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serial: lantiq: Add CCF support

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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@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Songjun Wu 2018-10-16 17:19:10 +08:00 committed by Greg Kroah-Hartman
parent 5034ce0605
commit dbbc26dbd0
1 changed files with 10 additions and 2 deletions
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12
drivers/tty/serial/lantiq.c
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@ -744,14 +744,22 @@ lqasc_probe(struct platform_device *pdev)
port->irq = irqres[0].start;
port->mapbase = mmres->start;
ltq_port->freqclk = clk_get_fpi();
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");
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 */
ltq_port->clk = clk_get(&pdev->dev, NULL);
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");
ltq_port->tx_irq = irqres[0].start;
ltq_port->rx_irq = irqres[1].start;