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ARM: davinci: da850: model the SATA refclk

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Register a fixed rate clock modelling the external SATA oscillator
for da850 (both DT and board file mode).

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Bartosz Golaszewski 2017-01-30 11:02:03 +01:00 committed by Sekhar Nori
parent 8ba0f6caa4
commit 00bacfbfaf
3 changed files with 38 additions and 0 deletions
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8
arch/arm/mach-davinci/da8xx-dt.c
View File

@ -50,6 +50,9 @@ static struct of_dev_auxdata da850_auxdata_lookup[] __initdata = {
static void __init da850_init_machine(void)
{
/* All existing boards use 100MHz SATA refclkpn */
static const unsigned long sata_refclkpn = 100 * 1000 * 1000;
int ret;
ret = da8xx_register_usb20_phy_clk(false);
@ -61,6 +64,11 @@ static void __init da850_init_machine(void)
pr_warn("%s: registering USB 1.1 PHY clock failed: %d",
__func__, ret);
ret = da850_register_sata_refclk(sata_refclkpn);
if (ret)
pr_warn("%s: registering SATA REFCLK failed: %d",
__func__, ret);
of_platform_default_populate(NULL, da850_auxdata_lookup, NULL);
davinci_pm_init();
pdata_quirks_init();

29
arch/arm/mach-davinci/devices-da8xx.c
View File

@ -24,6 +24,7 @@
#include <mach/common.h>
#include <mach/time.h>
#include <mach/da8xx.h>
#include <mach/clock.h>
#include "cpuidle.h"
#include "sram.h"
@ -1023,6 +1024,28 @@ int __init da8xx_register_spi_bus(int instance, unsigned num_chipselect)
}
#ifdef CONFIG_ARCH_DAVINCI_DA850
static struct clk sata_refclk = {
.name = "sata_refclk",
.set_rate = davinci_simple_set_rate,
};
static struct clk_lookup sata_refclk_lookup =
CLK("ahci_da850", "refclk", &sata_refclk);
int __init da850_register_sata_refclk(int rate)
{
int ret;
sata_refclk.rate = rate;
ret = clk_register(&sata_refclk);
if (ret)
return ret;
clkdev_add(&sata_refclk_lookup);
return 0;
}
static struct resource da850_sata_resources[] = {
{
.start = DA850_SATA_BASE,
@ -1055,9 +1078,15 @@ static struct platform_device da850_sata_device = {
int __init da850_register_sata(unsigned long refclkpn)
{
int ret;
/* please see comment in drivers/ata/ahci_da850.c */
BUG_ON(refclkpn != 100 * 1000 * 1000);
ret = da850_register_sata_refclk(refclkpn);
if (ret)
return ret;
return platform_device_register(&da850_sata_device);
}
#endif

1
arch/arm/mach-davinci/include/mach/da8xx.h
View File

@ -95,6 +95,7 @@ int da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata);
int da8xx_register_usb_refclkin(int rate);
int da8xx_register_usb20_phy_clk(bool use_usb_refclkin);
int da8xx_register_usb11_phy_clk(bool use_usb_refclkin);
int da850_register_sata_refclk(int rate);
int da8xx_register_emac(void);
int da8xx_register_uio_pruss(void);
int da8xx_register_lcdc(struct da8xx_lcdc_platform_data *pdata);