 @@ static void tegra_i2c_vi_init(struct tegra_i2c_dev *i2c_dev)
i2c_writel(i2c_dev, 0x0, I2C_TLOW_SEXT);
}
static int tegra_i2c_poll_register(struct tegra_i2c_dev *i2c_dev,
u32 reg, u32 mask, u32 delay_us,
u32 timeout_us)
{
void __iomem *addr = i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg);
u32 val;
if (!i2c_dev->is_curr_atomic_xfer)
return readl_relaxed_poll_timeout(addr, val, !(val & mask),
delay_us, timeout_us);
return readl_relaxed_poll_timeout_atomic(addr, val, !(val & mask),
delay_us, timeout_us);
}
static int tegra_i2c_flush_fifos(struct tegra_i2c_dev *i2c_dev)
{
u32 mask, val, offset, reg_offset;
void __iomem *addr;
u32 mask, val, offset;
int err;
if (i2c_dev->hw->has_mst_fifo) {
@ -534,16 +548,7 @@ static int tegra_i2c_flush_fifos(struct tegra_i2c_dev *i2c_dev)
val |= mask;
i2c_writel(i2c_dev, val, offset);
reg_offset = tegra_i2c_reg_addr(i2c_dev, offset);
addr = i2c_dev->base + reg_offset;
if (i2c_dev->is_curr_atomic_xfer)
err = readl_relaxed_poll_timeout_atomic(addr, val, !(val & mask),
1000, 1000000);
else
err = readl_relaxed_poll_timeout(addr, val, !(val & mask),
1000, 1000000);
err = tegra_i2c_poll_register(i2c_dev, offset, mask, 1000, 1000000);
if (err) {
dev_err(i2c_dev->dev, "failed to flush FIFO\n");
return err;
@ -553,30 +558,18 @@ static int tegra_i2c_flush_fifos(struct tegra_i2c_dev *i2c_dev)
static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev)
{
unsigned long reg_offset;
void __iomem *addr;
u32 val;
int err;
if (i2c_dev->hw->has_config_load_reg) {
reg_offset = tegra_i2c_reg_addr(i2c_dev, I2C_CONFIG_LOAD);
addr = i2c_dev->base + reg_offset;
i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD);
if (!i2c_dev->hw->has_config_load_reg)
return 0;
if (i2c_dev->is_curr_atomic_xfer)
err = readl_relaxed_poll_timeout_atomic(
addr, val, val == 0, 1000,
I2C_CONFIG_LOAD_TIMEOUT);
else
err = readl_relaxed_poll_timeout(
addr, val, val == 0, 1000,
I2C_CONFIG_LOAD_TIMEOUT);
i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD);
if (err) {
dev_warn(i2c_dev->dev,
"timeout waiting for config load\n");
return err;
}
err = tegra_i2c_poll_register(i2c_dev, I2C_CONFIG_LOAD, 0xffffffff,
1000, I2C_CONFIG_LOAD_TIMEOUT);
if (err) {
dev_warn(i2c_dev->dev, "timeout waiting for config load\n");
return err;
}
return 0;