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Wed, 27 Sep 2023 10:39:18 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778223691386849083 X-GMAIL-MSGID: 1778223691386849083 Add a compatible string for Nuvoton BMC NPCM845 Pulse Width Modulation (PWM) and Fan tach controller. Signed-off-by: Tomer Maimon Acked-by: Rob Herring --- Documentation/devicetree/bindings/hwmon/npcm750-pwm-fan.txt | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/hwmon/npcm750-pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/npcm750-pwm-fan.txt index 8523777f560c..18095ba87a5a 100644 --- a/Documentation/devicetree/bindings/hwmon/npcm750-pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/npcm750-pwm-fan.txt @@ -1,12 +1,16 @@ -Nuvoton NPCM7xx PWM and Fan Tacho controller device +Nuvoton NPCM PWM and Fan Tacho controller device The Nuvoton BMC NPCM7XX supports 8 Pulse-width modulation (PWM) controller outputs and 16 Fan tachometer controller inputs. +The Nuvoton BMC NPCM8XX supports 12 Pulse-width modulation (PWM) +controller outputs and 16 Fan tachometer controller inputs. + Required properties for pwm-fan node - #address-cells : should be 1. - #size-cells : should be 0. - compatible : "nuvoton,npcm750-pwm-fan" for Poleg NPCM7XX. + : "nuvoton,npcm845-pwm-fan" for Arbel NPCM8XX. - reg : specifies physical base address and size of the registers. - reg-names : must contain: * "pwm" for the PWM registers. 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Wed, 27 Sep 2023 10:39:17 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778230225717106535 X-GMAIL-MSGID: 1778230225717106535 Adding Pulse Width Modulation (PWM) and fan tacho NPCM8xx support to NPCM PWM and fan tacho driver. NPCM8xx uses a different number of PWM devices. As part of adding NPCM8XX support: - Add NPCM8xx specific compatible string. - Add data to handle architecture-specific PWM and fan tacho parameters. Signed-off-by: Tomer Maimon --- drivers/hwmon/npcm750-pwm-fan.c | 161 +++++++++++++++++++++++++++----- 1 file changed, 136 insertions(+), 25 deletions(-) diff --git a/drivers/hwmon/npcm750-pwm-fan.c b/drivers/hwmon/npcm750-pwm-fan.c index 10ed3f4335d4..324de4482e71 100644 --- a/drivers/hwmon/npcm750-pwm-fan.c +++ b/drivers/hwmon/npcm750-pwm-fan.c @@ -45,11 +45,6 @@ #define NPCM7XX_PWM_CTRL_CH2_EN_BIT BIT(12) #define NPCM7XX_PWM_CTRL_CH3_EN_BIT BIT(16) -/* Define the maximum PWM channel number */ -#define NPCM7XX_PWM_MAX_CHN_NUM 8 -#define NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE 4 -#define NPCM7XX_PWM_MAX_MODULES 2 - /* Define the Counter Register, value = 100 for match 100% */ #define NPCM7XX_PWM_COUNTER_DEFAULT_NUM 255 #define NPCM7XX_PWM_CMR_DEFAULT_NUM 255 @@ -138,11 +133,9 @@ #define NPCM7XX_FAN_TCPCFG_CPASEL BIT(0) /* FAN General Definition */ -/* Define the maximum FAN channel number */ -#define NPCM7XX_FAN_MAX_MODULE 8 +/* Define the PWM and FAN in a module */ +#define NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE 4 #define NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE 2 -#define NPCM7XX_FAN_MAX_CHN_NUM 16 - /* * Get Fan Tach Timeout (base on clock 214843.75Hz, 1 cnt = 4.654us) * Timeout 94ms ~= 0x5000 @@ -171,6 +164,15 @@ #define FAN_PREPARE_TO_GET_FIRST_CAPTURE 0x01 #define FAN_ENOUGH_SAMPLE 0x02 +struct npcm_hwmon_info { + u32 pwm_max_modules; + u32 pwm_max_ch; + u32 fan_max_modules; + u32 fan_max_ch; + const struct hwmon_chip_info *hinfo; + const char *name; +}; + struct npcm7xx_fan_dev { u8 fan_st_flg; u8 fan_pls_per_rev; @@ -195,15 +197,16 @@ struct npcm7xx_pwm_fan_data { unsigned long fan_clk_freq; struct clk *pwm_clk; struct clk *fan_clk; - struct mutex pwm_lock[NPCM7XX_PWM_MAX_MODULES]; - spinlock_t fan_lock[NPCM7XX_FAN_MAX_MODULE]; - int fan_irq[NPCM7XX_FAN_MAX_MODULE]; - bool pwm_present[NPCM7XX_PWM_MAX_CHN_NUM]; - bool fan_present[NPCM7XX_FAN_MAX_CHN_NUM]; + struct mutex *pwm_lock; + spinlock_t *fan_lock; + int *fan_irq; + bool *pwm_present; + bool *fan_present; u32 input_clk_freq; struct timer_list fan_timer; - struct npcm7xx_fan_dev fan_dev[NPCM7XX_FAN_MAX_CHN_NUM]; - struct npcm7xx_cooling_device *cdev[NPCM7XX_PWM_MAX_CHN_NUM]; + struct npcm7xx_fan_dev *fan_dev; + struct npcm7xx_cooling_device **cdev; + const struct npcm_hwmon_info *info; u8 fan_select; }; @@ -333,7 +336,7 @@ static void npcm7xx_fan_polling(struct timer_list *t) * Polling two module per one round, * FAN01 & FAN89 / FAN23 & FAN1011 / FAN45 & FAN1213 / FAN67 & FAN1415 */ - for (i = data->fan_select; i < NPCM7XX_FAN_MAX_MODULE; + for (i = data->fan_select; i < data->info->fan_max_modules; i = i + 4) { /* clear the flag and reset the counter (TCNT) */ iowrite8(NPCM7XX_FAN_TICLR_CLEAR_ALL, @@ -659,6 +662,40 @@ static const struct hwmon_channel_info * const npcm7xx_info[] = { NULL }; +static const struct hwmon_channel_info * const npcm8xx_info[] = { + HWMON_CHANNEL_INFO(pwm, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT), + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT), + NULL +}; + static const struct hwmon_ops npcm7xx_hwmon_ops = { .is_visible = npcm7xx_is_visible, .read = npcm7xx_read, @@ -670,6 +707,29 @@ static const struct hwmon_chip_info npcm7xx_chip_info = { .info = npcm7xx_info, }; +static const struct hwmon_chip_info npcm8xx_chip_info = { + .ops = &npcm7xx_hwmon_ops, + .info = npcm8xx_info, +}; + +static const struct npcm_hwmon_info npxm7xx_hwmon_info = { + .pwm_max_modules = 2, + .pwm_max_ch = NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE * 2, + .fan_max_modules = 8, + .fan_max_ch = NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE * 8, + .hinfo = &npcm7xx_chip_info, + .name = "npcm7xx_pwm_fan", +}; + +static const struct npcm_hwmon_info npxm8xx_hwmon_info = { + .pwm_max_modules = 3, + .pwm_max_ch = NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE * 3, + .fan_max_modules = 8, + .fan_max_ch = NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE * 8, + .hinfo = &npcm8xx_chip_info, + .name = "npcm8xx_pwm_fan", +}; + static u32 npcm7xx_pwm_init(struct npcm7xx_pwm_fan_data *data) { int m, ch; @@ -693,7 +753,7 @@ static u32 npcm7xx_pwm_init(struct npcm7xx_pwm_fan_data *data) /* Setting PWM Prescale Register value register to both modules */ prescale_val |= (prescale_val << NPCM7XX_PWM_PRESCALE_SHIFT_CH01); - for (m = 0; m < NPCM7XX_PWM_MAX_MODULES ; m++) { + for (m = 0; m < data->info->pwm_max_modules ; m++) { iowrite32(prescale_val, NPCM7XX_PWM_REG_PR(data->pwm_base, m)); iowrite32(NPCM7XX_PWM_PRESCALE2_DEFAULT, NPCM7XX_PWM_REG_CSR(data->pwm_base, m)); @@ -716,7 +776,7 @@ static void npcm7xx_fan_init(struct npcm7xx_pwm_fan_data *data) int i; u32 apb_clk_freq; - for (md = 0; md < NPCM7XX_FAN_MAX_MODULE; md++) { + for (md = 0; md < data->info->fan_max_modules; md++) { /* stop FAN0~7 clock */ iowrite8(NPCM7XX_FAN_TCKC_CLKX_NONE, NPCM7XX_FAN_REG_TCKC(data->fan_base, md)); @@ -905,6 +965,49 @@ static int npcm7xx_en_pwm_fan(struct device *dev, return 0; } +static int npcm_pwm_fan_alloc_data(struct device *dev, + struct npcm7xx_pwm_fan_data *data) +{ + data->pwm_lock = devm_kcalloc(dev, data->info->pwm_max_modules, + sizeof(*data->pwm_lock), GFP_KERNEL); + if (!data->pwm_lock) + return -ENOMEM; + + data->fan_lock = devm_kcalloc(dev, data->info->fan_max_modules, + sizeof(*data->fan_lock), GFP_KERNEL); + if (!data->fan_lock) + return -ENOMEM; + + data->fan_irq = devm_kcalloc(dev, data->info->fan_max_modules, + sizeof(*data->fan_irq), GFP_KERNEL); + if (!data->fan_irq) + return -ENOMEM; + + data->pwm_present = devm_kcalloc(dev, data->info->pwm_max_ch, + sizeof(*data->pwm_present), + GFP_KERNEL); + if (!data->pwm_present) + return -ENOMEM; + + data->fan_present = devm_kcalloc(dev, data->info->fan_max_ch, + sizeof(*data->fan_present), + GFP_KERNEL); + if (!data->fan_present) + return -ENOMEM; + + data->fan_dev = devm_kcalloc(dev, data->info->fan_max_ch, + sizeof(*data->fan_dev), GFP_KERNEL); + if (!data->fan_dev) + return -ENOMEM; + + data->cdev = devm_kcalloc(dev, data->info->pwm_max_ch, + sizeof(*data->cdev), GFP_KERNEL); + if (!data->cdev) + return -ENOMEM; + + return 0; +} + static int npcm7xx_pwm_fan_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -923,6 +1026,13 @@ static int npcm7xx_pwm_fan_probe(struct platform_device *pdev) if (!data) return -ENOMEM; + data->info = device_get_match_data(dev); + if (!data->info) + return -EINVAL; + + if (npcm_pwm_fan_alloc_data(dev, data)) + return -ENOMEM; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm"); if (!res) { dev_err(dev, "pwm resource not found\n"); @@ -960,10 +1070,10 @@ static int npcm7xx_pwm_fan_probe(struct platform_device *pdev) output_freq = npcm7xx_pwm_init(data); npcm7xx_fan_init(data); - for (cnt = 0; cnt < NPCM7XX_PWM_MAX_MODULES ; cnt++) + for (cnt = 0; cnt < data->info->pwm_max_modules ; cnt++) mutex_init(&data->pwm_lock[cnt]); - for (i = 0; i < NPCM7XX_FAN_MAX_MODULE; i++) { + for (i = 0; i < data->info->fan_max_modules; i++) { spin_lock_init(&data->fan_lock[i]); data->fan_irq[i] = platform_get_irq(pdev, i); @@ -988,15 +1098,15 @@ static int npcm7xx_pwm_fan_probe(struct platform_device *pdev) } } - hwmon = devm_hwmon_device_register_with_info(dev, "npcm7xx_pwm_fan", - data, &npcm7xx_chip_info, + hwmon = devm_hwmon_device_register_with_info(dev, data->info->name, + data, data->info->hinfo, NULL); if (IS_ERR(hwmon)) { dev_err(dev, "unable to register hwmon device\n"); return PTR_ERR(hwmon); } - for (i = 0; i < NPCM7XX_FAN_MAX_CHN_NUM; i++) { + for (i = 0; i < data->info->fan_max_ch; i++) { if (data->fan_present[i]) { /* fan timer initialization */ data->fan_timer.expires = jiffies + @@ -1015,7 +1125,8 @@ static int npcm7xx_pwm_fan_probe(struct platform_device *pdev) } static const struct of_device_id of_pwm_fan_match_table[] = { - { .compatible = "nuvoton,npcm750-pwm-fan", }, + { .compatible = "nuvoton,npcm750-pwm-fan", .data = &npxm7xx_hwmon_info}, + { .compatible = "nuvoton,npcm845-pwm-fan", .data = &npxm8xx_hwmon_info}, {}, }; MODULE_DEVICE_TABLE(of, of_pwm_fan_match_table);