Message ID | 1491226922-20307-4-git-send-email-vivek.gautam@codeaurora.org |
---|---|
State | Superseded |
Headers | show |
Hi Vivek,
[auto build test WARNING on balbi-usb/next]
[also build test WARNING on v4.11-rc5 next-20170403]
[cannot apply to pza/reset/next]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Vivek-Gautam/reset-APIs-to-manage-a-list-of-resets/20170404-111639
base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next
coccinelle warnings: (new ones prefixed by >>)
>> drivers/usb/dwc3/dwc3-of-simple.c:53:43-49: ERROR: application of sizeof to pointer
Please review and possibly fold the followup patch.
---
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Hi Vivek,
[auto build test WARNING on balbi-usb/next]
[also build test WARNING on v4.11-rc5 next-20170403]
[cannot apply to pza/reset/next]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Vivek-Gautam/reset-APIs-to-manage-a-list-of-resets/20170404-111639
base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next
config: i386-randconfig-r0-201714 (attached as .config)
compiler: gcc-5 (Debian 5.4.1-2) 5.4.1 20160904
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
In file included from drivers/usb/dwc3/dwc3-of-simple.c:32:0:
include/linux/reset.h:106:1: error: expected identifier or '(' before '{' token
{
^
include/linux/reset.h: In function 'devm_reset_control_array_get':
include/linux/reset.h:127:9: warning: return makes integer from pointer without a cast [-Wint-conversion]
return optional ? NULL : ERR_PTR(-ENOTSUPP);
^
include/linux/reset.h: In function 'of_reset_control_array_get':
include/linux/reset.h:135:9: warning: return makes integer from pointer without a cast [-Wint-conversion]
return optional ? NULL : ERR_PTR(-ENOTSUPP);
^
drivers/usb/dwc3/dwc3-of-simple.c: At top level:
>> include/linux/reset.h:105:19: warning: 'of_reset_control_get_count' used but never defined
static inline int of_reset_control_get_count(struct device_node *node);
^
vim +/of_reset_control_get_count +105 include/linux/reset.h
bb475230 Ramiro Oliveira 2017-01-13 99 struct device *dev, const char *id,
bb475230 Ramiro Oliveira 2017-01-13 100 int index, bool shared, bool optional)
5bcd0b7f Axel Lin 2015-09-01 101 {
0ca10b60 Philipp Zabel 2017-03-20 102 return optional ? NULL : ERR_PTR(-ENOTSUPP);
5bcd0b7f Axel Lin 2015-09-01 103 }
5bcd0b7f Axel Lin 2015-09-01 104
045cc544 Vivek Gautam 2017-04-03 @105 static inline int of_reset_control_get_count(struct device_node *node);
045cc544 Vivek Gautam 2017-04-03 106 {
045cc544 Vivek Gautam 2017-04-03 107 return -ENOTSUPP;
045cc544 Vivek Gautam 2017-04-03 108 }
045cc544 Vivek Gautam 2017-04-03 109
d5652c65 Vivek Gautam 2017-04-03 110 static inline int reset_control_array_assert(int num_rsts,
d5652c65 Vivek Gautam 2017-04-03 111 struct reset_control_array *resets)
d5652c65 Vivek Gautam 2017-04-03 112 {
d5652c65 Vivek Gautam 2017-04-03 113 return 0;
d5652c65 Vivek Gautam 2017-04-03 114 }
d5652c65 Vivek Gautam 2017-04-03 115
d5652c65 Vivek Gautam 2017-04-03 116 static inline int reset_control_array_deassert(int num_rsts,
d5652c65 Vivek Gautam 2017-04-03 117 struct reset_control_array *resets)
d5652c65 Vivek Gautam 2017-04-03 118 {
d5652c65 Vivek Gautam 2017-04-03 119 return 0;
d5652c65 Vivek Gautam 2017-04-03 120 }
d5652c65 Vivek Gautam 2017-04-03 121
d5652c65 Vivek Gautam 2017-04-03 122 static inline
d5652c65 Vivek Gautam 2017-04-03 123 int devm_reset_control_array_get(struct device *dev, int num_rsts,
d5652c65 Vivek Gautam 2017-04-03 124 struct reset_control_array *resets,
d5652c65 Vivek Gautam 2017-04-03 125 bool shared, bool optional)
d5652c65 Vivek Gautam 2017-04-03 126 {
d5652c65 Vivek Gautam 2017-04-03 @127 return optional ? NULL : ERR_PTR(-ENOTSUPP);
d5652c65 Vivek Gautam 2017-04-03 128 }
d5652c65 Vivek Gautam 2017-04-03 129
d5652c65 Vivek Gautam 2017-04-03 130 static inline
:::::: The code at line 105 was first introduced by commit
:::::: 045cc544119a744cda92da0644066f18cb3760b4 reset: Add API to count number of reset available with device
:::::: TO: Vivek Gautam <vivek.gautam@codeaurora.org>
:::::: CC: 0day robot <fengguang.wu@intel.com>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c index fe414e7a9c78..96786f5ede0b 100644 --- a/drivers/usb/dwc3/dwc3-of-simple.c +++ b/drivers/usb/dwc3/dwc3-of-simple.c @@ -29,13 +29,48 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/pm_runtime.h> +#include <linux/reset.h> struct dwc3_of_simple { struct device *dev; struct clk **clks; int num_clocks; + int num_resets; + struct reset_control_array *resets; }; +static int dwc3_of_simple_reset_init(struct dwc3_of_simple *simple, int count) +{ + struct device *dev = simple->dev; + int ret; + + /* Not all platforms have resets, so don't return a failure */ + if (count < 0) + return 0; + + simple->num_resets = count; + + simple->resets = devm_kcalloc(dev, count, sizeof(simple->resets), + GFP_KERNEL); + if (!simple->resets) + return -ENOMEM; + + ret = of_reset_control_array_get_exclusive(dev->of_node, count, + simple->resets); + if (ret) { + dev_err(dev, "failed to get device resets\n"); + return ret; + } + + ret = reset_control_array_deassert(count, simple->resets); + if (ret) { + reset_control_array_put(count, simple->resets); + return ret; + } + + return 0; +} + static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count) { struct device *dev = simple->dev; @@ -100,6 +135,10 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) if (ret) return ret; + ret = dwc3_of_simple_reset_init(simple, of_reset_control_get_count(np)); + if (ret) + return ret; + ret = of_platform_populate(np, NULL, NULL, dev); if (ret) { for (i = 0; i < simple->num_clocks; i++) { @@ -107,6 +146,9 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) clk_put(simple->clks[i]); } + reset_control_array_assert(simple->num_resets, simple->resets); + reset_control_array_put(simple->num_resets, simple->resets); + return ret; } @@ -128,6 +170,9 @@ static int dwc3_of_simple_remove(struct platform_device *pdev) clk_put(simple->clks[i]); } + reset_control_array_assert(simple->num_resets, simple->resets); + reset_control_array_put(simple->num_resets, simple->resets); + of_platform_depopulate(dev); pm_runtime_put_sync(dev);
Add support to get a list of resets available for the device. These resets must be kept de-asserted until the device is in use. Cc: Felipe Balbi <balbi@kernel.org> Cc: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> --- Changes since v1: - Using new APIs for reset control array. - Using the *_get_exclusive() API. - Added reset_control_array_put() to error and driver removal path. drivers/usb/dwc3/dwc3-of-simple.c | 45 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)