forked from Minki/linux
1d45ac49da
Add common code for MIPI-CSIS and MIPI-DSIM drivers to support their corresponding D-PHY's enable and reset control. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/*
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* Copyright (C) 2011 Samsung Electronics Co., Ltd.
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*
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* S5P - Helper functions for MIPI-CSIS and MIPI-DSIM D-PHY control
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <mach/regs-clock.h>
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static int __s5p_mipi_phy_control(struct platform_device *pdev,
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bool on, u32 reset)
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{
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static DEFINE_SPINLOCK(lock);
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void __iomem *addr;
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unsigned long flags;
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int pid;
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u32 cfg;
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if (!pdev)
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return -EINVAL;
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pid = (pdev->id == -1) ? 0 : pdev->id;
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if (pid != 0 && pid != 1)
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return -EINVAL;
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addr = S5P_MIPI_DPHY_CONTROL(pid);
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spin_lock_irqsave(&lock, flags);
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cfg = __raw_readl(addr);
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cfg = on ? (cfg | reset) : (cfg & ~reset);
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__raw_writel(cfg, addr);
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if (on) {
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cfg |= S5P_MIPI_DPHY_ENABLE;
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} else if (!(cfg & (S5P_MIPI_DPHY_SRESETN |
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S5P_MIPI_DPHY_MRESETN) & ~reset)) {
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cfg &= ~S5P_MIPI_DPHY_ENABLE;
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}
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__raw_writel(cfg, addr);
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spin_unlock_irqrestore(&lock, flags);
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return 0;
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}
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int s5p_csis_phy_enable(struct platform_device *pdev, bool on)
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{
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return __s5p_mipi_phy_control(pdev, on, S5P_MIPI_DPHY_SRESETN);
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}
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int s5p_dsim_phy_enable(struct platform_device *pdev, bool on)
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{
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return __s5p_mipi_phy_control(pdev, on, S5P_MIPI_DPHY_MRESETN);
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}
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