[PATCH] phy: cadence: Sierra: Do not modify register when getting parent clock

[kernel test robot]

Hi Gregory,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 11439c4635edd669ae435eec308f4ab8a0804808]

url:    https://github.com/intel-lab-lkp/linux/commits/Gregory-CLEMENT/phy-cadence-Sierra-Do-not-modify-register-when-getting-parent-clock/20260306-000915
base:   11439c4635edd669ae435eec308f4ab8a0804808
patch link:    https://lore.kernel.org/r/20260305-fix_sierra_get_parent-v1-1-a7c18e9e6c58%40bootlin.com
patch subject: [PATCH] phy: cadence: Sierra: Do not modify register when getting parent clock
config: xtensa-randconfig-001-20260306 (https://download.01.org/0day-ci/archive/20260306/202603061235.hrl27Jvj-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260306/202603061235.hrl27Jvj-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603061235.hrl27Jvj-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/phy/cadence/phy-cadence-sierra.c: In function 'cdns_sierra_pll_mux_get_parent':
>> drivers/phy/cadence/phy-cadence-sierra.c:702:23: warning: unused variable 'termen_field' [-Wunused-variable]
     struct regmap_field *termen_field = mux->termen_field;
                          ^~~~~~~~~~~~
>> drivers/phy/cadence/phy-cadence-sierra.c:701:23: warning: unused variable 'plllc1en_field' [-Wunused-variable]
     struct regmap_field *plllc1en_field = mux->plllc1en_field;
                          ^~~~~~~~~~~~~~


vim +/termen_field +702 drivers/phy/cadence/phy-cadence-sierra.c

d88ca22d6f0c924 Aswath Govindraju      2022-01-28  697  
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  698  static u8 cdns_sierra_pll_mux_get_parent(struct clk_hw *hw)
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  699  {
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  700  	struct cdns_sierra_pll_mux *mux = to_cdns_sierra_pll_mux(hw);
da08aab940092a0 Swapnil Jakhade        2021-12-23 @701  	struct regmap_field *plllc1en_field = mux->plllc1en_field;
da08aab940092a0 Swapnil Jakhade        2021-12-23 @702  	struct regmap_field *termen_field = mux->termen_field;
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  703  	struct regmap_field *field = mux->pfdclk_sel_preg;
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  704  	unsigned int val;
da08aab940092a0 Swapnil Jakhade        2021-12-23  705  	int index;
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  706  
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  707  	regmap_field_read(field, &val);
da08aab940092a0 Swapnil Jakhade        2021-12-23  708  
4f20466dcc453ec Gregory CLEMENT        2026-03-05  709  	if (strstr(clk_hw_get_name(hw), clk_names[CDNS_SIERRA_PLL_CMNLC1]))
da08aab940092a0 Swapnil Jakhade        2021-12-23  710  		index = clk_mux_val_to_index(hw, cdns_sierra_pll_mux_table[CMN_PLLLC1], 0, val);
4f20466dcc453ec Gregory CLEMENT        2026-03-05  711  	else
da08aab940092a0 Swapnil Jakhade        2021-12-23  712  		index = clk_mux_val_to_index(hw, cdns_sierra_pll_mux_table[CMN_PLLLC], 0, val);
da08aab940092a0 Swapnil Jakhade        2021-12-23  713  
da08aab940092a0 Swapnil Jakhade        2021-12-23  714  	return index;
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  715  }
28081b72859f0fa Kishon Vijay Abraham I 2021-03-19  716  

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