From: Dmitry Osipenko <digetx@gmail.com>
To: "Thierry Reding" <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Laxman Dewangan" <ldewangan@nvidia.com>,
"Wolfram Sang" <wsa@the-dreams.de>,
"Michał Mirosław" <mirq-linux@rere.qmqm.pl>,
"Andy Shevchenko" <andy.shevchenko@gmail.com>
Cc: linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v8 24/32] i2c: tegra: Factor out register polling into separate function
Date: Wed, 23 Sep 2020 01:51:47 +0300 [thread overview]
Message-ID: <20200922225155.10798-25-digetx@gmail.com> (raw)
In-Reply-To: <20200922225155.10798-1-digetx@gmail.com>
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: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/i2c/busses/i2c-tegra.c | 57 +++++++++++++++-------------------
1 file changed, 25 insertions(+), 32 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index a0de01d5cb1c..72ad0e8e89d2 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -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;
--
2.27.0
next prev parent reply other threads:[~2020-09-22 22:53 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 22:51 [PATCH v8 00/32] Improvements for Tegra I2C driver Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 01/32] i2c: tegra: Make tegra_i2c_flush_fifos() usable in atomic transfer Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 02/32] i2c: tegra: Add missing pm_runtime_put() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 03/32] i2c: tegra: Handle potential error of tegra_i2c_flush_fifos() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 04/32] i2c: tegra: Mask interrupt in tegra_i2c_issue_bus_clear() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 05/32] i2c: tegra: Initialize div-clk rate unconditionally Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 06/32] i2c: tegra: Remove i2c_dev.clk_divisor_non_hs_mode member Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 07/32] i2c: tegra: Runtime PM always available on Tegra Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 08/32] i2c: tegra: Remove error message used for devm_request_irq() failure Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 09/32] i2c: tegra: Use reset_control_reset() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 10/32] i2c: tegra: Use devm_platform_get_and_ioremap_resource() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 11/32] i2c: tegra: Use platform_get_irq() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 12/32] i2c: tegra: Use clk-bulk helpers Dmitry Osipenko
2020-09-29 19:33 ` Wolfram Sang
2020-09-29 21:01 ` Dmitry Osipenko
2020-09-29 21:46 ` Wolfram Sang
2020-09-22 22:51 ` [PATCH v8 13/32] i2c: tegra: Move out all device-tree parsing into tegra_i2c_parse_dt() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 14/32] i2c: tegra: Clean up probe function Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 15/32] i2c: tegra: Reorder location of functions in the code Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 16/32] i2c: tegra: Clean up variable types Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 17/32] i2c: tegra: Remove outdated barrier() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 18/32] i2c: tegra: Remove likely/unlikely from the code Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 19/32] i2c: tegra: Remove redundant check in tegra_i2c_issue_bus_clear() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 20/32] i2c: tegra: Remove "dma" variable from tegra_i2c_xfer_msg() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 21/32] i2c: tegra: Rename wait/poll functions Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 22/32] i2c: tegra: Factor out error recovery from tegra_i2c_xfer_msg() Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 23/32] i2c: tegra: Factor out packet header setup " Dmitry Osipenko
2020-09-29 21:16 ` Dmitry Osipenko
2020-09-22 22:51 ` Dmitry Osipenko [this message]
2020-09-22 22:51 ` [PATCH v8 25/32] i2c: tegra: Factor out hardware initialization into separate function Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 26/32] i2c: tegra: Check errors for both positive and negative values Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 27/32] i2c: tegra: Improve formatting of variables Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 28/32] i2c: tegra: Clean up variable names Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 29/32] i2c: tegra: Clean up printk messages Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 30/32] i2c: tegra: Clean up and improve comments Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 31/32] i2c: tegra: Clean up whitespaces, newlines and indentation Dmitry Osipenko
2020-09-22 22:51 ` [PATCH v8 32/32] i2c: tegra: Improve driver module description Dmitry Osipenko
2020-09-23 1:19 ` [PATCH v8 00/32] Improvements for Tegra I2C driver Dmitry Osipenko
2020-09-23 7:01 ` Wolfram Sang
2020-09-23 16:10 ` Dmitry Osipenko
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