diff options
Diffstat (limited to 'arch/arm/mach-omap2/mcbsp.c')
| -rw-r--r-- | arch/arm/mach-omap2/mcbsp.c | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c index 49ff5b80454f..ecc039e794db 100644 --- a/arch/arm/mach-omap2/mcbsp.c +++ b/arch/arm/mach-omap2/mcbsp.c @@ -34,7 +34,7 @@ #include "cm2xxx_3xxx.h" #include "cm-regbits-34xx.h" -/* McBSP internal signal muxing function */ +/* McBSP1 internal signal muxing function for OMAP2/3 */ static int omap2_mcbsp1_mux_rx_clk(struct device *dev, const char *signal, const char *src) { @@ -65,6 +65,42 @@ static int omap2_mcbsp1_mux_rx_clk(struct device *dev, const char *signal, return 0; } +/* McBSP4 internal signal muxing function for OMAP4 */ +#define OMAP4_CONTROL_MCBSPLP_ALBCTRLRX_FSX (1 << 31) +#define OMAP4_CONTROL_MCBSPLP_ALBCTRLRX_CLKX (1 << 30) +static int omap4_mcbsp4_mux_rx_clk(struct device *dev, const char *signal, + const char *src) +{ + u32 v; + + /* + * In CONTROL_MCBSPLP register only bit 30 (CLKR mux), and bit 31 (FSR + * mux) is used */ + v = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_MCBSPLP); + + if (!strcmp(signal, "clkr")) { + if (!strcmp(src, "clkr")) + v &= ~OMAP4_CONTROL_MCBSPLP_ALBCTRLRX_CLKX; + else if (!strcmp(src, "clkx")) + v |= OMAP4_CONTROL_MCBSPLP_ALBCTRLRX_CLKX; + else + return -EINVAL; + } else if (!strcmp(signal, "fsr")) { + if (!strcmp(src, "fsr")) + v &= ~OMAP4_CONTROL_MCBSPLP_ALBCTRLRX_FSX; + else if (!strcmp(src, "fsx")) + v |= OMAP4_CONTROL_MCBSPLP_ALBCTRLRX_FSX; + else + return -EINVAL; + } else { + return -EINVAL; + } + + omap4_ctrl_pad_writel(v, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_MCBSPLP); + + return 0; +} + /* McBSP CLKS source switching function */ static int omap2_mcbsp_set_clk_src(struct device *dev, struct clk *clk, const char *src) @@ -146,9 +182,15 @@ static int omap_init_mcbsp(struct omap_hwmod *oh, void *unused) pdata->has_ccr = true; } pdata->set_clk_src = omap2_mcbsp_set_clk_src; - if (id == 1) + + /* On OMAP2/3 the McBSP1 port has 6 pin configuration */ + if (id == 1 && oh->class->rev < MCBSP_CONFIG_TYPE4) pdata->mux_signal = omap2_mcbsp1_mux_rx_clk; + /* On OMAP4 the McBSP4 port has 6 pin configuration */ + if (id == 4 && oh->class->rev == MCBSP_CONFIG_TYPE4) + pdata->mux_signal = omap4_mcbsp4_mux_rx_clk; + if (oh->class->rev == MCBSP_CONFIG_TYPE3) { if (id == 2) /* The FIFO has 1024 + 256 locations */ |