[PATCHv5 31/35] ARM: OMAP4: display: convert display to use syscon for dsi muxing

[Tero Kristo]

The legacy control module APIs will be gone, thus convert the display
driver to use syscon. This change should eventually be moved to
display driver from the board directory.

Signed-off-by: Tero Kristo <t-kri...@ti.com>
Cc: Tomi Valkeinen <tomi.valkei...@ti.com>
---
 arch/arm/mach-omap2/display.c |   15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 7a050f9..f492ae1 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -26,6 +26,8 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/slab.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 
 #include <video/omapdss.h>
 #include "omap_hwmod.h"
@@ -104,6 +106,10 @@ static const struct omap_dss_hwmod_data 
omap4_dss_hwmod_data[] __initconst = {
        { "dss_hdmi", "omapdss_hdmi", -1 },
 };
 
+#define OMAP4_DSIPHY_SYSCON_OFFSET             0x78
+
+static struct regmap *omap4_dsi_mux_syscon;
+
 static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
 {
        u32 enable_mask, enable_shift;
@@ -124,7 +130,7 @@ static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
                return -ENODEV;
        }
 
-       reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
+       regmap_read(omap4_dsi_mux_syscon, OMAP4_DSIPHY_SYSCON_OFFSET, &reg);
 
        reg &= ~enable_mask;
        reg &= ~pipd_mask;
@@ -132,7 +138,7 @@ static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
        reg |= (lanes << enable_shift) & enable_mask;
        reg |= (lanes << pipd_shift) & pipd_mask;
 
-       omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
+       regmap_write(omap4_dsi_mux_syscon, OMAP4_DSIPHY_SYSCON_OFFSET, reg);
 
        return 0;
 }
@@ -665,5 +671,10 @@ int __init omapdss_init_of(void)
                return r;
        }
 
+       /* add DSI info for omap4 */
+       node = of_find_node_by_name(NULL, "omap4_padconf_global");
+       if (node)
+               omap4_dsi_mux_syscon = syscon_node_to_regmap(node);
+
        return 0;
 }
-- 
1.7.9.5

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