[PATCH v2 06/14] ARM: davinci: da850: model the SATA refclk

From: Bartosz Golaszewski
Date: Tue Jan 17 2017 - 07:29:25 EST


Register a dummy clock modelling the external SATA oscillator for
da850 DT mode. For non-DT boot we don't register the clock - instead
we rely on the default MPY value defined in the da850 ahci driver (as
is done currently).

Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
---
arch/arm/mach-davinci/da8xx-dt.c | 8 ++++++++
arch/arm/mach-davinci/devices-da8xx.c | 23 +++++++++++++++++++++++
arch/arm/mach-davinci/include/mach/da8xx.h | 1 +
3 files changed, 32 insertions(+)

diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c
index b83e5d1..13137cb 100644
--- a/arch/arm/mach-davinci/da8xx-dt.c
+++ b/arch/arm/mach-davinci/da8xx-dt.c
@@ -61,6 +61,14 @@ static void __init da850_init_machine(void)
pr_warn("%s: registering USB 1.1 PHY clock failed: %d",
__func__, ret);

+ if (of_machine_is_compatible("ti,da850-evm") ||
+ of_machine_is_compatible("ti,da850-lcdk")) {
+ ret = da850_register_sata_refclk(100000000);
+ if (ret)
+ pr_warn("%s: registering SATA_REFCLK clock failed: %d",
+ __func__, ret);
+ }
+
of_platform_default_populate(NULL, da850_auxdata_lookup, NULL);
davinci_pm_init();
}
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index c2457b3..2bb5b69 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -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,
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 85ff218..7e46422 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -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);
--
2.9.3