From 989ce049997daefc25c15e1d5bf5307cdca25abb Mon Sep 17 00:00:00 2001 From: Darwin Rambo Date: Tue, 11 Feb 2014 11:06:34 -0800 Subject: arch: bcm281xx: Initial commit of bcm281xx architecture code Add bcm281xx architecture support code including a clock framework and chip reset. Define register block base addresses for the bcm281xx architecture and create an empty gpio header file required when CONFIG_CMD_GPIO is set. Signed-off-by: Darwin Rambo Reviewed-by: Steve Rae Reviewed-by: Tim Kryger --- arch/arm/cpu/armv7/bcm281xx/clk-sdio.c | 73 ++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 arch/arm/cpu/armv7/bcm281xx/clk-sdio.c (limited to 'arch/arm/cpu/armv7/bcm281xx/clk-sdio.c') diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-sdio.c b/arch/arm/cpu/armv7/bcm281xx/clk-sdio.c new file mode 100644 index 0000000000..49badcbaa7 --- /dev/null +++ b/arch/arm/cpu/armv7/bcm281xx/clk-sdio.c @@ -0,0 +1,73 @@ +/* + * Copyright 2013 Broadcom Corporation. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include "clk-core.h" + +/* Enable appropriate clocks for an SDIO port */ +int clk_sdio_enable(void *base, u32 rate, u32 *actual_ratep) +{ + int ret; + struct clk *c; + + char *clkstr; + char *slpstr; + char *ahbstr; + + switch ((u32) base) { + case CONFIG_SYS_SDIO_BASE0: + clkstr = CONFIG_SYS_SDIO0 "_clk"; + ahbstr = CONFIG_SYS_SDIO0 "_ahb_clk"; + slpstr = CONFIG_SYS_SDIO0 "_sleep_clk"; + break; + case CONFIG_SYS_SDIO_BASE1: + clkstr = CONFIG_SYS_SDIO1 "_clk"; + ahbstr = CONFIG_SYS_SDIO1 "_ahb_clk"; + slpstr = CONFIG_SYS_SDIO1 "_sleep_clk"; + break; + case CONFIG_SYS_SDIO_BASE2: + clkstr = CONFIG_SYS_SDIO2 "_clk"; + ahbstr = CONFIG_SYS_SDIO2 "_ahb_clk"; + slpstr = CONFIG_SYS_SDIO2 "_sleep_clk"; + break; + case CONFIG_SYS_SDIO_BASE3: + clkstr = CONFIG_SYS_SDIO3 "_clk"; + ahbstr = CONFIG_SYS_SDIO3 "_ahb_clk"; + slpstr = CONFIG_SYS_SDIO3 "_sleep_clk"; + break; + default: + printf("%s: base 0x%p not found\n", __func__, base); + return -EINVAL; + } + + ret = clk_get_and_enable(ahbstr); + if (ret) + return ret; + + ret = clk_get_and_enable(slpstr); + if (ret) + return ret; + + c = clk_get(clkstr); + if (c) { + ret = clk_set_rate(c, rate); + if (ret) + return ret; + + ret = clk_enable(c); + if (ret) + return ret; + } else { + printf("%s: Couldn't find %s\n", __func__, clkstr); + return -EINVAL; + } + *actual_ratep = rate; + return 0; +} -- cgit v1.2.1