From 0cd3be6e9a46f84ef7a42e1a5645d32ad547b12e Mon Sep 17 00:00:00 2001 From: Sebastian Hesselbarth Date: Mon, 4 May 2015 23:04:16 +0200 Subject: clk: si5351: Do not pass struct clk in platform_data When registering clk-si5351 by platform_data, we should not pass struct clk for the reference clocks. Drop struct clk from platform_data and rework the driver to use devm_clk_get of named clock references. While at it, check for at least one valid input clock and properly prepare/ enable valid reference clocks. Signed-off-by: Sebastian Hesselbarth Reported-by: Michael Welling Reported-by: Jean-Francois Moine Reported-by: Russell King Tested-by: Michael Welling Tested-by: Jean-Francois Moine Signed-off-by: Michael Turquette --- drivers/clk/clk-si5351.c | 63 ++++++++++++++++++++++++++++++++++-------------- 1 file changed, 45 insertions(+), 18 deletions(-) (limited to 'drivers') diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c index 44ea107cfc67..30335d3b99af 100644 --- a/drivers/clk/clk-si5351.c +++ b/drivers/clk/clk-si5351.c @@ -1128,13 +1128,6 @@ static int si5351_dt_parse(struct i2c_client *client, if (!pdata) return -ENOMEM; - pdata->clk_xtal = of_clk_get(np, 0); - if (!IS_ERR(pdata->clk_xtal)) - clk_put(pdata->clk_xtal); - pdata->clk_clkin = of_clk_get(np, 1); - if (!IS_ERR(pdata->clk_clkin)) - clk_put(pdata->clk_clkin); - /* * property silabs,pll-source : , [<..>] * allow to selectively set pll source @@ -1328,8 +1321,22 @@ static int si5351_i2c_probe(struct i2c_client *client, i2c_set_clientdata(client, drvdata); drvdata->client = client; drvdata->variant = variant; - drvdata->pxtal = pdata->clk_xtal; - drvdata->pclkin = pdata->clk_clkin; + drvdata->pxtal = devm_clk_get(&client->dev, "xtal"); + drvdata->pclkin = devm_clk_get(&client->dev, "clkin"); + + if (PTR_ERR(drvdata->pxtal) == -EPROBE_DEFER || + PTR_ERR(drvdata->pclkin) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + /* + * Check for valid parent clock: VARIANT_A and VARIANT_B need XTAL, + * VARIANT_C can have CLKIN instead. + */ + if (IS_ERR(drvdata->pxtal) && + (drvdata->variant != SI5351_VARIANT_C || IS_ERR(drvdata->pclkin))) { + dev_err(&client->dev, "missing parent clock\n"); + return -EINVAL; + } drvdata->regmap = devm_regmap_init_i2c(client, &si5351_regmap_config); if (IS_ERR(drvdata->regmap)) { @@ -1393,6 +1400,11 @@ static int si5351_i2c_probe(struct i2c_client *client, } } + if (!IS_ERR(drvdata->pxtal)) + clk_prepare_enable(drvdata->pxtal); + if (!IS_ERR(drvdata->pclkin)) + clk_prepare_enable(drvdata->pclkin); + /* register xtal input clock gate */ memset(&init, 0, sizeof(init)); init.name = si5351_input_names[0]; @@ -1407,7 +1419,8 @@ static int si5351_i2c_probe(struct i2c_client *client, clk = devm_clk_register(&client->dev, &drvdata->xtal); if (IS_ERR(clk)) { dev_err(&client->dev, "unable to register %s\n", init.name); - return PTR_ERR(clk); + ret = PTR_ERR(clk); + goto err_clk; } /* register clkin input clock gate */ @@ -1425,7 +1438,8 @@ static int si5351_i2c_probe(struct i2c_client *client, if (IS_ERR(clk)) { dev_err(&client->dev, "unable to register %s\n", init.name); - return PTR_ERR(clk); + ret = PTR_ERR(clk); + goto err_clk; } } @@ -1447,7 +1461,8 @@ static int si5351_i2c_probe(struct i2c_client *client, clk = devm_clk_register(&client->dev, &drvdata->pll[0].hw); if (IS_ERR(clk)) { dev_err(&client->dev, "unable to register %s\n", init.name); - return -EINVAL; + ret = PTR_ERR(clk); + goto err_clk; } /* register PLLB or VXCO (Si5351B) */ @@ -1471,7 +1486,8 @@ static int si5351_i2c_probe(struct i2c_client *client, clk = devm_clk_register(&client->dev, &drvdata->pll[1].hw); if (IS_ERR(clk)) { dev_err(&client->dev, "unable to register %s\n", init.name); - return -EINVAL; + ret = PTR_ERR(clk); + goto err_clk; } /* register clk multisync and clk out divider */ @@ -1492,8 +1508,10 @@ static int si5351_i2c_probe(struct i2c_client *client, num_clocks * sizeof(*drvdata->onecell.clks), GFP_KERNEL); if (WARN_ON(!drvdata->msynth || !drvdata->clkout || - !drvdata->onecell.clks)) - return -ENOMEM; + !drvdata->onecell.clks)) { + ret = -ENOMEM; + goto err_clk; + } for (n = 0; n < num_clocks; n++) { drvdata->msynth[n].num = n; @@ -1511,7 +1529,8 @@ static int si5351_i2c_probe(struct i2c_client *client, if (IS_ERR(clk)) { dev_err(&client->dev, "unable to register %s\n", init.name); - return -EINVAL; + ret = PTR_ERR(clk); + goto err_clk; } } @@ -1538,7 +1557,8 @@ static int si5351_i2c_probe(struct i2c_client *client, if (IS_ERR(clk)) { dev_err(&client->dev, "unable to register %s\n", init.name); - return -EINVAL; + ret = PTR_ERR(clk); + goto err_clk; } drvdata->onecell.clks[n] = clk; @@ -1557,10 +1577,17 @@ static int si5351_i2c_probe(struct i2c_client *client, &drvdata->onecell); if (ret) { dev_err(&client->dev, "unable to add clk provider\n"); - return ret; + goto err_clk; } return 0; + +err_clk: + if (!IS_ERR(drvdata->pxtal)) + clk_disable_unprepare(drvdata->pxtal); + if (!IS_ERR(drvdata->pclkin)) + clk_disable_unprepare(drvdata->pclkin); + return ret; } static const struct i2c_device_id si5351_i2c_ids[] = { -- cgit v1.2.3