* [PATCH V5 4/4] video: simplefb: switch to use clk_bulk API to simplify clock operations
[not found] <1535553669-30250-1-git-send-email-aisheng.dong@nxp.com>
@ 2018-08-29 14:41 ` Dong Aisheng
2018-08-29 15:22 ` Hans de Goede
0 siblings, 1 reply; 3+ messages in thread
From: Dong Aisheng @ 2018-08-29 14:41 UTC (permalink / raw)
To: linux-arm-kernel
Switching to use clk_bulk API to simplify clock operations.
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: linux-fbdev@vger.kernel.org
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Thor Thayer <thor.thayer@linux.intel.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
v4->v5:
* fix wrong setting of par->clks_enabled
v3->v4:
* no changes
v2->v3:
* fix a build warning on x86 platform due to a wrong
of the prototype of simplefb_clocks_enable
v1->v2:
* switch to clk_bulk_get_all from of_clk_bulk_get_all
---
drivers/video/fbdev/simplefb.c | 68 +++++++++---------------------------------
1 file changed, 14 insertions(+), 54 deletions(-)
diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c
index 9a9d748..8d1fbd6 100644
--- a/drivers/video/fbdev/simplefb.c
+++ b/drivers/video/fbdev/simplefb.c
@@ -182,7 +182,7 @@ struct simplefb_par {
#if defined CONFIG_OF && defined CONFIG_COMMON_CLK
bool clks_enabled;
unsigned int clk_count;
- struct clk **clks;
+ struct clk_bulk_data *clks;
#endif
#if defined CONFIG_OF && defined CONFIG_REGULATOR
bool regulators_enabled;
@@ -214,37 +214,13 @@ static int simplefb_clocks_get(struct simplefb_par *par,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
- struct clk *clock;
- int i;
if (dev_get_platdata(&pdev->dev) || !np)
return 0;
- par->clk_count = of_clk_get_parent_count(np);
- if (!par->clk_count)
- return 0;
-
- par->clks = kcalloc(par->clk_count, sizeof(struct clk *), GFP_KERNEL);
- if (!par->clks)
- return -ENOMEM;
-
- for (i = 0; i < par->clk_count; i++) {
- clock = of_clk_get(np, i);
- if (IS_ERR(clock)) {
- if (PTR_ERR(clock) = -EPROBE_DEFER) {
- while (--i >= 0) {
- if (par->clks[i])
- clk_put(par->clks[i]);
- }
- kfree(par->clks);
- return -EPROBE_DEFER;
- }
- dev_err(&pdev->dev, "%s: clock %d not found: %ld\n",
- __func__, i, PTR_ERR(clock));
- continue;
- }
- par->clks[i] = clock;
- }
+ par->clk_count = clk_bulk_get_all(&pdev->dev, &par->clks);
+ if ((par->clk_count < 0) && (par->clk_count = -EPROBE_DEFER))
+ return -EPROBE_DEFER;
return 0;
}
@@ -252,39 +228,23 @@ static int simplefb_clocks_get(struct simplefb_par *par,
static void simplefb_clocks_enable(struct simplefb_par *par,
struct platform_device *pdev)
{
- int i, ret;
+ int ret;
- for (i = 0; i < par->clk_count; i++) {
- if (par->clks[i]) {
- ret = clk_prepare_enable(par->clks[i]);
- if (ret) {
- dev_err(&pdev->dev,
- "%s: failed to enable clock %d: %d\n",
- __func__, i, ret);
- clk_put(par->clks[i]);
- par->clks[i] = NULL;
- }
- }
+ ret = clk_bulk_prepare_enable(par->clk_count, par->clks);
+ if (ret) {
+ par->clks_enabled = false;
+ dev_warn(&pdev->dev, "failed to enable clocks\n");
+ } else {
+ par->clks_enabled = true;
}
- par->clks_enabled = true;
}
static void simplefb_clocks_destroy(struct simplefb_par *par)
{
- int i;
-
- if (!par->clks)
- return;
-
- for (i = 0; i < par->clk_count; i++) {
- if (par->clks[i]) {
- if (par->clks_enabled)
- clk_disable_unprepare(par->clks[i]);
- clk_put(par->clks[i]);
- }
- }
+ if (par->clks_enabled)
+ clk_bulk_disable_unprepare(par->clk_count, par->clks);
- kfree(par->clks);
+ clk_bulk_put_all(par->clk_count, par->clks);
}
#else
static int simplefb_clocks_get(struct simplefb_par *par,
--
2.7.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH V5 4/4] video: simplefb: switch to use clk_bulk API to simplify clock operations
2018-08-29 14:41 ` [PATCH V5 4/4] video: simplefb: switch to use clk_bulk API to simplify clock operations Dong Aisheng
@ 2018-08-29 15:22 ` Hans de Goede
2018-08-31 2:09 ` A.s. Dong
0 siblings, 1 reply; 3+ messages in thread
From: Hans de Goede @ 2018-08-29 15:22 UTC (permalink / raw)
To: linux-arm-kernel
Hi,
On 29-08-18 16:41, Dong Aisheng wrote:
> Switching to use clk_bulk API to simplify clock operations.
>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Cc: linux-fbdev@vger.kernel.org
> Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
> Cc: Stephen Boyd <sboyd@codeaurora.org>
> Tested-by: Thor Thayer <thor.thayer@linux.intel.com>
> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
> ---
> v4->v5:
> * fix wrong setting of par->clks_enabled
> v3->v4:
> * no changes
> v2->v3:
> * fix a build warning on x86 platform due to a wrong
> of the prototype of simplefb_clocks_enable
> v1->v2:
> * switch to clk_bulk_get_all from of_clk_bulk_get_all
> ---
> drivers/video/fbdev/simplefb.c | 68 +++++++++---------------------------------
> 1 file changed, 14 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c
> index 9a9d748..8d1fbd6 100644
> --- a/drivers/video/fbdev/simplefb.c
> +++ b/drivers/video/fbdev/simplefb.c
> @@ -182,7 +182,7 @@ struct simplefb_par {
> #if defined CONFIG_OF && defined CONFIG_COMMON_CLK
> bool clks_enabled;
> unsigned int clk_count;
> - struct clk **clks;
> + struct clk_bulk_data *clks;
> #endif
> #if defined CONFIG_OF && defined CONFIG_REGULATOR
> bool regulators_enabled;
> @@ -214,37 +214,13 @@ static int simplefb_clocks_get(struct simplefb_par *par,
> struct platform_device *pdev)
> {
> struct device_node *np = pdev->dev.of_node;
> - struct clk *clock;
> - int i;
>
> if (dev_get_platdata(&pdev->dev) || !np)
> return 0;
>
> - par->clk_count = of_clk_get_parent_count(np);
> - if (!par->clk_count)
> - return 0;
> -
> - par->clks = kcalloc(par->clk_count, sizeof(struct clk *), GFP_KERNEL);
> - if (!par->clks)
> - return -ENOMEM;
> -
> - for (i = 0; i < par->clk_count; i++) {
> - clock = of_clk_get(np, i);
> - if (IS_ERR(clock)) {
> - if (PTR_ERR(clock) = -EPROBE_DEFER) {
> - while (--i >= 0) {
> - if (par->clks[i])
> - clk_put(par->clks[i]);
> - }
> - kfree(par->clks);
> - return -EPROBE_DEFER;
> - }
> - dev_err(&pdev->dev, "%s: clock %d not found: %ld\n",
> - __func__, i, PTR_ERR(clock));
> - continue;
> - }
> - par->clks[i] = clock;
> - }
> + par->clk_count = clk_bulk_get_all(&pdev->dev, &par->clks);
> + if ((par->clk_count < 0) && (par->clk_count = -EPROBE_DEFER))
> + return -EPROBE_DEFER;
I just noticed this now, but clk_count is unsigned so it will never
be < 0, please make it signed.
Also there is no need to check for < 0 just (par->clk_count = -EPROBE_DEFER)
is enough (if that is true < 0 also always is true).
>
> return 0;
> }
> @@ -252,39 +228,23 @@ static int simplefb_clocks_get(struct simplefb_par *par,
> static void simplefb_clocks_enable(struct simplefb_par *par,
> struct platform_device *pdev)
> {
> - int i, ret;
> + int ret;
>
> - for (i = 0; i < par->clk_count; i++) {
> - if (par->clks[i]) {
> - ret = clk_prepare_enable(par->clks[i]);
> - if (ret) {
> - dev_err(&pdev->dev,
> - "%s: failed to enable clock %d: %d\n",
> - __func__, i, ret);
> - clk_put(par->clks[i]);
> - par->clks[i] = NULL;
> - }
> - }
> + ret = clk_bulk_prepare_enable(par->clk_count, par->clks);
Hmm, what happens if par->clk_count < 0 (another <0 value then
-EPROBEDEFER) ?
> + if (ret) {
> + par->clks_enabled = false;
No need to set false here.
> + dev_warn(&pdev->dev, "failed to enable clocks\n");
> + } else {
> + par->clks_enabled = true;
> }
> - par->clks_enabled = true;
> }
>
> static void simplefb_clocks_destroy(struct simplefb_par *par)
> {
> - int i;
> -
> - if (!par->clks)
> - return;
> -
> - for (i = 0; i < par->clk_count; i++) {
> - if (par->clks[i]) {
> - if (par->clks_enabled)
> - clk_disable_unprepare(par->clks[i]);
> - clk_put(par->clks[i]);
> - }
> - }
> + if (par->clks_enabled)
> + clk_bulk_disable_unprepare(par->clk_count, par->clks);
>
> - kfree(par->clks);
> + clk_bulk_put_all(par->clk_count, par->clks);
Again what about par->clk_count < 0 ?
Regards,
Hans
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: [PATCH V5 4/4] video: simplefb: switch to use clk_bulk API to simplify clock operations
2018-08-29 15:22 ` Hans de Goede
@ 2018-08-31 2:09 ` A.s. Dong
0 siblings, 0 replies; 3+ messages in thread
From: A.s. Dong @ 2018-08-31 2:09 UTC (permalink / raw)
To: linux-arm-kernel
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2018-08-29 14:41 ` [PATCH V5 4/4] video: simplefb: switch to use clk_bulk API to simplify clock operations Dong Aisheng
2018-08-29 15:22 ` Hans de Goede
2018-08-31 2:09 ` A.s. Dong
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