Hi, Missed to include Ben, for I2C patch, including him and copying others. Thanks, Vasanth. On Tue, Oct 30, 2012 at 9:31 PM, Vasanth Ananthan <vasanthananthan@xxxxxxxxx> wrote: > This patch adds SATA PHY utility framework APIs. The framework acts as an > interface between the SATA device and the PHY device. The SATA PHY device > registers itself with the framework through the APIs provided and the SATA > device finds and requests for an appropriate PHY device. > > Signed-off-by: Vasanth Ananthan <vasanth.a@xxxxxxxxxxx> > --- > drivers/ata/Kconfig | 10 +++++ > drivers/ata/Makefile | 1 + > drivers/ata/sata_phy.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++ > drivers/ata/sata_phy.h | 44 ++++++++++++++++++++ > 4 files changed, 159 insertions(+), 0 deletions(-) > create mode 100644 drivers/ata/sata_phy.c > create mode 100644 drivers/ata/sata_phy.h > > diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig > index e08d322..e3a2972 100644 > --- a/drivers/ata/Kconfig > +++ b/drivers/ata/Kconfig > @@ -83,6 +83,16 @@ config SATA_AHCI_PLATFORM > > If unsure, say N. > > +config SATA_PHY > + bool "SATA PHY Framework" > + default n > + help > + This option enables the SATA PHY utility framework APIs. > + The framework acts as an interface between the SATA device > + and the PHY device. The SATA PHY device registers itself > + with the framework through the APIs provided and the SATA > + device finds and requests for an appropriate PHY device. > + > config SATA_FSL > tristate "Freescale 3.0Gbps SATA support" > depends on FSL_SOC > diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile > index 9329daf..3d219a9 100644 > --- a/drivers/ata/Makefile > +++ b/drivers/ata/Makefile > @@ -10,6 +10,7 @@ obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o > obj-$(CONFIG_SATA_SIL24) += sata_sil24.o > obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o > obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o > +obj-$(CONFIG_SATA_PHY) += sata_phy.o > > # SFF w/ custom DMA > obj-$(CONFIG_PDC_ADMA) += pdc_adma.o > diff --git a/drivers/ata/sata_phy.c b/drivers/ata/sata_phy.c > new file mode 100644 > index 0000000..e5631a9 > --- /dev/null > +++ b/drivers/ata/sata_phy.c > @@ -0,0 +1,104 @@ > +/* > + * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * EXYNOS - SATA utility framework. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > +*/ > + > +#include <linux/kernel.h> > +#include <linux/export.h> > +#include <linux/err.h> > +#include <linux/device.h> > +#include <linux/slab.h> > +#include <linux/list.h> > +#include "sata_phy.h" > + > +static LIST_HEAD(phy_list); > +static DEFINE_SPINLOCK(phy_lock); > + > +struct sata_phy *sata_get_phy(enum sata_phy_type type) > +{ > + struct sata_phy *x = NULL; > + unsigned long flag; > + > + if (list_empty(&phy_list)) > + return x; > + > + spin_lock_irqsave(&phy_lock, flag); > + > + list_for_each_entry(x, &phy_list, head) { > + if (x->type == type) { > + get_device(x->dev); > + break; > + } > + } > + > + spin_unlock_irqrestore(&phy_lock, flag); > + return x; > +} > +EXPORT_SYMBOL(sata_get_phy); > + > +int sata_add_phy(struct sata_phy *phy, enum sata_phy_type type) > +{ > + unsigned long flag; > + unsigned int ret = -EINVAL; > + struct sata_phy *x; > + > + spin_lock_irqsave(&phy_lock, flag); > + > + if (!phy) > + return ret; > + > + list_for_each_entry(x, &phy_list, head) { > + if (x->type == type) { > + dev_err(phy->dev, "transceiver type already exists\n"); > + goto out; > + } > + } > + phy->type = type; > + list_add_tail(&phy->head, &phy_list); > + ret = 0; > + > + out: > + spin_unlock_irqrestore(&phy_lock, flag); > + return ret; > +} > +EXPORT_SYMBOL(sata_add_phy); > + > +void sata_remove_phy(struct sata_phy *phy) > +{ > + unsigned long flag; > + struct sata_phy *x; > + > + spin_lock_irqsave(&phy_lock, flag); > + > + if (!phy) > + return; > + > + list_for_each_entry(x, &phy_list, head) { > + if (x->type == phy->type) > + list_del(&phy->head); > + } > + > + spin_unlock_irqrestore(&phy_lock, flag); > +} > +EXPORT_SYMBOL(sata_remove_phy); > + > +void sata_put_phy(struct sata_phy *phy) > +{ > + unsigned long flag; > + > + spin_lock_irqsave(&phy_lock, flag); > + > + if (!phy) > + return; > + > + put_device(phy->dev); > + spin_unlock_irqrestore(&phy_lock, flag); > + > +} > +EXPORT_SYMBOL(sata_put_phy); > diff --git a/drivers/ata/sata_phy.h b/drivers/ata/sata_phy.h > new file mode 100644 > index 0000000..dc38683 > --- /dev/null > +++ b/drivers/ata/sata_phy.h > @@ -0,0 +1,44 @@ > +/* > + * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * EXYNOS - SATA utility framework definitions. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > +*/ > + > +enum sata_phy_type { > + SATA_PHY_GENERATION1, > + SATA_PHY_GENERATION2, > + SATA_PHY_GENERATION3, > +}; > + > +struct sata_phy { > + int (*init) (struct sata_phy *); > + int (*shutdown) (struct sata_phy *); > + struct device *dev; > + void *priv_data; > + enum sata_phy_type type; > + struct list_head head; > +}; > + > +static inline int sata_init_phy(struct sata_phy *x) > +{ > + if (x && x->init) > + return x->init(x); > + > + return -EINVAL; > +} > + > +static inline void sata_shutdown_phy(struct sata_phy *x) > +{ > + if (x && x->shutdown) > + x->shutdown(x); > +} > + > +struct sata_phy *sata_get_phy(enum sata_phy_type); > +int sata_add_phy(struct sata_phy *, enum sata_phy_type); > +void sata_remove_phy(struct sata_phy *); > +void sata_put_phy(struct sata_phy *); > -- > 1.7.4.1 > -- Regards, Vasanth K A -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
