diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index 9ee5bef49e47..da8fa592b071 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -137,9 +137,6 @@ struct tegra_emc { struct device *dev; struct completion clk_handshake_complete; struct notifier_block clk_nb; - struct clk *backup_clk; - struct clk *emc_mux; - struct clk *pll_m; struct clk *clk; void __iomem *regs; @@ -424,41 +421,6 @@ static int emc_setup_hw(struct tegra_emc *emc) return 0; } -static int emc_init(struct tegra_emc *emc, unsigned long rate) -{ - int err; - - err = clk_set_parent(emc->emc_mux, emc->backup_clk); - if (err) { - dev_err(emc->dev, - "failed to reparent to backup source: %d\n", err); - return err; - } - - err = clk_set_rate(emc->pll_m, rate); - if (err) { - dev_err(emc->dev, - "failed to change pll_m rate: %d\n", err); - return err; - } - - err = clk_set_parent(emc->emc_mux, emc->pll_m); - if (err) { - dev_err(emc->dev, - "failed to reparent to pll_m: %d\n", err); - return err; - } - - err = clk_set_rate(emc->clk, rate); - if (err) { - dev_err(emc->dev, - "failed to change emc rate: %d\n", err); - return err; - } - - return 0; -} - static int tegra_emc_probe(struct platform_device *pdev) { struct device_node *np; @@ -522,52 +484,14 @@ static int tegra_emc_probe(struct platform_device *pdev) return err; } - emc->pll_m = clk_get_sys(NULL, "pll_m"); - if (IS_ERR(emc->pll_m)) { - err = PTR_ERR(emc->pll_m); - dev_err(&pdev->dev, "failed to get pll_m clock: %d\n", err); - return err; - } - - emc->backup_clk = clk_get_sys(NULL, "pll_p"); - if (IS_ERR(emc->backup_clk)) { - err = PTR_ERR(emc->backup_clk); - dev_err(&pdev->dev, "failed to get pll_p clock: %d\n", err); - goto put_pll_m; - } - - emc->emc_mux = clk_get_parent(emc->clk); - if (IS_ERR(emc->emc_mux)) { - err = PTR_ERR(emc->emc_mux); - dev_err(&pdev->dev, "failed to get emc_mux clock: %d\n", err); - goto put_backup; - } - err = clk_notifier_register(emc->clk, &emc->clk_nb); if (err) { dev_err(&pdev->dev, "failed to register clk notifier: %d\n", err); - goto put_backup; - } - - /* set DRAM clock rate to maximum */ - err = emc_init(emc, emc->timings[emc->num_timings - 1].rate); - if (err) { - dev_err(&pdev->dev, "failed to initialize EMC clock rate: %d\n", - err); - goto unreg_notifier; + return err; } return 0; - -unreg_notifier: - clk_notifier_unregister(emc->clk, &emc->clk_nb); -put_backup: - clk_put(emc->backup_clk); -put_pll_m: - clk_put(emc->pll_m); - - return err; } static const struct of_device_id tegra_emc_of_match[] = {