dad12d1138
As we currently need to support a mix of legacy platform data and device tree intialized data, let's make sure things keep working for the TWL GPIOs. Mostly the issue is caused by the fact that DSS does not yet have device tree bindings, so we need to rely on the TWL GPIO callback for setting up things like LCD backlight for some boards. As of_platform_populate() for the TWL GPIO is called by twl-core after the I2C bus has been initialized, we cannot pass the auxdata table from the board init code to twl-core like we used to with just legacy platform data. So let's use the omap_device bus hook to patch in the platform data for TWL GPIO until we have sorted out the issues with the TWL GPIOs and device tree bindings. The other option was be to initialize twl core using legacy platform data, which seems like a step backwards as we're moving to device tree only initialization. And we really don't want to add custom configuration functions to the TWL GPIO driver either for this. Signed-off-by: Tony Lindgren <tony@atomide.com>
226 lines
5.4 KiB
C
226 lines
5.4 KiB
C
/*
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* Legacy platform_data quirks
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*
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* Copyright (C) 2013 Texas Instruments
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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/clk.h>
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/of_platform.h>
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#include <linux/wl12xx.h>
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#include <linux/platform_data/pinctrl-single.h>
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#include "common.h"
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#include "common-board-devices.h"
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#include "dss-common.h"
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#include "control.h"
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struct pdata_init {
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const char *compatible;
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void (*fn)(void);
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};
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struct of_dev_auxdata omap_auxdata_lookup[];
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static struct twl4030_gpio_platform_data twl_gpio_auxdata;
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/*
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* Create alias for USB host PHY clock.
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* Remove this when clock phandle can be provided via DT
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*/
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static void __init __used legacy_init_ehci_clk(char *clkname)
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{
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int ret;
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ret = clk_add_alias("main_clk", NULL, clkname, NULL);
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if (ret)
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pr_err("%s:Failed to add main_clk alias to %s :%d\n",
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__func__, clkname, ret);
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}
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#if IS_ENABLED(CONFIG_WL12XX)
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static struct wl12xx_platform_data wl12xx __initdata;
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static void __init __used legacy_init_wl12xx(unsigned ref_clock,
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unsigned tcxo_clock,
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int gpio)
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{
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int res;
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wl12xx.board_ref_clock = ref_clock;
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wl12xx.board_tcxo_clock = tcxo_clock;
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wl12xx.irq = gpio_to_irq(gpio);
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res = wl12xx_set_platform_data(&wl12xx);
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if (res) {
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pr_err("error setting wl12xx data: %d\n", res);
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return;
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}
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}
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#else
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static inline void legacy_init_wl12xx(unsigned ref_clock,
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unsigned tcxo_clock,
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int gpio)
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{
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}
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#endif
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#ifdef CONFIG_MACH_NOKIA_N8X0
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static void __init omap2420_n8x0_legacy_init(void)
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{
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omap_auxdata_lookup[0].platform_data = n8x0_legacy_init();
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}
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#else
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#define omap2420_n8x0_legacy_init NULL
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#endif
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#ifdef CONFIG_ARCH_OMAP3
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static void __init hsmmc2_internal_input_clk(void)
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{
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u32 reg;
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reg = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
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reg |= OMAP2_MMCSDIO2ADPCLKISEL;
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omap_ctrl_writel(reg, OMAP343X_CONTROL_DEVCONF1);
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}
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static void __init omap3_igep0020_legacy_init(void)
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{
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omap3_igep2_display_init_of();
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}
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static void __init omap3_evm_legacy_init(void)
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{
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legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 149);
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}
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static void __init omap3_zoom_legacy_init(void)
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{
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legacy_init_wl12xx(WL12XX_REFCLOCK_26, 0, 162);
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}
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#endif /* CONFIG_ARCH_OMAP3 */
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#ifdef CONFIG_ARCH_OMAP4
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static void __init omap4_sdp_legacy_init(void)
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{
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omap_4430sdp_display_init_of();
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legacy_init_wl12xx(WL12XX_REFCLOCK_26,
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WL12XX_TCXOCLOCK_26, 53);
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}
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static void __init omap4_panda_legacy_init(void)
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{
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omap4_panda_display_init_of();
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legacy_init_ehci_clk("auxclk3_ck");
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legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 53);
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}
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#endif
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#ifdef CONFIG_SOC_OMAP5
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static void __init omap5_uevm_legacy_init(void)
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{
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legacy_init_ehci_clk("auxclk1_ck");
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}
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#endif
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static struct pcs_pdata pcs_pdata;
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void omap_pcs_legacy_init(int irq, void (*rearm)(void))
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{
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pcs_pdata.irq = irq;
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pcs_pdata.rearm = rearm;
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}
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/*
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* GPIOs for TWL are initialized by the I2C bus and need custom
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* handing until DSS has device tree bindings.
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*/
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void omap_auxdata_legacy_init(struct device *dev)
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{
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if (dev->platform_data)
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return;
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if (strcmp("twl4030-gpio", dev_name(dev)))
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return;
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dev->platform_data = &twl_gpio_auxdata;
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}
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/*
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* Few boards still need auxdata populated before we populate
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* the dev entries in of_platform_populate().
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*/
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static struct pdata_init auxdata_quirks[] __initdata = {
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#ifdef CONFIG_SOC_OMAP2420
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{ "nokia,n800", omap2420_n8x0_legacy_init, },
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{ "nokia,n810", omap2420_n8x0_legacy_init, },
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{ "nokia,n810-wimax", omap2420_n8x0_legacy_init, },
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#endif
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{ /* sentinel */ },
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};
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struct of_dev_auxdata omap_auxdata_lookup[] __initdata = {
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#ifdef CONFIG_MACH_NOKIA_N8X0
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OF_DEV_AUXDATA("ti,omap2420-mmc", 0x4809c000, "mmci-omap.0", NULL),
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#endif
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#ifdef CONFIG_ARCH_OMAP3
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OF_DEV_AUXDATA("ti,omap3-padconf", 0x48002030, "48002030.pinmux", &pcs_pdata),
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OF_DEV_AUXDATA("ti,omap3-padconf", 0x48002a00, "48002a00.pinmux", &pcs_pdata),
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#endif
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#ifdef CONFIG_ARCH_OMAP4
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OF_DEV_AUXDATA("ti,omap4-padconf", 0x4a100040, "4a100040.pinmux", &pcs_pdata),
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OF_DEV_AUXDATA("ti,omap4-padconf", 0x4a31e040, "4a31e040.pinmux", &pcs_pdata),
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#endif
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{ /* sentinel */ },
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};
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/*
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* Few boards still need to initialize some legacy devices with
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* platform data until the drivers support device tree.
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*/
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static struct pdata_init pdata_quirks[] __initdata = {
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#ifdef CONFIG_ARCH_OMAP3
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{ "nokia,omap3-n900", hsmmc2_internal_input_clk, },
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{ "nokia,omap3-n9", hsmmc2_internal_input_clk, },
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{ "nokia,omap3-n950", hsmmc2_internal_input_clk, },
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{ "isee,omap3-igep0020", omap3_igep0020_legacy_init, },
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{ "ti,omap3-evm-37xx", omap3_evm_legacy_init, },
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{ "ti,omap3-zoom3", omap3_zoom_legacy_init, },
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#endif
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#ifdef CONFIG_ARCH_OMAP4
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{ "ti,omap4-sdp", omap4_sdp_legacy_init, },
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{ "ti,omap4-panda", omap4_panda_legacy_init, },
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#endif
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#ifdef CONFIG_SOC_OMAP5
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{ "ti,omap5-uevm", omap5_uevm_legacy_init, },
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#endif
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{ /* sentinel */ },
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};
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static void pdata_quirks_check(struct pdata_init *quirks)
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{
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while (quirks->compatible) {
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if (of_machine_is_compatible(quirks->compatible)) {
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if (quirks->fn)
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quirks->fn();
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break;
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}
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quirks++;
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}
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}
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void __init pdata_quirks_init(struct of_device_id *omap_dt_match_table)
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{
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omap_sdrc_init(NULL, NULL);
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pdata_quirks_check(auxdata_quirks);
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of_platform_populate(NULL, omap_dt_match_table,
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omap_auxdata_lookup, NULL);
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pdata_quirks_check(pdata_quirks);
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}
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