diff options
| author | Sylwester Nawrocki <s.nawrocki@samsung.com> | 2011-03-10 15:53:40 +0300 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-03-11 09:49:01 +0300 |
| commit | 1d45ac49daa15fd0a64c58744ac9ea6451e607e6 (patch) | |
| tree | 8db8bb0dd987dfd3c4a166893040de29ba9482e9 /arch/arm/plat-s5p | |
| parent | e24d208de6bc779c6bd97523cde2665a33f2be4d (diff) | |
| download | linux-1d45ac49daa15fd0a64c58744ac9ea6451e607e6.tar.xz | |
ARM: S5P: Add support for common MIPI CSIS/DSIM D-PHY control
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>
Diffstat (limited to 'arch/arm/plat-s5p')
| -rw-r--r-- | arch/arm/plat-s5p/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arm/plat-s5p/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/plat-s5p/setup-mipiphy.c | 63 |
3 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig index 6390ac728b35..463d3aac83e4 100644 --- a/arch/arm/plat-s5p/Kconfig +++ b/arch/arm/plat-s5p/Kconfig @@ -74,3 +74,8 @@ config S5P_DEV_CSIS1 bool help Compile in platform device definitions for MIPI-CSIS channel 1 + +config S5P_SETUP_MIPIPHY + bool + help + Compile in common setup code for MIPI-CSIS and MIPI-DSIM devices diff --git a/arch/arm/plat-s5p/Makefile b/arch/arm/plat-s5p/Makefile index 4bd5cf908977..79ee7bb08cef 100644 --- a/arch/arm/plat-s5p/Makefile +++ b/arch/arm/plat-s5p/Makefile @@ -31,3 +31,4 @@ obj-$(CONFIG_S5P_DEV_FIMC2) += dev-fimc2.o obj-$(CONFIG_S5P_DEV_ONENAND) += dev-onenand.o obj-$(CONFIG_S5P_DEV_CSIS0) += dev-csis0.o obj-$(CONFIG_S5P_DEV_CSIS1) += dev-csis1.o +obj-$(CONFIG_S5P_SETUP_MIPIPHY) += setup-mipiphy.o diff --git a/arch/arm/plat-s5p/setup-mipiphy.c b/arch/arm/plat-s5p/setup-mipiphy.c new file mode 100644 index 000000000000..683c466c0e6a --- /dev/null +++ b/arch/arm/plat-s5p/setup-mipiphy.c @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2011 Samsung Electronics Co., Ltd. + * + * S5P - Helper functions for MIPI-CSIS and MIPI-DSIM D-PHY control + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/spinlock.h> +#include <mach/regs-clock.h> + +static int __s5p_mipi_phy_control(struct platform_device *pdev, + bool on, u32 reset) +{ + static DEFINE_SPINLOCK(lock); + void __iomem *addr; + unsigned long flags; + int pid; + u32 cfg; + + if (!pdev) + return -EINVAL; + + pid = (pdev->id == -1) ? 0 : pdev->id; + + if (pid != 0 && pid != 1) + return -EINVAL; + + addr = S5P_MIPI_DPHY_CONTROL(pid); + + spin_lock_irqsave(&lock, flags); + + cfg = __raw_readl(addr); + cfg = on ? (cfg | reset) : (cfg & ~reset); + __raw_writel(cfg, addr); + + if (on) { + cfg |= S5P_MIPI_DPHY_ENABLE; + } else if (!(cfg & (S5P_MIPI_DPHY_SRESETN | + S5P_MIPI_DPHY_MRESETN) & ~reset)) { + cfg &= ~S5P_MIPI_DPHY_ENABLE; + } + + __raw_writel(cfg, addr); + spin_unlock_irqrestore(&lock, flags); + + return 0; +} + +int s5p_csis_phy_enable(struct platform_device *pdev, bool on) +{ + return __s5p_mipi_phy_control(pdev, on, S5P_MIPI_DPHY_SRESETN); +} + +int s5p_dsim_phy_enable(struct platform_device *pdev, bool on) +{ + return __s5p_mipi_phy_control(pdev, on, S5P_MIPI_DPHY_MRESETN); +} |