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From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
To: Kevin Hilman <khilman@kernel.org>, Sekhar Nori <nsekhar@ti.com>,
	Patrick Titiano <ptitiano@baylibre.com>,
	Michael Turquette <mturquette@baylibre.com>,
	Tejun Heo <tj@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Russell King <linux@armlinux.org.uk>,
	David Lechner <david@lechnology.com>
Cc: linux-ide@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v5 06/14] ARM: davinci: da850: model the SATA refclk
Date: Fri, 20 Jan 2017 12:21:57 +0100	[thread overview]
Message-ID: <1484911325-23425-7-git-send-email-bgolaszewski@baylibre.com> (raw)
In-Reply-To: <1484911325-23425-1-git-send-email-bgolaszewski@baylibre.com>

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>
---
 arch/arm/mach-davinci/da8xx-dt.c           |  8 ++++++++
 arch/arm/mach-davinci/devices-da8xx.c      | 29 +++++++++++++++++++++++++++++
 arch/arm/mach-davinci/include/mach/da8xx.h |  1 +
 3 files changed, 38 insertions(+)

diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c
index b83e5d1..55342ca 100644
--- a/arch/arm/mach-davinci/da8xx-dt.c
+++ b/arch/arm/mach-davinci/da8xx-dt.c
@@ -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();
 }
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index c2457b3..cfceb32 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,
@@ -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
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

  parent reply	other threads:[~2017-01-20 11:22 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-20 11:21 [PATCH v5 00/14] ARM: da850-lcdk: add SATA support Bartosz Golaszewski
2017-01-20 11:21 ` [PATCH v5 01/14] devicetree: bindings: add bindings for ahci-da850 Bartosz Golaszewski
2017-01-20 13:32   ` Sekhar Nori
2017-01-23 15:49     ` Rob Herring
2017-01-20 11:21 ` [PATCH v5 02/14] ARM: davinci_all_defconfig: enable SATA modules Bartosz Golaszewski
2017-01-20 11:21 ` [PATCH v5 03/14] ARM: davinci: add a clock lookup entry for the SATA clock Bartosz Golaszewski
2017-01-20 11:21 ` [PATCH v5 04/14] sata: ahci-da850: get the sata clock using a connection id Bartosz Golaszewski
2017-01-20 11:21 ` [PATCH v5 05/14] ARM: davinci: da850: add con_id for the SATA clock Bartosz Golaszewski
2017-01-20 11:21 ` Bartosz Golaszewski [this message]
2017-01-20 11:21 ` [PATCH v5 07/14] sata: ahci-da850: add device tree match table Bartosz Golaszewski
2017-01-20 11:21 ` [PATCH v5 08/14] sata: ahci-da850: implement a workaround for the softreset quirk Bartosz Golaszewski
2017-01-20 11:22 ` [PATCH v5 09/14] sata: ahci: export ahci_do_hardreset() locally Bartosz Golaszewski
2017-01-20 11:22 ` [PATCH v5 10/14] sata: ahci-da850: add a workaround for controller instability Bartosz Golaszewski
2017-01-20 11:22 ` [PATCH v5 11/14] sata: ahci-da850: un-hardcode the MPY bits Bartosz Golaszewski
2017-01-20 11:22 ` [PATCH v5 12/14] ARM: davinci: remove BUG_ON() from da850_register_sata() Bartosz Golaszewski
2017-01-20 11:22 ` [PATCH v5 13/14] ARM: dts: da850: add the SATA node Bartosz Golaszewski
2017-01-20 11:22 ` [PATCH v5 14/14] ARM: dts: da850-lcdk: enable " Bartosz Golaszewski
2017-01-20 13:28 ` [PATCH v5 00/14] ARM: da850-lcdk: add SATA support Tejun Heo
2017-01-20 13:56   ` Sekhar Nori
2017-01-20 14:02     ` Bartosz Golaszewski
2017-01-20 14:22       ` Sekhar Nori
2017-01-20 15:00         ` Tejun Heo

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