Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753860Ab2FKA7X (ORCPT ); Sun, 10 Jun 2012 20:59:23 -0400 Received: from mail2.gnudd.com ([213.203.150.91]:40549 "EHLO mail.gnudd.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753440Ab2FKA6c (ORCPT ); Sun, 10 Jun 2012 20:58:32 -0400 From: Davide Ciminaghi To: linux-kernel@vger.kernel.org Cc: sameo@linux.intel.com, rubini@gnudd.com, Davide Ciminaghi Subject: [PATCH 13/14] sta2x11-mfd : add sta2x11_mfd_get_regs_data() function Date: Mon, 11 Jun 2012 02:57:58 +0200 Message-Id: <1339376279-16753-14-git-send-email-dciminaghi@mail.gnudd.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1339376279-16753-1-git-send-email-dciminaghi@mail.gnudd.com> References: <1339376279-16753-1-git-send-email-dciminaghi@mail.gnudd.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2591 Lines: 73 From: Davide Ciminaghi The common clock framework implementation needs to access some of the sctl and apb-soc registers to configure, enable and disable clocks. In particular, a couple of predefined clocks (mux and gated) need to be initialized with the virtual address of the clock's controlling register and the address of a spinlock used to protect against races. This function exports such data for all the mfd cells. Signed-off-by: Davide Ciminaghi --- drivers/mfd/sta2x11-mfd.c | 22 ++++++++++++++++++++++ include/linux/mfd/sta2x11-mfd.h | 5 +++++ 2 files changed, 27 insertions(+), 0 deletions(-) diff --git a/drivers/mfd/sta2x11-mfd.c b/drivers/mfd/sta2x11-mfd.c index aca0bc7..9404988 100644 --- a/drivers/mfd/sta2x11-mfd.c +++ b/drivers/mfd/sta2x11-mfd.c @@ -129,6 +129,28 @@ u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val, } EXPORT_SYMBOL(__sta2x11_mfd_mask); +extern int sta2x11_mfd_get_regs_data(struct platform_device *dev, + enum sta2x11_mfd_plat_dev index, + void __iomem **regs, + spinlock_t **lock) +{ + struct pci_dev *pdev = *(struct pci_dev **)(dev->dev.platform_data); + struct sta2x11_mfd *mfd; + + if (!pdev) + return -ENODEV; + mfd = sta2x11_mfd_find(pdev); + if (!mfd) + return -ENODEV; + if (index >= sta2x11_n_mfd_plat_devs) + return -ENODEV; + *regs = mfd->regs[index]; + *lock = &mfd->lock[index]; + pr_debug("%s %d *regs = %p\n", __func__, __LINE__, *regs); + return *regs ? 0 : -ENODEV; +} +EXPORT_SYMBOL(sta2x11_mfd_get_regs_data); + /* Two debugfs files, for our registers (FIXME: one instance only) */ #define REG(regname) {.name = #regname, .offset = SCTL_ ## regname} static struct debugfs_reg32 sta2x11_sctl_regs[] = { diff --git a/include/linux/mfd/sta2x11-mfd.h b/include/linux/mfd/sta2x11-mfd.h index 85b2c20..9de20fd 100644 --- a/include/linux/mfd/sta2x11-mfd.h +++ b/include/linux/mfd/sta2x11-mfd.h @@ -481,4 +481,9 @@ u32 sta2x11_apb_soc_regs_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val) #define COMPENSATION_REG3 0x3cc #define TEST_CTL_REG 0x3d0 +extern int sta2x11_mfd_get_regs_data(struct platform_device *pdev, + enum sta2x11_mfd_plat_dev index, + void __iomem **regs, + spinlock_t **lock); + #endif /* __STA2X11_MFD_H */ -- 1.7.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/