* [PATCH v2 0/2] i2c: tegra: allow compiling out support for Tegra's special constrollers
@ 2022-01-18 20:00 Michał Mirosław
2022-01-18 20:00 ` [PATCH v2 2/2] i2c: tegra: allow VI support to be compiled out Michał Mirosław
2022-01-18 20:00 ` [PATCH v2 1/2] i2c: tegra: allow DVC " Michał Mirosław
0 siblings, 2 replies; 6+ messages in thread
From: Michał Mirosław @ 2022-01-18 20:00 UTC (permalink / raw)
To: Dmitry Osipenko, Jonathan Hunter, Laxman Dewangan, Thierry Reding
Cc: linux-i2c, linux-kernel, linux-tegra
To patches that, combined, reduce I2C driver's code by ~2kB and a bit
from runtime overhead for non-Tegra20 or non-Tegra210 builds.
v2: remove KConfig symbols as per Dmitry Osipenko's suggestion.
This assumes that for relevant SoCs the special controller implementations
will be used anyway.
Michał Mirosław (2):
i2c: tegra: allow DVC support to be compiled out
i2c: tegra: allow VI support to be compiled out
drivers/i2c/busses/i2c-tegra.c | 35 +++++++++++++++++++++-------------
1 file changed, 22 insertions(+), 13 deletions(-)
--
2.30.2
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v2 1/2] i2c: tegra: allow DVC support to be compiled out
2022-01-18 20:00 [PATCH v2 0/2] i2c: tegra: allow compiling out support for Tegra's special constrollers Michał Mirosław
2022-01-18 20:00 ` [PATCH v2 2/2] i2c: tegra: allow VI support to be compiled out Michał Mirosław
@ 2022-01-18 20:00 ` Michał Mirosław
2022-01-18 20:33 ` Dmitry Osipenko
2022-01-27 21:31 ` Wolfram Sang
1 sibling, 2 replies; 6+ messages in thread
From: Michał Mirosław @ 2022-01-18 20:00 UTC (permalink / raw)
To: Laxman Dewangan, Dmitry Osipenko, Thierry Reding, Jonathan Hunter
Cc: linux-i2c, linux-tegra, linux-kernel
Save a bit of code for newer Tegra platforms by compiling out
DVC's I2C mode support that's used only for Tegra2.
$ size i2c-tegra.o
text data bss dec hex filename
- 10385 240 8 10633 2989 i2c-tegra.o
+ 9617 240 8 9865 2689 i2c-tegra.o
---
v2: remove KConfig symbol as per Dmitry Osipenko's suggestion.
(Assuming that for Tegra20 the DVC part will be used anyway.)
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
drivers/i2c/busses/i2c-tegra.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index b3184c422826..96bfe7013d85 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -294,6 +294,8 @@ struct tegra_i2c_dev {
bool is_vi;
};
+#define IS_DVC(dev) (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && dev->is_dvc)
+
static void dvc_writel(struct tegra_i2c_dev *i2c_dev, u32 val,
unsigned int reg)
{
@@ -311,7 +313,7 @@ static u32 dvc_readl(struct tegra_i2c_dev *i2c_dev, unsigned int reg)
*/
static u32 tegra_i2c_reg_addr(struct tegra_i2c_dev *i2c_dev, unsigned int reg)
{
- if (i2c_dev->is_dvc)
+ if (IS_DVC(i2c_dev))
reg += (reg >= I2C_TX_FIFO) ? 0x10 : 0x40;
else if (i2c_dev->is_vi)
reg = 0xc00 + (reg << 2);
@@ -621,7 +623,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
err = reset_control_reset(i2c_dev->rst);
WARN_ON_ONCE(err);
- if (i2c_dev->is_dvc)
+ if (IS_DVC(i2c_dev))
tegra_dvc_init(i2c_dev);
val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN |
@@ -685,7 +687,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
return err;
}
- if (!i2c_dev->is_dvc && !i2c_dev->is_vi) {
+ if (!IS_DVC(i2c_dev) && !i2c_dev->is_vi) {
u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG);
sl_cfg |= I2C_SL_CNFG_NACK | I2C_SL_CNFG_NEWSL;
@@ -915,7 +917,7 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
}
i2c_writel(i2c_dev, status, I2C_INT_STATUS);
- if (i2c_dev->is_dvc)
+ if (IS_DVC(i2c_dev))
dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS);
/*
@@ -954,7 +956,7 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
i2c_writel(i2c_dev, status, I2C_INT_STATUS);
- if (i2c_dev->is_dvc)
+ if (IS_DVC(i2c_dev))
dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS);
if (i2c_dev->dma_mode) {
@@ -1616,7 +1618,9 @@ static const struct of_device_id tegra_i2c_of_match[] = {
{ .compatible = "nvidia,tegra114-i2c", .data = &tegra114_i2c_hw, },
{ .compatible = "nvidia,tegra30-i2c", .data = &tegra30_i2c_hw, },
{ .compatible = "nvidia,tegra20-i2c", .data = &tegra20_i2c_hw, },
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC)
{ .compatible = "nvidia,tegra20-i2c-dvc", .data = &tegra20_i2c_hw, },
+#endif
{},
};
MODULE_DEVICE_TABLE(of, tegra_i2c_of_match);
@@ -1635,7 +1639,8 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev)
multi_mode = of_property_read_bool(np, "multi-master");
i2c_dev->multimaster_mode = multi_mode;
- if (of_device_is_compatible(np, "nvidia,tegra20-i2c-dvc"))
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) &&
+ of_device_is_compatible(np, "nvidia,tegra20-i2c-dvc"))
i2c_dev->is_dvc = true;
if (of_device_is_compatible(np, "nvidia,tegra210-i2c-vi"))
--
2.30.2
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v2 2/2] i2c: tegra: allow VI support to be compiled out
2022-01-18 20:00 [PATCH v2 0/2] i2c: tegra: allow compiling out support for Tegra's special constrollers Michał Mirosław
@ 2022-01-18 20:00 ` Michał Mirosław
2022-01-18 20:33 ` Dmitry Osipenko
2022-01-18 20:00 ` [PATCH v2 1/2] i2c: tegra: allow DVC " Michał Mirosław
1 sibling, 1 reply; 6+ messages in thread
From: Michał Mirosław @ 2022-01-18 20:00 UTC (permalink / raw)
To: Laxman Dewangan, Dmitry Osipenko, Thierry Reding, Jonathan Hunter
Cc: linux-i2c, linux-tegra, linux-kernel
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
10385 240 8 10633 2989 i2c-tegra.o (full)
9617 240 8 9865 2689 i2c-tegra.o (no-dvc)
9389 240 8 9637 25a5 i2c-tegra.o (no-vi)
8617 240 8 8865 22a1 i2c-tegra.o (no-vi,no-dvc)
---
v2: remove KConfig symbol as per Dmitry Osipenko's suggestion.
(Assuming that for Tegra210 the VI part will be used anyway.)
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
drivers/i2c/busses/i2c-tegra.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 96bfe7013d85..6ced964c83b2 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -295,6 +295,7 @@ 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)
@@ -315,7 +316,7 @@ 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;
@@ -444,7 +445,7 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
u32 *dma_buf;
int err;
- if (!i2c_dev->hw->has_apb_dma || i2c_dev->is_vi)
+ if (!i2c_dev->hw->has_apb_dma || IS_VI(i2c_dev))
return 0;
if (!IS_ENABLED(CONFIG_TEGRA20_APB_DMA)) {
@@ -635,7 +636,7 @@ 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 (i2c_dev->bus_clk_rate) {
@@ -687,7 +688,7 @@ 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;
@@ -1612,7 +1613,9 @@ 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, },
@@ -1643,7 +1646,8 @@ 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;
}
@@ -1656,7 +1660,7 @@ 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,
@@ -1777,7 +1781,7 @@ 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);
@@ -1850,7 +1854,7 @@ 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;
--
2.30.2
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v2 1/2] i2c: tegra: allow DVC support to be compiled out
2022-01-18 20:00 ` [PATCH v2 1/2] i2c: tegra: allow DVC " Michał Mirosław
@ 2022-01-18 20:33 ` Dmitry Osipenko
2022-01-27 21:31 ` Wolfram Sang
1 sibling, 0 replies; 6+ messages in thread
From: Dmitry Osipenko @ 2022-01-18 20:33 UTC (permalink / raw)
To: Michał Mirosław, Laxman Dewangan, Thierry Reding,
Jonathan Hunter
Cc: linux-i2c, linux-tegra, linux-kernel
18.01.2022 23:00, Michał Mirosław пишет:
> Save a bit of code for newer Tegra platforms by compiling out
> DVC's I2C mode support that's used only for Tegra2.
>
> $ size i2c-tegra.o
> text data bss dec hex filename
> - 10385 240 8 10633 2989 i2c-tegra.o
> + 9617 240 8 9865 2689 i2c-tegra.o
>
> ---
> v2: remove KConfig symbol as per Dmitry Osipenko's suggestion.
> (Assuming that for Tegra20 the DVC part will be used anyway.)
>
> Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
> ---
> drivers/i2c/busses/i2c-tegra.c | 17 +++++++++++------
> 1 file changed, 11 insertions(+), 6 deletions(-)
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2 2/2] i2c: tegra: allow VI support to be compiled out
2022-01-18 20:00 ` [PATCH v2 2/2] i2c: tegra: allow VI support to be compiled out Michał Mirosław
@ 2022-01-18 20:33 ` Dmitry Osipenko
0 siblings, 0 replies; 6+ messages in thread
From: Dmitry Osipenko @ 2022-01-18 20:33 UTC (permalink / raw)
To: Michał Mirosław, Laxman Dewangan, Thierry Reding,
Jonathan Hunter
Cc: linux-i2c, linux-tegra, linux-kernel
18.01.2022 23:00, Michał Mirosław пишет:
> 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
> 10385 240 8 10633 2989 i2c-tegra.o (full)
> 9617 240 8 9865 2689 i2c-tegra.o (no-dvc)
> 9389 240 8 9637 25a5 i2c-tegra.o (no-vi)
> 8617 240 8 8865 22a1 i2c-tegra.o (no-vi,no-dvc)
>
> ---
> v2: remove KConfig symbol as per Dmitry Osipenko's suggestion.
> (Assuming that for Tegra210 the VI part will be used anyway.)
>
> Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
> ---
> drivers/i2c/busses/i2c-tegra.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2 1/2] i2c: tegra: allow DVC support to be compiled out
2022-01-18 20:00 ` [PATCH v2 1/2] i2c: tegra: allow DVC " Michał Mirosław
2022-01-18 20:33 ` Dmitry Osipenko
@ 2022-01-27 21:31 ` Wolfram Sang
1 sibling, 0 replies; 6+ messages in thread
From: Wolfram Sang @ 2022-01-27 21:31 UTC (permalink / raw)
To: Michał Mirosław
Cc: Laxman Dewangan, Dmitry Osipenko, Thierry Reding,
Jonathan Hunter, linux-i2c, linux-tegra, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 542 bytes --]
Hi Michał,
> ---
> v2: remove KConfig symbol as per Dmitry Osipenko's suggestion.
> (Assuming that for Tegra20 the DVC part will be used anyway.)
>
> Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Your SoB should be above the "---" line.
> +#define IS_DVC(dev) (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && dev->is_dvc)
'checkpatch --strict' IMO rightfully mentions that 'dev' should be in
paranthesis when being used.
Both comments apply to patch 2 as well. Otherwise looks good!
Thanks,
Wolfram
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2022-01-27 21:32 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2022-01-18 20:00 [PATCH v2 0/2] i2c: tegra: allow compiling out support for Tegra's special constrollers Michał Mirosław
2022-01-18 20:00 ` [PATCH v2 2/2] i2c: tegra: allow VI support to be compiled out Michał Mirosław
2022-01-18 20:33 ` Dmitry Osipenko
2022-01-18 20:00 ` [PATCH v2 1/2] i2c: tegra: allow DVC " Michał Mirosław
2022-01-18 20:33 ` Dmitry Osipenko
2022-01-27 21:31 ` Wolfram Sang
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