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Message-Id: <0248c0737ace5db7be4e04f97985f3e7874ff1ab.1683407699.git.mirq-linux@rere.qmqm.pl>
Date: Sat, 06 May 2023 23:19:02 +0200
From: Michał Mirosław <mirq-linux@...e.qmqm.pl>
To: Dmitry Osipenko <digetx@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Laxman Dewangan <ldewangan@...dia.com>,
Thierry Reding <thierry.reding@...il.com>
Cc: linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-tegra@...r.kernel.org
Subject: [PATCH v4 2/2] i2c: tegra: allow VI support to be compiled out
Save a bit of code for older Tegra platforms by compiling out
VI's I2C mode support that's used only for Tegra210.
$ size i2c-tegra.o
text data bss dec hex filename
11381 292 8 11681 2da1 i2c-tegra.o (full)
10193 292 8 10493 28fd i2c-tegra.o (no-dvc)
9145 292 8 9445 24e5 i2c-tegra.o (no-vi,no-dvc)
Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
Reviewed-by: Dmitry Osipenko <digetx@...il.com>
Reviewed-by: Wolfram Sang <wsa@...nel.org>
---
v4: include a missed is_vi check in i2c_writel() readback
v3: add parentheses for IS_VI() macro value
v2: remove KConfig symbol as per Dmitry Osipenko's suggestion.
(Assuming that for Tegra210 the VI part will be used anyway.)
---
drivers/i2c/busses/i2c-tegra.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 51ef2e80e8ce..d26f94364fbc 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -299,6 +299,7 @@ struct tegra_i2c_dev {
};
#define IS_DVC(dev) (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && (dev)->is_dvc)
+#define IS_VI(dev) (IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) && (dev)->is_vi)
static void dvc_writel(struct tegra_i2c_dev *i2c_dev, u32 val,
unsigned int reg)
@@ -319,7 +320,7 @@ static u32 tegra_i2c_reg_addr(struct tegra_i2c_dev *i2c_dev, unsigned int reg)
{
if (IS_DVC(i2c_dev))
reg += (reg >= I2C_TX_FIFO) ? 0x10 : 0x40;
- else if (i2c_dev->is_vi)
+ else if (IS_VI(i2c_dev))
reg = 0xc00 + (reg << 2);
return reg;
@@ -332,7 +333,7 @@ static void i2c_writel(struct tegra_i2c_dev *i2c_dev, u32 val, unsigned int reg)
/* read back register to make sure that register writes completed */
if (reg != I2C_TX_FIFO)
readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
- else if (i2c_dev->is_vi)
+ else if (IS_VI(i2c_dev))
readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, I2C_INT_STATUS));
}
@@ -448,7 +449,7 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
u32 *dma_buf;
int err;
- if (i2c_dev->is_vi)
+ if (IS_VI(i2c_dev))
return 0;
if (!i2c_dev->hw->has_apb_dma) {
@@ -653,7 +654,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
i2c_writel(i2c_dev, val, I2C_CNFG);
i2c_writel(i2c_dev, 0, I2C_INT_MASK);
- if (i2c_dev->is_vi)
+ if (IS_VI(i2c_dev))
tegra_i2c_vi_init(i2c_dev);
switch (t->bus_freq_hz) {
@@ -705,7 +706,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
return err;
}
- if (!IS_DVC(i2c_dev) && !i2c_dev->is_vi) {
+ if (!IS_DVC(i2c_dev) && !IS_VI(i2c_dev)) {
u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG);
sl_cfg |= I2C_SL_CNFG_NACK | I2C_SL_CNFG_NEWSL;
@@ -848,7 +849,7 @@ static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev)
i2c_dev->msg_buf_remaining = buf_remaining;
i2c_dev->msg_buf = buf + words_to_transfer * BYTES_PER_FIFO_WORD;
- if (i2c_dev->is_vi)
+ if (IS_VI(i2c_dev))
i2c_writesl_vi(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer);
else
i2c_writesl(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer);
@@ -1656,7 +1657,9 @@ static const struct tegra_i2c_hw_feature tegra194_i2c_hw = {
static const struct of_device_id tegra_i2c_of_match[] = {
{ .compatible = "nvidia,tegra194-i2c", .data = &tegra194_i2c_hw, },
{ .compatible = "nvidia,tegra186-i2c", .data = &tegra186_i2c_hw, },
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
{ .compatible = "nvidia,tegra210-i2c-vi", .data = &tegra210_i2c_hw, },
+#endif
{ .compatible = "nvidia,tegra210-i2c", .data = &tegra210_i2c_hw, },
{ .compatible = "nvidia,tegra124-i2c", .data = &tegra124_i2c_hw, },
{ .compatible = "nvidia,tegra114-i2c", .data = &tegra114_i2c_hw, },
@@ -1683,7 +1686,8 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev)
of_device_is_compatible(np, "nvidia,tegra20-i2c-dvc"))
i2c_dev->is_dvc = true;
- if (of_device_is_compatible(np, "nvidia,tegra210-i2c-vi"))
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) &&
+ of_device_is_compatible(np, "nvidia,tegra210-i2c-vi"))
i2c_dev->is_vi = true;
}
@@ -1712,7 +1716,7 @@ static int tegra_i2c_init_clocks(struct tegra_i2c_dev *i2c_dev)
if (i2c_dev->hw == &tegra20_i2c_hw || i2c_dev->hw == &tegra30_i2c_hw)
i2c_dev->clocks[i2c_dev->nclocks++].id = "fast-clk";
- if (i2c_dev->is_vi)
+ if (IS_VI(i2c_dev))
i2c_dev->clocks[i2c_dev->nclocks++].id = "slow";
err = devm_clk_bulk_get(i2c_dev->dev, i2c_dev->nclocks,
@@ -1830,7 +1834,7 @@ static int tegra_i2c_probe(struct platform_device *pdev)
* VI I2C device shouldn't be marked as IRQ-safe because VI I2C won't
* be used for atomic transfers.
*/
- if (!i2c_dev->is_vi)
+ if (!IS_VI(i2c_dev))
pm_runtime_irq_safe(i2c_dev->dev);
pm_runtime_enable(i2c_dev->dev);
@@ -1904,7 +1908,7 @@ static int __maybe_unused tegra_i2c_runtime_resume(struct device *dev)
* power ON/OFF during runtime PM resume/suspend, meaning that
* controller needs to be re-initialized after power ON.
*/
- if (i2c_dev->is_vi) {
+ if (IS_VI(i2c_dev)) {
err = tegra_i2c_init(i2c_dev);
if (err)
goto disable_clocks;
--
2.39.2
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