From eee989902aab45f0ca2739727ef615420802649c Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Sat, 18 Feb 2012 22:26:42 +0100 Subject: ARM: Orion: SATA: Add per channel clk/clkdev support. The Orion kirkwood chips have a gatable clock per SATA channel. Add code to get and enable this clk if it exists. Signed-off-by: Andrew Lunn Tested-by: Jamie Lentin Signed-off-by: Mike Turquette --- drivers/ata/sata_mv.c | 40 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 36 insertions(+), 4 deletions(-) (limited to 'drivers/ata') diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 7336d4a7ab3..24712adf69d 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -553,6 +553,7 @@ struct mv_host_priv { #if defined(CONFIG_HAVE_CLK) struct clk *clk; + struct clk **port_clks; #endif /* * These consistent DMA memory pools give us guaranteed @@ -4027,6 +4028,9 @@ static int mv_platform_probe(struct platform_device *pdev) struct resource *res; int n_ports = 0; int rc; +#if defined(CONFIG_HAVE_CLK) + int port; +#endif ata_print_version_once(&pdev->dev, DRV_VERSION); @@ -4054,6 +4058,13 @@ static int mv_platform_probe(struct platform_device *pdev) if (!host || !hpriv) return -ENOMEM; +#if defined(CONFIG_HAVE_CLK) + hpriv->port_clks = devm_kzalloc(&pdev->dev, + sizeof(struct clk *) * n_ports, + GFP_KERNEL); + if (!hpriv->port_clks) + return -ENOMEM; +#endif host->private_data = hpriv; hpriv->n_ports = n_ports; hpriv->board_idx = chip_soc; @@ -4066,9 +4077,17 @@ static int mv_platform_probe(struct platform_device *pdev) #if defined(CONFIG_HAVE_CLK) hpriv->clk = clk_get(&pdev->dev, NULL); if (IS_ERR(hpriv->clk)) - dev_notice(&pdev->dev, "cannot get clkdev\n"); + dev_notice(&pdev->dev, "cannot get optional clkdev\n"); else - clk_enable(hpriv->clk); + clk_prepare_enable(hpriv->clk); + + for (port = 0; port < n_ports; port++) { + char port_number[16]; + sprintf(port_number, "%d", port); + hpriv->port_clks[port] = clk_get(&pdev->dev, port_number); + if (!IS_ERR(hpriv->port_clks[port])) + clk_prepare_enable(hpriv->port_clks[port]); + } #endif /* @@ -4098,9 +4117,15 @@ static int mv_platform_probe(struct platform_device *pdev) err: #if defined(CONFIG_HAVE_CLK) if (!IS_ERR(hpriv->clk)) { - clk_disable(hpriv->clk); + clk_disable_unprepare(hpriv->clk); clk_put(hpriv->clk); } + for (port = 0; port < n_ports; port++) { + if (!IS_ERR(hpriv->port_clks[port])) { + clk_disable_unprepare(hpriv->port_clks[port]); + clk_put(hpriv->port_clks[port]); + } + } #endif return rc; @@ -4119,14 +4144,21 @@ static int __devexit mv_platform_remove(struct platform_device *pdev) struct ata_host *host = platform_get_drvdata(pdev); #if defined(CONFIG_HAVE_CLK) struct mv_host_priv *hpriv = host->private_data; + int port; #endif ata_host_detach(host); #if defined(CONFIG_HAVE_CLK) if (!IS_ERR(hpriv->clk)) { - clk_disable(hpriv->clk); + clk_disable_unprepare(hpriv->clk); clk_put(hpriv->clk); } + for (port = 0; port < host->n_ports; port++) { + if (!IS_ERR(hpriv->port_clks[port])) { + clk_disable_unprepare(hpriv->port_clks[port]); + clk_put(hpriv->port_clks[port]); + } + } #endif return 0; } -- cgit v1.2.3