From 65668718f2c5b76d5f4513564a3c56672bb07892 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Tue, 17 Mar 2015 14:21:00 +0800 Subject: usb: chipidea: add ahb burst configuration interface The users can change it through dts or platform data if they want to change the default value. Signed-off-by: Peter Chen --- drivers/usb/chipidea/bits.h | 3 +++ drivers/usb/chipidea/core.c | 14 ++++++++++++++ 2 files changed, 17 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h index 831a8f645ea5..462ad02167b8 100644 --- a/drivers/usb/chipidea/bits.h +++ b/drivers/usb/chipidea/bits.h @@ -25,6 +25,9 @@ #define VERSION (0xF << 25) #define CIVERSION (0x7 << 29) +/* SBUSCFG */ +#define AHBBRST_MASK 0x7 + /* HCCPARAMS */ #define HCCPARAMS_LEN BIT(17) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 7a2c217fb150..ce0489754fde 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -438,6 +438,9 @@ void ci_platform_configure(struct ci_hdrc *ci) hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16); + if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST) + hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK, + ci->platdata->ahb_burst_config); } /** @@ -633,6 +636,17 @@ static int ci_get_platdata(struct device *dev, } } + if (of_find_property(dev->of_node, "ahb-burst-config", NULL)) { + ret = of_property_read_u32(dev->of_node, "ahb-burst-config", + &platdata->ahb_burst_config); + if (ret) { + dev_err(dev, + "failed to get ahb-burst-config\n"); + return ret; + } + platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST; + } + return 0; } -- cgit v1.2.3-58-ga151