[DO NOT MERGE v5 23/37] mfd: sm501: Convert platform_data to OF property

Yoshinori Sato
2023-12-05T09:55:37Z

Various parameters of SM501 can be set using platform_data,
so parameters cannot be passed in the DeviceTree target.
Expands the parameters set in platform_data so that they can be
specified using DeviceTree properties.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
drivers/mfd/sm501.c | 99 +++++++++++++++++++++++++++++++++++
drivers/video/fbdev/sm501fb.c | 82 +++++++++++++++++++++++++++++
2 files changed, 181 insertions(+)

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 28027982cf69..f0104fdf0f34 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1370,6 +1370,99 @@ static int sm501_init_dev(struct sm501_devdata *sm)
return 0;
}

+static void sm501_of_read_reg_init(struct device_node *np,
+ const char *propname, struct sm501_reg_init *val)
+{
+ u32 u32_val[2];
+
+ if (!of_property_read_u32_array(np, propname, u32_val, sizeof(u32_val))) {
+ val->set = u32_val[0];
+ val->mask = u32_val[1];
+ }
+}
+
+/* Read GPIO I2C configuration */
+static int sm501_parse_dt_gpio_i2c(struct device *dev, struct sm501_platdata *plat,
+ struct device_node *np)
+{
+ struct sm501_platdata_gpio_i2c *gpio_i2c_p;
+ struct property *prop;
+ u32 gpio_i2c[5];
+ const __be32 *p;
+ unsigned int i;
+ u32 i2c_nr;
+
+ prop = of_find_property(np, "smi,gpio-i2c", NULL);
+ if (!prop)
+ return 0;
+
+ i2c_nr = of_property_count_u32_elems(np, "smi,gpio-i2c");
+
+ /* GPIO I2C define 5 words per channel. */
+ if (i2c_nr % 5)
+ return -EINVAL;
+ i2c_nr /= 5;
+ plat->gpio_i2c = devm_kzalloc(dev, sizeof(*plat->gpio_i2c) * i2c_nr,
+ GFP_KERNEL);
+ if (!plat->gpio_i2c)
+ return -ENOMEM;
+
+ plat->gpio_i2c_nr = i2c_nr;
+ gpio_i2c_p = plat->gpio_i2c;
+
+ for (; i2c_nr > 0; i2c_nr--) {
+ for (i = 0; i < ARRAY_SIZE(gpio_i2c); i++) {
+ p = of_prop_next_u32(prop, p, &gpio_i2c[i]);
+ if (!p)
+ return -EINVAL;
+ }
+ gpio_i2c_p->bus_num = gpio_i2c[0];
+ gpio_i2c_p->pin_sda = gpio_i2c[1];
+ gpio_i2c_p->pin_scl = gpio_i2c[2];
+ gpio_i2c_p->udelay = gpio_i2c[3];
+ gpio_i2c_p->timeout = gpio_i2c[4];
+ gpio_i2c_p++;
+ }
+ return 0;
+}
+
+/* Build platform_data from OF property */
+static int sm501_parse_dt(struct sm501_devdata *sm, struct device_node *np)
+{
+ struct sm501_platdata *plat;
+ u32 u32_val;
+ int ret;
+
+ plat = devm_kzalloc(sm->dev, sizeof(*plat), GFP_KERNEL);
+ if (!plat)
+ return -ENOMEM;
+
+ plat->init = devm_kzalloc(sm->dev, sizeof(*plat->init), GFP_KERNEL);
+ if (!plat->init)
+ return -ENOMEM;
+
+ if (!of_property_read_u32(np, "smi,devices", &u32_val))
+ plat->init->devices = u32_val;
+ if (!of_property_read_u32(np, "smi,mclk", &u32_val))
+ plat->init->mclk = u32_val;
+ if (!of_property_read_u32(np, "smi,m1xclk", &u32_val))
+ plat->init->m1xclk = u32_val;
+
+ sm501_of_read_reg_init(np, "smi,misc-timing", &plat->init->misc_timing);
+ sm501_of_read_reg_init(np, "smi,misc-control", &plat->init->misc_control);
+ sm501_of_read_reg_init(np, "smi,gpio-low", &plat->init->gpio_low);
+ sm501_of_read_reg_init(np, "smi,gpio-high", &plat->init->gpio_high);
+
+ if (IS_ENABLED(CONFIG_MFD_SM501_GPIO) &&
+ (plat->init->devices & SM501_USE_GPIO)) {
+ ret = sm501_parse_dt_gpio_i2c(sm->dev, plat, np);
+ if (ret)
+ return ret;
+ }
+ sm->platdata = plat;
+ return 0;
+}
+
static int sm501_plat_probe(struct platform_device *dev)
{
struct sm501_devdata *sm;
@@ -1406,6 +1499,12 @@ static int sm501_plat_probe(struct platform_device *dev)
goto err_res;
}

+ if (IS_ENABLED(CONFIG_OF) && dev->dev.of_node) {
+ ret = sm501_parse_dt(sm, dev->dev.of_node);
+ if (ret)
+ goto err_res;
+ }
+
platform_set_drvdata(dev, sm);

sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res));
diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c
index d6fdc1737cd2..d35285819d28 100644
--- a/drivers/video/fbdev/sm501fb.c
+++ b/drivers/video/fbdev/sm501fb.c
@@ -1932,6 +1932,82 @@ static int sm501fb_start_one(struct sm501fb_info *info,
return 0;
}

+#if defined(CONFIG_OF)
+/* parse CRT / panel configuration */
+static struct sm501_platdata_fbsub *dt_fbsub(struct device *dev,
+ struct device_node *np,
+ const char *name)
+{
+ struct sm501_platdata_fbsub *fbsub = NULL;
+ struct fb_videomode *def_mode = NULL;
+ struct device_node *child;
+ const void *p_edid;
+ u32 flags = 0;
+ u32 bpp = 0;
+ int len;
+
+ child = of_get_child_by_name(np, name);
+ if (child == NULL)
+ return NULL;
+
+ p_edid = of_get_property(child, "edid", &len);
+ if (p_edid && len == EDID_LENGTH) {
+ struct fb_monspecs *specs;
+ u8 *edid;
+
+ edid = kmemdup(p_edid, EDID_LENGTH, GFP_KERNEL);
+ if (edid) {
+ specs = kzalloc(sizeof(*specs), GFP_KERNEL);
+ if (specs) {
+ fb_edid_to_monspecs(edid, specs);
+ def_mode = specs->modedb;
+ }
+ }
+ kfree(edid);
+ }
+
+ of_property_read_u32(child, "bpp", &bpp);
+
+ /* If flags property is obtained, fbsub is returned. */
+ if (!of_property_read_u32(child, "smi,flags", &flags)) {
+ fbsub = devm_kzalloc(dev, sizeof(*fbsub), GFP_KERNEL);
+ if (fbsub) {
+ fbsub->def_mode = def_mode;
+ fbsub->def_bpp = bpp;
+ fbsub->flags = flags;
+ }
+ }
+ return fbsub;
+}
+
+/* Build platform_data from OF property */
+static struct sm501_platdata_fb *pdata_from_dt(struct device *dev, struct device_node *np)
+{
+ enum sm501_fb_routing fb_route = SM501_FB_OWN;
+ struct sm501_platdata_fb *pdata = NULL;
+ struct sm501_platdata_fbsub *fb_crt;
+ struct sm501_platdata_fbsub *fb_pnl;
+ unsigned int flags = 0;
+
+ if (of_property_read_bool(np, "route-crt-panel"))
+ fb_route = SM501_FB_CRT_PANEL;
+ if (of_property_read_bool(np, "swap-fb-endian"))
+ flags = SM501_FBPD_SWAP_FB_ENDIAN;
+ fb_crt = dt_fbsub(dev, np, "crt");
+ fb_pnl = dt_fbsub(dev, np, "panel");
+ if (fb_crt || fb_pnl) {
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (pdata) {
+ pdata->fb_route = fb_route;
+ pdata->flags = flags;
+ pdata->fb_crt = fb_crt;
+ pdata->fb_pnl = fb_pnl;
+ }
+ }
+ return pdata;
+}
+#endif
+
static int sm501fb_probe(struct platform_device *pdev)
{
struct sm501fb_info *info;
@@ -1974,6 +2050,12 @@ static int sm501fb_probe(struct platform_device *pdev)
if (info->edid_data)
found = 1;
}
+ /* Get platform data compatible configuration */
+ if (!found) {
+ info->pdata = pdata_from_dt(dev, np);
+ if (info->pdata)
+ found = 1;
+ }
}
#endif
if (!found) {
--
2.39.2