[RFC 3/5] ARM: OMAP2+: Add AM3517 MUSB setup to pdata quirks.
From: Adam Ford <hidden>
Date: 2018-06-25 00:12:31
Also in:
linux-devicetree, linux-omap, linux-usb
Subsystem:
arm port, omap2+ support, the rest · Maintainers:
Russell King, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
The pin muxing and clock definitions for the MUSB controller are not done through the same registers/pin mux options, so this explicitly configures the registers and pin-mux options for MUSB on AM3517-EVM Signed-off-by: Adam Ford <redacted>
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 7f02743edbe4..e0c7ac2c87c1 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c@@ -258,9 +258,28 @@ static void __init omap3_sbc_t3517_legacy_init(void) omap3_sbc_t3517_wifi_init(); } +/* The pin muxing for AM3517 OTG isn't done through the normal means */ +static __init void am3517_evm_musb_init(void) +{ + u32 devconf2; + + /* + * Set up USB clock/mode in the DEVCONF2 register. + */ + devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); + + /* USB2.0 PHY reference clock is 13 MHz */ + devconf2 &= ~(CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE); + devconf2 |= CONF2_REFFREQ_13MHZ | CONF2_SESENDEN | CONF2_VBDTCTEN + | CONF2_DATPOL; + + omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); +} + static void __init am3517_evm_legacy_init(void) { am35xx_emac_reset(); + am3517_evm_musb_init(); } static struct platform_device omap3_rom_rng_device = {
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2.17.1