| Message ID | 1487622236-16901-1-git-send-email-pierre-louis.bossart@linux.intel.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Stephen Boyd |
| Headers | show |
On 2/20/17 2:23 PM, Pierre-Louis Bossart wrote: > Due to timing requirements, TI and Conexant manage the audio > reference clock from their ASoC codec drivers using the "mclk" > string. This patch adds another lookup for the "pmc_plt_clk_3" > clock to avoid Intel-specific tests in those codec drivers and > use code as-is. > > To avoid a leak, clk_add_alias() is not used in this patch. > Instead the lookup is created manually as part of the .probe() > step and dropped in the .remove() step. > > "pmc_plt_clk_3" is used exclusively for audio on all known > Baytrail/CherryTrail designs and is e.g. routed on the MCLK > (pin 26) of the MinnowBoardMAX Turbot LSE connector. > > Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Was there any objection or feedback on this patch? The functionality is needed for a couple of audio drivers from Conexant and Dialog initially written for ARM platforms. Thanks -Pierre > --- > drivers/clk/x86/clk-pmc-atom.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/clk/x86/clk-pmc-atom.c b/drivers/clk/x86/clk-pmc-atom.c > index 2b60577..fafc991 100644 > --- a/drivers/clk/x86/clk-pmc-atom.c > +++ b/drivers/clk/x86/clk-pmc-atom.c > @@ -54,6 +54,7 @@ struct clk_plt_data { > struct clk_plt_fixed **parents; > u8 nparents; > struct clk_plt *clks[PMC_CLK_NUM]; > + struct clk_lookup *mclk_lookup; > }; > > /* Return an index in parent table */ > @@ -337,6 +338,11 @@ static int plt_clk_probe(struct platform_device *pdev) > goto err_unreg_clk_plt; > } > } > + data->mclk_lookup = clkdev_hw_create(&data->clks[3]->hw, "mclk", NULL); > + if (IS_ERR(data->mclk_lookup)) { > + err = PTR_ERR(data->mclk_lookup); > + goto err_unreg_clk_plt; > + } > > plt_clk_free_parent_names_loop(parent_names, data->nparents); > > @@ -356,6 +362,7 @@ static int plt_clk_remove(struct platform_device *pdev) > > data = platform_get_drvdata(pdev); > > + clkdev_drop(data->mclk_lookup); > plt_clk_unregister_loop(data, PMC_CLK_NUM); > plt_clk_unregister_parents(data); > return 0; > -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 02/20, Pierre-Louis Bossart wrote: > Due to timing requirements, TI and Conexant manage the audio > reference clock from their ASoC codec drivers using the "mclk" > string. This patch adds another lookup for the "pmc_plt_clk_3" > clock to avoid Intel-specific tests in those codec drivers and > use code as-is. > > To avoid a leak, clk_add_alias() is not used in this patch. > Instead the lookup is created manually as part of the .probe() > step and dropped in the .remove() step. > > "pmc_plt_clk_3" is used exclusively for audio on all known > Baytrail/CherryTrail designs and is e.g. routed on the MCLK > (pin 26) of the MinnowBoardMAX Turbot LSE connector. > > Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> > --- Applied to clk-next
diff --git a/drivers/clk/x86/clk-pmc-atom.c b/drivers/clk/x86/clk-pmc-atom.c index 2b60577..fafc991 100644 --- a/drivers/clk/x86/clk-pmc-atom.c +++ b/drivers/clk/x86/clk-pmc-atom.c @@ -54,6 +54,7 @@ struct clk_plt_data { struct clk_plt_fixed **parents; u8 nparents; struct clk_plt *clks[PMC_CLK_NUM]; + struct clk_lookup *mclk_lookup; }; /* Return an index in parent table */ @@ -337,6 +338,11 @@ static int plt_clk_probe(struct platform_device *pdev) goto err_unreg_clk_plt; } } + data->mclk_lookup = clkdev_hw_create(&data->clks[3]->hw, "mclk", NULL); + if (IS_ERR(data->mclk_lookup)) { + err = PTR_ERR(data->mclk_lookup); + goto err_unreg_clk_plt; + } plt_clk_free_parent_names_loop(parent_names, data->nparents); @@ -356,6 +362,7 @@ static int plt_clk_remove(struct platform_device *pdev) data = platform_get_drvdata(pdev); + clkdev_drop(data->mclk_lookup); plt_clk_unregister_loop(data, PMC_CLK_NUM); plt_clk_unregister_parents(data); return 0;
Due to timing requirements, TI and Conexant manage the audio reference clock from their ASoC codec drivers using the "mclk" string. This patch adds another lookup for the "pmc_plt_clk_3" clock to avoid Intel-specific tests in those codec drivers and use code as-is. To avoid a leak, clk_add_alias() is not used in this patch. Instead the lookup is created manually as part of the .probe() step and dropped in the .remove() step. "pmc_plt_clk_3" is used exclusively for audio on all known Baytrail/CherryTrail designs and is e.g. routed on the MCLK (pin 26) of the MinnowBoardMAX Turbot LSE connector. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> --- drivers/clk/x86/clk-pmc-atom.c | 7 +++++++ 1 file changed, 7 insertions(+)