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MIPS: BCM63XX: add clkdev lookup support 

Enable clkdev lookup support to allow us providing clocks under
different names to devices more easily, so we don't need to care
about clock name clashes anymore.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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: 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/17325/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: James Hogan <jhogan@kernel.org>
hifive-unleashed-5.1
Jonas Gorski 2017-09-20 13:14:01 +02:00 committed by James Hogan
parent c05afeec17
commit c5af3c2dd0
2 changed files with 116 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/mips/Kconfig
View File

@ -275,6 +275,7 @@ config BCM63XX
select GPIOLIB
select HAVE_CLK
select MIPS_L1_CACHE_SHIFT_4
select CLKDEV_LOOKUP
help
Support for BCM63XX based boards

150
arch/mips/bcm63xx/clk.c
View File

@ -11,6 +11,7 @@
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/delay.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_io.h>
@ -359,44 +360,103 @@ long clk_round_rate(struct clk *clk, unsigned long rate)
}
EXPORT_SYMBOL_GPL(clk_round_rate);
struct clk *clk_get(struct device *dev, const char *id)
{
if (!strcmp(id, "enet0"))
return &clk_enet0;
if (!strcmp(id, "enet1"))
return &clk_enet1;
if (!strcmp(id, "enetsw"))
return &clk_enetsw;
if (!strcmp(id, "ephy"))
return &clk_ephy;
if (!strcmp(id, "usbh"))
return &clk_usbh;
if (!strcmp(id, "usbd"))
return &clk_usbd;
if (!strcmp(id, "spi"))
return &clk_spi;
if (!strcmp(id, "hsspi"))
return &clk_hsspi;
if (!strcmp(id, "xtm"))
return &clk_xtm;
if (!strcmp(id, "periph"))
return &clk_periph;
if ((BCMCPU_IS_3368() || BCMCPU_IS_6358()) && !strcmp(id, "pcm"))
return &clk_pcm;
if ((BCMCPU_IS_6362() || BCMCPU_IS_6368()) && !strcmp(id, "ipsec"))
return &clk_ipsec;
if ((BCMCPU_IS_6328() || BCMCPU_IS_6362()) && !strcmp(id, "pcie"))
return &clk_pcie;
return ERR_PTR(-ENOENT);
}
static struct clk_lookup bcm3368_clks[] = {
/* fixed rate clocks */
CLKDEV_INIT(NULL, "periph", &clk_periph),
/* gated clocks */
CLKDEV_INIT(NULL, "enet0", &clk_enet0),
CLKDEV_INIT(NULL, "enet1", &clk_enet1),
CLKDEV_INIT(NULL, "ephy", &clk_ephy),
CLKDEV_INIT(NULL, "usbh", &clk_usbh),
CLKDEV_INIT(NULL, "usbd", &clk_usbd),
CLKDEV_INIT(NULL, "spi", &clk_spi),
CLKDEV_INIT(NULL, "pcm", &clk_pcm),
};
EXPORT_SYMBOL(clk_get);
static struct clk_lookup bcm6328_clks[] = {
/* fixed rate clocks */
CLKDEV_INIT(NULL, "periph", &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, "hsspi", &clk_hsspi),
CLKDEV_INIT(NULL, "pcie", &clk_pcie),
};
void clk_put(struct clk *clk)
{
}
static struct clk_lookup bcm6338_clks[] = {
/* fixed rate clocks */
CLKDEV_INIT(NULL, "periph", &clk_periph),
/* gated clocks */
CLKDEV_INIT(NULL, "enet0", &clk_enet0),
CLKDEV_INIT(NULL, "enet1", &clk_enet1),
CLKDEV_INIT(NULL, "ephy", &clk_ephy),
CLKDEV_INIT(NULL, "usbh", &clk_usbh),
CLKDEV_INIT(NULL, "usbd", &clk_usbd),
CLKDEV_INIT(NULL, "spi", &clk_spi),
};
EXPORT_SYMBOL(clk_put);
static struct clk_lookup bcm6345_clks[] = {
/* fixed rate clocks */
CLKDEV_INIT(NULL, "periph", &clk_periph),
/* gated clocks */
CLKDEV_INIT(NULL, "enet0", &clk_enet0),
CLKDEV_INIT(NULL, "enet1", &clk_enet1),
CLKDEV_INIT(NULL, "ephy", &clk_ephy),
CLKDEV_INIT(NULL, "usbh", &clk_usbh),
CLKDEV_INIT(NULL, "usbd", &clk_usbd),
CLKDEV_INIT(NULL, "spi", &clk_spi),
};
static struct clk_lookup bcm6348_clks[] = {
/* fixed rate clocks */
CLKDEV_INIT(NULL, "periph", &clk_periph),
/* gated clocks */
CLKDEV_INIT(NULL, "enet0", &clk_enet0),
CLKDEV_INIT(NULL, "enet1", &clk_enet1),
CLKDEV_INIT(NULL, "ephy", &clk_ephy),
CLKDEV_INIT(NULL, "usbh", &clk_usbh),
CLKDEV_INIT(NULL, "usbd", &clk_usbd),
CLKDEV_INIT(NULL, "spi", &clk_spi),
};
static struct clk_lookup bcm6358_clks[] = {
/* fixed rate clocks */
CLKDEV_INIT(NULL, "periph", &clk_periph),
/* gated clocks */
CLKDEV_INIT(NULL, "enet0", &clk_enet0),
CLKDEV_INIT(NULL, "enet1", &clk_enet1),
CLKDEV_INIT(NULL, "ephy", &clk_ephy),
CLKDEV_INIT(NULL, "usbh", &clk_usbh),
CLKDEV_INIT(NULL, "usbd", &clk_usbd),
CLKDEV_INIT(NULL, "spi", &clk_spi),
CLKDEV_INIT(NULL, "pcm", &clk_pcm),
};
static struct clk_lookup bcm6362_clks[] = {
/* fixed rate clocks */
CLKDEV_INIT(NULL, "periph", &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, "hsspi", &clk_hsspi),
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),
/* 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
@ -404,11 +464,31 @@ EXPORT_SYMBOL(clk_put);
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.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.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;
}