linux-kernel - [PATCH v2 14/18] serial: intel: Add CCF support

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Date:   Fri,  3 Aug 2018 11:02:33 +0800
From:   Songjun Wu <songjun.wu@...ux.intel.com>
To:     hua.ma@...ux.intel.com, yixin.zhu@...ux.intel.com,
        chuanhua.lei@...ux.intel.com, qi-ming.wu@...el.com
Cc:     linux-mips@...ux-mips.org, linux-clk@...r.kernel.org,
        linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        Songjun Wu <songjun.wu@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, Jiri Slaby <jslaby@...e.com>
Subject: [PATCH v2 14/18] serial: intel: Add CCF support

Previous implementation uses platform-dependent API to get the clock.
Those functions are not available for other SoC which uses the same IP.
The CCF (Common Clock Framework) have an abstraction based APIs for
clock. In future, the platform specific code will be removed when the
legacy soc use CCF as well.
Change to use CCF APIs to get clock and rate. So that different SoCs
can use the same driver.

Signed-off-by: Songjun Wu <songjun.wu@...ux.intel.com>
---

Changes in v2: None

 drivers/tty/serial/lantiq.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 36479d66fb7c..35518ab3a80d 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -26,7 +26,9 @@
 #include <linux/clk.h>
 #include <linux/gpio.h>
 
+#ifdef CONFIG_LANTIQ
 #include <lantiq_soc.h>
+#endif
 
 #define PORT_LTQ_ASC		111
 #define MAXPORTS		2
@@ -744,14 +746,23 @@ lqasc_probe(struct platform_device *pdev)
 	port->irq	= irqres[0].start;
 	port->mapbase	= mmres->start;
 
+#if (IS_ENABLED(CONFIG_LANTIQ) && !IS_ENABLED(CONFIG_COMMON_CLK))
 	ltq_port->freqclk = clk_get_fpi();
+#else
+	ltq_port->freqclk = devm_clk_get(&pdev->dev, "freq");
+#endif
+
 	if (IS_ERR(ltq_port->freqclk)) {
 		pr_err("failed to get fpi clk\n");
 		return -ENOENT;
 	}
 
 	/* not all asc ports have clock gates, lets ignore the return code */
+#if (IS_ENABLED(CONFIG_LANTIQ) && !IS_ENABLED(CONFIG_COMMON_CLK))
 	ltq_port->clk = clk_get(&pdev->dev, NULL);
+#else
+	ltq_port->clk = devm_clk_get(&pdev->dev, "asc");
+#endif
 
 	ltq_port->tx_irq = irqres[0].start;
 	ltq_port->rx_irq = irqres[1].start;
-- 
2.11.0