forked from Minki/linux
072916f55d
Make the secondary switch clocks their own clocks. This allows proper enable reference counting between SAR/XTM and the main switch clocks, and controlling them individually from drivers. Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Russell King <linux@armlinux.org.uk> Cc: linux-mips@linux-mips.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-serial@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: bcm-kernel-feedback-list@broadcom.com Patchwork: https://patchwork.linux-mips.org/patch/17332/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: James Hogan <jhogan@kernel.org>
566 lines
12 KiB
C
566 lines
12 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/mutex.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <linux/delay.h>
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#include <bcm63xx_cpu.h>
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#include <bcm63xx_io.h>
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#include <bcm63xx_regs.h>
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#include <bcm63xx_reset.h>
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struct clk {
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void (*set)(struct clk *, int);
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unsigned int rate;
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unsigned int usage;
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int id;
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};
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static DEFINE_MUTEX(clocks_mutex);
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static void clk_enable_unlocked(struct clk *clk)
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{
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if (clk->set && (clk->usage++) == 0)
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clk->set(clk, 1);
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}
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static void clk_disable_unlocked(struct clk *clk)
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{
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if (clk->set && (--clk->usage) == 0)
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clk->set(clk, 0);
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}
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static void bcm_hwclock_set(u32 mask, int enable)
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{
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u32 reg;
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reg = bcm_perf_readl(PERF_CKCTL_REG);
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if (enable)
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reg |= mask;
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else
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reg &= ~mask;
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bcm_perf_writel(reg, PERF_CKCTL_REG);
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}
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/*
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* Ethernet MAC "misc" clock: dma clocks and main clock on 6348
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*/
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static void enet_misc_set(struct clk *clk, int enable)
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{
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u32 mask;
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if (BCMCPU_IS_6338())
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mask = CKCTL_6338_ENET_EN;
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else if (BCMCPU_IS_6345())
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mask = CKCTL_6345_ENET_EN;
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else if (BCMCPU_IS_6348())
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mask = CKCTL_6348_ENET_EN;
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else
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/* BCMCPU_IS_6358 */
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mask = CKCTL_6358_EMUSB_EN;
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bcm_hwclock_set(mask, enable);
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}
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static struct clk clk_enet_misc = {
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.set = enet_misc_set,
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};
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/*
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* Ethernet MAC clocks: only revelant on 6358, silently enable misc
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* clocks
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*/
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static void enetx_set(struct clk *clk, int enable)
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{
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if (enable)
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clk_enable_unlocked(&clk_enet_misc);
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else
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clk_disable_unlocked(&clk_enet_misc);
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if (BCMCPU_IS_3368() || BCMCPU_IS_6358()) {
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u32 mask;
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if (clk->id == 0)
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mask = CKCTL_6358_ENET0_EN;
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else
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mask = CKCTL_6358_ENET1_EN;
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bcm_hwclock_set(mask, enable);
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}
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}
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static struct clk clk_enet0 = {
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.id = 0,
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.set = enetx_set,
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};
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static struct clk clk_enet1 = {
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.id = 1,
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.set = enetx_set,
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};
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/*
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* Ethernet PHY clock
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*/
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static void ephy_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_3368() || BCMCPU_IS_6358())
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bcm_hwclock_set(CKCTL_6358_EPHY_EN, enable);
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}
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static struct clk clk_ephy = {
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.set = ephy_set,
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};
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/*
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* Ethernet switch SAR clock
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*/
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static void swpkt_sar_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_6368())
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bcm_hwclock_set(CKCTL_6368_SWPKT_SAR_EN, enable);
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else
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return;
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}
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static struct clk clk_swpkt_sar = {
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.set = swpkt_sar_set,
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};
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/*
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* Ethernet switch USB clock
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*/
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static void swpkt_usb_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_6368())
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bcm_hwclock_set(CKCTL_6368_SWPKT_USB_EN, enable);
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else
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return;
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}
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static struct clk clk_swpkt_usb = {
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.set = swpkt_usb_set,
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};
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/*
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* Ethernet switch clock
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*/
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static void enetsw_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_6328()) {
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bcm_hwclock_set(CKCTL_6328_ROBOSW_EN, enable);
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} else if (BCMCPU_IS_6362()) {
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bcm_hwclock_set(CKCTL_6362_ROBOSW_EN, enable);
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} else if (BCMCPU_IS_6368()) {
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if (enable) {
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clk_enable_unlocked(&clk_swpkt_sar);
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clk_enable_unlocked(&clk_swpkt_usb);
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} else {
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clk_disable_unlocked(&clk_swpkt_usb);
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clk_disable_unlocked(&clk_swpkt_sar);
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}
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bcm_hwclock_set(CKCTL_6368_ROBOSW_EN, enable);
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} else {
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return;
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}
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if (enable) {
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/* reset switch core afer clock change */
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bcm63xx_core_set_reset(BCM63XX_RESET_ENETSW, 1);
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msleep(10);
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bcm63xx_core_set_reset(BCM63XX_RESET_ENETSW, 0);
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msleep(10);
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}
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}
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static struct clk clk_enetsw = {
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.set = enetsw_set,
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};
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/*
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* PCM clock
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*/
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static void pcm_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_3368())
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bcm_hwclock_set(CKCTL_3368_PCM_EN, enable);
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if (BCMCPU_IS_6358())
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bcm_hwclock_set(CKCTL_6358_PCM_EN, enable);
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}
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static struct clk clk_pcm = {
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.set = pcm_set,
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};
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/*
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* USB host clock
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*/
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static void usbh_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_6328())
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bcm_hwclock_set(CKCTL_6328_USBH_EN, enable);
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else if (BCMCPU_IS_6348())
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bcm_hwclock_set(CKCTL_6348_USBH_EN, enable);
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else if (BCMCPU_IS_6362())
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bcm_hwclock_set(CKCTL_6362_USBH_EN, enable);
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else if (BCMCPU_IS_6368())
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bcm_hwclock_set(CKCTL_6368_USBH_EN, enable);
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}
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static struct clk clk_usbh = {
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.set = usbh_set,
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};
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/*
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* USB device clock
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*/
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static void usbd_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_6328())
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bcm_hwclock_set(CKCTL_6328_USBD_EN, enable);
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else if (BCMCPU_IS_6362())
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bcm_hwclock_set(CKCTL_6362_USBD_EN, enable);
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else if (BCMCPU_IS_6368())
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bcm_hwclock_set(CKCTL_6368_USBD_EN, enable);
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}
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static struct clk clk_usbd = {
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.set = usbd_set,
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};
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/*
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* SPI clock
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*/
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static void spi_set(struct clk *clk, int enable)
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{
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u32 mask;
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if (BCMCPU_IS_6338())
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mask = CKCTL_6338_SPI_EN;
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else if (BCMCPU_IS_6348())
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mask = CKCTL_6348_SPI_EN;
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else if (BCMCPU_IS_3368() || BCMCPU_IS_6358())
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mask = CKCTL_6358_SPI_EN;
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else if (BCMCPU_IS_6362())
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mask = CKCTL_6362_SPI_EN;
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else
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/* BCMCPU_IS_6368 */
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mask = CKCTL_6368_SPI_EN;
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bcm_hwclock_set(mask, enable);
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}
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static struct clk clk_spi = {
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.set = spi_set,
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};
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/*
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* HSSPI clock
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*/
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static void hsspi_set(struct clk *clk, int enable)
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{
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u32 mask;
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if (BCMCPU_IS_6328())
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mask = CKCTL_6328_HSSPI_EN;
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else if (BCMCPU_IS_6362())
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mask = CKCTL_6362_HSSPI_EN;
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else
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return;
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bcm_hwclock_set(mask, enable);
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}
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static struct clk clk_hsspi = {
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.set = hsspi_set,
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};
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/*
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* HSSPI PLL
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*/
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static struct clk clk_hsspi_pll;
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/*
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* XTM clock
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*/
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static void xtm_set(struct clk *clk, int enable)
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{
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if (!BCMCPU_IS_6368())
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return;
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if (enable)
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clk_enable_unlocked(&clk_swpkt_sar);
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else
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clk_disable_unlocked(&clk_swpkt_sar);
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bcm_hwclock_set(CKCTL_6368_SAR_EN, enable);
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if (enable) {
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/* reset sar core afer clock change */
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bcm63xx_core_set_reset(BCM63XX_RESET_SAR, 1);
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mdelay(1);
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bcm63xx_core_set_reset(BCM63XX_RESET_SAR, 0);
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mdelay(1);
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}
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}
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static struct clk clk_xtm = {
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.set = xtm_set,
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};
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/*
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* IPsec clock
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*/
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static void ipsec_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_6362())
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bcm_hwclock_set(CKCTL_6362_IPSEC_EN, enable);
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else if (BCMCPU_IS_6368())
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bcm_hwclock_set(CKCTL_6368_IPSEC_EN, enable);
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}
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static struct clk clk_ipsec = {
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.set = ipsec_set,
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};
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/*
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* PCIe clock
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*/
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static void pcie_set(struct clk *clk, int enable)
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{
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if (BCMCPU_IS_6328())
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bcm_hwclock_set(CKCTL_6328_PCIE_EN, enable);
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else if (BCMCPU_IS_6362())
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bcm_hwclock_set(CKCTL_6362_PCIE_EN, enable);
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}
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static struct clk clk_pcie = {
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.set = pcie_set,
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};
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/*
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* Internal peripheral clock
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*/
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static struct clk clk_periph = {
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.rate = (50 * 1000 * 1000),
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};
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/*
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* Linux clock API implementation
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*/
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int clk_enable(struct clk *clk)
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{
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mutex_lock(&clocks_mutex);
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clk_enable_unlocked(clk);
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mutex_unlock(&clocks_mutex);
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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if (!clk)
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return;
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mutex_lock(&clocks_mutex);
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clk_disable_unlocked(clk);
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mutex_unlock(&clocks_mutex);
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}
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EXPORT_SYMBOL(clk_disable);
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unsigned long clk_get_rate(struct clk *clk)
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{
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if (!clk)
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return 0;
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return clk->rate;
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}
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EXPORT_SYMBOL(clk_get_rate);
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int clk_set_rate(struct clk *clk, unsigned long rate)
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{
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return 0;
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}
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EXPORT_SYMBOL_GPL(clk_set_rate);
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long clk_round_rate(struct clk *clk, unsigned long rate)
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{
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return 0;
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}
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EXPORT_SYMBOL_GPL(clk_round_rate);
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static struct clk_lookup bcm3368_clks[] = {
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/* fixed rate clocks */
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CLKDEV_INIT(NULL, "periph", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
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/* gated clocks */
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CLKDEV_INIT(NULL, "enet0", &clk_enet0),
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CLKDEV_INIT(NULL, "enet1", &clk_enet1),
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CLKDEV_INIT(NULL, "ephy", &clk_ephy),
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CLKDEV_INIT(NULL, "usbh", &clk_usbh),
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CLKDEV_INIT(NULL, "usbd", &clk_usbd),
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CLKDEV_INIT(NULL, "spi", &clk_spi),
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CLKDEV_INIT(NULL, "pcm", &clk_pcm),
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CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet0),
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CLKDEV_INIT("bcm63xx_enet.1", "enet", &clk_enet1),
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};
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static struct clk_lookup bcm6328_clks[] = {
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/* fixed rate clocks */
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CLKDEV_INIT(NULL, "periph", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
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CLKDEV_INIT("bcm63xx-hsspi.0", "pll", &clk_hsspi_pll),
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/* gated clocks */
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CLKDEV_INIT(NULL, "enetsw", &clk_enetsw),
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CLKDEV_INIT(NULL, "usbh", &clk_usbh),
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CLKDEV_INIT(NULL, "usbd", &clk_usbd),
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CLKDEV_INIT(NULL, "hsspi", &clk_hsspi),
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CLKDEV_INIT(NULL, "pcie", &clk_pcie),
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};
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static struct clk_lookup bcm6338_clks[] = {
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/* fixed rate clocks */
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CLKDEV_INIT(NULL, "periph", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
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/* gated clocks */
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CLKDEV_INIT(NULL, "enet0", &clk_enet0),
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CLKDEV_INIT(NULL, "enet1", &clk_enet1),
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CLKDEV_INIT(NULL, "ephy", &clk_ephy),
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CLKDEV_INIT(NULL, "usbh", &clk_usbh),
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CLKDEV_INIT(NULL, "usbd", &clk_usbd),
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CLKDEV_INIT(NULL, "spi", &clk_spi),
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CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet_misc),
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};
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static struct clk_lookup bcm6345_clks[] = {
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/* fixed rate clocks */
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CLKDEV_INIT(NULL, "periph", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
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/* gated clocks */
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CLKDEV_INIT(NULL, "enet0", &clk_enet0),
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CLKDEV_INIT(NULL, "enet1", &clk_enet1),
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CLKDEV_INIT(NULL, "ephy", &clk_ephy),
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CLKDEV_INIT(NULL, "usbh", &clk_usbh),
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CLKDEV_INIT(NULL, "usbd", &clk_usbd),
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CLKDEV_INIT(NULL, "spi", &clk_spi),
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CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet_misc),
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};
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static struct clk_lookup bcm6348_clks[] = {
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/* fixed rate clocks */
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CLKDEV_INIT(NULL, "periph", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
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/* gated clocks */
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CLKDEV_INIT(NULL, "enet0", &clk_enet0),
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CLKDEV_INIT(NULL, "enet1", &clk_enet1),
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CLKDEV_INIT(NULL, "ephy", &clk_ephy),
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CLKDEV_INIT(NULL, "usbh", &clk_usbh),
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CLKDEV_INIT(NULL, "usbd", &clk_usbd),
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CLKDEV_INIT(NULL, "spi", &clk_spi),
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CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet_misc),
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CLKDEV_INIT("bcm63xx_enet.1", "enet", &clk_enet_misc),
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};
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|
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static struct clk_lookup bcm6358_clks[] = {
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/* fixed rate clocks */
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CLKDEV_INIT(NULL, "periph", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
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/* gated clocks */
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CLKDEV_INIT(NULL, "enet0", &clk_enet0),
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CLKDEV_INIT(NULL, "enet1", &clk_enet1),
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CLKDEV_INIT(NULL, "ephy", &clk_ephy),
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CLKDEV_INIT(NULL, "usbh", &clk_usbh),
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CLKDEV_INIT(NULL, "usbd", &clk_usbd),
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CLKDEV_INIT(NULL, "spi", &clk_spi),
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CLKDEV_INIT(NULL, "pcm", &clk_pcm),
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CLKDEV_INIT(NULL, "swpkt_sar", &clk_swpkt_sar),
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CLKDEV_INIT(NULL, "swpkt_usb", &clk_swpkt_usb),
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CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet0),
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CLKDEV_INIT("bcm63xx_enet.1", "enet", &clk_enet1),
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};
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|
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|
static struct clk_lookup bcm6362_clks[] = {
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/* fixed rate clocks */
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|
CLKDEV_INIT(NULL, "periph", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
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CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
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CLKDEV_INIT("bcm63xx-hsspi.0", "pll", &clk_hsspi_pll),
|
|
/* gated clocks */
|
|
CLKDEV_INIT(NULL, "enetsw", &clk_enetsw),
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|
CLKDEV_INIT(NULL, "usbh", &clk_usbh),
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|
CLKDEV_INIT(NULL, "usbd", &clk_usbd),
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|
CLKDEV_INIT(NULL, "spi", &clk_spi),
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|
CLKDEV_INIT(NULL, "hsspi", &clk_hsspi),
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|
CLKDEV_INIT(NULL, "pcie", &clk_pcie),
|
|
CLKDEV_INIT(NULL, "ipsec", &clk_ipsec),
|
|
};
|
|
|
|
static struct clk_lookup bcm6368_clks[] = {
|
|
/* fixed rate clocks */
|
|
CLKDEV_INIT(NULL, "periph", &clk_periph),
|
|
CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
|
|
CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
|
|
/* gated clocks */
|
|
CLKDEV_INIT(NULL, "enetsw", &clk_enetsw),
|
|
CLKDEV_INIT(NULL, "usbh", &clk_usbh),
|
|
CLKDEV_INIT(NULL, "usbd", &clk_usbd),
|
|
CLKDEV_INIT(NULL, "spi", &clk_spi),
|
|
CLKDEV_INIT(NULL, "xtm", &clk_xtm),
|
|
CLKDEV_INIT(NULL, "ipsec", &clk_ipsec),
|
|
};
|
|
|
|
#define HSSPI_PLL_HZ_6328 133333333
|
|
#define HSSPI_PLL_HZ_6362 400000000
|
|
|
|
static int __init bcm63xx_clk_init(void)
|
|
{
|
|
switch (bcm63xx_get_cpu_id()) {
|
|
case BCM3368_CPU_ID:
|
|
clkdev_add_table(bcm3368_clks, ARRAY_SIZE(bcm3368_clks));
|
|
break;
|
|
case BCM6328_CPU_ID:
|
|
clk_hsspi_pll.rate = HSSPI_PLL_HZ_6328;
|
|
clkdev_add_table(bcm6328_clks, ARRAY_SIZE(bcm6328_clks));
|
|
break;
|
|
case BCM6338_CPU_ID:
|
|
clkdev_add_table(bcm6338_clks, ARRAY_SIZE(bcm6338_clks));
|
|
break;
|
|
case BCM6345_CPU_ID:
|
|
clkdev_add_table(bcm6345_clks, ARRAY_SIZE(bcm6345_clks));
|
|
break;
|
|
case BCM6348_CPU_ID:
|
|
clkdev_add_table(bcm6348_clks, ARRAY_SIZE(bcm6348_clks));
|
|
break;
|
|
case BCM6358_CPU_ID:
|
|
clkdev_add_table(bcm6358_clks, ARRAY_SIZE(bcm6358_clks));
|
|
break;
|
|
case BCM6362_CPU_ID:
|
|
clk_hsspi_pll.rate = HSSPI_PLL_HZ_6362;
|
|
clkdev_add_table(bcm6362_clks, ARRAY_SIZE(bcm6362_clks));
|
|
break;
|
|
case BCM6368_CPU_ID:
|
|
clkdev_add_table(bcm6368_clks, ARRAY_SIZE(bcm6368_clks));
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(bcm63xx_clk_init);
|