diff options
Diffstat (limited to 'arch/arm/mach-omap2/mcbsp.c')
| -rw-r--r-- | arch/arm/mach-omap2/mcbsp.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c index 4c9c999dfa4a..51abcedfde83 100644 --- a/arch/arm/mach-omap2/mcbsp.c +++ b/arch/arm/mach-omap2/mcbsp.c @@ -52,6 +52,54 @@ void omap2_mcbsp1_mux_fsr_src(u8 mux) } EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src); +/* McBSP CLKS source switching function */ + +int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id) +{ + struct omap_mcbsp *mcbsp; + struct clk *fck_src; + char *fck_src_name; + int r; + + if (!omap_mcbsp_check_valid_id(id)) { + pr_err("%s: Invalid id (%d)\n", __func__, id + 1); + return -EINVAL; + } + mcbsp = id_to_mcbsp_ptr(id); + + if (fck_src_id == MCBSP_CLKS_PAD_SRC) + fck_src_name = "pad_fck"; + else if (fck_src_id == MCBSP_CLKS_PRCM_SRC) + fck_src_name = "prcm_fck"; + else + return -EINVAL; + + fck_src = clk_get(mcbsp->dev, fck_src_name); + if (IS_ERR_OR_NULL(fck_src)) { + pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks", + fck_src_name); + return -EINVAL; + } + + clk_disable(mcbsp->fclk); + + r = clk_set_parent(mcbsp->fclk, fck_src); + if (IS_ERR_VALUE(r)) { + pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n", + "clks", fck_src_name); + clk_put(fck_src); + return -EINVAL; + } + + clk_enable(mcbsp->fclk); + + clk_put(fck_src); + + return 0; +} +EXPORT_SYMBOL(omap2_mcbsp_set_clks_src); + + /* Platform data */ #ifdef CONFIG_ARCH_OMAP2420 @@ -190,18 +238,21 @@ static struct omap_mcbsp_platform_data omap44xx_mcbsp_pdata[] = { .dma_rx_sync = OMAP44XX_DMA_MCBSP2_RX, .dma_tx_sync = OMAP44XX_DMA_MCBSP2_TX, .tx_irq = OMAP44XX_IRQ_MCBSP2, + /* XXX .ops ? */ }, { .phys_base = OMAP44XX_MCBSP3_BASE, .dma_rx_sync = OMAP44XX_DMA_MCBSP3_RX, .dma_tx_sync = OMAP44XX_DMA_MCBSP3_TX, .tx_irq = OMAP44XX_IRQ_MCBSP3, + /* XXX .ops ? */ }, { .phys_base = OMAP44XX_MCBSP4_BASE, .dma_rx_sync = OMAP44XX_DMA_MCBSP4_RX, .dma_tx_sync = OMAP44XX_DMA_MCBSP4_TX, .tx_irq = OMAP44XX_IRQ_MCBSP4, + /* XXX .ops ? */ }, }; #define OMAP44XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap44xx_mcbsp_pdata) |