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author | Nishad Kamdar <nishadkamdar@gmail.com> | 2019-01-14 20:28:59 +0530 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-15 16:18:14 +0100 |
commit | 4207b5870da5b79a7831cbead2cb60daeab7d64f (patch) | |
tree | e511d56659fe08ccaa428c208bc37024264dfa26 /drivers/staging/greybus | |
parent | fbacec8f2a0e05dd72de475224f3ab1c705c70fb (diff) | |
download | linux-4207b5870da5b79a7831cbead2cb60daeab7d64f.tar.gz linux-4207b5870da5b79a7831cbead2cb60daeab7d64f.tar.bz2 linux-4207b5870da5b79a7831cbead2cb60daeab7d64f.zip |
staging: greybus: arche-platform: Switch to the gpio descriptor interface
Use the gpiod interface instead of the deprecated old non-descriptor
interface while continuing to ignore gpio flags from device tree in
"svc_reset_onoff()" for now.
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/greybus')
-rw-r--r-- | drivers/staging/greybus/arche-platform.c | 124 |
1 files changed, 41 insertions, 83 deletions
diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c index 4c36e88766e7..6eb842040c22 100644 --- a/drivers/staging/greybus/arche-platform.c +++ b/drivers/staging/greybus/arche-platform.c @@ -8,10 +8,9 @@ #include <linux/clk.h> #include <linux/delay.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/module.h> -#include <linux/of_gpio.h> #include <linux/of_platform.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> @@ -45,14 +44,14 @@ enum svc_wakedetect_state { struct arche_platform_drvdata { /* Control GPIO signals to and from AP <=> SVC */ - int svc_reset_gpio; + struct gpio_desc *svc_reset; bool is_reset_act_hi; - int svc_sysboot_gpio; - int wake_detect_gpio; /* bi-dir,maps to WAKE_MOD & WAKE_FRAME signals */ + struct gpio_desc *svc_sysboot; + struct gpio_desc *wake_detect; /* bi-dir,maps to WAKE_MOD & WAKE_FRAME signals */ enum arche_platform_state state; - int svc_refclk_req; + struct gpio_desc *svc_refclk_req; struct clk *svc_ref_clk; struct pinctrl *pinctrl; @@ -85,9 +84,9 @@ static void arche_platform_set_wake_detect_state( arche_pdata->wake_detect_state = state; } -static inline void svc_reset_onoff(unsigned int gpio, bool onoff) +static inline void svc_reset_onoff(struct gpio_desc *gpio, bool onoff) { - gpio_set_value(gpio, onoff); + gpiod_set_raw_value(gpio, onoff); } static int apb_cold_boot(struct device *dev, void *data) @@ -116,7 +115,6 @@ static int apb_poweroff(struct device *dev, void *data) static void arche_platform_wd_irq_en(struct arche_platform_drvdata *arche_pdata) { /* Enable interrupt here, to read event back from SVC */ - gpio_direction_input(arche_pdata->wake_detect_gpio); enable_irq(arche_pdata->wake_detect_irq); } @@ -160,7 +158,7 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) spin_lock_irqsave(&arche_pdata->wake_lock, flags); - if (gpio_get_value(arche_pdata->wake_detect_gpio)) { + if (gpiod_get_value(arche_pdata->wake_detect)) { /* wake/detect rising */ /* @@ -224,10 +222,9 @@ arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata) dev_info(arche_pdata->dev, "Booting from cold boot state\n"); - svc_reset_onoff(arche_pdata->svc_reset_gpio, - arche_pdata->is_reset_act_hi); + svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi); - gpio_set_value(arche_pdata->svc_sysboot_gpio, 0); + gpiod_set_value(arche_pdata->svc_sysboot, 0); usleep_range(100, 200); ret = clk_prepare_enable(arche_pdata->svc_ref_clk); @@ -238,8 +235,7 @@ arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata) } /* bring SVC out of reset */ - svc_reset_onoff(arche_pdata->svc_reset_gpio, - !arche_pdata->is_reset_act_hi); + svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi); arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_ACTIVE); @@ -259,10 +255,9 @@ arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata) dev_info(arche_pdata->dev, "Switching to FW flashing state\n"); - svc_reset_onoff(arche_pdata->svc_reset_gpio, - arche_pdata->is_reset_act_hi); + svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi); - gpio_set_value(arche_pdata->svc_sysboot_gpio, 1); + gpiod_set_value(arche_pdata->svc_sysboot, 1); usleep_range(100, 200); @@ -273,8 +268,7 @@ arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata) return ret; } - svc_reset_onoff(arche_pdata->svc_reset_gpio, - !arche_pdata->is_reset_act_hi); + svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi); arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_FW_FLASHING); @@ -305,8 +299,7 @@ arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pdata) clk_disable_unprepare(arche_pdata->svc_ref_clk); /* As part of exit, put APB back in reset state */ - svc_reset_onoff(arche_pdata->svc_reset_gpio, - arche_pdata->is_reset_act_hi); + svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi); arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF); } @@ -435,6 +428,7 @@ static int arche_platform_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; int ret; + unsigned int flags; arche_pdata = devm_kzalloc(&pdev->dev, sizeof(*arche_pdata), GFP_KERNEL); @@ -444,61 +438,33 @@ static int arche_platform_probe(struct platform_device *pdev) /* setup svc reset gpio */ arche_pdata->is_reset_act_hi = of_property_read_bool(np, "svc,reset-active-high"); - arche_pdata->svc_reset_gpio = of_get_named_gpio(np, - "svc,reset-gpio", - 0); - if (!gpio_is_valid(arche_pdata->svc_reset_gpio)) { - dev_err(dev, "failed to get reset-gpio\n"); - return arche_pdata->svc_reset_gpio; - } - ret = devm_gpio_request(dev, arche_pdata->svc_reset_gpio, "svc-reset"); - if (ret) { - dev_err(dev, "failed to request svc-reset gpio:%d\n", ret); - return ret; - } - ret = gpio_direction_output(arche_pdata->svc_reset_gpio, - arche_pdata->is_reset_act_hi); - if (ret) { - dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret); + if (arche_pdata->is_reset_act_hi) + flags = GPIOD_OUT_HIGH; + else + flags = GPIOD_OUT_LOW; + + arche_pdata->svc_reset = devm_gpiod_get(dev, "svc,reset", flags); + if (IS_ERR(arche_pdata->svc_reset)) { + ret = PTR_ERR(arche_pdata->svc_reset); + dev_err(dev, "failed to request svc-reset GPIO: %d\n", ret); return ret; } arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF); - arche_pdata->svc_sysboot_gpio = of_get_named_gpio(np, - "svc,sysboot-gpio", - 0); - if (!gpio_is_valid(arche_pdata->svc_sysboot_gpio)) { - dev_err(dev, "failed to get sysboot gpio\n"); - return arche_pdata->svc_sysboot_gpio; - } - ret = devm_gpio_request(dev, arche_pdata->svc_sysboot_gpio, "sysboot0"); - if (ret) { - dev_err(dev, "failed to request sysboot0 gpio:%d\n", ret); - return ret; - } - ret = gpio_direction_output(arche_pdata->svc_sysboot_gpio, 0); - if (ret) { - dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret); + arche_pdata->svc_sysboot = devm_gpiod_get(dev, "svc,sysboot", + GPIOD_OUT_LOW); + if (IS_ERR(arche_pdata->svc_sysboot)) { + ret = PTR_ERR(arche_pdata->svc_sysboot); + dev_err(dev, "failed to request sysboot0 GPIO: %d\n", ret); return ret; } /* setup the clock request gpio first */ - arche_pdata->svc_refclk_req = of_get_named_gpio(np, - "svc,refclk-req-gpio", - 0); - if (!gpio_is_valid(arche_pdata->svc_refclk_req)) { - dev_err(dev, "failed to get svc clock-req gpio\n"); - return arche_pdata->svc_refclk_req; - } - ret = devm_gpio_request(dev, arche_pdata->svc_refclk_req, - "svc-clk-req"); - if (ret) { - dev_err(dev, "failed to request svc-clk-req gpio: %d\n", ret); - return ret; - } - ret = gpio_direction_input(arche_pdata->svc_refclk_req); - if (ret) { - dev_err(dev, "failed to set svc-clk-req gpio dir :%d\n", ret); + arche_pdata->svc_refclk_req = devm_gpiod_get(dev, "svc,refclk-req", + GPIOD_IN); + if (IS_ERR(arche_pdata->svc_refclk_req)) { + ret = PTR_ERR(arche_pdata->svc_refclk_req); + dev_err(dev, "failed to request svc-clk-req GPIO: %d\n", ret); return ret; } @@ -515,19 +481,11 @@ static int arche_platform_probe(struct platform_device *pdev) arche_pdata->num_apbs = of_get_child_count(np); dev_dbg(dev, "Number of APB's available - %d\n", arche_pdata->num_apbs); - arche_pdata->wake_detect_gpio = of_get_named_gpio(np, - "svc,wake-detect-gpio", - 0); - if (arche_pdata->wake_detect_gpio < 0) { - dev_err(dev, "failed to get wake detect gpio\n"); - return arche_pdata->wake_detect_gpio; - } - - ret = devm_gpio_request(dev, arche_pdata->wake_detect_gpio, - "wake detect"); - if (ret) { - dev_err(dev, "Failed requesting wake_detect gpio %d\n", - arche_pdata->wake_detect_gpio); + arche_pdata->wake_detect = devm_gpiod_get(dev, "svc,wake-detect", + GPIOD_IN); + if (IS_ERR(arche_pdata->wake_detect)) { + ret = PTR_ERR(arche_pdata->wake_detect); + dev_err(dev, "Failed requesting wake_detect GPIO: %d\n", ret); return ret; } @@ -538,7 +496,7 @@ static int arche_platform_probe(struct platform_device *pdev) spin_lock_init(&arche_pdata->wake_lock); mutex_init(&arche_pdata->platform_state_mutex); arche_pdata->wake_detect_irq = - gpio_to_irq(arche_pdata->wake_detect_gpio); + gpiod_to_irq(arche_pdata->wake_detect); ret = devm_request_threaded_irq(dev, arche_pdata->wake_detect_irq, arche_platform_wd_irq, |