On 06/26/2013 11:02 PM, Sylwester Nawrocki wrote:
Add a PHY provider driver for the Samsung S5P/Exynos SoC MIPI CSI-2
receiver and MIPI DSI transmitter DPHYs.
Signed-off-by: Sylwester Nawrocki <s.nawro...@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
---
Changes since v2:
- adapted to the generic PHY API v9: use phy_set/get_drvdata(),
- fixed of_xlate callback to return ERR_PTR() instead of NULL,
- namespace cleanup, put "GPL v2" as MODULE_LICENSE, removed pr_debug,
- removed phy id check in __set_phy_state().
---
[...]
+
+ if (IS_EXYNOS_MIPI_DSIM_PHY_ID(id))
+ reset = EXYNOS_MIPI_PHY_MRESETN;
+ else
+ reset = EXYNOS_MIPI_PHY_SRESETN;
+
+ spin_lock_irqsave(&state->slock, flags);
Sorry for one stupid question here, why do you use spin_lock_irqsave()
rather than spin_lock(),
I don't see the irq handler will use this spinlock anywhere in this c file.
Regards,
Hui.
+ reg = readl(addr);
+ if (on)
+ reg |= reset;
+ else
+ reg &= ~reset;
+ writel(reg, addr);
+
+ /* Clear ENABLE bit only if MRESETN, SRESETN bits are not set. */
+ if (on)
+ reg |= EXYNOS_MIPI_PHY_ENABLE;
+ else if (!(reg & EXYNOS_MIPI_PHY_RESET_MASK))
+ reg &= ~EXYNOS_MIPI_PHY_ENABLE;
+
+ writel(reg, addr);
+ spin_unlock_irqrestore(&state->slock, flags);
+ return 0;
+}
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