diff options
| author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2017-01-30 11:02:03 +0100 |
|---|---|---|
| committer | Sekhar Nori <nsekhar@ti.com> | 2017-01-31 20:48:24 +0530 |
| commit | 00bacfbfaf508940fd5fba22372a0935c4a01358 (patch) | |
| tree | 7eff288b50a24f01e7ccd22f828c51d843490480 /arch | |
| parent | 8ba0f6caa41c0786b964dcf75ab74bb05c726ec3 (diff) | |
| download | linux-stable-00bacfbfaf508940fd5fba22372a0935c4a01358.tar.gz linux-stable-00bacfbfaf508940fd5fba22372a0935c4a01358.tar.bz2 linux-stable-00bacfbfaf508940fd5fba22372a0935c4a01358.zip | |
ARM: davinci: da850: model the SATA refclk
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-davinci/da8xx-dt.c | 8 | ||||
| -rw-r--r-- | arch/arm/mach-davinci/devices-da8xx.c | 29 | ||||
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/da8xx.h | 1 |
3 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c index 62c3d5174d4a..071933b16a0c 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(); pdata_quirks_init(); diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c index c2457b3fdb5f..cfceb326a39b 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 85ff2183b6db..7e464228948b 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); |