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Miller" , Florian Fainelli , Andrew Lunn , Rob Herring , Mark Rutland , Ray Jui , Scott Branden , Catalin Marinas , Will Deacon Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Arun Parameswaran Subject: [PATCH 6/7] net: phy: Add pm support to Broadcom iProc mdio mux driver Date: Thu, 26 Jul 2018 11:36:23 -0700 Message-Id: <1532630184-29450-7-git-send-email-arun.parameswaran@broadcom.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1532630184-29450-1-git-send-email-arun.parameswaran@broadcom.com> References: <1532630184-29450-1-git-send-email-arun.parameswaran@broadcom.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support for suspend and resume to the Broadcom iProc mdio mux driver. Signed-off-by: Arun Parameswaran --- drivers/net/phy/mdio-mux-bcm-iproc.c | 42 ++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/net/phy/mdio-mux-bcm-iproc.c b/drivers/net/phy/mdio-mux-bcm-iproc.c index 6b400dd..89c18d6 100644 --- a/drivers/net/phy/mdio-mux-bcm-iproc.c +++ b/drivers/net/phy/mdio-mux-bcm-iproc.c @@ -51,13 +51,25 @@ #define MDIO_OPERATING_FREQUENCY 11000000 #define MDIO_RATE_ADJ_DIVIDENT 1 +#define MDIO_NUM_OF_REGS_TO_RESTORE 2 + struct iproc_mdiomux_desc { void *mux_handle; void __iomem *base; struct device *dev; struct mii_bus *mii_bus; struct clk *core_clk; +#ifdef CONFIG_PM_SLEEP + u32 restore_regs[MDIO_NUM_OF_REGS_TO_RESTORE]; +#endif +}; + +#ifdef CONFIG_PM_SLEEP +static const u16 restore_reg_offsets[MDIO_NUM_OF_REGS_TO_RESTORE] = { + MDIO_RATE_ADJ_EXT_OFFSET, + MDIO_RATE_ADJ_INT_OFFSET, }; +#endif static void mdio_mux_iproc_config_clk(struct iproc_mdiomux_desc *md) { @@ -258,6 +270,35 @@ static int mdio_mux_iproc_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int mdio_mux_iproc_suspend(struct device *dev) +{ + int i; + struct iproc_mdiomux_desc *md = dev_get_drvdata(dev); + + for (i = 0; i < MDIO_NUM_OF_REGS_TO_RESTORE; i++) + md->restore_regs[i] = readl(md->base + + restore_reg_offsets[i]); + + return 0; +} + +static int mdio_mux_iproc_resume(struct device *dev) +{ + int i; + struct iproc_mdiomux_desc *md = dev_get_drvdata(dev); + + for (i = 0; i < MDIO_NUM_OF_REGS_TO_RESTORE; i++) + writel(md->restore_regs[i], + md->base + restore_reg_offsets[i]); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(mdio_mux_iproc_pm_ops, + mdio_mux_iproc_suspend, mdio_mux_iproc_resume); + static const struct of_device_id mdio_mux_iproc_match[] = { { .compatible = "brcm,mdio-mux-iproc", @@ -270,6 +311,7 @@ static int mdio_mux_iproc_remove(struct platform_device *pdev) .driver = { .name = "mdio-mux-iproc", .of_match_table = mdio_mux_iproc_match, + .pm = &mdio_mux_iproc_pm_ops, }, .probe = mdio_mux_iproc_probe, .remove = mdio_mux_iproc_remove, -- 1.9.1